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<h3>
Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88">6de40f83</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-09-22T05:37:24-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Better eta-expansion (again) and don't specilise DFuns
This patch fixes #18223, which made GHC generate an exponential
amount of code. There are three quite separate changes in here
1. Re-engineer eta-expansion (again). The eta-expander was
generating lots of intermediate stuff, which could be optimised
away, but which choked the simplifier meanwhile. Relatively
easy to kill it off at source.
See Note [The EtaInfo mechanism] in GHC.Core.Opt.Arity.
The main new thing is the use of pushCoArg in getArg_maybe.
2. Stop Specialise specalising DFuns. This is the cause of a huge
(and utterly unnecessary) blowup in program size in #18223.
See Note [Do not specialise DFuns] in GHC.Core.Opt.Specialise.
I also refactored the Specialise monad a bit... it was silly,
because it passed on unchanging values as if they were mutable
state.
3. Do an extra Simplifer run, after SpecConstra and before
late-Specialise. I found (investigating perf/compiler/T16473)
that failing to do this was crippling *both* SpecConstr *and*
Specialise. See Note [Simplify after SpecConstr] in
GHC.Core.Opt.Pipeline.
This change does mean an extra run of the Simplifier, but only
with -O2, and I think that's acceptable.
T16473 allocates *three* times less with this change. (I changed
it to check runtime rather than compile time.)
Some smaller consequences
* I moved pushCoercion, pushCoArg and friends from SimpleOpt
to Arity, because it was needed by the new etaInfoApp.
And pushCoValArg now returns a MCoercion rather than Coercion for
the argument Coercion.
* A minor, incidental improvement to Core pretty-printing
This does fix #18223, (which was otherwise uncompilable. Hooray. But
there is still a big intermediate because there are some very deeply
nested types in that program.
Modest reductions in compile-time allocation on a couple of benchmarks
T12425 -2.0%
T13253 -10.3%
Metric increase with -O2, due to extra simplifier run
T9233 +5.8%
T12227 +1.8%
T15630 +5.0%
There is a spurious apparent increase on heap residency on T9630,
on some architectures at least. I tried it with -G1 and the residency
is essentially unchanged.
Metric Increase
T9233
T12227
T9630
Metric Decrease
T12425
T13253
</pre>
</li>
</ul>
<h4>16 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#783e5dae6e86931f06700fc088fb7d48c8a07386">
compiler/GHC/Core/Coercion.hs
</a>
</li>
<li class="file-stats">
<a href="#c3967bb9d3e8f5aae2dd111b5a335b48c21c1999">
compiler/GHC/Core/Opt/Arity.hs
</a>
</li>
<li class="file-stats">
<a href="#bd153f89bc48f3fd5079b51fb799808aacbd750c">
compiler/GHC/Core/Opt/Pipeline.hs
</a>
</li>
<li class="file-stats">
<a href="#f168a93cde5e2aec2441d6331dfe500172df4af3">
compiler/GHC/Core/Opt/Simplify.hs
</a>
</li>
<li class="file-stats">
<a href="#2f46b19cb85e3f7b4e72305644bc50015628c41d">
compiler/GHC/Core/Opt/Simplify/Env.hs
</a>
</li>
<li class="file-stats">
<a href="#ab22d7ae4d245581b701367e386d7e886e416e76">
compiler/GHC/Core/Opt/Specialise.hs
</a>
</li>
<li class="file-stats">
<a href="#a8e2a1e5829eb3b4809201e0f47e91b64ce11b96">
compiler/GHC/Core/Ppr.hs
</a>
</li>
<li class="file-stats">
<a href="#11ffe98a94d798427bc600e4fcfe899407536346">
compiler/GHC/Core/SimpleOpt.hs
</a>
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<li class="file-stats">
<a href="#708fab0a51bd47227233eda4698e750ff6de66e0">
compiler/GHC/Core/Subst.hs
</a>
</li>
<li class="file-stats">
<a href="#e1f1fd9ebe1a9c58f6f2c996009bd7dc94a4926c">
testsuite/tests/perf/compiler/Makefile
</a>
</li>
<li class="file-stats">
<a href="#b788976ba3555853d385fd1c6246444c972d749f">
testsuite/tests/perf/compiler/T16473.stdout
</a>
</li>
<li class="file-stats">
<a href="#1c5849d3d6a9f35c35886d7226c1a530fa671709">
<span class="new-file">
+
testsuite/tests/perf/compiler/T18223.hs
</span>
</a>
</li>
<li class="file-stats">
<a href="#fd4a0b65d74153aed8b33b01a04eb3ff7442cd45">
testsuite/tests/perf/compiler/all.T
</a>
</li>
<li class="file-stats">
<a href="#4eac8054f8dc90b076e0df14ffea14d1df68e1b4">
testsuite/tests/printer/T18052a.stderr
</a>
</li>
<li class="file-stats">
<a href="#80069ab3e335f49718f742deb0c488301329eb49">
testsuite/tests/simplCore/should_compile/T17966.stdout
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</li>
<li class="file-stats">
<a href="#74e8fe4df7797f1e4a6a8c126c9397d2ac5f8b31">
testsuite/tests/stranal/should_compile/T18122.stderr
</a>
</li>
</ul>
<h4>Changes:</h4>
<li id="783e5dae6e86931f06700fc088fb7d48c8a07386">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#783e5dae6e86931f06700fc088fb7d48c8a07386"><strong>compiler/GHC/Core/Coercion.hs</strong></a>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="31" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="31" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -31,7 +31,7 @@ module GHC.Core.Coercion (</td>
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<td class="diff-line-num old_line" data-linenumber="31" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
31
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<td class="diff-line-num new_line" data-linenumber="31" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
31
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkAxInstRHS</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkUnbranchedAxInstRHS</span><span class="p">,</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="32" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
32
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<td class="diff-line-num new_line" data-linenumber="32" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkAxInstLHS</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkUnbranchedAxInstLHS</span><span class="p">,</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="33" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
33
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<td class="diff-line-num new_line" data-linenumber="33" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
33
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkPiCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkPiCos</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkCoCast</span><span class="p">,</span></span>
</pre>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="34" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
34
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<td class="diff-line-num new_line old" data-linenumber="34" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC34" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkSymCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTransCo</span><span class="p">,</span><span class="idiff left"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">mkTransMCo</span></span><span class="p"><span class="idiff right">,</span></span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="35" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<td class="diff-line-num new new_line" data-linenumber="34" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkSymCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTransCo</span><span class="p">,</span></span>
</pre>
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<tr class="line_holder" id="" style="line-height: 1.6;">
<td class="diff-line-num old_line" data-linenumber="35" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
35
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<td class="diff-line-num new_line" data-linenumber="35" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC35" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkNthCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nthCoRole</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkLRCo</span><span class="p">,</span></span>
</pre>
</td>
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<tr class="line_holder" id="" style="line-height: 1.6;">
<td class="diff-line-num old_line" data-linenumber="36" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<td class="diff-line-num new_line" data-linenumber="36" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
36
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC36" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkInstCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkAppCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkAppCos</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTyConAppCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkFunCo</span><span class="p">,</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="37" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
37
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkForAllCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkForAllCos</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkHomoForAllCos</span><span class="p">,</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="65" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="65" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -65,7 +65,8 @@ module GHC.Core.Coercion (</td>
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<td class="diff-line-num old_line" data-linenumber="65" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<td class="diff-line-num new_line" data-linenumber="65" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC65" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">pickLR</span><span class="p">,</span></span>
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<td class="diff-line-num old_line" data-linenumber="66" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<td class="diff-line-num new_line" data-linenumber="66" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC66" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="67" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isGReflCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isReflCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isReflCo_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isGReflCo_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isReflexiveCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isReflexiveCo_maybe</span><span class="p">,</span></span>
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<td class="diff-line-num old old_line" data-linenumber="68" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
68
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<td class="diff-line-num new_line old" data-linenumber="68" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC68" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isReflCoVar_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isGReflMCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">coToMCo</span><span class="p">,</span></span>
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<td class="diff-line-num new old_line" data-linenumber="69" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<td class="diff-line-num new new_line" data-linenumber="68" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC68" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isReflCoVar_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isGReflMCo</span><span class="p">,</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC69" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">coToMCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTransMCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTransMCoL</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ** Coercion variables</span></span>
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<pre style="margin: 0;"> <span id="LC72" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkCoVar</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isCoVar</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">coVarName</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">setCoVarName</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">setCoVarUnique</span><span class="p">,</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -288,6 +289,44 @@ tidyCoAxBndrsForUser init_env tcvs</td>
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<pre style="margin: 0;"> <span id="LC289" class="line" lang="haskell"> <span class="p">(</span><span class="sc" style="color: #d14;">'_'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rest</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">all</span> <span class="n" style="color: #333;">isDigit</span> <span class="n" style="color: #333;">rest</span></span>
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<pre style="margin: 0;"> <span id="LC290" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;"> <span id="LC291" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC292" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC293" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
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<pre style="margin: 0;">+<span id="LC294" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<pre style="margin: 0;">+<span id="LC295" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> MCoercion</span></span>
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<pre style="margin: 0;">+<span id="LC296" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<pre style="margin: 0;">+<span id="LC297" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">********************************************************************* -}</span></span>
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<pre style="margin: 0;">+<span id="LC298" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC299" class="line" lang="haskell"><span class="n" style="color: #333;">coToMCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span></span>
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<pre style="margin: 0;">+<span id="LC300" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Convert a coercion to a MCoercion,</span></span>
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<pre style="margin: 0;">+<span id="LC301" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- It's not clear whether or not isReflexiveCo would be better here</span></span>
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<pre style="margin: 0;">+<span id="LC302" class="line" lang="haskell"><span class="n" style="color: #333;">coToMCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span></span>
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<pre style="margin: 0;">+<span id="LC303" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span></span>
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<pre style="margin: 0;">+<span id="LC304" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC305" class="line" lang="haskell"><span class="cd">-- | Tests if this MCoercion is obviously generalized reflexive</span></span>
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<pre style="margin: 0;">+<span id="LC306" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Guaranteed to work very quickly.</span></span>
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<pre style="margin: 0;">+<span id="LC307" class="line" lang="haskell"><span class="n" style="color: #333;">isGReflMCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC308" class="line" lang="haskell"><span class="n" style="color: #333;">isGReflMCo</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">+<span id="LC309" class="line" lang="haskell"><span class="n" style="color: #333;">isGReflMCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isGReflCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">+<span id="LC310" class="line" lang="haskell"><span class="n" style="color: #333;">isGReflMCo</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;">+<span id="LC311" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC312" class="line" lang="haskell"><span class="cd">-- | Make a generalized reflexive coercion</span></span>
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<pre style="margin: 0;">+<span id="LC313" class="line" lang="haskell"><span class="n" style="color: #333;">mkGReflCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Role</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercionN</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span></span>
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<pre style="margin: 0;">+<span id="LC314" class="line" lang="haskell"><span class="n" style="color: #333;">mkGReflCo</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">mco</span></span>
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<pre style="margin: 0;">+<span id="LC315" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isGReflMCo</span> <span class="n" style="color: #333;">mco</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">Refl</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">+<span id="LC316" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="kt" style="color: #458; font-weight: 600;">GRefl</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">ty</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span></span>
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<pre style="margin: 0;">+<span id="LC317" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">GRefl</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">mco</span></span>
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<pre style="margin: 0;">+<span id="LC318" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC319" class="line" lang="haskell"><span class="cd">-- | Compose two MCoercions via transitivity</span></span>
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<pre style="margin: 0;">+<span id="LC320" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span></span>
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<pre style="margin: 0;">+<span id="LC321" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCo</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">co2</span></span>
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<pre style="margin: 0;">+<span id="LC322" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCo</span> <span class="n" style="color: #333;">co1</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">co1</span></span>
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<pre style="margin: 0;">+<span id="LC323" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co1</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkTransCo</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC324" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC325" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCoL</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span></span>
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<pre style="margin: 0;">+<span id="LC326" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCoL</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co2</span></span>
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<pre style="margin: 0;">+<span id="LC327" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCoL</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co1</span><span class="p">)</span> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkTransCo</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC328" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC330" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<pre style="margin: 0;"> <span id="LC331" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">%************************************************************************</span></span>
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332
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<pre style="margin: 0;"> <span id="LC332" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">%* *</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -556,13 +595,6 @@ isGReflCo (GRefl{}) = True</td>
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<pre style="margin: 0;"> <span id="LC595" class="line" lang="haskell"><span class="n" style="color: #333;">isGReflCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Refl</span><span class="p">{})</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="c1" style="color: #998; font-style: italic;">-- Refl ty == GRefl N ty MRefl</span></span>
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<pre style="margin: 0;"> <span id="LC596" class="line" lang="haskell"><span class="n" style="color: #333;">isGReflCo</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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597
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<pre style="margin: 0;"> <span id="LC597" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC559" class="line" lang="haskell"><span class="cd">-- | Tests if this MCoercion is obviously generalized reflexive</span></span>
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<pre style="margin: 0;">-<span id="LC560" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Guaranteed to work very quickly.</span></span>
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<pre style="margin: 0;">-<span id="LC561" class="line" lang="haskell"><span class="n" style="color: #333;">isGReflMCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">-<span id="LC562" class="line" lang="haskell"><span class="n" style="color: #333;">isGReflMCo</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">-<span id="LC563" class="line" lang="haskell"><span class="n" style="color: #333;">isGReflMCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isGReflCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">-<span id="LC564" class="line" lang="haskell"><span class="n" style="color: #333;">isGReflMCo</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;">-<span id="LC565" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC598" class="line" lang="haskell"><span class="cd">-- | Tests if this coercion is obviously reflexive. Guaranteed to work</span></span>
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<pre style="margin: 0;"> <span id="LC599" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- very quickly. Sometimes a coercion can be reflexive, but not obviously</span></span>
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<pre style="margin: 0;"> <span id="LC600" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- so. c.f. 'isReflexiveCo'</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -603,10 +635,6 @@ isReflexiveCo_maybe co</td>
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<pre style="margin: 0;"> <span id="LC635" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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<pre style="margin: 0;"> <span id="LC636" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span><span class="p">,</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKindRole</span> <span class="n" style="color: #333;">co</span></span>
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<pre style="margin: 0;"> <span id="LC637" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC606" class="line" lang="haskell"><span class="n" style="color: #333;">coToMCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span></span>
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<pre style="margin: 0;">-<span id="LC607" class="line" lang="haskell"><span class="n" style="color: #333;">coToMCo</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">c</span></span>
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<pre style="margin: 0;">-<span id="LC608" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span></span>
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609
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<pre style="margin: 0;">-<span id="LC609" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">c</span></span>
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<pre style="margin: 0;"> <span id="LC638" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC639" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<pre style="margin: 0;"> <span id="LC640" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">%************************************************************************</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -669,13 +697,6 @@ role is bizarre and a caller should have to ask for this behavior explicitly.</td>
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<pre style="margin: 0;"> <span id="LC697" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC698" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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<pre style="margin: 0;"> <span id="LC699" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC672" class="line" lang="haskell"><span class="cd">-- | Make a generalized reflexive coercion</span></span>
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<pre style="margin: 0;">-<span id="LC673" class="line" lang="haskell"><span class="n" style="color: #333;">mkGReflCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Role</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercionN</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span></span>
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<pre style="margin: 0;">-<span id="LC674" class="line" lang="haskell"><span class="n" style="color: #333;">mkGReflCo</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">mco</span></span>
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<pre style="margin: 0;">-<span id="LC675" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isGReflMCo</span> <span class="n" style="color: #333;">mco</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">Refl</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">-<span id="LC676" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="kt" style="color: #458; font-weight: 600;">GRefl</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">ty</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span></span>
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<pre style="margin: 0;">-<span id="LC677" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">GRefl</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">mco</span></span>
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<pre style="margin: 0;">-<span id="LC678" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC700" class="line" lang="haskell"><span class="cd">-- | Make a reflexive coercion</span></span>
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<pre style="margin: 0;"> <span id="LC701" class="line" lang="haskell"><span class="n" style="color: #333;">mkReflCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Role</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span></span>
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<pre style="margin: 0;"> <span id="LC702" class="line" lang="haskell"><span class="n" style="color: #333;">mkReflCo</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Refl</span> <span class="n" style="color: #333;">ty</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -990,12 +1011,6 @@ mkTransCo (GRefl r t1 (MCo co1)) (GRefl _ _ (MCo co2))</td>
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<pre style="margin: 0;"> <span id="LC1011" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">GRefl</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkTransCo</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1012" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransCo</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TransCo</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">co2</span></span>
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<pre style="margin: 0;"> <span id="LC1013" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC993" class="line" lang="haskell"><span class="cd">-- | Compose two MCoercions via transitivity</span></span>
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<pre style="margin: 0;">-<span id="LC994" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span></span>
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<pre style="margin: 0;">-<span id="LC995" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCo</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">co2</span></span>
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<pre style="margin: 0;">-<span id="LC996" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCo</span> <span class="n" style="color: #333;">co1</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">co1</span></span>
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<pre style="margin: 0;">-<span id="LC997" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransMCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co1</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkTransCo</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC998" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1014" class="line" lang="haskell"><span class="n" style="color: #333;">mkNthCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span></span>
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<pre style="margin: 0;"> <span id="LC1015" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Role</span> <span class="c1" style="color: #998; font-style: italic;">-- The role of the coercion you're creating</span></span>
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<pre style="margin: 0;"> <span id="LC1016" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="c1" style="color: #998; font-style: italic;">-- Zero-indexed</span></span>
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<li id="c3967bb9d3e8f5aae2dd111b5a335b48c21c1999">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#c3967bb9d3e8f5aae2dd111b5a335b48c21c1999"><strong>compiler/GHC/Core/Opt/Arity.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -15,10 +15,18 @@ module GHC.Core.Opt.Arity</td>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">manifestArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">joinRhsArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">exprArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">typeArity</span></span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">exprEtaExpandArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">findRhsArity</span></span>
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpand</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpandAT</span></span>
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<pre style="margin: 0;">-<span id="LC18" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpandToJoinPoint</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpandToJoinPointRule</span></span>
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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">exprBotStrictness_maybe</span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ** ArityType</span></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ArityType</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">expandableArityType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">arityTypeArity</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">maxWithArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isBotArityType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">idArityType</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ** Join points</span></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpandToJoinPoint</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpandToJoinPointRule</span></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ** Coercions and casts</span></span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoArg</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoArgs</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoValArg</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoTyArg</span></span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoercionIntoLambda</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoDataCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">collectBindersPushingCo</span></span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -31,15 +39,21 @@ import GHC.Driver.Ppr</td>
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<pre style="margin: 0;"> <span id="LC39" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core</span></span>
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<pre style="margin: 0;"> <span id="LC40" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.FVs</span></span>
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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Utils</span></span>
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<pre style="margin: 0;">-<span id="LC34" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Subst</span></span>
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<pre style="margin: 0;"> <span id="LC42" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Demand</span></span>
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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var</span></span>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Env</span></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Id</span></span>
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<pre style="margin: 0;">-<span id="LC39" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Type</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">Type</span></span>
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<pre style="margin: 0;">-<span id="LC40" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCon</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">initRecTc</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">checkRecTc</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC47" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We have two sorts of substitution:</span></span>
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<pre style="margin: 0;">+<span id="LC48" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- GHC.Core.Subst.Subst, and GHC.Core.TyCo.TCvSubst</span></span>
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<pre style="margin: 0;">+<span id="LC49" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Both have substTy, substCo Hence need for qualification</span></span>
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<pre style="margin: 0;">+<span id="LC50" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Subst</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">Core</span></span>
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<pre style="margin: 0;">+<span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Type</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">Type</span></span>
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<pre style="margin: 0;">+<span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Coercion</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">Type</span></span>
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<pre style="margin: 0;">+<span id="LC53" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.DataCon</span></span>
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<pre style="margin: 0;">+<span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCon</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">initRecTc</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">checkRecTc</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tyConArity</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Predicate</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">isDictTy</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC42" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Coercion</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">Coercion</span></span>
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<pre style="margin: 0;"> <span id="LC57" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Multiplicity</span></span>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Set</span></span>
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<pre style="margin: 0;"> <span id="LC59" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Basic</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -48,7 +62,8 @@ import GHC.Driver.Session ( DynFlags, GeneralFlag(..), gopt )</td>
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<pre style="margin: 0;"> <span id="LC62" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Outputable</span></span>
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<pre style="margin: 0;"> <span id="LC63" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Panic</span></span>
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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.FastString</span></span>
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<pre style="margin: 0;">-<span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Misc</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">lengthAtLeast</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC65" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.Pair</span></span>
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<pre style="margin: 0;">+<span id="LC66" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Misc</span></span>
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1076,12 +1091,11 @@ eta_expand one_shots orig_expr</td>
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1091
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<pre style="margin: 0;"> <span id="LC1091" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">oss</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">oss</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span> <span class="n" style="color: #333;">co</span></span>
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1077
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1092
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<pre style="margin: 0;"> <span id="LC1092" class="line" lang="haskell"></span>
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1078
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1093
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<pre style="margin: 0;"> <span id="LC1093" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">oss</span> <span class="n" style="color: #333;">expr</span></span>
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1079
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<pre style="margin: 0;">-<span id="LC1079" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "ee" (vcat [ppr orig_expr, ppr expr, ppr etas]) $</span></span>
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1080
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<pre style="margin: 0;">-<span id="LC1080" class="line" lang="haskell"> <span class="n" style="color: #333;">retick</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">etaInfoAbs</span> <span class="n" style="color: #333;">etas</span> <span class="p">(</span><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;"><span class="idiff left right">subst</span>'</span> <span class="n" style="color: #333;">sexpr</span> <span class="n" style="color: #333;">etas</span><span class="p">)</span></span>
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1094
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<pre style="margin: 0;">+<span id="LC1094" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "ee" (vcat [ppr orig_expr, ppr expr, ppr<span class="idiff left right">EtaInfos</span> etas]) $</span></span>
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<pre style="margin: 0;">+<span id="LC1095" class="line" lang="haskell"> <span class="n" style="color: #333;">retick</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">etaInfoAbs</span> <span class="n" style="color: #333;">etas</span> <span class="p">(</span><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;"><span class="idiff left right">in_scope</span>'</span> <span class="n" style="color: #333;">sexpr</span> <span class="n" style="color: #333;">etas</span><span class="p">)</span></span>
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1081
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1096
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<pre style="margin: 0;"> <span id="LC1096" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1082
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1097
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<pre style="margin: 0;"> <span id="LC1097" class="line" lang="haskell"> <span class="n" style="color: #333;">in_scope</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkInScopeSet</span> <span class="p">(</span><span class="n" style="color: #333;">exprFreeVars</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span></span>
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1083
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1098
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<pre style="margin: 0;"> <span id="LC1098" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">in_scope'</span><span class="p">,</span> <span class="n" style="color: #333;">etas</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkEtaWW</span> <span class="n" style="color: #333;">oss</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">orig_expr</span><span class="p">)</span> <span class="n" style="color: #333;">in_scope</span> <span class="p">(</span><span class="n" style="color: #333;">exprType</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span></span>
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1084
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<pre style="margin: 0;">-<span id="LC1084" class="line" lang="haskell"> <span class="n" style="color: #333;">subst'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkEmptySubst</span> <span class="n" style="color: #333;">in_scope'</span></span>
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1085
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1099
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<pre style="margin: 0;"> <span id="LC1099" class="line" lang="haskell"></span>
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1086
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1100
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<pre style="margin: 0;"> <span id="LC1100" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Find ticks behind type apps.</span></span>
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1087
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1101
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<pre style="margin: 0;"> <span id="LC1101" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Eta expansion and source notes]</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1104" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1090,76 +1104,197 @@ eta_expand one_shots orig_expr</td>
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1090
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1104
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<pre style="margin: 0;"> <span id="LC1104" class="line" lang="haskell"> <span class="n" style="color: #333;">sexpr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldl'</span> <span class="kt" style="color: #458; font-weight: 600;">App</span> <span class="n" style="color: #333;">expr''</span> <span class="n" style="color: #333;">args</span></span>
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1091
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1105
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<pre style="margin: 0;"> <span id="LC1105" class="line" lang="haskell"> <span class="n" style="color: #333;">retick</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">mkTick</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">ticks</span></span>
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1092
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1106
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<pre style="margin: 0;"> <span id="LC1106" class="line" lang="haskell"></span>
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1093
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<pre style="margin: 0;">-<span id="LC1093" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Abstraction Application</span></span>
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1107
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<pre style="margin: 0;">+<span id="LC1107" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
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1108
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<pre style="margin: 0;">+<span id="LC1108" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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1109
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<pre style="margin: 0;">+<span id="LC1109" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> The EtaInfo mechanism</span></span>
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1110
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<pre style="margin: 0;">+<span id="LC1110" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> mkEtaWW, etaInfoAbs, etaInfoApp</span></span>
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1111
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<pre style="margin: 0;">+<span id="LC1111" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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1112
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<pre style="margin: 0;">+<span id="LC1112" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">********************************************************************* -}</span></span>
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1113
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<pre style="margin: 0;">+<span id="LC1113" class="line" lang="haskell"></span>
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1114
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<pre style="margin: 0;">+<span id="LC1114" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [The EtaInfo mechanism]</span></span>
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1115
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<pre style="margin: 0;">+<span id="LC1115" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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1116
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<pre style="margin: 0;">+<span id="LC1116" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Suppose we have (e :: ty) and we want to eta-expand it to arity N.</span></span>
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1117
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<pre style="margin: 0;">+<span id="LC1117" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This what eta_expand does. We do it in two steps:</span></span>
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1118
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<pre style="margin: 0;">+<span id="LC1118" class="line" lang="haskell"></span>
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1119
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<pre style="margin: 0;">+<span id="LC1119" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1. mkEtaWW: from 'ty' and 'N' build a [EtaInfo] which describes</span></span>
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1120
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<pre style="margin: 0;">+<span id="LC1120" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> the shape of the expansion necessary to expand to arity N.</span></span>
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1121
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<pre style="margin: 0;">+<span id="LC1121" class="line" lang="haskell"></span>
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1122
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<pre style="margin: 0;">+<span id="LC1122" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. Build the term</span></span>
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1123
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<pre style="margin: 0;">+<span id="LC1123" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> \ v1..vn. e v1 .. vn</span></span>
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1124
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<pre style="margin: 0;">+<span id="LC1124" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> where those abstractions and applications are described by</span></span>
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1125
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<pre style="margin: 0;">+<span id="LC1125" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> the same [EtaInfo]. Specifically we build the term</span></span>
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1126
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<pre style="margin: 0;">+<span id="LC1126" class="line" lang="haskell"></span>
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1127
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<pre style="margin: 0;">+<span id="LC1127" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> etaInfoAbs etas (etaInfoApp in_scope e etas)</span></span>
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1128
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<pre style="margin: 0;">+<span id="LC1128" class="line" lang="haskell"></span>
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1129
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<pre style="margin: 0;">+<span id="LC1129" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> where etas :: [EtaInfo]#</span></span>
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1130
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<pre style="margin: 0;">+<span id="LC1130" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> etaInfoAbs builds the lambdas</span></span>
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1131
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<pre style="margin: 0;">+<span id="LC1131" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> etaInfoApp builds the applictions</span></span>
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1132
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<pre style="margin: 0;">+<span id="LC1132" class="line" lang="haskell"></span>
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1133
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<pre style="margin: 0;">+<span id="LC1133" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Note that the /same/ [EtaInfo] drives both etaInfoAbs and etaInfoApp</span></span>
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1134
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<pre style="margin: 0;">+<span id="LC1134" class="line" lang="haskell"></span>
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1135
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<pre style="margin: 0;">+<span id="LC1135" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">To a first approximation [EtaInfo] is just [Var]. But</span></span>
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1136
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<pre style="margin: 0;">+<span id="LC1136" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">casts complicate the question. If we have</span></span>
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1137
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<pre style="margin: 0;">+<span id="LC1137" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> newtype N a = MkN (S -> a)</span></span>
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1138
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<pre style="margin: 0;">+<span id="LC1138" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and</span></span>
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1139
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<pre style="margin: 0;">+<span id="LC1139" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ty = N (N Int)</span></span>
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1140
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<pre style="margin: 0;">+<span id="LC1140" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">then the eta-expansion must look like</span></span>
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1141
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<pre style="margin: 0;">+<span id="LC1141" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (\x (\y. ((e |> co1) x) |> co2) y)</span></span>
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1142
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<pre style="margin: 0;">+<span id="LC1142" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> |> sym co2)</span></span>
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1143
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<pre style="margin: 0;">+<span id="LC1143" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> |> sym co1</span></span>
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1144
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<pre style="margin: 0;">+<span id="LC1144" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">where</span></span>
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1145
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<pre style="margin: 0;">+<span id="LC1145" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> co1 :: N (N Int) ~ S -> N Int</span></span>
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1146
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<pre style="margin: 0;">+<span id="LC1146" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> co2 :: N Int ~ S -> Int</span></span>
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1147
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<pre style="margin: 0;">+<span id="LC1147" class="line" lang="haskell"></span>
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1148
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<pre style="margin: 0;">+<span id="LC1148" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Blimey! Look at all those casts. Moreover, if the type</span></span>
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1149
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<pre style="margin: 0;">+<span id="LC1149" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is very deeply nested (as happens in #18223), the repetition</span></span>
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1150
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<pre style="margin: 0;">+<span id="LC1150" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of types can make the overall term very large. So there is a big</span></span>
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1151
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<pre style="margin: 0;">+<span id="LC1151" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">payoff in cancelling out casts aggressively wherever possible.</span></span>
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1152
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<pre style="margin: 0;">+<span id="LC1152" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(See also Note [No crap in eta-expanded code].)</span></span>
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1153
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<pre style="margin: 0;">+<span id="LC1153" class="line" lang="haskell"></span>
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1154
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<pre style="margin: 0;">+<span id="LC1154" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This matters a lot in etaEInfoApp, where we</span></span>
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1155
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<pre style="margin: 0;">+<span id="LC1155" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Do beta-reduction on the fly</span></span>
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1156
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<pre style="margin: 0;">+<span id="LC1156" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Use getARg_mabye to get a cast out of the way,</span></span>
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1157
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<pre style="margin: 0;">+<span id="LC1157" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> so that we can do beta reduction</span></span>
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1158
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<pre style="margin: 0;">+<span id="LC1158" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Together this makes a big difference. Consider when e is</span></span>
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1159
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<pre style="margin: 0;">+<span id="LC1159" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> case x of</span></span>
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1160
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<pre style="margin: 0;">+<span id="LC1160" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> True -> (\x -> e1) |> c1</span></span>
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1161
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<pre style="margin: 0;">+<span id="LC1161" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> False -> (\p -> e2) |> c2</span></span>
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1162
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<pre style="margin: 0;">+<span id="LC1162" class="line" lang="haskell"></span>
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1163
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<pre style="margin: 0;">+<span id="LC1163" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When we eta-expand this to arity 1, say, etaInfoAbs will wrap</span></span>
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1164
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<pre style="margin: 0;">+<span id="LC1164" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">a (\eta) around the outside and use etaInfoApp to apply each</span></span>
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1165
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<pre style="margin: 0;">+<span id="LC1165" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">alternative to 'eta'. We want to beta-reduce all that junk</span></span>
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1166
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<pre style="margin: 0;">+<span id="LC1166" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">away.</span></span>
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1167
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<pre style="margin: 0;">+<span id="LC1167" class="line" lang="haskell"></span>
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1168
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<pre style="margin: 0;">+<span id="LC1168" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">#18223 was a dramtic example in which the intermediate term was</span></span>
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1169
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<pre style="margin: 0;">+<span id="LC1169" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">grotesquely huge, even though the next Simplifier iteration squashed</span></span>
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1170
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<pre style="margin: 0;">+<span id="LC1170" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">it. Better to kill it at birth.</span></span>
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1171
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<pre style="margin: 0;">+<span id="LC1171" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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1172
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<pre style="margin: 0;">+<span id="LC1172" class="line" lang="haskell"></span>
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1094
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1173
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<pre style="margin: 0;"> <span id="LC1173" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------</span></span>
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1095
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<pre style="margin: 0;">-<span id="LC1095" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="c1" style="color: #998; font-style: italic;">-- /\a. [] [] a</span></span>
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1096
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<pre style="margin: 0;">-<span id="LC1096" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- \x. [] [] x</span></span>
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1097
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<pre style="margin: 0;">-<span id="LC1097" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="c1" style="color: #998; font-style: italic;">-- [] |> sym co [] |> co</span></span>
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1174
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<pre style="margin: 0;">+<span id="LC1174" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span> <span class="c1" style="color: #998; font-style: italic;">-- Abstraction Application</span></span>
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1175
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<pre style="margin: 0;">+<span id="LC1175" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="c1" style="color: #998; font-style: italic;">-- /\a. [] [] a</span></span>
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1176
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<pre style="margin: 0;">+<span id="LC1176" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (\x. []) [] x</span></span>
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<pre style="margin: 0;">+<span id="LC1177" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="c1" style="color: #998; font-style: italic;">-- [] |> sym co [] |> co</span></span>
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1098
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<pre style="margin: 0;"> <span id="LC1178" class="line" lang="haskell"></span>
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1179
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<pre style="margin: 0;"> <span id="LC1179" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span> <span class="kr" style="font-weight: 600;">where</span></span>
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1100
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<pre style="margin: 0;">-<span id="LC1100" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="n" style="color: #333;">v</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"EtaVar"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">v</span></span>
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1101
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<pre style="margin: 0;">-<span id="LC1101" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"EtaCo"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co</span></span>
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1180
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<pre style="margin: 0;">+<span id="LC1180" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="n" style="color: #333;">v</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"EtaVar"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">v</span><span class="p">)</span></span>
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1181
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<pre style="margin: 0;">+<span id="LC1181" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"EtaCo"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="mi" style="color: #099;">2</span> <span class="p">(</span><span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">coercionType</span> <span class="n" style="color: #333;">co</span><span class="p">))</span></span>
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1182
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<pre style="margin: 0;">+<span id="LC1182" class="line" lang="haskell"></span>
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1183
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<pre style="margin: 0;">+<span id="LC1183" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Used in debug-printing</span></span>
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1184
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<pre style="margin: 0;">+<span id="LC1184" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- pprEtaInfos :: [EtaInfo] -> SDoc</span></span>
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1185
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<pre style="margin: 0;">+<span id="LC1185" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- pprEtaInfos eis = brackets $ vcat $ punctuate comma $ map ppr eis</span></span>
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1186
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<pre style="margin: 0;"> <span id="LC1186" class="line" lang="haskell"></span>
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1103
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1187
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<pre style="margin: 0;"> <span id="LC1187" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoercion</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC1188" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Puts a EtaCo on the front of a [EtaInfo], but combining</span></span>
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<pre style="margin: 0;">+<span id="LC1189" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- with an existing EtaCo if possible</span></span>
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1190
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<pre style="margin: 0;">+<span id="LC1190" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- A minor improvement</span></span>
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1104
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1191
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<pre style="margin: 0;"> <span id="LC1191" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoercion</span> <span class="n" style="color: #333;">co1</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1105
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1192
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<pre style="margin: 0;"> <span id="LC1192" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eis</span></span>
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1106
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1193
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<pre style="margin: 0;"> <span id="LC1193" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span></span>
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1107
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1194
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<pre style="margin: 0;"> <span id="LC1194" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1108
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1195
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<pre style="margin: 0;"> <span id="LC1195" class="line" lang="haskell"> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">co1</span> <span class="p">`</span><span class="n" style="color: #333;">mkTransCo</span><span class="p">`</span> <span class="n" style="color: #333;">co2</span></span>
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1109
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1196
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<pre style="margin: 0;"> <span id="LC1196" class="line" lang="haskell"></span>
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1110
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<pre style="margin: 0;">-<span id="LC1110" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoercion</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">eis</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span></span>
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1197
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<pre style="margin: 0;">+<span id="LC1197" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoercion</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">eis</span></span>
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1198
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<pre style="margin: 0;">+<span id="LC1198" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span></span>
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1199
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<pre style="margin: 0;">+<span id="LC1199" class="line" lang="haskell"></span>
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1200
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<pre style="margin: 0;">+<span id="LC1200" class="line" lang="haskell"><span class="n" style="color: #333;">getArg_maybe</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreArg</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span><span class="p">])</span></span>
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1201
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<pre style="margin: 0;">+<span id="LC1201" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Get an argument to the front of the [EtaInfo], if possible,</span></span>
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1202
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<pre style="margin: 0;">+<span id="LC1202" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- by pushing any EtaCo through the argument</span></span>
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1203
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<pre style="margin: 0;">+<span id="LC1203" class="line" lang="haskell"><span class="n" style="color: #333;">getArg_maybe</span> <span class="n" style="color: #333;">eis</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="n" style="color: #333;">eis</span></span>
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1204
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<pre style="margin: 0;">+<span id="LC1204" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1205
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<pre style="margin: 0;">+<span id="LC1205" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreArg</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span><span class="p">])</span></span>
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1206
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<pre style="margin: 0;">+<span id="LC1206" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1207
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<pre style="margin: 0;">+<span id="LC1207" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">mco</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">mkTransMCoL</span> <span class="n" style="color: #333;">mco</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1208
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<pre style="margin: 0;">+<span id="LC1208" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">v</span><span class="p">,</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1209
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<pre style="margin: 0;">+<span id="LC1209" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1210
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<pre style="margin: 0;">+<span id="LC1210" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="n" style="color: #333;">mco</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoArg</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">v</span><span class="p">)</span></span>
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1211
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<pre style="margin: 0;">+<span id="LC1211" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mco</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1212
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<pre style="margin: 0;">+<span id="LC1212" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1213" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="n" style="color: #333;">pushCoercion</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1214
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<pre style="margin: 0;">+<span id="LC1214" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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1215
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<pre style="margin: 0;">+<span id="LC1215" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1216
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<pre style="margin: 0;">+<span id="LC1216" class="line" lang="haskell"></span>
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1217
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<pre style="margin: 0;">+<span id="LC1217" class="line" lang="haskell"><span class="n" style="color: #333;">mkCastMCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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1218
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<pre style="margin: 0;">+<span id="LC1218" class="line" lang="haskell"><span class="n" style="color: #333;">mkCastMCo</span> <span class="n" style="color: #333;">e</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">e</span></span>
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1219
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<pre style="margin: 0;">+<span id="LC1219" class="line" lang="haskell"><span class="n" style="color: #333;">mkCastMCo</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span></span>
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1220
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<pre style="margin: 0;">+<span id="LC1220" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We are careful to use (MCo co) only when co is not reflexive</span></span>
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1221
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<pre style="margin: 0;">+<span id="LC1221" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Hence (Cast e co) rather than (mkCast e co)</span></span>
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1222
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<pre style="margin: 0;">+<span id="LC1222" class="line" lang="haskell"></span>
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1223
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<pre style="margin: 0;">+<span id="LC1223" class="line" lang="haskell"><span class="n" style="color: #333;">mkPiMCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MCoercionR</span></span>
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1224
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<pre style="margin: 0;">+<span id="LC1224" class="line" lang="haskell"><span class="n" style="color: #333;">mkPiMCo</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span></span>
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1225
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<pre style="margin: 0;">+<span id="LC1225" class="line" lang="haskell"><span class="n" style="color: #333;">mkPiMCo</span> <span class="n" style="color: #333;">v</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkPiCo</span> <span class="kt" style="color: #458; font-weight: 600;">Representational</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1226
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<pre style="margin: 0;"> <span id="LC1226" class="line" lang="haskell"></span>
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1112
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1227
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<pre style="margin: 0;"> <span id="LC1227" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------</span></span>
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1113
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1228
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<pre style="margin: 0;"> <span id="LC1228" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoAbs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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1114
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<pre style="margin: 0;">-<span id="LC1114" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoAbs</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">expr</span></span>
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1115
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<pre style="margin: 0;">-<span id="LC1115" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoAbs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">v</span> <span class="p">(</span><span class="n" style="color: #333;">etaInfoAbs</span> <span class="n" style="color: #333;">eis</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span></span>
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1116
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<pre style="margin: 0;">-<span id="LC1116" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoAbs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="p">(</span><span class="n" style="color: #333;">etaInfoAbs</span> <span class="n" style="color: #333;">eis</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">mkSymCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1229" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [The EtaInfo mechanism]</span></span>
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<pre style="margin: 0;">+<span id="LC1230" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoAbs</span> <span class="n" style="color: #333;">eis</span> <span class="n" style="color: #333;">expr</span></span>
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<pre style="margin: 0;">+<span id="LC1231" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">eis</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">expr</span></span>
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1232
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<pre style="margin: 0;">+<span id="LC1232" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">final_mco</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1233
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<pre style="margin: 0;">+<span id="LC1233" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">expr'</span></span>
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1234
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<pre style="margin: 0;">+<span id="LC1234" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mkCast</span> <span class="n" style="color: #333;">expr'</span> <span class="n" style="color: #333;">co</span></span>
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1235
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<pre style="margin: 0;">+<span id="LC1235" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1236
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<pre style="margin: 0;">+<span id="LC1236" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">expr'</span><span class="p">,</span> <span class="n" style="color: #333;">final_mco</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">do_one</span> <span class="p">(</span><span class="n" style="color: #333;">split_cast</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1237
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<pre style="margin: 0;">+<span id="LC1237" class="line" lang="haskell"></span>
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1238
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<pre style="margin: 0;">+<span id="LC1238" class="line" lang="haskell"> <span class="n" style="color: #333;">do_one</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span><span class="p">)</span></span>
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1239
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<pre style="margin: 0;">+<span id="LC1239" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Implements the "Abstraction" column in the comments for data EtaInfo</span></span>
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<pre style="margin: 0;">+<span id="LC1240" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- In both argument and result the pair (e,mco) denotes (e |> mco)</span></span>
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1241
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<pre style="margin: 0;">+<span id="LC1241" class="line" lang="haskell"> <span class="n" style="color: #333;">do_one</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="n" style="color: #333;">v</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">expr</span><span class="p">,</span> <span class="n" style="color: #333;">mco</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">expr</span><span class="p">,</span> <span class="n" style="color: #333;">mkPiMCo</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">mco</span><span class="p">)</span></span>
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1242
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<pre style="margin: 0;">+<span id="LC1242" class="line" lang="haskell"> <span class="n" style="color: #333;">do_one</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">expr</span><span class="p">,</span> <span class="n" style="color: #333;">mco</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">expr</span><span class="p">,</span> <span class="n" style="color: #333;">mco</span> <span class="p">`</span><span class="n" style="color: #333;">mkTransMCoL</span><span class="p">`</span> <span class="n" style="color: #333;">mkSymCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1243
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<pre style="margin: 0;">+<span id="LC1243" class="line" lang="haskell"></span>
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1244
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<pre style="margin: 0;">+<span id="LC1244" class="line" lang="haskell"> <span class="n" style="color: #333;">split_cast</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span><span class="p">)</span></span>
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1245
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<pre style="margin: 0;">+<span id="LC1245" class="line" lang="haskell"> <span class="n" style="color: #333;">split_cast</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">e</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1246
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<pre style="margin: 0;">+<span id="LC1246" class="line" lang="haskell"> <span class="n" style="color: #333;">split_cast</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">e</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span><span class="p">)</span></span>
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1247
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<pre style="margin: 0;">+<span id="LC1247" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We could look in the body of lets, and the branches of a case</span></span>
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1248
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<pre style="margin: 0;">+<span id="LC1248" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- But then we would have to worry about whether the cast mentioned</span></span>
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1249
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<pre style="margin: 0;">+<span id="LC1249" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- any of the bound variables, which is tiresome. Later maybe.</span></span>
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1250
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<pre style="margin: 0;">+<span id="LC1250" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Result: we may end up with</span></span>
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1251
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<pre style="margin: 0;">+<span id="LC1251" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (\(x::Int). case x of { DEFAULT -> e1 |> co }) |> sym (<Int>->co)</span></span>
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1252
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<pre style="margin: 0;">+<span id="LC1252" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- and fail to optimise it away</span></span>
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1117
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1253
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<pre style="margin: 0;"> <span id="LC1253" class="line" lang="haskell"></span>
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1118
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1254
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<pre style="margin: 0;"> <span id="LC1254" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------</span></span>
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1119
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<pre style="margin: 0;">-<span id="LC1119" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoApp</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Subs</span>t</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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1255
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<pre style="margin: 0;">+<span id="LC1255" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoApp</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">InScopeSe</span>t</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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1120
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1256
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<pre style="margin: 0;"> <span id="LC1256" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (etaInfoApp s e eis) returns something equivalent to</span></span>
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1121
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<pre style="margin: 0;">-<span id="LC1121" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ((substExpr s e) `appliedto` eis)</span></span>
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1122
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<pre style="margin: 0;">-<span id="LC1122" class="line" lang="haskell"></span>
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1123
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<pre style="margin: 0;">-<span id="LC1123" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">v1</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="n" style="color: #333;">v2</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1124
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<pre style="margin: 0;">-<span id="LC1124" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">etaInfoApp</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GHC</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Subst</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">extendSubstWithVar</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">v1</span> <span class="n" style="color: #333;">v2</span><span class="p">)</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">eis</span></span>
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1125
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<pre style="margin: 0;">-<span id="LC1125" class="line" lang="haskell"></span>
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1126
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<pre style="margin: 0;">-<span id="LC1126" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co1</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1127
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<pre style="margin: 0;">-<span id="LC1127" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">pushCoercion</span> <span class="n" style="color: #333;">co'</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1128
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<pre style="margin: 0;">-<span id="LC1128" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1129
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<pre style="margin: 0;">-<span id="LC1129" class="line" lang="haskell"> <span class="n" style="color: #333;">co'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">GHC</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Subst</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substCo</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">co1</span></span>
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1257
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<pre style="margin: 0;">+<span id="LC1257" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (substExpr s e `appliedto` eis)</span></span>
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1258
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<pre style="margin: 0;">+<span id="LC1258" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [The EtaInfo mechanism]</span></span>
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1130
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1259
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<pre style="margin: 0;"> <span id="LC1259" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1131" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;"><span class="idiff left">subst</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Case</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">e</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">b</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">alts</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">eis</span></span>
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1132
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<pre style="margin: 0;">-<span id="LC1132" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Case</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">subst_expr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">subst</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">e</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">b1</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty'</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">alts'</span></span></span>
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1260
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<pre style="margin: 0;">+<span id="LC1260" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;"><span class="idiff left">in_scope</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">expr</span></span> <span class="n" style="color: #333;">eis</span></span>
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1261
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<pre style="margin: 0;">+<span id="LC1261" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">go</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">mkEmptySubst</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">in_scope</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">expr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">eis</span></span></span>
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1133
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1262
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<pre style="margin: 0;"> <span id="LC1262" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1134
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<pre style="margin: 0;">-<span id="LC1134" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">subst1</span><span class="p">,</span> <span class="n" style="color: #333;">b1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substBndr</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">b</span></span>
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1135
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<pre style="margin: 0;">-<span id="LC1135" class="line" lang="haskell"> <span class="n" style="color: #333;">alts'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">subst_alt</span> <span class="n" style="color: #333;">alts</span></span>
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1136
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<pre style="margin: 0;">-<span id="LC1136" class="line" lang="haskell"> <span class="n" style="color: #333;">ty'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">etaInfoAppTy</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GHC</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Subst</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substTy</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1137
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<pre style="margin: 0;">-<span id="LC1137" class="line" lang="haskell"> <span class="n" style="color: #333;">subst_alt</span> <span class="p">(</span><span class="n" style="color: #333;">con</span><span class="p">,</span> <span class="n" style="color: #333;">bs</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">con</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">,</span> <span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;">subst2</span> <span class="n" style="color: #333;">rhs</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1138
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<pre style="margin: 0;">-<span id="LC1138" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1139
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<pre style="margin: 0;">-<span id="LC1139" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">subst2</span><span class="p">,</span><span class="n" style="color: #333;">bs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substBndrs</span> <span class="n" style="color: #333;">subst1</span> <span class="n" style="color: #333;">bs</span></span>
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1140
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<pre style="margin: 0;">-<span id="LC1140" class="line" lang="haskell"></span>
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1141
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<pre style="margin: 0;">-<span id="LC1141" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Let</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1142
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<pre style="margin: 0;">-<span id="LC1142" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isJoinBind</span> <span class="n" style="color: #333;">b</span><span class="p">)</span></span>
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1143
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<pre style="margin: 0;">-<span id="LC1143" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Eta expansion for join points]</span></span>
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1144
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<pre style="margin: 0;">-<span id="LC1144" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Let</span> <span class="n" style="color: #333;">b'</span> <span class="p">(</span><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;">subst'</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1145
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<pre style="margin: 0;">-<span id="LC1145" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1146
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<pre style="margin: 0;">-<span id="LC1146" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">subst'</span><span class="p">,</span> <span class="n" style="color: #333;">b'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substBindSC</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">b</span></span>
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1263
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<pre style="margin: 0;">+<span id="LC1263" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Subst</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EtaInfo</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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1264
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<pre style="margin: 0;">+<span id="LC1264" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- 'go' pushed down the eta-infos into the branch of a case</span></span>
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1265
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<pre style="margin: 0;">+<span id="LC1265" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- and the body of a let; and does beta-reduction if possible</span></span>
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1266
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<pre style="margin: 0;">+<span id="LC1266" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Tick</span> <span class="n" style="color: #333;">t</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1267
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<pre style="margin: 0;">+<span id="LC1267" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Tick</span> <span class="p">(</span><span class="n" style="color: #333;">substTickish</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">t</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1268
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<pre style="margin: 0;">+<span id="LC1268" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1269
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<pre style="margin: 0;">+<span id="LC1269" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">pushCoercion</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substCo</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1270
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<pre style="margin: 0;">+<span id="LC1270" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Case</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">alts</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1271
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<pre style="margin: 0;">+<span id="LC1271" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Case</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substExprSC</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">b1</span> <span class="n" style="color: #333;">ty'</span> <span class="n" style="color: #333;">alts'</span></span>
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1272
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<pre style="margin: 0;">+<span id="LC1272" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1273
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<pre style="margin: 0;">+<span id="LC1273" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">subst1</span><span class="p">,</span> <span class="n" style="color: #333;">b1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substBndr</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">b</span></span>
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1274
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<pre style="margin: 0;">+<span id="LC1274" class="line" lang="haskell"> <span class="n" style="color: #333;">alts'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">subst_alt</span> <span class="n" style="color: #333;">alts</span></span>
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1275
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<pre style="margin: 0;">+<span id="LC1275" class="line" lang="haskell"> <span class="n" style="color: #333;">ty'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">etaInfoAppTy</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substTy</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1276
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<pre style="margin: 0;">+<span id="LC1276" class="line" lang="haskell"> <span class="n" style="color: #333;">subst_alt</span> <span class="p">(</span><span class="n" style="color: #333;">con</span><span class="p">,</span> <span class="n" style="color: #333;">bs</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">con</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">,</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">subst2</span> <span class="n" style="color: #333;">rhs</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1277
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<pre style="margin: 0;">+<span id="LC1277" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1278
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<pre style="margin: 0;">+<span id="LC1278" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">subst2</span><span class="p">,</span><span class="n" style="color: #333;">bs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substBndrs</span> <span class="n" style="color: #333;">subst1</span> <span class="n" style="color: #333;">bs</span></span>
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1279
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<pre style="margin: 0;">+<span id="LC1279" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Let</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1280
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<pre style="margin: 0;">+<span id="LC1280" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isJoinBind</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Eta expansion for join points]</span></span>
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1281
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<pre style="margin: 0;">+<span id="LC1281" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Let</span> <span class="n" style="color: #333;">b'</span> <span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">subst'</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1282
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<pre style="margin: 0;">+<span id="LC1282" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1283
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<pre style="margin: 0;">+<span id="LC1283" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">subst'</span><span class="p">,</span> <span class="n" style="color: #333;">b'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substBindSC</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">b</span></span>
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1147
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1284
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<pre style="margin: 0;"> <span id="LC1284" class="line" lang="haskell"></span>
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1148
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<pre style="margin: 0;">-<span id="LC1148" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Tick</span> <span class="n" style="color: #333;">t</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1149
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<pre style="margin: 0;">-<span id="LC1149" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Tick</span> <span class="p">(</span><span class="n" style="color: #333;">substTickish</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">t</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span></span>
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1285
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<pre style="margin: 0;">+<span id="LC1285" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Beta-reduction if possible, using getArg_maybe to push</span></span>
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1286
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<pre style="margin: 0;">+<span id="LC1286" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- any intervening casts past the argument</span></span>
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1287
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<pre style="margin: 0;">+<span id="LC1287" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [The EtaInfo mechansim]</span></span>
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1288
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<pre style="margin: 0;">+<span id="LC1288" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1289
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<pre style="margin: 0;">+<span id="LC1289" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="n" style="color: #333;">eis'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getArg_maybe</span> <span class="n" style="color: #333;">eis</span></span>
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1290
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<pre style="margin: 0;">+<span id="LC1290" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">extendSubst</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">eis'</span></span>
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1150
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1291
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<pre style="margin: 0;"> <span id="LC1291" class="line" lang="haskell"></span>
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1151
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<pre style="margin: 0;">-<span id="LC1151" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">expr</span> <span class="kr" style="font-weight: 600;">_</span></span>
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1152
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<pre style="margin: 0;">-<span id="LC1152" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">fun</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">collectArgs</span> <span class="n" style="color: #333;">expr</span></span>
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1153
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<pre style="margin: 0;">-<span id="LC1153" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">fun'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lookupIdSubst</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">fun</span></span>
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1154
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<pre style="margin: 0;">-<span id="LC1154" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isJoinId</span> <span class="n" style="color: #333;">fun'</span></span>
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1155
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<pre style="margin: 0;">-<span id="LC1155" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">subst_expr</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">expr</span></span>
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1292
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<pre style="margin: 0;">+<span id="LC1292" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Stop pushing down; just wrap the expression up</span></span>
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1293
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<pre style="margin: 0;">+<span id="LC1293" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">eis</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">wrap</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substExprSC</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1294
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<pre style="margin: 0;"> <span id="LC1294" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1157" class="line" lang="haskell"><span class="n" style="color: #333;">etaInfoApp</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">eis</span></span>
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1158
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<pre style="margin: 0;">-<span id="LC1158" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">subst_expr</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1159
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<pre style="margin: 0;">-<span id="LC1159" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1160
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<pre style="margin: 0;">-<span id="LC1160" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">e</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">e</span></span>
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1161
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<pre style="margin: 0;">-<span id="LC1161" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">App</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">v</span><span class="p">))</span> <span class="n" style="color: #333;">eis</span></span>
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1162
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<pre style="margin: 0;">-<span id="LC1162" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1295
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<pre style="margin: 0;">+<span id="LC1295" class="line" lang="haskell"> <span class="n" style="color: #333;">wrap</span> <span class="n" style="color: #333;">e</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">e</span></span>
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1296
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<pre style="margin: 0;">+<span id="LC1296" class="line" lang="haskell"> <span class="n" style="color: #333;">wrap</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">wrap</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">App</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">v</span><span class="p">))</span> <span class="n" style="color: #333;">eis</span></span>
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1297
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<pre style="margin: 0;">+<span id="LC1297" class="line" lang="haskell"> <span class="n" style="color: #333;">wrap</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EtaCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">eis</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">wrap</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="n" style="color: #333;">eis</span></span>
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1298
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<pre style="margin: 0;"> <span id="LC1298" class="line" lang="haskell"></span>
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1164
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1299
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<pre style="margin: 0;"> <span id="LC1299" class="line" lang="haskell"></span>
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1165
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1300
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<pre style="margin: 0;"> <span id="LC1300" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1235" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1235,7 +1370,7 @@ mkEtaWW orig_oss ppr_orig_expr in_scope orig_ty</td>
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1235
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1370
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<pre style="margin: 0;"> <span id="LC1370" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We want to get</span></span>
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1236
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1371
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<pre style="margin: 0;"> <span id="LC1371" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- coerce T (\x::[T] -> (coerce ([T]->Int) e) x)</span></span>
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1237
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1372
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<pre style="margin: 0;"> <span id="LC1372" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">co</span><span class="p">,</span> <span class="n" style="color: #333;">ty'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">topNormaliseNewType_maybe</span> <span class="n" style="color: #333;">ty</span></span>
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1238
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<pre style="margin: 0;">-<span id="LC1238" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">co'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Coercion</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substCo</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">co</span></span>
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1373
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<pre style="margin: 0;">+<span id="LC1373" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">co'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Type</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substCo</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">co</span></span>
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1239
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1374
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<pre style="margin: 0;"> <span id="LC1374" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Remember to apply the substitution to co (#16979)</span></span>
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<pre style="margin: 0;"> <span id="LC1375" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (or we could have applied to ty, but then</span></span>
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<pre style="margin: 0;"> <span id="LC1376" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- we'd have had to zap it for the recursive call)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1253,21 +1388,290 @@ mkEtaWW orig_oss ppr_orig_expr in_scope orig_ty</td>
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1253
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<pre style="margin: 0;"> <span id="LC1388" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- with an explicit lambda having a non-function type</span></span>
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1389
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<pre style="margin: 0;"> <span id="LC1389" class="line" lang="haskell"></span>
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1390
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<pre style="margin: 0;"> <span id="LC1390" class="line" lang="haskell"></span>
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1391
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<pre style="margin: 0;">+<span id="LC1391" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
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1392
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<pre style="margin: 0;">+<span id="LC1392" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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1393
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<pre style="margin: 0;">+<span id="LC1393" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> The "push rules"</span></span>
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1394
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<pre style="margin: 0;">+<span id="LC1394" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<pre style="margin: 0;">+<span id="LC1395" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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1256
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1396
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<pre style="margin: 0;"> <span id="LC1396" class="line" lang="haskell"></span>
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1257
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<pre style="margin: 0;">-<span id="LC1257" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------</span></span>
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1258
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<pre style="margin: 0;">-<span id="LC1258" class="line" lang="haskell"><span class="n" style="color: #333;">subst_expr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Subst</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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1259
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<pre style="margin: 0;">-<span id="LC1259" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Apply a substitution to an expression. We use substExpr</span></span>
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1260
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<pre style="margin: 0;">-<span id="LC1260" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- not substExprSC (short-cutting substitution) because</span></span>
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1261
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<pre style="margin: 0;">-<span id="LC1261" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- we may be changing the types of join points, so applying</span></span>
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1262
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<pre style="margin: 0;">-<span id="LC1262" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the in-scope set is necessary.</span></span>
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<pre style="margin: 0;">+<span id="LC1397" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Here we implement the "push rules" from FC papers:</span></span>
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1398
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<pre style="margin: 0;">+<span id="LC1398" class="line" lang="haskell"></span>
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1399
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<pre style="margin: 0;">+<span id="LC1399" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The push-argument rules, where we can move a coercion past an argument.</span></span>
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<pre style="margin: 0;">+<span id="LC1400" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> We have</span></span>
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<pre style="margin: 0;">+<span id="LC1401" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (fun |> co) arg</span></span>
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1402
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<pre style="margin: 0;">+<span id="LC1402" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> and we want to transform it to</span></span>
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<pre style="margin: 0;">+<span id="LC1403" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (fun arg') |> co'</span></span>
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<pre style="margin: 0;">+<span id="LC1404" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> for some suitable co' and transformed arg'.</span></span>
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1405
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<pre style="margin: 0;">+<span id="LC1405" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1406" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The PushK rule for data constructors. We have</span></span>
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1407
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<pre style="margin: 0;">+<span id="LC1407" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (K e1 .. en) |> co</span></span>
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1408
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<pre style="margin: 0;">+<span id="LC1408" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> and we want to transform to</span></span>
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1409
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<pre style="margin: 0;">+<span id="LC1409" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (K e1' .. en')</span></span>
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1410
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<pre style="margin: 0;">+<span id="LC1410" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> by pushing the coercion into the arguments</span></span>
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1411
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<pre style="margin: 0;">+<span id="LC1411" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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1412
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<pre style="margin: 0;">+<span id="LC1412" class="line" lang="haskell"></span>
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1413
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<pre style="margin: 0;">+<span id="LC1413" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArgs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreArg</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">CoreArg</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span><span class="p">)</span></span>
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1414
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<pre style="margin: 0;">+<span id="LC1414" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArgs</span> <span class="n" style="color: #333;">co</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1415
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<pre style="margin: 0;">+<span id="LC1415" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArgs</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">arg'</span><span class="p">,</span> <span class="n" style="color: #333;">m_co1</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoArg</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">arg</span></span>
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1416
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<pre style="margin: 0;">+<span id="LC1416" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">m_co1</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1417
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<pre style="margin: 0;">+<span id="LC1417" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co1</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">args'</span><span class="p">,</span> <span class="n" style="color: #333;">m_co2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoArgs</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">args</span></span>
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1418
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<pre style="margin: 0;">+<span id="LC1418" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">arg'</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">args'</span><span class="p">,</span> <span class="n" style="color: #333;">m_co2</span><span class="p">)</span> <span class="p">}</span></span>
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1419
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<pre style="margin: 0;">+<span id="LC1419" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">arg'</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span><span class="p">)</span> <span class="p">}</span></span>
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1420
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<pre style="margin: 0;">+<span id="LC1420" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1421" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreArg</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreArg</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1422" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We have (fun |> co) arg, and we want to transform it to</span></span>
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1423
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<pre style="margin: 0;">+<span id="LC1423" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (fun arg) |> co</span></span>
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<pre style="margin: 0;">+<span id="LC1424" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This may fail, e.g. if (fun :: N) where N is a newtype</span></span>
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1425
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<pre style="margin: 0;">+<span id="LC1425" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- C.f. simplCast in GHC.Core.Opt.Simplify</span></span>
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1426
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<pre style="margin: 0;">+<span id="LC1426" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'co' is always Representational</span></span>
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1427
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<pre style="margin: 0;">+<span id="LC1427" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If the returned coercion is Nothing, then it would have been reflexive</span></span>
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1428
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<pre style="margin: 0;">+<span id="LC1428" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArg</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">ty'</span><span class="p">,</span> <span class="n" style="color: #333;">m_co'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoTyArg</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">ty</span></span>
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1429
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<pre style="margin: 0;">+<span id="LC1429" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">ty'</span><span class="p">,</span> <span class="n" style="color: #333;">m_co'</span><span class="p">)</span> <span class="p">}</span></span>
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1430
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<pre style="margin: 0;">+<span id="LC1430" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArg</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">val_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">arg_co</span><span class="p">,</span> <span class="n" style="color: #333;">m_co'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoValArg</span> <span class="n" style="color: #333;">co</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1431" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1431
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<pre style="margin: 0;">+<span id="LC1431" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">val_arg</span> <span class="p">`</span><span class="n" style="color: #333;">mkCastMCo</span><span class="p">`</span> <span class="n" style="color: #333;">arg_co</span><span class="p">,</span> <span class="n" style="color: #333;">m_co'</span><span class="p">)</span> <span class="p">}</span></span>
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1432
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<pre style="margin: 0;">+<span id="LC1432" class="line" lang="haskell"></span>
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1433
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<pre style="margin: 0;">+<span id="LC1433" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoTyArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercionR</span><span class="p">)</span></span>
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1434
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<pre style="margin: 0;">+<span id="LC1434" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We have (fun |> co) @ty</span></span>
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1435
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<pre style="margin: 0;">+<span id="LC1435" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Push the coercion through to return</span></span>
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1436
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<pre style="margin: 0;">+<span id="LC1436" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (fun @ty') |> co'</span></span>
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1437
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<pre style="margin: 0;">+<span id="LC1437" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'co' is always Representational</span></span>
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1438
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<pre style="margin: 0;">+<span id="LC1438" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If the returned coercion is Nothing, then it would have been reflexive;</span></span>
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1439
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<pre style="margin: 0;">+<span id="LC1439" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- it's faster not to compute it, though.</span></span>
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1440
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<pre style="margin: 0;">+<span id="LC1440" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoTyArg</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">ty</span></span>
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1441
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<pre style="margin: 0;">+<span id="LC1441" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The following is inefficient - don't do `eqType` here, the coercion</span></span>
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1442
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<pre style="margin: 0;">+<span id="LC1442" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- optimizer will take care of it. See #14737.</span></span>
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1443
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<pre style="margin: 0;">+<span id="LC1443" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- -- | tyL `eqType` tyR</span></span>
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1444
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<pre style="margin: 0;">+<span id="LC1444" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- -- = Just (ty, Nothing)</span></span>
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1445
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<pre style="margin: 0;">+<span id="LC1445" class="line" lang="haskell"></span>
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1446
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<pre style="margin: 0;">+<span id="LC1446" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co</span></span>
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1447
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<pre style="margin: 0;">+<span id="LC1447" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span><span class="p">)</span></span>
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1448
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<pre style="margin: 0;">+<span id="LC1448" class="line" lang="haskell"></span>
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1449
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<pre style="margin: 0;">+<span id="LC1449" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isForAllTy_ty</span> <span class="n" style="color: #333;">tyL</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1450" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1450
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<pre style="margin: 0;">+<span id="LC1450" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">isForAllTy_ty</span> <span class="n" style="color: #333;">tyR</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span> <span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1451" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1451
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<pre style="margin: 0;">+<span id="LC1451" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span> <span class="p">`</span><span class="n" style="color: #333;">mkCastTy</span><span class="p">`</span> <span class="n" style="color: #333;">co1</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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1452
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<pre style="margin: 0;">+<span id="LC1452" class="line" lang="haskell"></span>
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1453
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<pre style="margin: 0;">+<span id="LC1453" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1454" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1454
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<pre style="margin: 0;">+<span id="LC1454" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1455
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<pre style="margin: 0;">+<span id="LC1455" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1456
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<pre style="margin: 0;">+<span id="LC1456" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">tyL</span> <span class="n" style="color: #333;">tyR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1457
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<pre style="margin: 0;">+<span id="LC1457" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co :: tyL ~ tyR</span></span>
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1458
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<pre style="margin: 0;">+<span id="LC1458" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- tyL = forall (a1 :: k1). ty1</span></span>
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1459
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<pre style="margin: 0;">+<span id="LC1459" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- tyR = forall (a2 :: k2). ty2</span></span>
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1460
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<pre style="margin: 0;">+<span id="LC1460" class="line" lang="haskell"></span>
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1461
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<pre style="margin: 0;">+<span id="LC1461" class="line" lang="haskell"> <span class="n" style="color: #333;">co1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkSymCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkNthCo</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1462
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<pre style="margin: 0;">+<span id="LC1462" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co1 :: k2 ~N k1</span></span>
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1463
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<pre style="margin: 0;">+<span id="LC1463" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Note that NthCo can extract a Nominal equality between the</span></span>
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1464
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<pre style="margin: 0;">+<span id="LC1464" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- kinds of the types related by a coercion between forall-types.</span></span>
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1465
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<pre style="margin: 0;">+<span id="LC1465" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See the NthCo case in GHC.Core.Lint.</span></span>
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1466
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<pre style="margin: 0;">+<span id="LC1466" class="line" lang="haskell"></span>
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1467
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<pre style="margin: 0;">+<span id="LC1467" class="line" lang="haskell"> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkInstCo</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">mkGReflLeftCo</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">co1</span><span class="p">)</span></span>
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1468
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<pre style="margin: 0;">+<span id="LC1468" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co2 :: ty1[ (ty|>co1)/a1 ] ~ ty2[ ty/a2 ]</span></span>
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1469
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<pre style="margin: 0;">+<span id="LC1469" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Arg of mkInstCo is always nominal, hence mkNomReflCo</span></span>
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1470
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<pre style="margin: 0;">+<span id="LC1470" class="line" lang="haskell"></span>
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1471
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<pre style="margin: 0;">+<span id="LC1471" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoValArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCoercionR</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercionR</span><span class="p">)</span></span>
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1472
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<pre style="margin: 0;">+<span id="LC1472" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We have (fun |> co) arg</span></span>
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1473
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<pre style="margin: 0;">+<span id="LC1473" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Push the coercion through to return</span></span>
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1474
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<pre style="margin: 0;">+<span id="LC1474" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (fun (arg |> co_arg)) |> co_res</span></span>
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1475
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<pre style="margin: 0;">+<span id="LC1475" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'co' is always Representational</span></span>
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1476
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<pre style="margin: 0;">+<span id="LC1476" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If the second returned Coercion is actually Nothing, then no cast is necessary;</span></span>
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1477
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<pre style="margin: 0;">+<span id="LC1477" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the returned coercion would have been reflexive.</span></span>
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1478
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<pre style="margin: 0;">+<span id="LC1478" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoValArg</span> <span class="n" style="color: #333;">co</span></span>
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1479
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<pre style="margin: 0;">+<span id="LC1479" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The following is inefficient - don't do `eqType` here, the coercion</span></span>
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1480
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<pre style="margin: 0;">+<span id="LC1480" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- optimizer will take care of it. See #14737.</span></span>
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1481
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<pre style="margin: 0;">+<span id="LC1481" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- -- | tyL `eqType` tyR</span></span>
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1482
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<pre style="margin: 0;">+<span id="LC1482" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- -- = Just (mkRepReflCo arg, Nothing)</span></span>
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1483
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<pre style="margin: 0;">+<span id="LC1483" class="line" lang="haskell"></span>
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1484
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<pre style="margin: 0;">+<span id="LC1484" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co</span></span>
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1485
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<pre style="margin: 0;">+<span id="LC1485" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MRefl</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span><span class="p">)</span></span>
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1486
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<pre style="margin: 0;">+<span id="LC1486" class="line" lang="haskell"></span>
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1487
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<pre style="margin: 0;">+<span id="LC1487" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isFunTy</span> <span class="n" style="color: #333;">tyL</span></span>
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1488
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<pre style="margin: 0;">+<span id="LC1488" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">co_mult</span><span class="p">,</span> <span class="n" style="color: #333;">co1</span><span class="p">,</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">decomposeFunCo</span> <span class="kt" style="color: #458; font-weight: 600;">Representational</span> <span class="n" style="color: #333;">co</span></span>
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1489
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<pre style="margin: 0;">+<span id="LC1489" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflexiveCo</span> <span class="n" style="color: #333;">co_mult</span></span>
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1490
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<pre style="margin: 0;">+<span id="LC1490" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We can't push the coercion in the case where co_mult isn't reflexivity:</span></span>
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1491
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<pre style="margin: 0;">+<span id="LC1491" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- it could be an unsafe axiom, and losing this information could yield</span></span>
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1492
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<pre style="margin: 0;">+<span id="LC1492" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ill-typed terms. For instance (fun x ::(1) Int -> (fun _ -> () |> co) x)</span></span>
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1493
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<pre style="margin: 0;">+<span id="LC1493" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- with co :: (Int -> ()) ~ (Int #-> ()), would reduce to (fun x ::(1) Int</span></span>
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1494
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<pre style="margin: 0;">+<span id="LC1494" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- -> (fun _ ::(Many) Int -> ()) x) which is ill-typed</span></span>
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1495
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<pre style="margin: 0;">+<span id="LC1495" class="line" lang="haskell"></span>
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1496
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<pre style="margin: 0;">+<span id="LC1496" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- If co :: (tyL1 -> tyL2) ~ (tyR1 -> tyR2)</span></span>
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1497
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<pre style="margin: 0;">+<span id="LC1497" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- then co1 :: tyL1 ~ tyR1</span></span>
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1498
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<pre style="margin: 0;">+<span id="LC1498" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co2 :: tyL2 ~ tyR2</span></span>
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1499
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<pre style="margin: 0;">+<span id="LC1499" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">isFunTy</span> <span class="n" style="color: #333;">tyR</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg</span> <span class="p">)</span></span>
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1500
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<pre style="margin: 0;">+<span id="LC1500" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">coToMCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkSymCo</span> <span class="n" style="color: #333;">co1</span><span class="p">),</span> <span class="n" style="color: #333;">coToMCo</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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1501
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<pre style="margin: 0;">+<span id="LC1501" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Critically, coToMCo to checks for ReflCo; the whole coercion may not</span></span>
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1502
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<pre style="margin: 0;">+<span id="LC1502" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- be reflexive, but either of its components might be</span></span>
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1503
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<pre style="margin: 0;">+<span id="LC1503" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We could use isReflexiveCo, but it's not clear if the benefit</span></span>
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1504
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<pre style="margin: 0;">+<span id="LC1504" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- is worth the cost, and it makes no difference in #18223</span></span>
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1505
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<pre style="margin: 0;">+<span id="LC1505" class="line" lang="haskell"></span>
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1506
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<pre style="margin: 0;">+<span id="LC1506" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1507" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1507
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<pre style="margin: 0;">+<span id="LC1507" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1508
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<pre style="margin: 0;">+<span id="LC1508" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1509
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<pre style="margin: 0;">+<span id="LC1509" class="line" lang="haskell"> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">funArgTy</span> <span class="n" style="color: #333;">tyR</span></span>
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1510
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<pre style="margin: 0;">+<span id="LC1510" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">tyL</span> <span class="n" style="color: #333;">tyR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1511
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<pre style="margin: 0;">+<span id="LC1511" class="line" lang="haskell"></span>
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1512
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<pre style="margin: 0;">+<span id="LC1512" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoercionIntoLambda</span></span>
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<pre style="margin: 0;">+<span id="LC1513" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">InScopeSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1514" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This implements the Push rule from the paper on coercions</span></span>
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<pre style="margin: 0;">+<span id="LC1515" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (\x. e) |> co</span></span>
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1516
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<pre style="margin: 0;">+<span id="LC1516" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ===></span></span>
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1517
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<pre style="margin: 0;">+<span id="LC1517" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (\x'. e |> co')</span></span>
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1518
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<pre style="margin: 0;">+<span id="LC1518" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoercionIntoLambda</span> <span class="n" style="color: #333;">in_scope</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span></span>
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1519
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<pre style="margin: 0;">+<span id="LC1519" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isTyVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isCoVar</span> <span class="n" style="color: #333;">x</span><span class="p">))</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1520" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1520
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<pre style="margin: 0;">+<span id="LC1520" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">s1s2</span> <span class="n" style="color: #333;">t1t2</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1521" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1521
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<pre style="margin: 0;">+<span id="LC1521" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">_s1</span><span class="p">,</span><span class="n" style="color: #333;">_s2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitFunTy_maybe</span> <span class="n" style="color: #333;">s1s2</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1522" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1522
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<pre style="margin: 0;">+<span id="LC1522" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">w1</span><span class="p">,</span> <span class="n" style="color: #333;">t1</span><span class="p">,</span><span class="n" style="color: #333;">_t2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitFunTy_maybe</span> <span class="n" style="color: #333;">t1t2</span></span>
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1523
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<pre style="margin: 0;">+<span id="LC1523" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">co_mult</span><span class="p">,</span> <span class="n" style="color: #333;">co1</span><span class="p">,</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">decomposeFunCo</span> <span class="kt" style="color: #458; font-weight: 600;">Representational</span> <span class="n" style="color: #333;">co</span></span>
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1524
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<pre style="margin: 0;">+<span id="LC1524" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflexiveCo</span> <span class="n" style="color: #333;">co_mult</span></span>
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<pre style="margin: 0;">+<span id="LC1525" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We can't push the coercion in the case where co_mult isn't</span></span>
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1526
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<pre style="margin: 0;">+<span id="LC1526" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- reflexivity. See pushCoValArg for more details.</span></span>
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1527
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<pre style="margin: 0;">+<span id="LC1527" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1528" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1528
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<pre style="margin: 0;">+<span id="LC1528" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Should we optimize the coercions here?</span></span>
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1529
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<pre style="margin: 0;">+<span id="LC1529" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Otherwise they might not match too well</span></span>
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1530
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<pre style="margin: 0;">+<span id="LC1530" class="line" lang="haskell"> <span class="n" style="color: #333;">x'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span> <span class="p">`</span><span class="n" style="color: #333;">setIdType</span><span class="p">`</span> <span class="n" style="color: #333;">t1</span> <span class="p">`</span><span class="n" style="color: #333;">setIdMult</span><span class="p">`</span> <span class="n" style="color: #333;">w1</span></span>
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<pre style="margin: 0;">+<span id="LC1531" class="line" lang="haskell"> <span class="n" style="color: #333;">in_scope'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">in_scope</span> <span class="p">`</span><span class="n" style="color: #333;">extendInScopeSet</span><span class="p">`</span> <span class="n" style="color: #333;">x'</span></span>
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1532
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<pre style="margin: 0;">+<span id="LC1532" class="line" lang="haskell"> <span class="n" style="color: #333;">subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendIdSubst</span> <span class="p">(</span><span class="n" style="color: #333;">mkEmptySubst</span> <span class="n" style="color: #333;">in_scope'</span><span class="p">)</span></span>
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1533
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<pre style="margin: 0;">+<span id="LC1533" class="line" lang="haskell"> <span class="n" style="color: #333;">x</span></span>
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1534
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<pre style="margin: 0;">+<span id="LC1534" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">mkCast</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">x'</span><span class="p">)</span> <span class="n" style="color: #333;">co1</span><span class="p">)</span></span>
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1535
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<pre style="margin: 0;">+<span id="LC1535" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">x'</span><span class="p">,</span> <span class="n" style="color: #333;">substExpr</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span> <span class="p">`</span><span class="n" style="color: #333;">mkCast</span><span class="p">`</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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1536
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<pre style="margin: 0;">+<span id="LC1536" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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1537
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<pre style="margin: 0;">+<span id="LC1537" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprTrace</span> <span class="s" style="color: #d14;">"exprIsLambda_maybe: Unexpected lambda in case"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span><span class="p">))</span></span>
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1538
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<pre style="margin: 0;">+<span id="LC1538" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1539
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<pre style="margin: 0;">+<span id="LC1539" class="line" lang="haskell"></span>
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1540
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<pre style="margin: 0;">+<span id="LC1540" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoDataCon</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DataCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span></span>
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1541
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<pre style="margin: 0;">+<span id="LC1541" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataCon</span></span>
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1542
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<pre style="margin: 0;">+<span id="LC1542" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Universal type args</span></span>
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1543
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<pre style="margin: 0;">+<span id="LC1543" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">])</span> <span class="c1" style="color: #998; font-style: italic;">-- All other args incl existentials</span></span>
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1544
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<pre style="margin: 0;">+<span id="LC1544" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Implement the KPush reduction rule as described in "Down with kinds"</span></span>
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1545
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<pre style="margin: 0;">+<span id="LC1545" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The transformation applies iff we have</span></span>
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1546
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<pre style="margin: 0;">+<span id="LC1546" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (C e1 ... en) `cast` co</span></span>
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1547
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<pre style="margin: 0;">+<span id="LC1547" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- where co :: (T t1 .. tn) ~ to_ty</span></span>
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1548
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<pre style="margin: 0;">+<span id="LC1548" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The left-hand one must be a T, because exprIsConApp returned True</span></span>
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1549
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<pre style="margin: 0;">+<span id="LC1549" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- but the right-hand one might not be. (Though it usually will.)</span></span>
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1550
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<pre style="margin: 0;">+<span id="LC1550" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoDataCon</span> <span class="n" style="color: #333;">dc</span> <span class="n" style="color: #333;">dc_args</span> <span class="n" style="color: #333;">co</span></span>
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1551
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<pre style="margin: 0;">+<span id="LC1551" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">from_ty</span> <span class="p">`</span><span class="n" style="color: #333;">eqType</span><span class="p">`</span> <span class="n" style="color: #333;">to_ty</span> <span class="c1" style="color: #998; font-style: italic;">-- try cheap test first</span></span>
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1552
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<pre style="margin: 0;">+<span id="LC1552" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">univ_ty_args</span><span class="p">,</span> <span class="n" style="color: #333;">rest_args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitAtList</span> <span class="p">(</span><span class="n" style="color: #333;">dataConUnivTyVars</span> <span class="n" style="color: #333;">dc</span><span class="p">)</span> <span class="n" style="color: #333;">dc_args</span></span>
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1553
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<pre style="margin: 0;">+<span id="LC1553" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">dc</span><span class="p">,</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">exprToType</span> <span class="n" style="color: #333;">univ_ty_args</span><span class="p">,</span> <span class="n" style="color: #333;">rest_args</span><span class="p">)</span></span>
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1554
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<pre style="margin: 0;">+<span id="LC1554" class="line" lang="haskell"></span>
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<td class="diff-line-num new new_line" data-linenumber="1555" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1555
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<pre style="margin: 0;">+<span id="LC1555" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">to_tc</span><span class="p">,</span> <span class="n" style="color: #333;">to_tc_arg_tys</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitTyConApp_maybe</span> <span class="n" style="color: #333;">to_ty</span></span>
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1556
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<pre style="margin: 0;">+<span id="LC1556" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">to_tc</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">dataConTyCon</span> <span class="n" style="color: #333;">dc</span></span>
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1557
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<pre style="margin: 0;">+<span id="LC1557" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- These two tests can fail; we might see</span></span>
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1558
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<pre style="margin: 0;">+<span id="LC1558" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (C x y) `cast` (g :: T a ~ S [a]),</span></span>
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1559
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<pre style="margin: 0;">+<span id="LC1559" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- where S is a type function. In fact, exprIsConApp</span></span>
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1560
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<pre style="margin: 0;">+<span id="LC1560" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- will probably not be called in such circumstances,</span></span>
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1561
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<pre style="margin: 0;">+<span id="LC1561" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- but there's nothing wrong with it</span></span>
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1562
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<pre style="margin: 0;">+<span id="LC1562" class="line" lang="haskell"></span>
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1563
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<pre style="margin: 0;">+<span id="LC1563" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span></span>
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1564
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<pre style="margin: 0;">+<span id="LC1564" class="line" lang="haskell"> <span class="n" style="color: #333;">tc_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConArity</span> <span class="n" style="color: #333;">to_tc</span></span>
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1565
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<pre style="margin: 0;">+<span id="LC1565" class="line" lang="haskell"> <span class="n" style="color: #333;">dc_univ_tyvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dataConUnivTyVars</span> <span class="n" style="color: #333;">dc</span></span>
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1566
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<pre style="margin: 0;">+<span id="LC1566" class="line" lang="haskell"> <span class="n" style="color: #333;">dc_ex_tcvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dataConExTyCoVars</span> <span class="n" style="color: #333;">dc</span></span>
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1567
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<pre style="margin: 0;">+<span id="LC1567" class="line" lang="haskell"> <span class="n" style="color: #333;">arg_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dataConRepArgTys</span> <span class="n" style="color: #333;">dc</span></span>
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1568
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<pre style="margin: 0;">+<span id="LC1568" class="line" lang="haskell"></span>
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1569
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<pre style="margin: 0;">+<span id="LC1569" class="line" lang="haskell"> <span class="n" style="color: #333;">non_univ_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dropList</span> <span class="n" style="color: #333;">dc_univ_tyvars</span> <span class="n" style="color: #333;">dc_args</span></span>
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1570
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<pre style="margin: 0;">+<span id="LC1570" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">ex_args</span><span class="p">,</span> <span class="n" style="color: #333;">val_args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitAtList</span> <span class="n" style="color: #333;">dc_ex_tcvars</span> <span class="n" style="color: #333;">non_univ_args</span></span>
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1571
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<pre style="margin: 0;">+<span id="LC1571" class="line" lang="haskell"></span>
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1572
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<pre style="margin: 0;">+<span id="LC1572" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Make the "Psi" from the paper</span></span>
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1573
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<pre style="margin: 0;">+<span id="LC1573" class="line" lang="haskell"> <span class="n" style="color: #333;">omegas</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">decomposeCo</span> <span class="n" style="color: #333;">tc_arity</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">tyConRolesRepresentational</span> <span class="n" style="color: #333;">to_tc</span><span class="p">)</span></span>
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1574
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<pre style="margin: 0;">+<span id="LC1574" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">psi_subst</span><span class="p">,</span> <span class="n" style="color: #333;">to_ex_arg_tys</span><span class="p">)</span></span>
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1575
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<pre style="margin: 0;">+<span id="LC1575" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">liftCoSubstWithEx</span> <span class="kt" style="color: #458; font-weight: 600;">Representational</span></span>
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1576
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<pre style="margin: 0;">+<span id="LC1576" class="line" lang="haskell"> <span class="n" style="color: #333;">dc_univ_tyvars</span></span>
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1577
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<pre style="margin: 0;">+<span id="LC1577" class="line" lang="haskell"> <span class="n" style="color: #333;">omegas</span></span>
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1578
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<pre style="margin: 0;">+<span id="LC1578" class="line" lang="haskell"> <span class="n" style="color: #333;">dc_ex_tcvars</span></span>
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1579
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<pre style="margin: 0;">+<span id="LC1579" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">exprToType</span> <span class="n" style="color: #333;">ex_args</span><span class="p">)</span></span>
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1580
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<pre style="margin: 0;">+<span id="LC1580" class="line" lang="haskell"></span>
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1581
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<pre style="margin: 0;">+<span id="LC1581" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Cast the value arguments (which include dictionaries)</span></span>
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1582
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<pre style="margin: 0;">+<span id="LC1582" class="line" lang="haskell"> <span class="n" style="color: #333;">new_val_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">zipWith</span> <span class="n" style="color: #333;">cast_arg</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">scaledThing</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">)</span> <span class="n" style="color: #333;">val_args</span></span>
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1583
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<pre style="margin: 0;">+<span id="LC1583" class="line" lang="haskell"> <span class="n" style="color: #333;">cast_arg</span> <span class="n" style="color: #333;">arg_ty</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkCast</span> <span class="n" style="color: #333;">arg</span> <span class="p">(</span><span class="n" style="color: #333;">psi_subst</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span></span>
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1584
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<pre style="margin: 0;">+<span id="LC1584" class="line" lang="haskell"></span>
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1585
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<pre style="margin: 0;">+<span id="LC1585" class="line" lang="haskell"> <span class="n" style="color: #333;">to_ex_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">to_ex_arg_tys</span></span>
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1586
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<pre style="margin: 0;">+<span id="LC1586" class="line" lang="haskell"></span>
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1587
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<pre style="margin: 0;">+<span id="LC1587" class="line" lang="haskell"> <span class="n" style="color: #333;">dump_doc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vcat</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">dc</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">dc_univ_tyvars</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">dc_ex_tcvars</span><span class="p">,</span></span>
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1588
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<pre style="margin: 0;">+<span id="LC1588" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">dc_args</span><span class="p">,</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1589" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1589
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<pre style="margin: 0;">+<span id="LC1589" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ex_args</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">val_args</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">from_ty</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">to_ty</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">to_tc</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1590" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1590
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<pre style="margin: 0;">+<span id="LC1590" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">to_tc</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">exprToType</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">takeList</span> <span class="n" style="color: #333;">dc_univ_tyvars</span> <span class="n" style="color: #333;">dc_args</span><span class="p">)</span> <span class="p">]</span></span>
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1591
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<pre style="margin: 0;">+<span id="LC1591" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1592" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1592
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<pre style="margin: 0;">+<span id="LC1592" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">eqType</span> <span class="n" style="color: #333;">from_ty</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">to_tc</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">exprToType</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">takeList</span> <span class="n" style="color: #333;">dc_univ_tyvars</span> <span class="n" style="color: #333;">dc_args</span><span class="p">)),</span> <span class="n" style="color: #333;">dump_doc</span> <span class="p">)</span></span>
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1593
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<pre style="margin: 0;">+<span id="LC1593" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">equalLength</span> <span class="n" style="color: #333;">val_args</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">,</span> <span class="n" style="color: #333;">dump_doc</span> <span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1594" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1594
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<pre style="margin: 0;">+<span id="LC1594" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">dc</span><span class="p">,</span> <span class="n" style="color: #333;">to_tc_arg_tys</span><span class="p">,</span> <span class="n" style="color: #333;">to_ex_args</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">new_val_args</span><span class="p">)</span></span>
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1595
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<pre style="margin: 0;">+<span id="LC1595" class="line" lang="haskell"></span>
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1596
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<pre style="margin: 0;">+<span id="LC1596" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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1597
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<pre style="margin: 0;">+<span id="LC1597" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1598
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<pre style="margin: 0;">+<span id="LC1598" class="line" lang="haskell"></span>
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1599
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<pre style="margin: 0;">+<span id="LC1599" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1600
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<pre style="margin: 0;">+<span id="LC1600" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">from_ty</span> <span class="n" style="color: #333;">to_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1601
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<pre style="margin: 0;">+<span id="LC1601" class="line" lang="haskell"></span>
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1602
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<pre style="margin: 0;">+<span id="LC1602" class="line" lang="haskell"><span class="n" style="color: #333;">collectBindersPushingCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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1603
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<pre style="margin: 0;">+<span id="LC1603" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Collect lambda binders, pushing coercions inside if possible</span></span>
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1604
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<pre style="margin: 0;">+<span id="LC1604" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- E.g. (\x.e) |> g g :: <Int> -> blah</span></span>
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1605
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<pre style="margin: 0;">+<span id="LC1605" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- = (\x. e |> Nth 1 g)</span></span>
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1606
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<pre style="margin: 0;">+<span id="LC1606" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1607
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<pre style="margin: 0;">+<span id="LC1607" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- That is,</span></span>
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1263
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1608
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<pre style="margin: 0;"> <span id="LC1608" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1264
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<pre style="margin: 0;">-<span id="LC1264" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ToDo: we could instead check if we actually *are*</span></span>
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1265
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<pre style="margin: 0;">-<span id="LC1265" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- changing any join points' types, and if not use substExprSC.</span></span>
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1266
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<pre style="margin: 0;">-<span id="LC1266" class="line" lang="haskell"><span class="n" style="color: #333;">subst_expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substExpr</span></span>
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1609
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<pre style="margin: 0;">+<span id="LC1609" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- collectBindersPushingCo ((\x.e) |> g) === ([x], e |> Nth 1 g)</span></span>
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1610
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<pre style="margin: 0;">+<span id="LC1610" class="line" lang="haskell"><span class="n" style="color: #333;">collectBindersPushingCo</span> <span class="n" style="color: #333;">e</span></span>
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1611
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<pre style="margin: 0;">+<span id="LC1611" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">e</span></span>
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1612
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<pre style="margin: 0;">+<span id="LC1612" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1613
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<pre style="margin: 0;">+<span id="LC1613" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Peel off lambdas until we hit a cast.</span></span>
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1614
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<pre style="margin: 0;">+<span id="LC1614" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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1615
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<pre style="margin: 0;">+<span id="LC1615" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The accumulator is in reverse order</span></span>
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1616
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<pre style="margin: 0;">+<span id="LC1616" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">bs</span><span class="p">)</span> <span class="n" style="color: #333;">e</span></span>
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1617
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<pre style="margin: 0;">+<span id="LC1617" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_c</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span></span>
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1618
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<pre style="margin: 0;">+<span id="LC1618" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">bs</span><span class="p">,</span> <span class="n" style="color: #333;">e</span><span class="p">)</span></span>
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1619
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<pre style="margin: 0;">+<span id="LC1619" class="line" lang="haskell"></span>
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1620
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<pre style="margin: 0;">+<span id="LC1620" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We are in a cast; peel off casts until we hit a lambda.</span></span>
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1621
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<pre style="margin: 0;">+<span id="LC1621" class="line" lang="haskell"> <span class="n" style="color: #333;">go_c</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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1622
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<pre style="margin: 0;">+<span id="LC1622" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (go_c bs e c) is same as (go bs e (e |> c))</span></span>
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1623
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<pre style="margin: 0;">+<span id="LC1623" class="line" lang="haskell"> <span class="n" style="color: #333;">go_c</span> <span class="n" style="color: #333;">bs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co1</span><span class="p">)</span> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_c</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">co1</span> <span class="p">`</span><span class="n" style="color: #333;">mkTransCo</span><span class="p">`</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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1624
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<pre style="margin: 0;">+<span id="LC1624" class="line" lang="haskell"> <span class="n" style="color: #333;">go_c</span> <span class="n" style="color: #333;">bs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_lam</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span></span>
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1625
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<pre style="margin: 0;">+<span id="LC1625" class="line" lang="haskell"> <span class="n" style="color: #333;">go_c</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">bs</span><span class="p">,</span> <span class="n" style="color: #333;">mkCast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1626
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<pre style="margin: 0;">+<span id="LC1626" class="line" lang="haskell"></span>
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1627
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<pre style="margin: 0;">+<span id="LC1627" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We are in a lambda under a cast; peel off lambdas and build a</span></span>
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1628
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<pre style="margin: 0;">+<span id="LC1628" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- new coercion for the body.</span></span>
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1629
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<pre style="margin: 0;">+<span id="LC1629" class="line" lang="haskell"> <span class="n" style="color: #333;">go_lam</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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1630
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<pre style="margin: 0;">+<span id="LC1630" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (go_lam bs b e c) is same as (go_c bs (\b.e) c)</span></span>
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1631
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<pre style="margin: 0;">+<span id="LC1631" class="line" lang="haskell"> <span class="n" style="color: #333;">go_lam</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span></span>
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1632
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<pre style="margin: 0;">+<span id="LC1632" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isTyVar</span> <span class="n" style="color: #333;">b</span></span>
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1633
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<pre style="margin: 0;">+<span id="LC1633" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">tyL</span> <span class="n" style="color: #333;">tyR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1634
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<pre style="margin: 0;">+<span id="LC1634" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">isForAllTy_ty</span> <span class="n" style="color: #333;">tyL</span> <span class="p">)</span></span>
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1635
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<pre style="margin: 0;">+<span id="LC1635" class="line" lang="haskell"> <span class="n" style="color: #333;">isForAllTy_ty</span> <span class="n" style="color: #333;">tyR</span></span>
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1636
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<pre style="margin: 0;">+<span id="LC1636" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkNthCo</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [collectBindersPushingCo]</span></span>
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1637
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<pre style="margin: 0;">+<span id="LC1637" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_c</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">bs</span><span class="p">)</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">mkInstCo</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">mkNomReflCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyVarTy</span> <span class="n" style="color: #333;">b</span><span class="p">)))</span></span>
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1638
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<pre style="margin: 0;">+<span id="LC1638" class="line" lang="haskell"></span>
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1639
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<pre style="margin: 0;">+<span id="LC1639" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isCoVar</span> <span class="n" style="color: #333;">b</span></span>
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1640
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<pre style="margin: 0;">+<span id="LC1640" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">tyL</span> <span class="n" style="color: #333;">tyR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1641
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<pre style="margin: 0;">+<span id="LC1641" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">isForAllTy_co</span> <span class="n" style="color: #333;">tyL</span> <span class="p">)</span></span>
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1642
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<pre style="margin: 0;">+<span id="LC1642" class="line" lang="haskell"> <span class="n" style="color: #333;">isForAllTy_co</span> <span class="n" style="color: #333;">tyR</span></span>
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1643
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<pre style="margin: 0;">+<span id="LC1643" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkNthCo</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [collectBindersPushingCo]</span></span>
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1644
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<pre style="margin: 0;">+<span id="LC1644" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">cov</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkCoVarCo</span> <span class="n" style="color: #333;">b</span></span>
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1645
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<pre style="margin: 0;">+<span id="LC1645" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_c</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">bs</span><span class="p">)</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">mkInstCo</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">mkNomReflCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkCoercionTy</span> <span class="n" style="color: #333;">cov</span><span class="p">)))</span></span>
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1646
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<pre style="margin: 0;">+<span id="LC1646" class="line" lang="haskell"></span>
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1647
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<pre style="margin: 0;">+<span id="LC1647" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isId</span> <span class="n" style="color: #333;">b</span></span>
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1648
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<pre style="margin: 0;">+<span id="LC1648" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">tyL</span> <span class="n" style="color: #333;">tyR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1649
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<pre style="margin: 0;">+<span id="LC1649" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">isFunTy</span> <span class="n" style="color: #333;">tyL</span><span class="p">)</span> <span class="n" style="color: #333;">isFunTy</span> <span class="n" style="color: #333;">tyR</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1650" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1650
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<pre style="margin: 0;">+<span id="LC1650" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">co_mult</span><span class="p">,</span> <span class="n" style="color: #333;">co_arg</span><span class="p">,</span> <span class="n" style="color: #333;">co_res</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">decomposeFunCo</span> <span class="kt" style="color: #458; font-weight: 600;">Representational</span> <span class="n" style="color: #333;">co</span></span>
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1651
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<pre style="margin: 0;">+<span id="LC1651" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co_mult</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [collectBindersPushingCo]</span></span>
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1652
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<pre style="margin: 0;">+<span id="LC1652" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co_arg</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [collectBindersPushingCo]</span></span>
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<pre style="margin: 0;">+<span id="LC1653" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_c</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">bs</span><span class="p">)</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co_res</span></span>
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1654
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<pre style="margin: 0;">+<span id="LC1654" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1655" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">bs</span><span class="p">,</span> <span class="n" style="color: #333;">mkCast</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1267
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1656
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<pre style="margin: 0;"> <span id="LC1656" class="line" lang="haskell"></span>
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1657
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<pre style="margin: 0;">+<span id="LC1657" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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1268
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1658
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<pre style="margin: 0;"> <span id="LC1658" class="line" lang="haskell"></span>
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1269
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<pre style="margin: 0;">-<span id="LC1269" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------</span></span>
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1659
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<pre style="margin: 0;">+<span id="LC1659" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [collectBindersPushingCo]</span></span>
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1660
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<pre style="margin: 0;">+<span id="LC1660" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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1661
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<pre style="margin: 0;">+<span id="LC1661" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We just look for coercions of form</span></span>
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1662
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<pre style="margin: 0;">+<span id="LC1662" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> <type> # w -> blah</span></span>
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1663
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<pre style="margin: 0;">+<span id="LC1663" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(and similarly for foralls) to keep this function simple. We could do</span></span>
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1664
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<pre style="margin: 0;">+<span id="LC1664" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">more elaborate stuff, but it'd involve substitution etc.</span></span>
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1665
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<pre style="margin: 0;">+<span id="LC1665" class="line" lang="haskell"></span>
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1666
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<pre style="margin: 0;">+<span id="LC1666" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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1667
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<pre style="margin: 0;">+<span id="LC1667" class="line" lang="haskell"></span>
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1668
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<pre style="margin: 0;">+<span id="LC1668" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
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1669
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<pre style="margin: 0;">+<span id="LC1669" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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1670
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<pre style="margin: 0;">+<span id="LC1670" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Join points</span></span>
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1671
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<pre style="margin: 0;">+<span id="LC1671" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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1672
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<pre style="margin: 0;">+<span id="LC1672" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">********************************************************************* -}</span></span>
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1270
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1673
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<pre style="margin: 0;"> <span id="LC1673" class="line" lang="haskell"></span>
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1674
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<pre style="margin: 0;">+<span id="LC1674" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-------------------</span></span>
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1271
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1675
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<pre style="margin: 0;"> <span id="LC1675" class="line" lang="haskell"><span class="cd">-- | Split an expression into the given number of binders and a body,</span></span>
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1676
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<pre style="margin: 0;"> <span id="LC1676" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- eta-expanding if necessary. Counts value *and* type binders.</span></span>
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<pre style="margin: 0;"> <span id="LC1677" class="line" lang="haskell"><span class="n" style="color: #333;">etaExpandToJoinPoint</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">JoinArity</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">CoreBndr</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1307,7 +1711,7 @@ etaBodyForJoinPoint need_args body</td>
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1307
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1711
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<pre style="margin: 0;"> <span id="LC1711" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">rev_bs</span><span class="p">,</span> <span class="n" style="color: #333;">e</span><span class="p">)</span></span>
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1308
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1712
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<pre style="margin: 0;"> <span id="LC1712" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">rev_bs</span> <span class="n" style="color: #333;">e</span></span>
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1309
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1713
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<pre style="margin: 0;"> <span id="LC1713" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tv</span><span class="p">,</span> <span class="n" style="color: #333;">res_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitForAllTy_maybe</span> <span class="n" style="color: #333;">ty</span></span>
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1310
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<pre style="margin: 0;">-<span id="LC1310" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">subst'</span><span class="p">,</span> <span class="n" style="color: #333;">tv'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Type</span></span><span class="o" style="font-weight: 600;"><span class="idiff right">.</span></span><span class="n" style="color: #333;">substVarBndr</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">tv</span></span>
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1714
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<pre style="margin: 0;">+<span id="LC1714" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">subst'</span><span class="p">,</span> <span class="n" style="color: #333;">tv'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substVarBndr</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">tv</span></span>
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1311
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1715
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<pre style="margin: 0;"> <span id="LC1715" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">n</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span> <span class="n" style="color: #333;">subst'</span> <span class="p">(</span><span class="n" style="color: #333;">tv'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rev_bs</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">e</span> <span class="p">`</span><span class="kt" style="color: #458; font-weight: 600;">App</span><span class="p">`</span> <span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">tv'</span><span class="p">)</span></span>
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1312
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1716
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<pre style="margin: 0;"> <span id="LC1716" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">mult</span><span class="p">,</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">,</span> <span class="n" style="color: #333;">res_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitFunTy_maybe</span> <span class="n" style="color: #333;">ty</span></span>
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1313
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1717
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<pre style="margin: 0;"> <span id="LC1717" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">subst'</span><span class="p">,</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">freshEtaId</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Scaled</span> <span class="n" style="color: #333;">mult</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1722" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1318,6 +1722,8 @@ etaBodyForJoinPoint need_args body</td>
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1318
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1722
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<pre style="margin: 0;"> <span id="LC1722" class="line" lang="haskell"></span>
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1319
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1723
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<pre style="margin: 0;"> <span id="LC1723" class="line" lang="haskell"> <span class="n" style="color: #333;">init_subst</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkEmptyTCvSubst</span> <span class="p">(</span><span class="n" style="color: #333;">mkInScopeSet</span> <span class="p">(</span><span class="n" style="color: #333;">exprFreeVars</span> <span class="n" style="color: #333;">e</span><span class="p">))</span></span>
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1320
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1724
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<pre style="margin: 0;"> <span id="LC1724" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1725" class="line" lang="haskell"></span>
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1726
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<pre style="margin: 0;">+<span id="LC1726" class="line" lang="haskell"></span>
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1321
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1727
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<pre style="margin: 0;"> <span id="LC1727" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------</span></span>
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1322
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1728
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<pre style="margin: 0;"> <span id="LC1728" class="line" lang="haskell"><span class="n" style="color: #333;">freshEtaId</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TCvSubst</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Scaled</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TCvSubst</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span><span class="p">)</span></span>
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1323
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<pre style="margin: 0;"> <span id="LC1729" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Make a fresh Id, with specified type (after applying substitution)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1336,3 +1742,4 @@ freshEtaId n subst ty</td>
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<pre style="margin: 0;"> <span id="LC1742" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- "OrCoVar" since this can be used to eta-expand</span></span>
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<pre style="margin: 0;"> <span id="LC1743" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- coercion abstractions</span></span>
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<pre style="margin: 0;"> <span id="LC1744" class="line" lang="haskell"> <span class="n" style="color: #333;">subst'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendTCvInScope</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">eta_id'</span></span>
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<pre style="margin: 0;">+<span id="LC1745" class="line" lang="haskell"></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#bd153f89bc48f3fd5079b51fb799808aacbd750c"><strong>compiler/GHC/Core/Opt/Pipeline.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -315,33 +315,38 @@ getCoreToDo dflags</td>
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<pre style="margin: 0;"> <span id="LC315" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC316" class="line" lang="haskell"> <span class="n" style="color: #333;">runWhen</span> <span class="n" style="color: #333;">do_float_in</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoFloatInwards</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC317" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC318" class="line" lang="haskell"> <span class="n" style="color: #333;">simplify</span> <span class="s" style="color: #d14;">"final"</span><span class="p">,</span> <span class="c1" style="color: #998; font-style: italic;">-- Final tidy-up</span></span>
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<pre style="margin: 0;">+<span id="LC319" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC320" class="line" lang="haskell"> <span class="n" style="color: #333;">maybe_rule_check</span> <span class="kt" style="color: #458; font-weight: 600;">FinalPhase</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC321" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC322" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-------- After this we have -O2 passes -----------------</span></span>
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<pre style="margin: 0;">+<span id="LC323" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- None of them run with -O</span></span>
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<pre style="margin: 0;">+<span id="LC324" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC325" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Case-liberation for -O2. This should be after</span></span>
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<pre style="margin: 0;"> <span id="LC326" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- strictness analysis and the simplification which follows it.</span></span>
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<pre style="margin: 0;">-<span id="LC322" class="line" lang="haskell"> <span class="n" style="color: #333;">runWhen</span> <span class="n" style="color: #333;">liberate_case</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreDoPasses</span> <span class="p">[</span></span>
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<pre style="margin: 0;">-<span id="LC323" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">CoreLiberateCase</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC324" class="line" lang="haskell"> <span class="n" style="color: #333;">simplify</span> <span class="s" style="color: #d14;">"post-liberate-case"</span></span>
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<pre style="margin: 0;">-<span id="LC325" class="line" lang="haskell"> <span class="p">]),</span> <span class="c1" style="color: #998; font-style: italic;">-- Run the simplifier after LiberateCase to vastly</span></span>
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<pre style="margin: 0;">-<span id="LC326" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- reduce the possibility of shadowing</span></span>
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<pre style="margin: 0;">-<span id="LC327" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Reason: see Note [Shadowing] in GHC.Core.Opt.SpecConstr</span></span>
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<pre style="margin: 0;">+<span id="LC327" class="line" lang="haskell"> <span class="n" style="color: #333;">runWhen</span> <span class="n" style="color: #333;">liberate_case</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoPasses</span></span>
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<pre style="margin: 0;">+<span id="LC328" class="line" lang="haskell"> <span class="p">[</span> <span class="kt" style="color: #458; font-weight: 600;">CoreLiberateCase</span><span class="p">,</span> <span class="n" style="color: #333;">simplify</span> <span class="s" style="color: #d14;">"post-liberate-case"</span> <span class="p">],</span></span>
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<pre style="margin: 0;">+<span id="LC329" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Run the simplifier after LiberateCase to vastly</span></span>
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<pre style="margin: 0;">+<span id="LC330" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- reduce the possibility of shadowing</span></span>
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<pre style="margin: 0;">+<span id="LC331" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Reason: see Note [Shadowing] in GHC.Core.Opt.SpecConstr</span></span>
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<pre style="margin: 0;"> <span id="LC332" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC329" class="line" lang="haskell"> <span class="n" style="color: #333;">runWhen</span> <span class="n" style="color: #333;">spec_constr</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoSpecConstr</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC333" class="line" lang="haskell"> <span class="n" style="color: #333;">runWhen</span> <span class="n" style="color: #333;">spec_constr</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoPasses</span></span>
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<pre style="margin: 0;">+<span id="LC334" class="line" lang="haskell"> <span class="p">[</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoSpecConstr</span><span class="p">,</span> <span class="n" style="color: #333;">simplify</span> <span class="s" style="color: #d14;">"post-spec-constr"</span><span class="p">],</span></span>
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<pre style="margin: 0;">+<span id="LC335" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Simplify after SpecConstr]</span></span>
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<pre style="margin: 0;"> <span id="LC336" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC337" class="line" lang="haskell"> <span class="n" style="color: #333;">maybe_rule_check</span> <span class="kt" style="color: #458; font-weight: 600;">FinalPhase</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC338" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC333" class="line" lang="haskell"> <span class="n" style="color: #333;">runWhen</span> <span class="n" style="color: #333;">late_specialise</span></span>
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<pre style="margin: 0;">-<span id="LC334" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreDoPasses</span> <span class="p">[</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoSpecialising</span></span>
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<pre style="margin: 0;">-<span id="LC335" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">simplify</span> <span class="s" style="color: #d14;">"post-late-spec"</span><span class="p">]),</span></span>
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<pre style="margin: 0;">+<span id="LC339" class="line" lang="haskell"> <span class="n" style="color: #333;">runWhen</span> <span class="n" style="color: #333;">late_specialise</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoPasses</span></span>
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<pre style="margin: 0;">+<span id="LC340" class="line" lang="haskell"> <span class="p">[</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoSpecialising</span><span class="p">,</span> <span class="n" style="color: #333;">simplify</span> <span class="s" style="color: #d14;">"post-late-spec"</span><span class="p">],</span></span>
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<pre style="margin: 0;"> <span id="LC341" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC342" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- LiberateCase can yield new CSE opportunities because it peels</span></span>
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<pre style="margin: 0;"> <span id="LC343" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- off one layer of a recursive function (concretely, I saw this</span></span>
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<pre style="margin: 0;"> <span id="LC344" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in wheel-sieve1), and I'm guessing that SpecConstr can too</span></span>
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<pre style="margin: 0;"> <span id="LC345" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- And CSE is a very cheap pass. So it seems worth doing here.</span></span>
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<pre style="margin: 0;">-<span id="LC341" class="line" lang="haskell"> <span class="n" style="color: #333;">runWhen</span> <span class="p">((</span><span class="n" style="color: #333;">liberate_case</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">spec_constr</span><span class="p">)</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">cse</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">CoreCSE</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC346" class="line" lang="haskell"> <span class="n" style="color: #333;">runWhen</span> <span class="p">((</span><span class="n" style="color: #333;">liberate_case</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">spec_constr</span><span class="p">)</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">cse</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoPasses</span></span>
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<pre style="margin: 0;">+<span id="LC347" class="line" lang="haskell"> <span class="p">[</span> <span class="kt" style="color: #458; font-weight: 600;">CoreCSE</span><span class="p">,</span> <span class="n" style="color: #333;">simplify</span> <span class="s" style="color: #d14;">"post-final-cse"</span> <span class="p">],</span></span>
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<pre style="margin: 0;"> <span id="LC348" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC343" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Final clean-up simplification:</span></span>
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<pre style="margin: 0;">-<span id="LC344" class="line" lang="haskell"> <span class="n" style="color: #333;">simplify</span> <span class="s" style="color: #d14;">"final"</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC349" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--------- End of -O2 passes --------------</span></span>
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<pre style="margin: 0;"> <span id="LC350" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC351" class="line" lang="haskell"> <span class="n" style="color: #333;">runWhen</span> <span class="n" style="color: #333;">late_dmd_anal</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoPasses</span> <span class="p">(</span></span>
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<pre style="margin: 0;"> <span id="LC352" class="line" lang="haskell"> <span class="n" style="color: #333;">dmd_cpr_ww</span> <span class="o" style="font-weight: 600;">++</span> <span class="p">[</span><span class="n" style="color: #333;">simplify</span> <span class="s" style="color: #d14;">"post-late-ww"</span><span class="p">]</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -410,6 +415,27 @@ or with -O0. Two reasons:</td>
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<pre style="margin: 0;"> <span id="LC415" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But watch out: list fusion can prevent floating. So use phase control</span></span>
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<pre style="margin: 0;"> <span id="LC416" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">to switch off those rules until after floating.</span></span>
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<pre style="margin: 0;"> <span id="LC417" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC418" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Simplify after SpecConstr]</span></span>
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<pre style="margin: 0;">+<span id="LC419" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">+<span id="LC420" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We want to run the simplifier after SpecConstr, and before late-Specialise,</span></span>
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<pre style="margin: 0;">+<span id="LC421" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">for two reasons, both shown up in test perf/compiler/T16473,</span></span>
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<pre style="margin: 0;">+<span id="LC422" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">with -O2 -flate-specialise</span></span>
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<pre style="margin: 0;">+<span id="LC423" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC424" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1. I found that running late-Specialise after SpecConstr, with no</span></span>
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<pre style="margin: 0;">+<span id="LC425" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> simplification in between meant that the carefullly constructed</span></span>
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<pre style="margin: 0;">+<span id="LC426" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> SpecConstr rule never got to fire. (It was something like</span></span>
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<pre style="margin: 0;">+<span id="LC427" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> lvl = f a -- Arity 1</span></span>
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428
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<pre style="margin: 0;">+<span id="LC428" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ....g lvl....</span></span>
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429
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<pre style="margin: 0;">+<span id="LC429" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> SpecConstr specialised g for argument lvl; but Specialise then</span></span>
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<pre style="margin: 0;">+<span id="LC430" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> specialised lvl = f a to lvl = $sf, and inlined. Or something like</span></span>
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431
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<pre style="margin: 0;">+<span id="LC431" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> that.)</span></span>
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432
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<pre style="margin: 0;">+<span id="LC432" class="line" lang="haskell"></span>
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433
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<pre style="margin: 0;">+<span id="LC433" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. Specialise relies on unfoldings being available for top-level dictionary</span></span>
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434
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<pre style="margin: 0;">+<span id="LC434" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> bindings; but SpecConstr kills them all! The Simplifer restores them.</span></span>
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435
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<pre style="margin: 0;">+<span id="LC435" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC436" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This extra run of the simplifier has a cost, but this is only with -O2.</span></span>
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437
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<pre style="margin: 0;">+<span id="LC437" class="line" lang="haskell"></span>
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438
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<pre style="margin: 0;">+<span id="LC438" class="line" lang="haskell"></span>
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439
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<pre style="margin: 0;"> <span id="LC439" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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414
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440
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<pre style="margin: 0;"> <span id="LC440" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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415
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<pre style="margin: 0;"> <span id="LC441" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> The CoreToDo interpreter</span></span>
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<li id="f168a93cde5e2aec2441d6331dfe500172df4af3">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#f168a93cde5e2aec2441d6331dfe500172df4af3"><strong>compiler/GHC/Core/Opt/Simplify.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -51,9 +51,9 @@ import GHC.Core.Unfold</td>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Unfold.Make</span></span>
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Utils</span></span>
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Opt.Arity</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">ArityType</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">arityTypeArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isBotArityType</span></span>
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<pre style="margin: 0;">+<span id="LC54" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoTyArg</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoValArg</span></span>
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54
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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">idArityType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpandAT</span> <span class="p">)</span></span>
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55
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<pre style="margin: 0;">-<span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.SimpleOpt</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoTyArg</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoValArg</span></span>
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56
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<pre style="margin: 0;">-<span id="LC56" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">joinPointBinding_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">joinPointBindings_maybe</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.SimpleOpt</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">joinPointBinding_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">joinPointBindings_maybe</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC57" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.FVs</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">mkRuleInfo</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Rules</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">lookupRule</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">getRules</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">initRuleOpts</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC59" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Basic</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -318,7 +318,7 @@ simplLazyBind env top_lvl is_rec bndr bndr1 rhs rhs_se</td>
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318
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<pre style="margin: 0;"> <span id="LC318" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">rhs_cont</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkRhsStop</span> <span class="p">(</span><span class="n" style="color: #333;">substTy</span> <span class="n" style="color: #333;">body_env</span> <span class="p">(</span><span class="n" style="color: #333;">exprType</span> <span class="n" style="color: #333;">body</span><span class="p">))</span></span>
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319
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<pre style="margin: 0;"> <span id="LC319" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">body_floats0</span><span class="p">,</span> <span class="n" style="color: #333;">body0</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="cp" style="color: #999; font-weight: 600;">{-#SCC "simplExprF" #-}</span> <span class="n" style="color: #333;">simplExprF</span> <span class="n" style="color: #333;">body_env</span> <span class="n" style="color: #333;">body</span> <span class="n" style="color: #333;">rhs_cont</span></span>
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<pre style="margin: 0;"> <span id="LC320" class="line" lang="haskell"></span>
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321
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<pre style="margin: 0;">-<span id="LC321" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Never float join-floats out of a non-join let-binding</span></span>
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<pre style="margin: 0;">+<span id="LC321" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Never float join-floats out of a non-join let-binding<span class="idiff left right"> (which this is)</span></span></span>
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322
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<pre style="margin: 0;"> <span id="LC322" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- So wrap the body in the join-floats right now</span></span>
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<pre style="margin: 0;"> <span id="LC323" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Hence: body_floats1 consists only of let-floats</span></span>
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<pre style="margin: 0;"> <span id="LC324" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">body_floats1</span><span class="p">,</span> <span class="n" style="color: #333;">body1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">wrapJoinFloatsX</span> <span class="n" style="color: #333;">body_floats0</span> <span class="n" style="color: #333;">body0</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1414,25 +1414,23 @@ simplCast env body co0 cont0</td>
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1414
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<pre style="margin: 0;"> <span id="LC1414" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- type of the hole changes (#16312)</span></span>
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1415
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<pre style="margin: 0;"> <span id="LC1415" class="line" lang="haskell"></span>
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1416
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<pre style="margin: 0;"> <span id="LC1416" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (f |> co) e ===> (f (e |> co1)) |> co2</span></span>
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1417
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<pre style="margin: 0;">-<span id="LC1417" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- where co :: (s1->s2) ~ (t1<span class="idiff left right">~</span>t2)</span></span>
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<pre style="margin: 0;">+<span id="LC1417" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- where co :: (s1->s2) ~ (t1<span class="idiff left right">-></span>t2)</span></span>
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1418
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<pre style="margin: 0;"> <span id="LC1418" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co1 :: t1 ~ s1</span></span>
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1419
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<pre style="margin: 0;"> <span id="LC1419" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co2 :: s2 ~ t2</span></span>
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1420
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<pre style="margin: 0;"> <span id="LC1420" class="line" lang="haskell"> <span class="n" style="color: #333;">addCoerce</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">cont</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ApplyToVal</span> <span class="p">{</span> <span class="n" style="color: #333;">sc_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="n" style="color: #333;">sc_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">arg_se</span></span>
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1421
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1421
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<pre style="margin: 0;"> <span id="LC1421" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_dup</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dup</span><span class="p">,</span> <span class="n" style="color: #333;">sc_cont</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tail</span> <span class="p">})</span></span>
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1422
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<pre style="margin: 0;">-<span id="LC1422" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">co1</span><span class="p">,</span> <span class="n" style="color: #333;">m_co2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoValArg</span> <span class="n" style="color: #333;">co</span></span>
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1423
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<pre style="margin: 0;">-<span id="LC1423" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">new_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionRKind</span> <span class="n" style="color: #333;">co1</span></span>
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1424
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<pre style="margin: 0;">-<span id="LC1424" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isTypeLevPoly</span> <span class="n" style="color: #333;">new_ty</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Without this check, we get a lev-poly arg</span></span>
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1425
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<pre style="margin: 0;">-<span id="LC1425" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Levity polymorphism invariants] in GHC.Core</span></span>
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1426
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<pre style="margin: 0;">-<span id="LC1426" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- test: typecheck/should_run/EtaExpandLevPoly</span></span>
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1422
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<pre style="margin: 0;">+<span id="LC1422" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">m_co1</span><span class="p">,</span> <span class="n" style="color: #333;">m_co2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoValArg</span> <span class="n" style="color: #333;">co</span></span>
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1423
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<pre style="margin: 0;">+<span id="LC1423" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">levity_ok</span> <span class="n" style="color: #333;">m_co1</span></span>
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1427
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1424
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<pre style="margin: 0;"> <span id="LC1424" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="cp" style="color: #999; font-weight: 600;">{-#SCC "addCoerce-pushCoValArg" #-}</span></span>
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1425
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<pre style="margin: 0;"> <span id="LC1425" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">tail'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">addCoerceM</span> <span class="n" style="color: #333;">m_co2</span> <span class="n" style="color: #333;">tail</span></span>
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1429
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<pre style="margin: 0;">-<span id="LC1429" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">if</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">isReflCo</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">co1</span></span></span>
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1430
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<pre style="margin: 0;">-<span id="LC1430" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;"><span class="idiff left right">then</span></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">cont</span> <span class="p">{</span> <span class="n" style="color: #333;">sc_cont</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tail'</span></span>
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1431
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<pre style="margin: 0;">-<span id="LC1431" class="line" lang="haskell"> <span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">sc_hole_ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">coercionLKind</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">co</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">})</span></span></span>
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1426
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<pre style="margin: 0;">+<span id="LC1426" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">case</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">m_co1</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">of</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">{</span></span></span>
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1427
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<pre style="margin: 0;">+<span id="LC1427" class="line" lang="haskell"> <span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MRefl</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">-></span></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">cont</span> <span class="p">{</span> <span class="n" style="color: #333;">sc_cont</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tail'</span></span>
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1428
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<pre style="margin: 0;">+<span id="LC1428" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">sc_hole_ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">coercionLKind</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">co</span></span><span class="idiff"> </span><span class="p"><span class="idiff">})</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">;</span></span></span>
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1432
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1429
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<pre style="margin: 0;"> <span id="LC1429" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Avoid simplifying if possible;</span></span>
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1433
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1430
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<pre style="margin: 0;"> <span id="LC1430" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Avoiding exponential behaviour]</span></span>
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1434
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<pre style="margin: 0;">-<span id="LC1434" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1435
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<pre style="margin: 0;">-<span id="LC1435" class="line" lang="haskell"> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">dup'</span><span class="p">,</span> <span class="n" style="color: #333;">arg_se'</span><span class="p">,</span> <span class="n" style="color: #333;">arg'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">simplArg</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dup</span> <span class="n" style="color: #333;">arg_se</span> <span class="n" style="color: #333;">arg</span></span>
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1431
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<pre style="margin: 0;">+<span id="LC1431" class="line" lang="haskell"></span>
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1432
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<pre style="margin: 0;">+<span id="LC1432" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co1</span> <span class="o" style="font-weight: 600;">-></span></span>
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1433
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<pre style="margin: 0;">+<span id="LC1433" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">dup'</span><span class="p">,</span> <span class="n" style="color: #333;">arg_se'</span><span class="p">,</span> <span class="n" style="color: #333;">arg'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">simplArg</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dup</span> <span class="n" style="color: #333;">arg_se</span> <span class="n" style="color: #333;">arg</span></span>
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1436
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1434
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<pre style="margin: 0;"> <span id="LC1434" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- When we build the ApplyTo we can't mix the OutCoercion</span></span>
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1437
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1435
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<pre style="margin: 0;"> <span id="LC1435" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- 'co' with the InExpr 'arg', so we simplify</span></span>
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1436
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<pre style="margin: 0;"> <span id="LC1436" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- to make it all consistent. It's a bit messy.</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1442,7 +1440,7 @@ simplCast env body co0 cont0</td>
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1442
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<pre style="margin: 0;"> <span id="LC1440" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">arg_se'</span></span>
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1443
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<pre style="margin: 0;"> <span id="LC1441" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_dup</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dup'</span></span>
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<pre style="margin: 0;"> <span id="LC1442" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_cont</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tail'</span></span>
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<pre style="margin: 0;">-<span id="LC1445" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_hole_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionLKind</span> <span class="n" style="color: #333;">co</span> <span class="p">})</span> <span class="p">}</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC1443" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sc_hole_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionLKind</span> <span class="n" style="color: #333;">co</span> <span class="p">})</span> <span class="p">}</span> <span class="p">}</span><span class="idiff left"> </span><span class="p"><span class="idiff right">}</span></span></span>
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1444
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<pre style="margin: 0;"> <span id="LC1444" class="line" lang="haskell"></span>
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1447
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<pre style="margin: 0;"> <span id="LC1445" class="line" lang="haskell"> <span class="n" style="color: #333;">addCoerce</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">cont</span></span>
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1448
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<pre style="margin: 0;"> <span id="LC1446" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isReflexiveCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">cont</span> <span class="c1" style="color: #998; font-style: italic;">-- Having this at the end makes a huge</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1450,6 +1448,13 @@ simplCast env body co0 cont0</td>
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<pre style="margin: 0;"> <span id="LC1448" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Optimising reflexivity]</span></span>
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1451
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<pre style="margin: 0;"> <span id="LC1449" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CastIt</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">cont</span><span class="p">)</span></span>
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1452
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<pre style="margin: 0;"> <span id="LC1450" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1451" class="line" lang="haskell"> <span class="n" style="color: #333;">levity_ok</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC1452" class="line" lang="haskell"> <span class="n" style="color: #333;">levity_ok</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">+<span id="LC1453" class="line" lang="haskell"> <span class="n" style="color: #333;">levity_ok</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">isTypeLevPoly</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">coercionRKind</span> <span class="n" style="color: #333;">co</span></span>
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<pre style="margin: 0;">+<span id="LC1454" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Without this check, we get a lev-poly arg</span></span>
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<pre style="margin: 0;">+<span id="LC1455" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Levity polymorphism invariants] in GHC.Core</span></span>
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1456
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<pre style="margin: 0;">+<span id="LC1456" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- test: typecheck/should_run/EtaExpandLevPoly</span></span>
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1457
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<pre style="margin: 0;">+<span id="LC1457" class="line" lang="haskell"></span>
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1453
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1458
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<pre style="margin: 0;"> <span id="LC1458" class="line" lang="haskell"><span class="n" style="color: #333;">simplArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SimplEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DupFlag</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">StaticEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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1454
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1459
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<pre style="margin: 0;"> <span id="LC1459" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SimplM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DupFlag</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">StaticEnv</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">OutExpr</span><span class="p">)</span></span>
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1455
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1460
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<pre style="margin: 0;"> <span id="LC1460" class="line" lang="haskell"><span class="n" style="color: #333;">simplArg</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dup_flag</span> <span class="n" style="color: #333;">arg_env</span> <span class="n" style="color: #333;">arg</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3119" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3114,7 +3119,7 @@ knownCon :: SimplEnv</td>
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3114
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3119
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<pre style="margin: 0;"> <span id="LC3119" class="line" lang="haskell"></span>
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3115
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3120
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<pre style="margin: 0;"> <span id="LC3120" class="line" lang="haskell"><span class="n" style="color: #333;">knownCon</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">scrut</span> <span class="n" style="color: #333;">dc_floats</span> <span class="n" style="color: #333;">dc</span> <span class="n" style="color: #333;">dc_ty_args</span> <span class="n" style="color: #333;">dc_args</span> <span class="n" style="color: #333;">bndr</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">rhs</span> <span class="n" style="color: #333;">cont</span></span>
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3116
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3121
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<pre style="margin: 0;"> <span id="LC3121" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">floats1</span><span class="p">,</span> <span class="n" style="color: #333;">env1</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">bind_args</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">dc_args</span></span>
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3117
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<pre style="margin: 0;">-<span id="LC3117" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">floats2</span><span class="p">,</span> <span class="n" style="color: #333;">env2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">bind_case_bndr</span> <span class="n" style="color: #333;">env1</span></span>
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3122
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<pre style="margin: 0;">+<span id="LC3122" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">floats2</span><span class="p">,</span> <span class="n" style="color: #333;">env2</span><span class="p">)</span> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">bind_case_bndr</span> <span class="n" style="color: #333;">env1</span></span>
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3118
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3123
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<pre style="margin: 0;"> <span id="LC3123" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">floats3</span><span class="p">,</span> <span class="n" style="color: #333;">expr'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">simplExprF</span> <span class="n" style="color: #333;">env2</span> <span class="n" style="color: #333;">rhs</span> <span class="n" style="color: #333;">cont</span></span>
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3119
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3124
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<pre style="margin: 0;"> <span id="LC3124" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dc_floats</span> <span class="kr" style="font-weight: 600;">of</span></span>
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3120
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3125
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<pre style="margin: 0;"> <span id="LC3125" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3245" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3240,6 +3245,7 @@ altsWouldDup [_] = False</td>
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3240
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3245
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<pre style="margin: 0;"> <span id="LC3245" class="line" lang="haskell"><span class="n" style="color: #333;">altsWouldDup</span> <span class="p">(</span><span class="n" style="color: #333;">alt</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">alts</span><span class="p">)</span></span>
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3241
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3246
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<pre style="margin: 0;"> <span id="LC3246" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">is_bot_alt</span> <span class="n" style="color: #333;">alt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">altsWouldDup</span> <span class="n" style="color: #333;">alts</span></span>
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3242
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3247
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<pre style="margin: 0;"> <span id="LC3247" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">all</span> <span class="n" style="color: #333;">is_bot_alt</span> <span class="n" style="color: #333;">alts</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC3248" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- otherwise case: first alt is non-bot, so all the rest must be bot</span></span>
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<pre style="margin: 0;"> <span id="LC3249" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC3250" class="line" lang="haskell"> <span class="n" style="color: #333;">is_bot_alt</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="n" style="color: #333;">rhs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprIsDeadEnd</span> <span class="n" style="color: #333;">rhs</span></span>
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<pre style="margin: 0;"> <span id="LC3251" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#2f46b19cb85e3f7b4e72305644bc50015628c41d"><strong>compiler/GHC/Core/Opt/Simplify/Env.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -596,7 +596,7 @@ addJoinFlts :: JoinFloats -> JoinFloats -> JoinFloats</td>
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<pre style="margin: 0;"> <span id="LC596" class="line" lang="haskell"><span class="n" style="color: #333;">addJoinFlts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">appOL</span></span>
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<pre style="margin: 0;"> <span id="LC597" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC598" class="line" lang="haskell"><span class="n" style="color: #333;">mkRecFloats</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SimplFloats</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SimplFloats</span></span>
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<pre style="margin: 0;">-<span id="LC599" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Flattens the floats <span class="idiff left right">from env2 </span>into a single Rec group,</span></span>
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<pre style="margin: 0;">+<span id="LC599" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Flattens the floats into a single Rec group,</span></span>
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<pre style="margin: 0;"> <span id="LC600" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- They must either all be lifted LetFloats or all JoinFloats</span></span>
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<pre style="margin: 0;"> <span id="LC601" class="line" lang="haskell"><span class="n" style="color: #333;">mkRecFloats</span> <span class="n" style="color: #333;">floats</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SimplFloats</span> <span class="p">{</span> <span class="n" style="color: #333;">sfLetFloats</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">LetFloats</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">ff</span></span>
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<pre style="margin: 0;"> <span id="LC602" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">sfJoinFloats</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">jbs</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#ab22d7ae4d245581b701367e386d7e886e416e76"><strong>compiler/GHC/Core/Opt/Specialise.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -21,22 +21,21 @@ import GHC.Tc.Utils.TcType hiding( substTy )</td>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Type</span> <span class="n" style="color: #333;">hiding</span><span class="p">(</span> <span class="n" style="color: #333;">substTy</span><span class="p">,</span> <span class="n" style="color: #333;">extendTvSubstList</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Multiplicity</span></span>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Predicate</span></span>
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<pre style="margin: 0;">-<span id="LC24" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Unit.Module</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Module</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">HasModule</span></span><span class="p"><span class="idiff">(</span></span><span class="o" style="font-weight: 600;"><span class="idiff">..</span></span><span class="p"><span class="idiff right">)</span></span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Unit.Module</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Module</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Coercion</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Opt.Monad</span></span>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">GHC.Core.Subst</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">Core</span></span>
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<pre style="margin: 0;">-<span id="LC28" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Unfold</span></span>
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Unfold.Make</span></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">isLocalVar</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Set</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Env</span></span>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core</span></span>
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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Rules</span></span>
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<pre style="margin: 0;">-<span id="LC35" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.SimpleOpt</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">collectBindersPushingCo</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC34" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Utils</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">exprIsTrivial</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">getIdFromTrivialExpr_maybe</span></span>
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<pre style="margin: 0;"> <span id="LC35" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkCast</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">exprType</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.FVs</span></span>
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<pre style="margin: 0;">-<span id="LC39" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Opt.Arity</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpandToJoinPointRule</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Opt.Arity</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">collectBindersPushingCo</span></span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpandToJoinPointRule</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC39" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.Supply</span></span>
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<pre style="margin: 0;"> <span id="LC40" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Name</span></span>
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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Id.Make</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">voidArgId</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">voidPrimId</span> <span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -53,12 +52,9 @@ import GHC.Utils.Misc</td>
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Outputable</span></span>
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Panic</span></span>
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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.FastString</span></span>
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<pre style="margin: 0;">-<span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Monad.State</span></span>
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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.DFM</span></span>
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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCo.Rep</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyCoBinder</span> <span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC57" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC60" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span></span>
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<pre style="margin: 0;">-<span id="LC61" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<pre style="margin: 0;"> <span id="LC59" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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<pre style="margin: 0;"> <span id="LC60" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -592,28 +588,29 @@ specProgram guts@(ModGuts { mg_module = this_mod</td>
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592
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588
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<pre style="margin: 0;"> <span id="LC588" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mg_binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">binds</span> <span class="p">})</span></span>
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593
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<pre style="margin: 0;"> <span id="LC589" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>
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594
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590
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<pre style="margin: 0;"> <span id="LC590" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC591" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We need to start with a Subst that knows all the things</span></span>
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<pre style="margin: 0;">+<span id="LC592" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- that are in scope, so that the substitution engine doesn't</span></span>
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<pre style="margin: 0;">+<span id="LC593" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- accidentally re-use a unique that's already in use</span></span>
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<pre style="margin: 0;">+<span id="LC594" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Easiest thing is to do it all at once, as if all the top-level</span></span>
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<pre style="margin: 0;">+<span id="LC595" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- decls were mutually recursive</span></span>
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<pre style="margin: 0;">+<span id="LC596" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">top_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SE</span> <span class="p">{</span> <span class="n" style="color: #333;">se_subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">mkEmptySubst</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkInScopeSet</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkVarSet</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC597" class="line" lang="haskell"> <span class="n" style="color: #333;">bindersOfBinds</span> <span class="n" style="color: #333;">binds</span></span>
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<pre style="margin: 0;">+<span id="LC598" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">se_interesting</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyVarSet</span></span>
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<pre style="margin: 0;">+<span id="LC599" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">se_module</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">this_mod</span></span>
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<pre style="margin: 0;">+<span id="LC600" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">se_dflags</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dflags</span> <span class="p">}</span></span>
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601
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<pre style="margin: 0;">+<span id="LC601" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC602" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">emptyUDs</span><span class="p">)</span></span>
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603
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<pre style="margin: 0;">+<span id="LC603" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">bind</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">binds</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">(</span><span class="n" style="color: #333;">binds'</span><span class="p">,</span> <span class="n" style="color: #333;">uds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">binds</span></span>
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604
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<pre style="margin: 0;">+<span id="LC604" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">bind'</span><span class="p">,</span> <span class="n" style="color: #333;">uds'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specBind</span> <span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">bind</span> <span class="n" style="color: #333;">uds</span></span>
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605
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<pre style="margin: 0;">+<span id="LC605" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">bind'</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">binds'</span><span class="p">,</span> <span class="n" style="color: #333;">uds'</span><span class="p">)</span></span>
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606
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<pre style="margin: 0;">+<span id="LC606" class="line" lang="haskell"></span>
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607
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<pre style="margin: 0;"> <span id="LC607" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Specialise the bindings of this module</span></span>
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<pre style="margin: 0;">-<span id="LC596" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">binds'</span><span class="p">,</span> <span class="n" style="color: #333;">uds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">runSpecM</span> <span class="n" style="color: #333;"><span class="idiff left">dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">this_mod</span></span><span class="idiff right"> </span><span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span></span>
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608
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<pre style="margin: 0;">+<span id="LC608" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">binds'</span><span class="p">,</span> <span class="n" style="color: #333;">uds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">runSpecM</span> <span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span></span>
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609
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<pre style="margin: 0;"> <span id="LC609" class="line" lang="haskell"></span>
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598
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<pre style="margin: 0;">-<span id="LC598" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">spec_rules</span><span class="p">,</span> <span class="n" style="color: #333;">spec_binds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specImports</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">this_mod</span> <span class="n" style="color: #333;">top_env</span></span>
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599
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<pre style="margin: 0;">-<span id="LC599" class="line" lang="haskell"> <span class="n" style="color: #333;">local_rules</span> <span class="n" style="color: #333;">uds</span></span>
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<pre style="margin: 0;">+<span id="LC610" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">spec_rules</span><span class="p">,</span> <span class="n" style="color: #333;">spec_binds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specImports</span> <span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">local_rules</span> <span class="n" style="color: #333;">uds</span></span>
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600
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<pre style="margin: 0;"> <span id="LC611" class="line" lang="haskell"></span>
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601
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<pre style="margin: 0;"> <span id="LC612" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">guts</span> <span class="p">{</span> <span class="n" style="color: #333;">mg_binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">spec_binds</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">binds'</span></span>
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602
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613
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<pre style="margin: 0;"> <span id="LC613" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mg_rules</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">spec_rules</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">local_rules</span> <span class="p">})</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC603" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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604
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<pre style="margin: 0;">-<span id="LC604" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We need to start with a Subst that knows all the things</span></span>
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605
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<pre style="margin: 0;">-<span id="LC605" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- that are in scope, so that the substitution engine doesn't</span></span>
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606
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<pre style="margin: 0;">-<span id="LC606" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- accidentally re-use a unique that's already in use</span></span>
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607
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<pre style="margin: 0;">-<span id="LC607" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Easiest thing is to do it all at once, as if all the top-level</span></span>
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608
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<pre style="margin: 0;">-<span id="LC608" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- decls were mutually recursive</span></span>
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<pre style="margin: 0;">-<span id="LC609" class="line" lang="haskell"> <span class="n" style="color: #333;">top_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SE</span> <span class="p">{</span> <span class="n" style="color: #333;">se_subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">mkEmptySubst</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkInScopeSet</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkVarSet</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC610" class="line" lang="haskell"> <span class="n" style="color: #333;">bindersOfBinds</span> <span class="n" style="color: #333;">binds</span></span>
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<pre style="margin: 0;">-<span id="LC611" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">se_interesting</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC612" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC613" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">emptyUDs</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC614" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">bind</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">binds</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">(</span><span class="n" style="color: #333;">binds'</span><span class="p">,</span> <span class="n" style="color: #333;">uds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">binds</span></span>
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<pre style="margin: 0;">-<span id="LC615" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">bind'</span><span class="p">,</span> <span class="n" style="color: #333;">uds'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specBind</span> <span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">bind</span> <span class="n" style="color: #333;">uds</span></span>
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<pre style="margin: 0;">-<span id="LC616" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">bind'</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">binds'</span><span class="p">,</span> <span class="n" style="color: #333;">uds'</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC614" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC615" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<pre style="margin: 0;"> <span id="LC616" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Wrap bindings returned by specImports]</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -643,13 +640,13 @@ See #10491</td>
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<pre style="margin: 0;"> <span id="LC640" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<pre style="margin: 0;"> <span id="LC641" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">********************************************************************* -}</span></span>
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<pre style="margin: 0;"> <span id="LC642" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC646" class="line" lang="haskell"><span class="n" style="color: #333;">specImports</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">DynFlags</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Module</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff right"> </span><span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span></span>
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<pre style="margin: 0;">+<span id="LC643" class="line" lang="haskell"><span class="n" style="color: #333;">specImports</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span></span>
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<pre style="margin: 0;"> <span id="LC644" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreRule</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC645" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span></span>
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<pre style="margin: 0;"> <span id="LC646" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreM</span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">CoreRule</span><span class="p">],</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBind</span><span class="p">])</span></span>
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<pre style="margin: 0;">-<span id="LC650" class="line" lang="haskell"><span class="n" style="color: #333;">specImports</span> <span class="n" style="color: #333;"><span class="idiff left">dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">this_mod</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">local_rules</span></span>
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<pre style="margin: 0;">+<span id="LC647" class="line" lang="haskell"><span class="n" style="color: #333;">specImports</span> <span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">local_rules</span></span>
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<pre style="margin: 0;"> <span id="LC648" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MkUD</span> <span class="p">{</span> <span class="n" style="color: #333;">ud_binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dict_binds</span><span class="p">,</span> <span class="n" style="color: #333;">ud_calls</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">calls</span> <span class="p">})</span></span>
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<pre style="margin: 0;">-<span id="LC652" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">gopt</span> <span class="kt" style="color: #458; font-weight: 600;">Opt_CrossModuleSpecialise</span> <span class="n" style="color: #333;"><span class="idiff left right">dflags</span></span></span>
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<pre style="margin: 0;">+<span id="LC649" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">gopt</span> <span class="kt" style="color: #458; font-weight: 600;">Opt_CrossModuleSpecialise</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">se_dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">top_env</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;"> <span id="LC650" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Disabling cross-module specialisation]</span></span>
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<pre style="margin: 0;"> <span id="LC651" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">wrapDictBinds</span> <span class="n" style="color: #333;">dict_binds</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC652" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -657,8 +654,7 @@ specImports dflags this_mod top_env local_rules</td>
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<pre style="margin: 0;"> <span id="LC654" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">hpt_rules</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getRuleBase</span></span>
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<pre style="margin: 0;"> <span id="LC655" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">rule_base</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendRuleBaseList</span> <span class="n" style="color: #333;">hpt_rules</span> <span class="n" style="color: #333;">local_rules</span></span>
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<pre style="margin: 0;"> <span id="LC656" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC660" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">spec_rules</span><span class="p">,</span> <span class="n" style="color: #333;">spec_binds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">spec_imports</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">this_mod</span> <span class="n" style="color: #333;">top_env</span></span>
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<pre style="margin: 0;">-<span id="LC661" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">rule_base</span></span>
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<pre style="margin: 0;">+<span id="LC657" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">spec_rules</span><span class="p">,</span> <span class="n" style="color: #333;">spec_binds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">spec_imports</span> <span class="n" style="color: #333;">top_env</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">rule_base</span></span>
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<pre style="margin: 0;"> <span id="LC658" class="line" lang="haskell"> <span class="n" style="color: #333;">dict_binds</span> <span class="n" style="color: #333;">calls</span></span>
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<pre style="margin: 0;"> <span id="LC659" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC660" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Don't forget to wrap the specialized bindings with</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -674,9 +670,7 @@ specImports dflags this_mod top_env local_rules</td>
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<pre style="margin: 0;"> <span id="LC670" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC671" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC672" class="line" lang="haskell"><span class="cd">-- | Specialise a set of calls to imported bindings</span></span>
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<pre style="margin: 0;">-<span id="LC677" class="line" lang="haskell"><span class="n" style="color: #333;">spec_imports</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span></span>
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<pre style="margin: 0;">-<span id="LC678" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Module</span></span>
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<pre style="margin: 0;">-<span id="LC679" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span> <span class="c1" style="color: #998; font-style: italic;">-- Passed in so that all top-level Ids are in scope</span></span>
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<pre style="margin: 0;">+<span id="LC673" class="line" lang="haskell"><span class="n" style="color: #333;">spec_imports</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span> <span class="c1" style="color: #998; font-style: italic;">-- Passed in so that all top-level Ids are in scope</span></span>
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<pre style="margin: 0;"> <span id="LC674" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Id</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Stack of imported functions being specialised</span></span>
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<pre style="margin: 0;"> <span id="LC675" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [specImport call stack]</span></span>
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<pre style="margin: 0;"> <span id="LC676" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RuleBase</span> <span class="c1" style="color: #998; font-style: italic;">-- Rules from this module and the home package</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -686,8 +680,7 @@ spec_imports :: DynFlags</td>
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<pre style="margin: 0;"> <span id="LC680" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CallDetails</span> <span class="c1" style="color: #998; font-style: italic;">-- Calls for imported things</span></span>
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<pre style="margin: 0;"> <span id="LC681" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreM</span> <span class="p">(</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreRule</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- New rules</span></span>
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688
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682
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<pre style="margin: 0;"> <span id="LC682" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBind</span><span class="p">]</span> <span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Specialised bindings</span></span>
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<pre style="margin: 0;">-<span id="LC689" class="line" lang="haskell"><span class="n" style="color: #333;">spec_imports</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">this_mod</span> <span class="n" style="color: #333;">top_env</span></span>
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<pre style="margin: 0;">-<span id="LC690" class="line" lang="haskell"> <span class="n" style="color: #333;">callers</span> <span class="n" style="color: #333;">rule_base</span> <span class="n" style="color: #333;">dict_binds</span> <span class="n" style="color: #333;">calls</span></span>
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<pre style="margin: 0;">+<span id="LC683" class="line" lang="haskell"><span class="n" style="color: #333;">spec_imports</span> <span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">callers</span> <span class="n" style="color: #333;">rule_base</span> <span class="n" style="color: #333;">dict_binds</span> <span class="n" style="color: #333;">calls</span></span>
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<pre style="margin: 0;"> <span id="LC684" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">import_calls</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dVarEnvElts</span> <span class="n" style="color: #333;">calls</span></span>
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692
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<pre style="margin: 0;"> <span id="LC685" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ; debugTraceMsg (text "specImports {" <+></span></span>
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686
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<pre style="margin: 0;"> <span id="LC686" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- vcat [ text "calls:" <+> ppr import_calls</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -701,16 +694,13 @@ spec_imports dflags this_mod top_env</td>
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694
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<pre style="margin: 0;"> <span id="LC694" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span></span>
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702
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695
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<pre style="margin: 0;"> <span id="LC695" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">rb</span> <span class="p">(</span><span class="n" style="color: #333;">cis</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">other_calls</span><span class="p">)</span></span>
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703
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696
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<pre style="margin: 0;"> <span id="LC696" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- debugTraceMsg (text "specImport {" <+> ppr cis)</span></span>
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704
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<pre style="margin: 0;">-<span id="LC704" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">rules1</span><span class="p">,</span> <span class="n" style="color: #333;">spec_binds1</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">spec_import</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">this_mod</span> <span class="n" style="color: #333;">top_env</span></span>
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<pre style="margin: 0;">-<span id="LC705" class="line" lang="haskell"> <span class="n" style="color: #333;">callers</span> <span class="n" style="color: #333;">rb</span> <span class="n" style="color: #333;">dict_binds</span> <span class="n" style="color: #333;">cis</span></span>
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<pre style="margin: 0;">+<span id="LC697" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">rules1</span><span class="p">,</span> <span class="n" style="color: #333;">spec_binds1</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">spec_import</span> <span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">callers</span> <span class="n" style="color: #333;">rb</span> <span class="n" style="color: #333;">dict_binds</span> <span class="n" style="color: #333;">cis</span></span>
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<pre style="margin: 0;"> <span id="LC698" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ; debugTraceMsg (text "specImport }" <+> ppr cis)</span></span>
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<pre style="margin: 0;"> <span id="LC699" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC700" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">rules2</span><span class="p">,</span> <span class="n" style="color: #333;">spec_binds2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">extendRuleBaseList</span> <span class="n" style="color: #333;">rb</span> <span class="n" style="color: #333;">rules1</span><span class="p">)</span> <span class="n" style="color: #333;">other_calls</span></span>
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<pre style="margin: 0;"> <span id="LC701" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">rules1</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">rules2</span><span class="p">,</span> <span class="n" style="color: #333;">spec_binds1</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">spec_binds2</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC702" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC711" class="line" lang="haskell"><span class="n" style="color: #333;">spec_import</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span></span>
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<pre style="margin: 0;">-<span id="LC712" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Module</span></span>
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<pre style="margin: 0;">-<span id="LC713" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span> <span class="c1" style="color: #998; font-style: italic;">-- Passed in so that all top-level Ids are in scope</span></span>
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<pre style="margin: 0;">+<span id="LC703" class="line" lang="haskell"><span class="n" style="color: #333;">spec_import</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span> <span class="c1" style="color: #998; font-style: italic;">-- Passed in so that all top-level Ids are in scope</span></span>
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<pre style="margin: 0;"> <span id="LC704" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Id</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Stack of imported functions being specialised</span></span>
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<pre style="margin: 0;"> <span id="LC705" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [specImport call stack]</span></span>
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<pre style="margin: 0;"> <span id="LC706" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RuleBase</span> <span class="c1" style="color: #998; font-style: italic;">-- Rules from this module</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -719,8 +709,7 @@ spec_import :: DynFlags</td>
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<pre style="margin: 0;"> <span id="LC709" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CallInfoSet</span> <span class="c1" style="color: #998; font-style: italic;">-- Imported function and calls for it</span></span>
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<pre style="margin: 0;"> <span id="LC710" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreM</span> <span class="p">(</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreRule</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- New rules</span></span>
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<pre style="margin: 0;"> <span id="LC711" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBind</span><span class="p">]</span> <span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Specialised bindings</span></span>
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<pre style="margin: 0;">-<span id="LC722" class="line" lang="haskell"><span class="n" style="color: #333;">spec_import</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">this_mod</span> <span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">callers</span></span>
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<pre style="margin: 0;">-<span id="LC723" class="line" lang="haskell"> <span class="n" style="color: #333;">rb</span> <span class="n" style="color: #333;">dict_binds</span> <span class="n" style="color: #333;">cis</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CIS</span> <span class="n" style="color: #333;">fn</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC712" class="line" lang="haskell"><span class="n" style="color: #333;">spec_import</span> <span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">callers</span> <span class="n" style="color: #333;">rb</span> <span class="n" style="color: #333;">dict_binds</span> <span class="n" style="color: #333;">cis</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CIS</span> <span class="n" style="color: #333;">fn</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC713" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isIn</span> <span class="s" style="color: #d14;">"specImport"</span> <span class="n" style="color: #333;">fn</span> <span class="n" style="color: #333;">callers</span></span>
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714
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<pre style="margin: 0;"> <span id="LC714" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- No warning. This actually happens all the time</span></span>
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715
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<pre style="margin: 0;"> <span id="LC715" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- when specialising a recursive function, because</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -731,8 +720,7 @@ spec_import dflags this_mod top_env callers</td>
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731
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720
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<pre style="margin: 0;"> <span id="LC720" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- debugTraceMsg (text "specImport:no valid calls")</span></span>
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721
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<pre style="margin: 0;"> <span id="LC721" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="p">}</span></span>
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733
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722
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<pre style="margin: 0;"> <span id="LC722" class="line" lang="haskell"></span>
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734
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<pre style="margin: 0;">-<span id="LC734" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">wantSpecImport</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">unfolding</span></span>
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735
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<pre style="margin: 0;">-<span id="LC735" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">rhs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">maybeUnfoldingTemplate</span> <span class="n" style="color: #333;">unfolding</span></span>
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723
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<pre style="margin: 0;">+<span id="LC723" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">rhs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">canSpecImport</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">fn</span></span>
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736
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724
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<pre style="margin: 0;"> <span id="LC724" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- Get rules from the external package state</span></span>
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737
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725
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<pre style="margin: 0;"> <span id="LC725" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We keep doing this in case we "page-fault in"</span></span>
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726
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<pre style="margin: 0;"> <span id="LC726" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- more rules as we go along</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -744,8 +732,8 @@ spec_import dflags this_mod top_env callers</td>
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732
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<pre style="margin: 0;"> <span id="LC732" class="line" lang="haskell"></span>
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733
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<pre style="margin: 0;"> <span id="LC733" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">rules1</span><span class="p">,</span> <span class="n" style="color: #333;">spec_pairs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MkUD</span> <span class="p">{</span> <span class="n" style="color: #333;">ud_binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dict_binds1</span><span class="p">,</span> <span class="n" style="color: #333;">ud_calls</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_calls</span> <span class="p">})</span></span>
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746
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734
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<pre style="margin: 0;"> <span id="LC734" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- debugTraceMsg (text "specImport1" <+> vcat [ppr fn, ppr good_calls, ppr rhs])</span></span>
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747
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<pre style="margin: 0;">-<span id="LC747" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">runSpecM</span> <span class="n" style="color: #333;"><span class="idiff left">dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">this_mod</span></span><span class="idiff right"> </span><span class="o" style="font-weight: 600;">$</span></span>
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<td class="diff-line-num old old_line" data-linenumber="748" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
748
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<pre style="margin: 0;">-<span id="LC748" class="line" lang="haskell"> <span class="n" style="color: #333;">specCalls</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Just</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">this_mod</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">rules_for_fn</span> <span class="n" style="color: #333;">good_calls</span> <span class="n" style="color: #333;">fn</span> <span class="n" style="color: #333;">rhs</span> <span class="p">}</span></span>
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735
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<pre style="margin: 0;">+<span id="LC735" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">runSpecM</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC736" class="line" lang="haskell"> <span class="n" style="color: #333;">specCalls</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">True</span></span> <span class="n" style="color: #333;">top_env</span> <span class="n" style="color: #333;">rules_for_fn</span> <span class="n" style="color: #333;">good_calls</span> <span class="n" style="color: #333;">fn</span> <span class="n" style="color: #333;">rhs</span> <span class="p">}</span></span>
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749
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<pre style="margin: 0;"> <span id="LC737" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">spec_binds1</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="p">,</span><span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">spec_pairs</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC738" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- After the rules kick in we may get recursion, but</span></span>
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<pre style="margin: 0;"> <span id="LC739" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- we rely on a global GlomBinds to sort that out later</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -753,7 +741,7 @@ spec_import dflags this_mod top_env callers</td>
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<pre style="margin: 0;"> <span id="LC741" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC742" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Now specialise any cascaded calls</span></span>
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<pre style="margin: 0;"> <span id="LC743" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ; debugTraceMsg (text "specImport 2" <+> (ppr fn $$ ppr rules1 $$ ppr spec_binds1))</span></span>
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<pre style="margin: 0;">-<span id="LC756" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">rules2</span><span class="p">,</span> <span class="n" style="color: #333;">spec_binds2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">spec_imports</span> <span class="n" style="color: #333;"><span class="idiff left">dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">this_mod</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">top_env</span></span>
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<pre style="margin: 0;">+<span id="LC744" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">rules2</span><span class="p">,</span> <span class="n" style="color: #333;">spec_binds2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">spec_imports</span> <span class="n" style="color: #333;">top_env</span></span>
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<pre style="margin: 0;"> <span id="LC745" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">fn</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">callers</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC746" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">extendRuleBaseList</span> <span class="n" style="color: #333;">rb</span> <span class="n" style="color: #333;">rules1</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC747" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">dict_binds</span> <span class="p">`</span><span class="n" style="color: #333;">unionBags</span><span class="p">`</span> <span class="n" style="color: #333;">dict_binds1</span><span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -769,11 +757,34 @@ spec_import dflags this_mod top_env callers</td>
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<pre style="margin: 0;"> <span id="LC757" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)}</span></span>
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<pre style="margin: 0;"> <span id="LC758" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC759" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC772" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">unfolding</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">realIdUnfolding</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fn</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- We want to see the unfolding even for loop breakers</span></span></span>
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<pre style="margin: 0;">+<span id="LC760" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">dflags</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">se_dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">top_env</span></span></span>
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<pre style="margin: 0;"> <span id="LC761" class="line" lang="haskell"> <span class="n" style="color: #333;">good_calls</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">filterCalls</span> <span class="n" style="color: #333;">cis</span> <span class="n" style="color: #333;">dict_binds</span></span>
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<pre style="margin: 0;"> <span id="LC762" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- SUPER IMPORTANT! Drop calls that (directly or indirectly) refer to fn</span></span>
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<pre style="margin: 0;"> <span id="LC763" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Avoiding loops in specImports]</span></span>
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<pre style="margin: 0;"> <span id="LC764" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC765" class="line" lang="haskell"><span class="n" style="color: #333;">canSpecImport</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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766
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<pre style="margin: 0;">+<span id="LC766" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialise imported INLINABLE things]</span></span>
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767
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<pre style="margin: 0;">+<span id="LC767" class="line" lang="haskell"><span class="n" style="color: #333;">canSpecImport</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">fn</span></span>
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768
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<pre style="margin: 0;">+<span id="LC768" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">CoreUnfolding</span> <span class="p">{</span> <span class="n" style="color: #333;">uf_src</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">src</span><span class="p">,</span> <span class="n" style="color: #333;">uf_tmpl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unf</span></span>
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769
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<pre style="margin: 0;">+<span id="LC769" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isStableSource</span> <span class="n" style="color: #333;">src</span></span>
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770
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<pre style="margin: 0;">+<span id="LC770" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">rhs</span> <span class="c1" style="color: #998; font-style: italic;">-- By default, specialise only imported things that have a stable</span></span>
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771
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<pre style="margin: 0;">+<span id="LC771" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- unfolding; that is, have an INLINE or INLINABLE pragma</span></span>
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772
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<pre style="margin: 0;">+<span id="LC772" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Specialise even INLINE things; it hasn't inlined yet,</span></span>
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773
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<pre style="margin: 0;">+<span id="LC773" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- so perhaps it never will. Moreover it may have calls</span></span>
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774
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<pre style="margin: 0;">+<span id="LC774" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- inside it that we want to specialise</span></span>
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775
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<pre style="margin: 0;">+<span id="LC775" class="line" lang="haskell"></span>
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776
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<pre style="margin: 0;">+<span id="LC776" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- CoreUnfolding case does /not/ include DFunUnfoldings;</span></span>
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777
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<pre style="margin: 0;">+<span id="LC777" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We only specialise DFunUnfoldings with -fspecialise-aggressively</span></span>
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778
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<pre style="margin: 0;">+<span id="LC778" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Do not specialise imported DFuns]</span></span>
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779
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<pre style="margin: 0;">+<span id="LC779" class="line" lang="haskell"></span>
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780
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<pre style="margin: 0;">+<span id="LC780" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">gopt</span> <span class="kt" style="color: #458; font-weight: 600;">Opt_SpecialiseAggressively</span> <span class="n" style="color: #333;">dflags</span></span>
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<pre style="margin: 0;">+<span id="LC781" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybeUnfoldingTemplate</span> <span class="n" style="color: #333;">unf</span> <span class="c1" style="color: #998; font-style: italic;">-- With -fspecialise-aggressively, specialise anything</span></span>
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782
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<pre style="margin: 0;">+<span id="LC782" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- with an unfolding, stable or not, DFun or not</span></span>
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783
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<pre style="margin: 0;">+<span id="LC783" class="line" lang="haskell"></span>
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784
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<pre style="margin: 0;">+<span id="LC784" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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785
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<pre style="margin: 0;">+<span id="LC785" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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786
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<pre style="margin: 0;">+<span id="LC786" class="line" lang="haskell"> <span class="n" style="color: #333;">unf</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">realIdUnfolding</span> <span class="n" style="color: #333;">fn</span> <span class="c1" style="color: #998; font-style: italic;">-- We want to see the unfolding even for loop breakers</span></span>
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787
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<pre style="margin: 0;">+<span id="LC787" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC788" class="line" lang="haskell"><span class="cd">-- | Returns whether or not to show a missed-spec warning.</span></span>
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<pre style="margin: 0;"> <span id="LC789" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If -Wall-missed-specializations is on, show the warning.</span></span>
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<pre style="margin: 0;"> <span id="LC790" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Otherwise, if -Wmissed-specializations is on, only show a warning</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -798,24 +809,47 @@ tryWarnMissingSpecs dflags callers fn calls_for_fn</td>
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<pre style="margin: 0;"> <span id="LC809" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">whenPprDebug</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"calls:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">vcat</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="n" style="color: #333;">pprCallInfo</span> <span class="n" style="color: #333;">fn</span><span class="p">)</span> <span class="n" style="color: #333;">calls_for_fn</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC810" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Probable fix: add INLINABLE pragma on"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fn</span><span class="p">)</span> <span class="p">])</span></span>
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<pre style="margin: 0;"> <span id="LC811" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC801" class="line" lang="haskell"><span class="n" style="color: #333;">wantSpecImport</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Unfolding</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">-<span id="LC802" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialise imported INLINABLE things]</span></span>
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<pre style="margin: 0;">-<span id="LC803" class="line" lang="haskell"><span class="n" style="color: #333;">wantSpecImport</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">unf</span></span>
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<pre style="margin: 0;">-<span id="LC804" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">unf</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC805" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">NoUnfolding</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;">-<span id="LC806" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">BootUnfolding</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;">-<span id="LC807" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">OtherCon</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;">-<span id="LC808" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DFunUnfolding</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">-<span id="LC809" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">CoreUnfolding</span> <span class="p">{</span> <span class="n" style="color: #333;">uf_src</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">src</span><span class="p">,</span> <span class="n" style="color: #333;">uf_guidance</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">_guidance</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC810" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">gopt</span> <span class="kt" style="color: #458; font-weight: 600;">Opt_SpecialiseAggressively</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">-<span id="LC811" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isStableSource</span> <span class="n" style="color: #333;">src</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">-<span id="LC812" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Specialise even INLINE things; it hasn't inlined yet,</span></span>
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<pre style="margin: 0;">-<span id="LC813" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- so perhaps it never will. Moreover it may have calls</span></span>
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<pre style="margin: 0;">-<span id="LC814" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- inside it that we want to specialise</span></span>
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<pre style="margin: 0;">-<span id="LC815" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="c1" style="color: #998; font-style: italic;">-- Stable, not INLINE, hence INLINABLE</span></span>
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<pre style="margin: 0;"> <span id="LC812" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC817" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Avoiding loops in specImports]</span></span>
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<pre style="margin: 0;">-<span id="LC818" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">+<span id="LC813" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC814" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Do not specialise imported DFuns]</span></span>
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<pre style="margin: 0;">+<span id="LC815" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">+<span id="LC816" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Ticket #18223 shows that specialising calls of DFuns is can cause a huge</span></span>
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<pre style="margin: 0;">+<span id="LC817" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and entirely unnecessary blowup in program size. Consider a call to</span></span>
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<pre style="margin: 0;">+<span id="LC818" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f @[[[[[[[[T]]]]]]]] d1 x</span></span>
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819
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<pre style="margin: 0;">+<span id="LC819" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">where df :: C a => C [a]</span></span>
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<pre style="margin: 0;">+<span id="LC820" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> d1 :: C [[[[[[[[T]]]]]]]] = dfC[] @[[[[[[[T]]]]]]] d1</span></span>
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821
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<pre style="margin: 0;">+<span id="LC821" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> d2 :: C [[[[[[[T]]]]]]] = dfC[] @[[[[[[T]]]]]] d3</span></span>
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<pre style="margin: 0;">+<span id="LC822" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ...</span></span>
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<pre style="margin: 0;">+<span id="LC823" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Now we'll specialise f's RHS, which may give rise to calls to 'g',</span></span>
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824
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<pre style="margin: 0;">+<span id="LC824" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">also overloaded, which we will specialise, and so on. However, if</span></span>
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<pre style="margin: 0;">+<span id="LC825" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we specialise the calls to dfC[], we'll generate specialised copies of</span></span>
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826
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<pre style="margin: 0;">+<span id="LC826" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">all methods of C, at all types; and the same for C's superclasses.</span></span>
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827
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<pre style="margin: 0;">+<span id="LC827" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC828" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">And many of these specialised functions will never be called. We are</span></span>
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829
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<pre style="margin: 0;">+<span id="LC829" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">going to call the specialised 'f', and the specialised 'g', but DFuns</span></span>
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830
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<pre style="margin: 0;">+<span id="LC830" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">group functions into a tuple, many of whose elements may never be used.</span></span>
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831
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<pre style="margin: 0;">+<span id="LC831" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC832" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">With deeply-nested types this can lead to a simply overwhelming number</span></span>
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<pre style="margin: 0;">+<span id="LC833" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of specialisations: see #18223 for a simple example (from the wild).</span></span>
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834
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<pre style="margin: 0;">+<span id="LC834" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">I measured the number of specialisations for various numbers of calls</span></span>
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835
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<pre style="margin: 0;">+<span id="LC835" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of `flip evalStateT ()`, and got this</span></span>
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836
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<pre style="margin: 0;">+<span id="LC836" class="line" lang="haskell"></span>
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837
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<pre style="margin: 0;">+<span id="LC837" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Size after one simplification</span></span>
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838
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<pre style="margin: 0;">+<span id="LC838" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> #calls #SPEC rules Terms Types</span></span>
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839
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<pre style="margin: 0;">+<span id="LC839" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> 5 56 3100 10600</span></span>
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840
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<pre style="margin: 0;">+<span id="LC840" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> 9 108 13660 77206</span></span>
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841
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<pre style="margin: 0;">+<span id="LC841" class="line" lang="haskell"></span>
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842
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<pre style="margin: 0;">+<span id="LC842" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The real tests case has 60+ calls, which blew GHC out of the water.</span></span>
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843
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<pre style="margin: 0;">+<span id="LC843" class="line" lang="haskell"></span>
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844
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<pre style="margin: 0;">+<span id="LC844" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Solution: don't specialise DFuns. The downside is that if we end</span></span>
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845
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<pre style="margin: 0;">+<span id="LC845" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">up with (h (dfun d)), /and/ we don't specialise 'h', then we won't</span></span>
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846
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<pre style="margin: 0;">+<span id="LC846" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">pass to 'h' a tuple of specialised functions.</span></span>
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847
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<pre style="margin: 0;">+<span id="LC847" class="line" lang="haskell"></span>
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848
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<pre style="margin: 0;">+<span id="LC848" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">However, the flag -fspecialise-aggressively (experimental, off by default)</span></span>
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849
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<pre style="margin: 0;">+<span id="LC849" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">allows DFuns to specialise as well.</span></span>
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850
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<pre style="margin: 0;">+<span id="LC850" class="line" lang="haskell"></span>
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851
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<pre style="margin: 0;">+<span id="LC851" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Avoiding loops in specImports]</span></span>
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852
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<pre style="margin: 0;">+<span id="LC852" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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819
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853
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<pre style="margin: 0;"> <span id="LC853" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We must take great care when specialising instance declarations</span></span>
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820
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854
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<pre style="margin: 0;"> <span id="LC854" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(functions like $fOrdList) lest we accidentally build a recursive</span></span>
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821
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855
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<pre style="margin: 0;"> <span id="LC855" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">dictionary. See Note [Avoiding loops].</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1003,6 +1037,9 @@ data SpecEnv</td>
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1003
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1037
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<pre style="margin: 0;"> <span id="LC1037" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Dict Ids that we know something about</span></span>
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1004
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1038
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<pre style="margin: 0;"> <span id="LC1038" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- and hence may be worth specialising against</span></span>
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1005
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1039
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<pre style="margin: 0;"> <span id="LC1039" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Interesting dictionary arguments]</span></span>
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1040
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<pre style="margin: 0;">+<span id="LC1040" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1041" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">se_module</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Module</span></span>
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1042
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<pre style="margin: 0;">+<span id="LC1042" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">se_dflags</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span></span>
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1006
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1043
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<pre style="margin: 0;"> <span id="LC1043" class="line" lang="haskell"> <span class="p">}</span></span>
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1007
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1044
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<pre style="margin: 0;"> <span id="LC1044" class="line" lang="haskell"></span>
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1008
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1045
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<pre style="margin: 0;"> <span id="LC1045" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1310,7 +1347,7 @@ specDefn :: SpecEnv</td>
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1310
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1347
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<pre style="margin: 0;"> <span id="LC1347" class="line" lang="haskell"><span class="n" style="color: #333;">specDefn</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">body_uds</span> <span class="n" style="color: #333;">fn</span> <span class="n" style="color: #333;">rhs</span></span>
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1311
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1348
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<pre style="margin: 0;"> <span id="LC1348" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">body_uds_without_me</span><span class="p">,</span> <span class="n" style="color: #333;">calls_for_me</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">callsForMe</span> <span class="n" style="color: #333;">fn</span> <span class="n" style="color: #333;">body_uds</span></span>
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1312
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1349
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<pre style="margin: 0;"> <span id="LC1349" class="line" lang="haskell"> <span class="n" style="color: #333;">rules_for_me</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idCoreRules</span> <span class="n" style="color: #333;">fn</span></span>
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1313
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<pre style="margin: 0;">-<span id="LC1313" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">rules</span><span class="p">,</span> <span class="n" style="color: #333;">spec_defns</span><span class="p">,</span> <span class="n" style="color: #333;">spec_uds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specCalls</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Nothing</span></span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">rules_for_me</span></span>
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1350
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<pre style="margin: 0;">+<span id="LC1350" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">rules</span><span class="p">,</span> <span class="n" style="color: #333;">spec_defns</span><span class="p">,</span> <span class="n" style="color: #333;">spec_uds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specCalls</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">False</span></span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">rules_for_me</span></span>
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1314
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1351
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<pre style="margin: 0;"> <span id="LC1351" class="line" lang="haskell"> <span class="n" style="color: #333;">calls_for_me</span> <span class="n" style="color: #333;">fn</span> <span class="n" style="color: #333;">rhs</span></span>
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1315
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1352
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<pre style="margin: 0;"> <span id="LC1352" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span> <span class="n" style="color: #333;">fn</span> <span class="p">`</span><span class="n" style="color: #333;">addIdSpecialisations</span><span class="p">`</span> <span class="n" style="color: #333;">rules</span></span>
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1316
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1353
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<pre style="margin: 0;"> <span id="LC1353" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">spec_defns</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1323,8 +1360,8 @@ specDefn env body_uds fn rhs</td>
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1323
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1360
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<pre style="margin: 0;"> <span id="LC1360" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- body_uds_without_me</span></span>
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1324
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1361
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<pre style="margin: 0;"> <span id="LC1361" class="line" lang="haskell"></span>
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1325
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1362
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<pre style="margin: 0;"> <span id="LC1362" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">---------------------------</span></span>
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1326
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<pre style="margin: 0;">-<span id="LC1326" class="line" lang="haskell"><span class="n" style="color: #333;">specCalls</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Maybe</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Module</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- Just this_mod</span> => specialising imported fn</span></span>
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<pre style="margin: 0;">-<span id="LC1327" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">Nothing </span> => specialising local fn</span></span>
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1363
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<pre style="margin: 0;">+<span id="LC1363" class="line" lang="haskell"><span class="n" style="color: #333;">specCalls</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Bool</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- True</span> => specialising imported fn</span></span>
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1364
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<pre style="margin: 0;">+<span id="LC1364" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">False</span> => specialising local fn</span></span>
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1328
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1365
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<pre style="margin: 0;"> <span id="LC1365" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span></span>
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1329
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1366
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<pre style="margin: 0;"> <span id="LC1366" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreRule</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Existing RULES for the fn</span></span>
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1330
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1367
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<pre style="margin: 0;"> <span id="LC1367" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CallInfo</span><span class="p">]</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1339" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1376" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1339,7 +1376,7 @@ type SpecInfo = ( [CoreRule] -- Specialisation rules</td>
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1339
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1376
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<pre style="margin: 0;"> <span id="LC1376" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Id</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)]</span> <span class="c1" style="color: #998; font-style: italic;">-- Specialised definition</span></span>
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1340
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1377
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<pre style="margin: 0;"> <span id="LC1377" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span> <span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Usage details from specialised RHSs</span></span>
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1341
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1378
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<pre style="margin: 0;"> <span id="LC1378" class="line" lang="haskell"></span>
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1342
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<pre style="margin: 0;">-<span id="LC1342" class="line" lang="haskell"><span class="n" style="color: #333;">specCalls</span> <span class="n" style="color: #333;"><span class="idiff left right">mb_mod</span></span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">existing_rules</span> <span class="n" style="color: #333;">calls_for_me</span> <span class="n" style="color: #333;">fn</span> <span class="n" style="color: #333;">rhs</span></span>
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1379
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<pre style="margin: 0;">+<span id="LC1379" class="line" lang="haskell"><span class="n" style="color: #333;">specCalls</span> <span class="n" style="color: #333;"><span class="idiff left right">spec_imp</span></span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">existing_rules</span> <span class="n" style="color: #333;">calls_for_me</span> <span class="n" style="color: #333;">fn</span> <span class="n" style="color: #333;">rhs</span></span>
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1343
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1380
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<pre style="margin: 0;"> <span id="LC1380" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The first case is the interesting one</span></span>
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1344
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1381
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<pre style="margin: 0;"> <span id="LC1381" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">notNull</span> <span class="n" style="color: #333;">calls_for_me</span> <span class="c1" style="color: #998; font-style: italic;">-- And there are some calls to specialise</span></span>
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1345
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<pre style="margin: 0;"> <span id="LC1382" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isNeverActive</span> <span class="p">(</span><span class="n" style="color: #333;">idInlineActivation</span> <span class="n" style="color: #333;">fn</span><span class="p">))</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1370" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1407" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1370,7 +1407,9 @@ specCalls mb_mod env existing_rules calls_for_me fn rhs</td>
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1370
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1407
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<pre style="margin: 0;"> <span id="LC1407" class="line" lang="haskell"> <span class="n" style="color: #333;">inl_act</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">inlinePragmaActivation</span> <span class="n" style="color: #333;">inl_prag</span></span>
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1371
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<pre style="margin: 0;"> <span id="LC1408" class="line" lang="haskell"> <span class="n" style="color: #333;">is_local</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isLocalId</span> <span class="n" style="color: #333;">fn</span></span>
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1372
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1409
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<pre style="margin: 0;"> <span id="LC1409" class="line" lang="haskell"> <span class="n" style="color: #333;">is_dfun</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isDFunId</span> <span class="n" style="color: #333;">fn</span></span>
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1373
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<pre style="margin: 0;">-<span id="LC1373" class="line" lang="haskell"></span>
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1410
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<pre style="margin: 0;">+<span id="LC1410" class="line" lang="haskell"> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">se_dflags</span> <span class="n" style="color: #333;">env</span></span>
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<pre style="margin: 0;">+<span id="LC1411" class="line" lang="haskell"> <span class="n" style="color: #333;">ropts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">initRuleOpts</span> <span class="n" style="color: #333;">dflags</span></span>
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1412
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<pre style="margin: 0;">+<span id="LC1412" class="line" lang="haskell"> <span class="n" style="color: #333;">this_mod</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">se_module</span> <span class="n" style="color: #333;">env</span></span>
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1374
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1413
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<pre style="margin: 0;"> <span id="LC1413" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Figure out whether the function has an INLINE pragma</span></span>
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1375
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1414
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<pre style="margin: 0;"> <span id="LC1414" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Inline specialisations]</span></span>
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1376
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1415
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<pre style="margin: 0;"> <span id="LC1415" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1451" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1412,8 +1451,6 @@ specCalls mb_mod env existing_rules calls_for_me fn rhs</td>
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1412
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1451
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<pre style="margin: 0;"> <span id="LC1451" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , ppr dx_binds ]) $</span></span>
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1413
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1452
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<pre style="margin: 0;"> <span id="LC1452" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- return ()</span></span>
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1414
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1453
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<pre style="margin: 0;"> <span id="LC1453" class="line" lang="haskell"></span>
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1415
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<pre style="margin: 0;">-<span id="LC1415" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>
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1416
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<pre style="margin: 0;">-<span id="LC1416" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ropts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">initRuleOpts</span> <span class="n" style="color: #333;">dflags</span></span>
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1417
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1454
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<pre style="margin: 0;"> <span id="LC1454" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">useful</span> <span class="c1" style="color: #998; font-style: italic;">-- No useful specialisation</span></span>
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1418
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1455
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<pre style="margin: 0;"> <span id="LC1455" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">already_covered</span> <span class="n" style="color: #333;">ropts</span> <span class="n" style="color: #333;">rules_acc</span> <span class="n" style="color: #333;">rule_lhs_args</span></span>
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1419
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1456
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<pre style="margin: 0;"> <span id="LC1456" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">spec_acc</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1441" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1478" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1441,17 +1478,15 @@ specCalls mb_mod env existing_rules calls_for_me fn rhs</td>
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1441
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1478
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<pre style="margin: 0;"> <span id="LC1478" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1442
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1479
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<pre style="margin: 0;"> <span id="LC1479" class="line" lang="haskell"></span>
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1443
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1480
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<pre style="margin: 0;"> <span id="LC1480" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">spec_fn</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newSpecIdSM</span> <span class="n" style="color: #333;">fn</span> <span class="n" style="color: #333;">spec_fn_ty</span> <span class="n" style="color: #333;">spec_join_arity</span></span>
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1444
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<pre style="margin: 0;">-<span id="LC1444" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">this_mod</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getModule</span></span>
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1445
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1481
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<pre style="margin: 0;"> <span id="LC1481" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span></span>
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1446
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1482
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<pre style="margin: 0;"> <span id="LC1482" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The rule to put in the function's specialisation is:</span></span>
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1447
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1483
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<pre style="margin: 0;"> <span id="LC1483" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- forall x @b d1' d2'.</span></span>
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1448
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1484
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<pre style="margin: 0;"> <span id="LC1484" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- f x @T1 @b @T2 d1' d2' = f1 x @b</span></span>
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1449
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1485
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<pre style="margin: 0;"> <span id="LC1485" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialising Calls]</span></span>
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1450
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<pre style="margin: 0;">-<span id="LC1450" class="line" lang="haskell"> <span class="n" style="color: #333;">herald</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mb_mod</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC1451" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="c1" style="color: #998; font-style: italic;">-- Specialising local fn</span></span>
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<pre style="margin: 0;">-<span id="LC1452" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"SPEC"</span></span>
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1453
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<pre style="margin: 0;">-<span id="LC1453" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">this_mod</span> <span class="c1" style="color: #998; font-style: italic;">-- Specialising imported fn</span></span>
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1454
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<pre style="margin: 0;">-<span id="LC1454" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"SPEC/"</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">this_mod</span></span>
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<pre style="margin: 0;">+<span id="LC1486" class="line" lang="haskell"> <span class="n" style="color: #333;">herald</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">spec_imp</span> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- Specialising imported fn</span></span>
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1487
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<pre style="margin: 0;">+<span id="LC1487" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"SPEC/"</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">this_mod</span></span>
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1488
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<pre style="margin: 0;">+<span id="LC1488" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- Specialising local fn</span></span>
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<pre style="margin: 0;">+<span id="LC1489" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"SPEC"</span></span>
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1455
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1490
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<pre style="margin: 0;"> <span id="LC1490" class="line" lang="haskell"></span>
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1456
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1491
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<pre style="margin: 0;"> <span id="LC1491" class="line" lang="haskell"> <span class="n" style="color: #333;">rule_name</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkFastString</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">showSDoc</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">$</span></span>
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1492
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<pre style="margin: 0;"> <span id="LC1492" class="line" lang="haskell"> <span class="n" style="color: #333;">herald</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ftext</span> <span class="p">(</span><span class="n" style="color: #333;">occNameFS</span> <span class="p">(</span><span class="n" style="color: #333;">getOccName</span> <span class="n" style="color: #333;">fn</span><span class="p">))</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2480,15 +2515,15 @@ mkCallUDs env f args</td>
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2480
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2515
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<pre style="margin: 0;"> <span id="LC2515" class="line" lang="haskell"> <span class="n" style="color: #333;">res</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkCallUDs'</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">args</span></span>
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2481
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2516
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<pre style="margin: 0;"> <span id="LC2516" class="line" lang="haskell"></span>
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2482
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<pre style="margin: 0;"> <span id="LC2517" class="line" lang="haskell"><span class="n" style="color: #333;">mkCallUDs'</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">args</span></span>
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2483
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<pre style="margin: 0;">-<span id="LC2483" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">want_calls_for</span> <span class="n" style="color: #333;">f</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Imported from elsewhere</span></span>
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2484
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<pre style="margin: 0;">-<span id="LC2484" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">ci_key</span> <span class="c1" style="color: #998; font-style: italic;">-- No useful specialisation</span></span>
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2485
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<pre style="margin: 0;">-<span id="LC2485" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See also Note [Specialisations already covered]</span></span>
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2518
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<pre style="margin: 0;">+<span id="LC2518" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">wantCallsFor</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">f</span> <span class="c1" style="color: #998; font-style: italic;">-- We want it, and...</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2519" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
2519
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<pre style="margin: 0;">+<span id="LC2519" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">ci_key</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- this call site has a useful specialisation</span></span>
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<pre style="margin: 0;">+<span id="LC2520" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "mkCallUDs: keeping" _trace_doc</span></span>
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<pre style="margin: 0;">+<span id="LC2521" class="line" lang="haskell"> <span class="n" style="color: #333;">singleCall</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">ci_key</span></span>
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2522
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<pre style="margin: 0;">+<span id="LC2522" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC2523" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="c1" style="color: #998; font-style: italic;">-- See also Note [Specialisations already covered]</span></span>
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2486
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2524
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<pre style="margin: 0;"> <span id="LC2524" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "mkCallUDs: discarding" _trace_doc</span></span>
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2487
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2525
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<pre style="margin: 0;"> <span id="LC2525" class="line" lang="haskell"> <span class="n" style="color: #333;">emptyUDs</span></span>
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2488
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2526
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<pre style="margin: 0;"> <span id="LC2526" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2489" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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2490
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<pre style="margin: 0;">-<span id="LC2490" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "mkCallUDs: keeping" _trace_doc</span></span>
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<pre style="margin: 0;">-<span id="LC2491" class="line" lang="haskell"> <span class="n" style="color: #333;">singleCall</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">ci_key</span></span>
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2492
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2527
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<pre style="margin: 0;"> <span id="LC2527" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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2493
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2528
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<pre style="margin: 0;"> <span id="LC2528" class="line" lang="haskell"> <span class="n" style="color: #333;">_trace_doc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vcat</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">f</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ci_key</span><span class="p">]</span></span>
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2529
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<pre style="margin: 0;"> <span id="LC2529" class="line" lang="haskell"> <span class="n" style="color: #333;">pis</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fst</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">splitPiTys</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">f</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2525,12 +2560,23 @@ mkCallUDs' env f args</td>
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2560
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<pre style="margin: 0;"> <span id="LC2560" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_spec_arg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Anon</span> <span class="kt" style="color: #458; font-weight: 600;">VisArg</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span></span>
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2526
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<pre style="margin: 0;"> <span id="LC2561" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecArg</span></span>
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2562
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<pre style="margin: 0;"> <span id="LC2562" class="line" lang="haskell"></span>
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2528
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<pre style="margin: 0;">-<span id="LC2528" class="line" lang="haskell"> <span class="n" style="color: #333;">want_calls_for</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isLocalId</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">isJust</span> <span class="p">(</span><span class="n" style="color: #333;">maybeUnfoldingTemplate</span> <span class="p">(</span><span class="n" style="color: #333;">realIdUnfolding</span> <span class="n" style="color: #333;">f</span><span class="p">))</span></span>
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2529
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<pre style="margin: 0;">-<span id="LC2529" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- For imported things, we gather call instances if</span></span>
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2530
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<pre style="margin: 0;">-<span id="LC2530" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- there is an unfolding that we could in principle specialise</span></span>
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2531
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<pre style="margin: 0;">-<span id="LC2531" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We might still decide not to use it (consulting dflags)</span></span>
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2532
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<pre style="margin: 0;">-<span id="LC2532" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in specImports</span></span>
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<pre style="margin: 0;">-<span id="LC2533" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Use 'realIdUnfolding' to ignore the loop-breaker flag!</span></span>
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<pre style="margin: 0;">+<span id="LC2563" class="line" lang="haskell"><span class="n" style="color: #333;">wantCallsFor</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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2564
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<pre style="margin: 0;">+<span id="LC2564" class="line" lang="haskell"><span class="n" style="color: #333;">wantCallsFor</span> <span class="n" style="color: #333;">_env</span> <span class="n" style="color: #333;">_f</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2565" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
2565
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<pre style="margin: 0;">+<span id="LC2565" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We could reduce the size of the UsageDetails by being less eager</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2566" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
2566
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<pre style="margin: 0;">+<span id="LC2566" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- about collecting calls for LocalIds: there is no point for</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2567" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
2567
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<pre style="margin: 0;">+<span id="LC2567" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ones that are lambda-bound. We can't decide this by looking at</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2568" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
2568
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<pre style="margin: 0;">+<span id="LC2568" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- the (absence of an) unfolding, because unfoldings for local</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2569" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
2569
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<pre style="margin: 0;">+<span id="LC2569" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- functions are discarded by cloneBindSM, so no local binder will</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2570" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
2570
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<pre style="margin: 0;">+<span id="LC2570" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- have an unfolding at this stage. We'd have to keep a candidate</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2571" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
2571
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<pre style="margin: 0;">+<span id="LC2571" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- set of let-binders.</span></span>
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2572
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<pre style="margin: 0;">+<span id="LC2572" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--</span></span>
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2573
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<pre style="margin: 0;">+<span id="LC2573" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Not many lambda-bound variables have dictionary arguments, so</span></span>
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2574
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<pre style="margin: 0;">+<span id="LC2574" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- this would make little difference anyway.</span></span>
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2575
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<pre style="margin: 0;">+<span id="LC2575" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--</span></span>
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2576
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<pre style="margin: 0;">+<span id="LC2576" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- For imported Ids we could check for an unfolding, but we have to</span></span>
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2577
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<pre style="margin: 0;">+<span id="LC2577" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- do so anyway in canSpecImport, and it seems better to have it</span></span>
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2578
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<pre style="margin: 0;">+<span id="LC2578" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- all in one place. So we simply collect usage info for imported</span></span>
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2579
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<pre style="margin: 0;">+<span id="LC2579" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- overloaded functions.</span></span>
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2534
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2580
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<pre style="margin: 0;"> <span id="LC2580" class="line" lang="haskell"></span>
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2535
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2581
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<pre style="margin: 0;"> <span id="LC2581" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Type determines value]</span></span>
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2536
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2582
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<pre style="margin: 0;"> <span id="LC2582" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2780" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2826" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2780,55 +2826,12 @@ deleteCallsFor bs calls = delDVarEnvList calls bs</td>
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2780
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2826
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<pre style="margin: 0;"> <span id="LC2826" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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2781
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2827
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<pre style="margin: 0;"> <span id="LC2827" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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2782
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2828
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<pre style="margin: 0;"> <span id="LC2828" class="line" lang="haskell"></span>
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2783
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<pre style="margin: 0;">-<span id="LC2783" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">State</span> <span class="kt" style="color: #458; font-weight: 600;">SpecState</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">deriving</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Functor</span><span class="p">)</span></span>
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2784
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<pre style="margin: 0;">-<span id="LC2784" class="line" lang="haskell"></span>
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2785
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<pre style="margin: 0;">-<span id="LC2785" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">SpecState</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecState</span> <span class="p">{</span></span>
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2786
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<pre style="margin: 0;">-<span id="LC2786" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_uniq_supply</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UniqSupply</span><span class="p">,</span></span>
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2787
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<pre style="margin: 0;">-<span id="LC2787" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_module</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Module</span><span class="p">,</span></span>
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2788
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<pre style="margin: 0;">-<span id="LC2788" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_dflags</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span></span>
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2789
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<pre style="margin: 0;">-<span id="LC2789" class="line" lang="haskell"> <span class="p">}</span></span>
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2790
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<pre style="margin: 0;">-<span id="LC2790" class="line" lang="haskell"></span>
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2791
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<pre style="margin: 0;">-<span id="LC2791" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Applicative</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="kr" style="font-weight: 600;">where</span></span>
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2792
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<pre style="margin: 0;">-<span id="LC2792" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">x</span></span>
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2793
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<pre style="margin: 0;">-<span id="LC2793" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;"><*></span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ap</span></span>
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2794
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<pre style="margin: 0;">-<span id="LC2794" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2795" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Monad</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="kr" style="font-weight: 600;">where</span></span>
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2796
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<pre style="margin: 0;">-<span id="LC2796" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">x</span></span>
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2797
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<pre style="margin: 0;">-<span id="LC2797" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">y</span> <span class="kr" style="font-weight: 600;">of</span></span>
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2798
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<pre style="margin: 0;">-<span id="LC2798" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="n" style="color: #333;">z</span> <span class="o" style="font-weight: 600;">-></span></span>
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2799
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<pre style="margin: 0;">-<span id="LC2799" class="line" lang="haskell"> <span class="n" style="color: #333;">z</span></span>
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2800
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<pre style="margin: 0;">-<span id="LC2800" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2801" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">MonadFail</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="kr" style="font-weight: 600;">where</span></span>
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2802
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<pre style="margin: 0;">-<span id="LC2802" class="line" lang="haskell"> <span class="n" style="color: #333;">fail</span> <span class="n" style="color: #333;">str</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">error</span> <span class="n" style="color: #333;">str</span></span>
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2803
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<pre style="margin: 0;">-<span id="LC2803" class="line" lang="haskell"></span>
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2804
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<pre style="margin: 0;">-<span id="LC2804" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">MonadUnique</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC2805" class="line" lang="haskell"> <span class="n" style="color: #333;">getUniqueSupplyM</span></span>
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<pre style="margin: 0;">-<span id="LC2806" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">st</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">get</span></span>
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2807
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<pre style="margin: 0;">-<span id="LC2807" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">us1</span><span class="p">,</span> <span class="n" style="color: #333;">us2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitUniqSupply</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">spec_uniq_supply</span> <span class="n" style="color: #333;">st</span></span>
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<pre style="margin: 0;">-<span id="LC2808" class="line" lang="haskell"> <span class="n" style="color: #333;">put</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">st</span> <span class="p">{</span> <span class="n" style="color: #333;">spec_uniq_supply</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">us2</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC2809" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">us1</span></span>
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<pre style="margin: 0;">-<span id="LC2810" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2811" class="line" lang="haskell"> <span class="n" style="color: #333;">getUniqueM</span></span>
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2812
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<pre style="margin: 0;">-<span id="LC2812" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">st</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">get</span></span>
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2813
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<pre style="margin: 0;">-<span id="LC2813" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">u</span><span class="p">,</span><span class="n" style="color: #333;">us'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">takeUniqFromSupply</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">spec_uniq_supply</span> <span class="n" style="color: #333;">st</span></span>
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<pre style="margin: 0;">-<span id="LC2814" class="line" lang="haskell"> <span class="n" style="color: #333;">put</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">st</span> <span class="p">{</span> <span class="n" style="color: #333;">spec_uniq_supply</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">us'</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC2815" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">u</span></span>
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<pre style="margin: 0;">-<span id="LC2816" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2817" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">HasDynFlags</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC2818" class="line" lang="haskell"> <span class="n" style="color: #333;">getDynFlags</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">liftM</span> <span class="n" style="color: #333;">spec_dflags</span> <span class="n" style="color: #333;">get</span></span>
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<pre style="margin: 0;">-<span id="LC2819" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2820" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">HasModule</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC2821" class="line" lang="haskell"> <span class="n" style="color: #333;">getModule</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">liftM</span> <span class="n" style="color: #333;">spec_module</span> <span class="n" style="color: #333;">get</span></span>
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<pre style="margin: 0;">-<span id="LC2822" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2823" class="line" lang="haskell"><span class="n" style="color: #333;">runSpecM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Module</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreM</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">-<span id="LC2824" class="line" lang="haskell"><span class="n" style="color: #333;">runSpecM</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">this_mod</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="n" style="color: #333;">spec</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC2825" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">us</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getUniqueSupplyM</span></span>
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<pre style="margin: 0;">-<span id="LC2826" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">initialState</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecState</span> <span class="p">{</span></span>
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<pre style="margin: 0;">-<span id="LC2827" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_uniq_supply</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">us</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC2828" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_module</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">this_mod</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC2829" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_dflags</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dflags</span></span>
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<pre style="margin: 0;">-<span id="LC2830" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC2831" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">evalState</span> <span class="n" style="color: #333;">spec</span> <span class="n" style="color: #333;">initialState</span></span>
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<pre style="margin: 0;">+<span id="LC2829" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UniqSM</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">+<span id="LC2830" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC2831" class="line" lang="haskell"><span class="n" style="color: #333;">runSpecM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreM</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">+<span id="LC2832" class="line" lang="haskell"><span class="n" style="color: #333;">runSpecM</span> <span class="n" style="color: #333;">thing_inside</span></span>
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<pre style="margin: 0;">+<span id="LC2833" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">us</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getUniqueSupplyM</span></span>
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<pre style="margin: 0;">+<span id="LC2834" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">initUs_</span> <span class="n" style="color: #333;">us</span> <span class="n" style="color: #333;">thing_inside</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC2835" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2836" class="line" lang="haskell"><span class="n" style="color: #333;">mapAndCombineSM</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span><span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="p">([</span><span class="n" style="color: #333;">b</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC2837" class="line" lang="haskell"><span class="n" style="color: #333;">mapAndCombineSM</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">emptyUDs</span><span class="p">)</span></span>
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<li id="a8e2a1e5829eb3b4809201e0f47e91b64ce11b96">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#a8e2a1e5829eb3b4809201e0f47e91b64ce11b96"><strong>compiler/GHC/Core/Ppr.hs</strong></a>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="161" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="161" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -161,15 +161,20 @@ pprOptCo co = sdocOption sdocSuppressCoercions $ \case</td>
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161
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<pre style="margin: 0;"> <span id="LC161" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">angleBrackets</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Co:"</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">int</span> <span class="p">(</span><span class="n" style="color: #333;">coercionSize</span> <span class="n" style="color: #333;">co</span><span class="p">))</span></span>
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162
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<pre style="margin: 0;"> <span id="LC162" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">parens</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">sep</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co</span><span class="p">,</span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">coercionType</span> <span class="n" style="color: #333;">co</span><span class="p">)]</span></span>
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<pre style="margin: 0;"> <span id="LC163" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC164" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_id_occ</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SDoc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>
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<pre style="margin: 0;">+<span id="LC165" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_id_occ</span> <span class="n" style="color: #333;">add_par</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">+<span id="LC166" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isJoinId</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">add_par</span> <span class="p">((</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"jump"</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">pp_id</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC167" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pp_id</span></span>
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<pre style="margin: 0;">+<span id="LC168" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC169" class="line" lang="haskell"> <span class="n" style="color: #333;">pp_id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">id</span> <span class="c1" style="color: #998; font-style: italic;">-- We could use pprPrefixOcc to print (+) etc, but this is</span></span>
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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Core where we don't print things infix anyway, so doing</span></span>
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<pre style="margin: 0;">+<span id="LC171" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- so just adds extra redundant parens</span></span>
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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC173" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_expr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OutputableBndr</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">=></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SDoc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Expr</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>
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<pre style="margin: 0;"> <span id="LC174" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The function adds parens in context that need</span></span>
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<pre style="margin: 0;"> <span id="LC175" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- an atomic value (e.g. function args)</span></span>
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<pre style="margin: 0;"> <span id="LC176" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC168" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_expr</span> <span class="n" style="color: #333;">add_par</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">name</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC169" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isJoinId</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">add_par</span> <span class="p">((</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"jump"</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">pp_name</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC170" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pp_name</span></span>
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<pre style="margin: 0;">-<span id="LC171" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC172" class="line" lang="haskell"> <span class="n" style="color: #333;">pp_name</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPrefixOcc</span> <span class="n" style="color: #333;">name</span></span>
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<pre style="margin: 0;">+<span id="LC177" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_expr</span> <span class="n" style="color: #333;">add_par</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">id</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr_id_occ</span> <span class="n" style="color: #333;">add_par</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;"> <span id="LC178" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_expr</span> <span class="n" style="color: #333;">add_par</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">add_par</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"TYPE:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Weird</span></span>
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<pre style="margin: 0;"> <span id="LC179" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_expr</span> <span class="n" style="color: #333;">add_par</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">add_par</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"CO:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_expr</span> <span class="n" style="color: #333;">add_par</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lit</span> <span class="n" style="color: #333;">lit</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprLiteral</span> <span class="n" style="color: #333;">add_par</span> <span class="n" style="color: #333;">lit</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -212,8 +217,7 @@ ppr_expr add_par expr@(App {})</td>
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<pre style="margin: 0;"> <span id="LC217" class="line" lang="haskell"></span>
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213
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<pre style="margin: 0;"> <span id="LC218" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">parens</span> <span class="p">(</span><span class="n" style="color: #333;">hang</span> <span class="n" style="color: #333;">fun_doc</span> <span class="mi" style="color: #099;">2</span> <span class="n" style="color: #333;">pp_args</span><span class="p">)</span></span>
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214
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<pre style="margin: 0;"> <span id="LC219" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC215" class="line" lang="haskell"> <span class="n" style="color: #333;">fun_doc</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isJoinId</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"jump"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">f</span></span>
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216
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<pre style="margin: 0;">-<span id="LC216" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">f</span></span>
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<pre style="margin: 0;">+<span id="LC220" class="line" lang="haskell"> <span class="n" style="color: #333;">fun_doc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr_id_occ</span> <span class="n" style="color: #333;">noParens</span> <span class="n" style="color: #333;">f</span></span>
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221
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<pre style="margin: 0;"> <span id="LC221" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC222" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">parens</span> <span class="p">(</span><span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">pprParendExpr</span> <span class="n" style="color: #333;">fun</span><span class="p">)</span> <span class="mi" style="color: #099;">2</span> <span class="n" style="color: #333;">pp_args</span><span class="p">)</span></span>
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219
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<pre style="margin: 0;"> <span id="LC223" class="line" lang="haskell"> <span class="p">}</span></span>
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<li id="11ffe98a94d798427bc600e4fcfe899407536346">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#11ffe98a94d798427bc600e4fcfe899407536346"><strong>compiler/GHC/Core/SimpleOpt.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -18,17 +18,14 @@ module GHC.Core.SimpleOpt (</td>
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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ** Predicates on expressions</span></span>
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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">exprIsConApp_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">exprIsLiteral_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">exprIsLambda_maybe</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC21" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ** Coercions and casts</span></span>
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<pre style="margin: 0;">-<span id="LC22" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">pushCoArg</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoValArg</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pushCoTyArg</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">collectBindersPushingCo</span></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"> <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="n" style="color: #333;">include</span> <span class="s" style="color: #d14;">"HsVersions.h"</span></span>
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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Prelude</span></span>
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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Opt.Arity</span><span class="p">(</span> <span class="n" style="color: #333;">etaExpandToJoinPoint</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC30" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core</span></span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Opt.Arity</span></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Subst</span></span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Utils</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.FVs</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -48,16 +45,12 @@ import GHC.Core.Coercion.Opt ( optCoercion, OptCoercionOpts (..) )</td>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Type</span> <span class="k" style="font-weight: 600;">hiding</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">substTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">extendTvSubst</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">extendCvSubst</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">extendTvSubstList</span></span>
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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isInScope</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substTyVarBndr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">cloneTyVarBndr</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Coercion</span> <span class="k" style="font-weight: 600;">hiding</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">substCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substCoVarBndr</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCon</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">tyConArity</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Multiplicity</span></span>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Types</span></span>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Names</span></span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Basic</span></span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Unit.Module</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Module</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC57" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Ppr</span></span>
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Outputable</span></span>
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Panic</span></span>
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<pre style="margin: 0;">-<span id="LC60" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.Pair</span></span>
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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Misc</span></span>
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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.Maybe</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">orElse</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.FastString</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -782,6 +775,28 @@ a good cause. And it won't hurt other RULES and such that it comes across.</td>
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782
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<pre style="margin: 0;"> <span id="LC775" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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<pre style="margin: 0;"> <span id="LC776" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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777
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<pre style="margin: 0;"> <span id="LC777" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC778" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Strictness and join points]</span></span>
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<pre style="margin: 0;">+<span id="LC779" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">+<span id="LC780" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Suppose we have</span></span>
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<pre style="margin: 0;">+<span id="LC781" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC782" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> let f = \x. if x>200 then e1 else e1</span></span>
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<pre style="margin: 0;">+<span id="LC783" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC784" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and we know that f is strict in x. Then if we subsequently</span></span>
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<pre style="margin: 0;">+<span id="LC785" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">discover that f is an arity-2 join point, we'll eta-expand it to</span></span>
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<pre style="margin: 0;">+<span id="LC786" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC787" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> let f = \x y. if x>200 then e1 else e1</span></span>
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<pre style="margin: 0;">+<span id="LC788" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC789" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and now it's only strict if applied to two arguments. So we should</span></span>
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<pre style="margin: 0;">+<span id="LC790" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">adjust the strictness info.</span></span>
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<pre style="margin: 0;">+<span id="LC792" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">A more common case is when</span></span>
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<pre style="margin: 0;">+<span id="LC794" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f = \x. error ".."</span></span>
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<pre style="margin: 0;">+<span id="LC796" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and again its arity increases (#15517)</span></span>
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<pre style="margin: 0;">+<span id="LC797" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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<pre style="margin: 0;">+<span id="LC798" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC799" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC800" class="line" lang="haskell"><span class="cd">-- | Returns Just (bndr,rhs) if the binding is a join point:</span></span>
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<pre style="margin: 0;"> <span id="LC801" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If it's a JoinId, just return it</span></span>
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<pre style="margin: 0;"> <span id="LC802" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If it's not yet a JoinId but is always tail-called,</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -815,27 +830,6 @@ joinPointBindings_maybe bndrs</td>
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<pre style="margin: 0;"> <span id="LC830" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapM</span> <span class="p">(</span><span class="n" style="color: #333;">uncurry</span> <span class="n" style="color: #333;">joinPointBinding_maybe</span><span class="p">)</span> <span class="n" style="color: #333;">bndrs</span></span>
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<pre style="margin: 0;"> <span id="LC831" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC832" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC818" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Strictness and join points]</span></span>
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<pre style="margin: 0;">-<span id="LC819" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">-<span id="LC820" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Suppose we have</span></span>
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<pre style="margin: 0;">-<span id="LC821" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC822" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> let f = \x. if x>200 then e1 else e1</span></span>
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<pre style="margin: 0;">-<span id="LC823" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC824" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and we know that f is strict in x. Then if we subsequently</span></span>
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<pre style="margin: 0;">-<span id="LC825" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">discover that f is an arity-2 join point, we'll eta-expand it to</span></span>
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<pre style="margin: 0;">-<span id="LC826" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC827" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> let f = \x y. if x>200 then e1 else e1</span></span>
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<pre style="margin: 0;">-<span id="LC828" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC829" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and now it's only strict if applied to two arguments. So we should</span></span>
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<pre style="margin: 0;">-<span id="LC830" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">adjust the strictness info.</span></span>
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<pre style="margin: 0;">-<span id="LC831" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC832" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">A more common case is when</span></span>
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833
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<pre style="margin: 0;">-<span id="LC833" class="line" lang="haskell"></span>
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834
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<pre style="margin: 0;">-<span id="LC834" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f = \x. error ".."</span></span>
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835
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<pre style="margin: 0;">-<span id="LC835" class="line" lang="haskell"></span>
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836
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<pre style="margin: 0;">-<span id="LC836" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and again its arity increases (#15517)</span></span>
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837
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<pre style="margin: 0;">-<span id="LC837" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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838
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<pre style="margin: 0;">-<span id="LC838" class="line" lang="haskell"></span>
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839
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833
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<pre style="margin: 0;"> <span id="LC833" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
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834
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<pre style="margin: 0;"> <span id="LC834" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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841
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835
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<pre style="margin: 0;"> <span id="LC835" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> exprIsConApp_maybe</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1350,275 +1344,3 @@ exprIsLambda_maybe _ _e</td>
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1350
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1344
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<pre style="margin: 0;"> <span id="LC1344" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1351
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1345
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<pre style="margin: 0;"> <span id="LC1345" class="line" lang="haskell"></span>
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1352
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1346
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<pre style="margin: 0;"> <span id="LC1346" class="line" lang="haskell"></span></pre>
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1353
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<pre style="margin: 0;">-<span id="LC1353" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
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1354
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<pre style="margin: 0;">-<span id="LC1354" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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1355
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<pre style="margin: 0;">-<span id="LC1355" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> The "push rules"</span></span>
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1356
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<pre style="margin: 0;">-<span id="LC1356" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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1357
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<pre style="margin: 0;">-<span id="LC1357" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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1358
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<pre style="margin: 0;">-<span id="LC1358" class="line" lang="haskell"></span>
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1359
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<pre style="margin: 0;">-<span id="LC1359" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Here we implement the "push rules" from FC papers:</span></span>
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1360
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<pre style="margin: 0;">-<span id="LC1360" class="line" lang="haskell"></span>
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1361
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<pre style="margin: 0;">-<span id="LC1361" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The push-argument rules, where we can move a coercion past an argument.</span></span>
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1362
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<pre style="margin: 0;">-<span id="LC1362" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> We have</span></span>
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1363
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<pre style="margin: 0;">-<span id="LC1363" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (fun |> co) arg</span></span>
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1364
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<pre style="margin: 0;">-<span id="LC1364" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> and we want to transform it to</span></span>
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<pre style="margin: 0;">-<span id="LC1365" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (fun arg') |> co'</span></span>
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<pre style="margin: 0;">-<span id="LC1366" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> for some suitable co' and transformed arg'.</span></span>
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1367
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<pre style="margin: 0;">-<span id="LC1367" class="line" lang="haskell"></span>
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1368
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<pre style="margin: 0;">-<span id="LC1368" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The PushK rule for data constructors. We have</span></span>
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1369
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<pre style="margin: 0;">-<span id="LC1369" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (K e1 .. en) |> co</span></span>
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1370
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<pre style="margin: 0;">-<span id="LC1370" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> and we want to transform to</span></span>
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1371
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<pre style="margin: 0;">-<span id="LC1371" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (K e1' .. en')</span></span>
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1372
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<pre style="margin: 0;">-<span id="LC1372" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> by pushing the coercion into the arguments</span></span>
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1373
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<pre style="margin: 0;">-<span id="LC1373" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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1374
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<pre style="margin: 0;">-<span id="LC1374" class="line" lang="haskell"></span>
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1375
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<pre style="margin: 0;">-<span id="LC1375" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArgs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreArg</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">CoreArg</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span><span class="p">)</span></span>
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1376
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<pre style="margin: 0;">-<span id="LC1376" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArgs</span> <span class="n" style="color: #333;">co</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1377
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<pre style="margin: 0;">-<span id="LC1377" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArgs</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">arg'</span><span class="p">,</span> <span class="n" style="color: #333;">m_co1</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoArg</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">arg</span></span>
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1378
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<pre style="margin: 0;">-<span id="LC1378" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">m_co1</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1379
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<pre style="margin: 0;">-<span id="LC1379" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co1</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">args'</span><span class="p">,</span> <span class="n" style="color: #333;">m_co2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoArgs</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">args</span></span>
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1380
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<pre style="margin: 0;">-<span id="LC1380" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">arg'</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">args'</span><span class="p">,</span> <span class="n" style="color: #333;">m_co2</span><span class="p">)</span> <span class="p">}</span></span>
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1381
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<pre style="margin: 0;">-<span id="LC1381" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">arg'</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span><span class="p">)</span> <span class="p">}</span></span>
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1382
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<pre style="margin: 0;">-<span id="LC1382" class="line" lang="haskell"></span>
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1383
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<pre style="margin: 0;">-<span id="LC1383" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreArg</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreArg</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span><span class="p">)</span></span>
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1384
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<pre style="margin: 0;">-<span id="LC1384" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We have (fun |> co) arg, and we want to transform it to</span></span>
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1385
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<pre style="margin: 0;">-<span id="LC1385" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (fun arg) |> co</span></span>
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1386
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<pre style="margin: 0;">-<span id="LC1386" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This may fail, e.g. if (fun :: N) where N is a newtype</span></span>
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1387
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<pre style="margin: 0;">-<span id="LC1387" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- C.f. simplCast in GHC.Core.Opt.Simplify</span></span>
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1388
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<pre style="margin: 0;">-<span id="LC1388" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'co' is always Representational</span></span>
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1389
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<pre style="margin: 0;">-<span id="LC1389" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If the returned coercion is Nothing, then it would have been reflexive</span></span>
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1390
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<pre style="margin: 0;">-<span id="LC1390" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArg</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">ty'</span><span class="p">,</span> <span class="n" style="color: #333;">m_co'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoTyArg</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">ty</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1391" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1391
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1391" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">ty'</span><span class="p">,</span> <span class="n" style="color: #333;">m_co'</span><span class="p">)</span> <span class="p">}</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1392" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1392
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1392" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoArg</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">val_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">arg_co</span><span class="p">,</span> <span class="n" style="color: #333;">m_co'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushCoValArg</span> <span class="n" style="color: #333;">co</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1393" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1393
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1393" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">val_arg</span> <span class="p">`</span><span class="n" style="color: #333;">mkCast</span><span class="p">`</span> <span class="n" style="color: #333;">arg_co</span><span class="p">,</span> <span class="n" style="color: #333;">m_co'</span><span class="p">)</span> <span class="p">}</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1394" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1394
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<pre style="margin: 0;">-<span id="LC1394" class="line" lang="haskell"></span>
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<td class="diff-line-num old old_line" data-linenumber="1395" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1395
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<pre style="margin: 0;">-<span id="LC1395" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoTyArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercionR</span><span class="p">)</span></span>
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1396
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<pre style="margin: 0;">-<span id="LC1396" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We have (fun |> co) @ty</span></span>
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1397
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<pre style="margin: 0;">-<span id="LC1397" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Push the coercion through to return</span></span>
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1398
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<pre style="margin: 0;">-<span id="LC1398" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (fun @ty') |> co'</span></span>
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1399
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<pre style="margin: 0;">-<span id="LC1399" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'co' is always Representational</span></span>
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1400
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<pre style="margin: 0;">-<span id="LC1400" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If the returned coercion is Nothing, then it would have been reflexive;</span></span>
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1401
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<pre style="margin: 0;">-<span id="LC1401" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- it's faster not to compute it, though.</span></span>
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1402
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<pre style="margin: 0;">-<span id="LC1402" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoTyArg</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">ty</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1403" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1403
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<pre style="margin: 0;">-<span id="LC1403" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The following is inefficient - don't do `eqType` here, the coercion</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1404" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1404
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<pre style="margin: 0;">-<span id="LC1404" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- optimizer will take care of it. See #14737.</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1405" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1405
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<pre style="margin: 0;">-<span id="LC1405" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- -- | tyL `eqType` tyR</span></span>
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1406
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<pre style="margin: 0;">-<span id="LC1406" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- -- = Just (ty, Nothing)</span></span>
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<pre style="margin: 0;">-<span id="LC1407" class="line" lang="haskell"></span>
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1408
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<pre style="margin: 0;">-<span id="LC1408" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co</span></span>
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1409
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<pre style="margin: 0;">-<span id="LC1409" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span><span class="p">)</span></span>
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1410
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<pre style="margin: 0;">-<span id="LC1410" class="line" lang="haskell"></span>
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1411
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<pre style="margin: 0;">-<span id="LC1411" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isForAllTy_ty</span> <span class="n" style="color: #333;">tyL</span></span>
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1412
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<pre style="margin: 0;">-<span id="LC1412" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">isForAllTy_ty</span> <span class="n" style="color: #333;">tyR</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span> <span class="p">)</span></span>
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1413
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<pre style="margin: 0;">-<span id="LC1413" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span> <span class="p">`</span><span class="n" style="color: #333;">mkCastTy</span><span class="p">`</span> <span class="n" style="color: #333;">co1</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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1414
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<pre style="margin: 0;">-<span id="LC1414" class="line" lang="haskell"></span>
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1415
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<pre style="margin: 0;">-<span id="LC1415" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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1416
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<pre style="margin: 0;">-<span id="LC1416" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1417
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<pre style="margin: 0;">-<span id="LC1417" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1418
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<pre style="margin: 0;">-<span id="LC1418" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">tyL</span> <span class="n" style="color: #333;">tyR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1419
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<pre style="margin: 0;">-<span id="LC1419" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co :: tyL ~ tyR</span></span>
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1420
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<pre style="margin: 0;">-<span id="LC1420" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- tyL = forall (a1 :: k1). ty1</span></span>
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1421
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<pre style="margin: 0;">-<span id="LC1421" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- tyR = forall (a2 :: k2). ty2</span></span>
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1422
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<pre style="margin: 0;">-<span id="LC1422" class="line" lang="haskell"></span>
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1423
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<pre style="margin: 0;">-<span id="LC1423" class="line" lang="haskell"> <span class="n" style="color: #333;">co1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkSymCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkNthCo</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1424
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<pre style="margin: 0;">-<span id="LC1424" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co1 :: k2 ~N k1</span></span>
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1425
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<pre style="margin: 0;">-<span id="LC1425" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Note that NthCo can extract a Nominal equality between the</span></span>
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1426
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<pre style="margin: 0;">-<span id="LC1426" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- kinds of the types related by a coercion between forall-types.</span></span>
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1427
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<pre style="margin: 0;">-<span id="LC1427" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See the NthCo case in GHC.Core.Lint.</span></span>
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1428
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<pre style="margin: 0;">-<span id="LC1428" class="line" lang="haskell"></span>
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1429
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<pre style="margin: 0;">-<span id="LC1429" class="line" lang="haskell"> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkInstCo</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">mkGReflLeftCo</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">co1</span><span class="p">)</span></span>
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1430
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<pre style="margin: 0;">-<span id="LC1430" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co2 :: ty1[ (ty|>co1)/a1 ] ~ ty2[ ty/a2 ]</span></span>
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1431
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<pre style="margin: 0;">-<span id="LC1431" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Arg of mkInstCo is always nominal, hence mkNomReflCo</span></span>
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1432
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<pre style="margin: 0;">-<span id="LC1432" class="line" lang="haskell"></span>
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1433
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<pre style="margin: 0;">-<span id="LC1433" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoValArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Coercion</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCoercion</span><span class="p">)</span></span>
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1434
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<pre style="margin: 0;">-<span id="LC1434" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We have (fun |> co) arg</span></span>
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1435
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<pre style="margin: 0;">-<span id="LC1435" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Push the coercion through to return</span></span>
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1436
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<pre style="margin: 0;">-<span id="LC1436" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (fun (arg |> co_arg)) |> co_res</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1437" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1437
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<pre style="margin: 0;">-<span id="LC1437" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'co' is always Representational</span></span>
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1438
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<pre style="margin: 0;">-<span id="LC1438" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If the second returned Coercion is actually Nothing, then no cast is necessary;</span></span>
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1439
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<pre style="margin: 0;">-<span id="LC1439" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the returned coercion would have been reflexive.</span></span>
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1440
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<pre style="margin: 0;">-<span id="LC1440" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoValArg</span> <span class="n" style="color: #333;">co</span></span>
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1441
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<pre style="margin: 0;">-<span id="LC1441" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The following is inefficient - don't do `eqType` here, the coercion</span></span>
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1442
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<pre style="margin: 0;">-<span id="LC1442" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- optimizer will take care of it. See #14737.</span></span>
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1443
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<pre style="margin: 0;">-<span id="LC1443" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- -- | tyL `eqType` tyR</span></span>
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1444
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<pre style="margin: 0;">-<span id="LC1444" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- -- = Just (mkRepReflCo arg, Nothing)</span></span>
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1445
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<pre style="margin: 0;">-<span id="LC1445" class="line" lang="haskell"></span>
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1446
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<pre style="margin: 0;">-<span id="LC1446" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co</span></span>
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1447
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<pre style="margin: 0;">-<span id="LC1447" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">mkRepReflCo</span> <span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MRefl</span><span class="p">)</span></span>
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1448
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<pre style="margin: 0;">-<span id="LC1448" class="line" lang="haskell"></span>
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1449
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<pre style="margin: 0;">-<span id="LC1449" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isFunTy</span> <span class="n" style="color: #333;">tyL</span></span>
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1450
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<pre style="margin: 0;">-<span id="LC1450" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">co_mult</span><span class="p">,</span> <span class="n" style="color: #333;">co1</span><span class="p">,</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">decomposeFunCo</span> <span class="kt" style="color: #458; font-weight: 600;">Representational</span> <span class="n" style="color: #333;">co</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1451" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1451
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<pre style="margin: 0;">-<span id="LC1451" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflexiveCo</span> <span class="n" style="color: #333;">co_mult</span></span>
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1452
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<pre style="margin: 0;">-<span id="LC1452" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We can't push the coercion in the case where co_mult isn't reflexivity:</span></span>
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1453
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<pre style="margin: 0;">-<span id="LC1453" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- it could be an unsafe axiom, and losing this information could yield</span></span>
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1454
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<pre style="margin: 0;">-<span id="LC1454" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ill-typed terms. For instance (fun x ::(1) Int -> (fun _ -> () |> co) x)</span></span>
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1455
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<pre style="margin: 0;">-<span id="LC1455" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- with co :: (Int -> ()) ~ (Int #-> ()), would reduce to (fun x ::(1) Int</span></span>
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1456
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<pre style="margin: 0;">-<span id="LC1456" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- -> (fun _ ::(Many) Int -> ()) x) which is ill-typed</span></span>
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1457
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<pre style="margin: 0;">-<span id="LC1457" class="line" lang="haskell"></span>
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1458
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<pre style="margin: 0;">-<span id="LC1458" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- If co :: (tyL1 -> tyL2) ~ (tyR1 -> tyR2)</span></span>
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1459
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<pre style="margin: 0;">-<span id="LC1459" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- then co1 :: tyL1 ~ tyR1</span></span>
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1460
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<pre style="margin: 0;">-<span id="LC1460" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co2 :: tyL2 ~ tyR2</span></span>
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1461
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<pre style="margin: 0;">-<span id="LC1461" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">isFunTy</span> <span class="n" style="color: #333;">tyR</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg</span> <span class="p">)</span></span>
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1462
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<pre style="margin: 0;">-<span id="LC1462" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">mkSymCo</span> <span class="n" style="color: #333;">co1</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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1463
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<pre style="margin: 0;">-<span id="LC1463" class="line" lang="haskell"></span>
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1464
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<pre style="margin: 0;">-<span id="LC1464" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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1465
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<pre style="margin: 0;">-<span id="LC1465" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1466
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<pre style="margin: 0;">-<span id="LC1466" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1467
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<pre style="margin: 0;">-<span id="LC1467" class="line" lang="haskell"> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">funArgTy</span> <span class="n" style="color: #333;">tyR</span></span>
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1468
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<pre style="margin: 0;">-<span id="LC1468" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">tyL</span> <span class="n" style="color: #333;">tyR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1469
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<pre style="margin: 0;">-<span id="LC1469" class="line" lang="haskell"></span>
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1470
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<pre style="margin: 0;">-<span id="LC1470" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoercionIntoLambda</span></span>
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1471
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<pre style="margin: 0;">-<span id="LC1471" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">InScopeSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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1472
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<pre style="margin: 0;">-<span id="LC1472" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This implements the Push rule from the paper on coercions</span></span>
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1473
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<pre style="margin: 0;">-<span id="LC1473" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (\x. e) |> co</span></span>
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1474
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<pre style="margin: 0;">-<span id="LC1474" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ===></span></span>
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1475
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<pre style="margin: 0;">-<span id="LC1475" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (\x'. e |> co')</span></span>
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1476
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<pre style="margin: 0;">-<span id="LC1476" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoercionIntoLambda</span> <span class="n" style="color: #333;">in_scope</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1477" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1477
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1477" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isTyVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isCoVar</span> <span class="n" style="color: #333;">x</span><span class="p">))</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1478" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1478
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1478" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">s1s2</span> <span class="n" style="color: #333;">t1t2</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1479" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1479
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1479" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">_s1</span><span class="p">,</span><span class="n" style="color: #333;">_s2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitFunTy_maybe</span> <span class="n" style="color: #333;">s1s2</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1480" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1480
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1480" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">w1</span><span class="p">,</span> <span class="n" style="color: #333;">t1</span><span class="p">,</span><span class="n" style="color: #333;">_t2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitFunTy_maybe</span> <span class="n" style="color: #333;">t1t2</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1481" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1481
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1481" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">co_mult</span><span class="p">,</span> <span class="n" style="color: #333;">co1</span><span class="p">,</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">decomposeFunCo</span> <span class="kt" style="color: #458; font-weight: 600;">Representational</span> <span class="n" style="color: #333;">co</span></span>
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1482
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<pre style="margin: 0;">-<span id="LC1482" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflexiveCo</span> <span class="n" style="color: #333;">co_mult</span></span>
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1483
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<pre style="margin: 0;">-<span id="LC1483" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We can't push the coercion in the case where co_mult isn't</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1484" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1484
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<pre style="margin: 0;">-<span id="LC1484" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- reflexivity. See pushCoValArg for more details.</span></span>
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1485
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<pre style="margin: 0;">-<span id="LC1485" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span></span>
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1486
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<pre style="margin: 0;">-<span id="LC1486" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Should we optimize the coercions here?</span></span>
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1487
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<pre style="margin: 0;">-<span id="LC1487" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Otherwise they might not match too well</span></span>
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1488
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<pre style="margin: 0;">-<span id="LC1488" class="line" lang="haskell"> <span class="n" style="color: #333;">x'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span> <span class="p">`</span><span class="n" style="color: #333;">setIdType</span><span class="p">`</span> <span class="n" style="color: #333;">t1</span> <span class="p">`</span><span class="n" style="color: #333;">setIdMult</span><span class="p">`</span> <span class="n" style="color: #333;">w1</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1489" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1489
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<pre style="margin: 0;">-<span id="LC1489" class="line" lang="haskell"> <span class="n" style="color: #333;">in_scope'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">in_scope</span> <span class="p">`</span><span class="n" style="color: #333;">extendInScopeSet</span><span class="p">`</span> <span class="n" style="color: #333;">x'</span></span>
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1490
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<pre style="margin: 0;">-<span id="LC1490" class="line" lang="haskell"> <span class="n" style="color: #333;">subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendIdSubst</span> <span class="p">(</span><span class="n" style="color: #333;">mkEmptySubst</span> <span class="n" style="color: #333;">in_scope'</span><span class="p">)</span></span>
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1491
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<pre style="margin: 0;">-<span id="LC1491" class="line" lang="haskell"> <span class="n" style="color: #333;">x</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1492" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1492
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<pre style="margin: 0;">-<span id="LC1492" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">mkCast</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">x'</span><span class="p">)</span> <span class="n" style="color: #333;">co1</span><span class="p">)</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1493" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1493
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<pre style="margin: 0;">-<span id="LC1493" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">x'</span><span class="p">,</span> <span class="n" style="color: #333;">substExpr</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">e</span> <span class="p">`</span><span class="n" style="color: #333;">mkCast</span><span class="p">`</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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1494
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<pre style="margin: 0;">-<span id="LC1494" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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1495
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<pre style="margin: 0;">-<span id="LC1495" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprTrace</span> <span class="s" style="color: #d14;">"exprIsLambda_maybe: Unexpected lambda in case"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span><span class="p">))</span></span>
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1496
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<pre style="margin: 0;">-<span id="LC1496" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1497
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<pre style="margin: 0;">-<span id="LC1497" class="line" lang="haskell"></span>
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1498
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<pre style="margin: 0;">-<span id="LC1498" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoDataCon</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DataCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span></span>
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1499
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<pre style="margin: 0;">-<span id="LC1499" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataCon</span></span>
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1500
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<pre style="margin: 0;">-<span id="LC1500" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Universal type args</span></span>
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1501
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<pre style="margin: 0;">-<span id="LC1501" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">])</span> <span class="c1" style="color: #998; font-style: italic;">-- All other args incl existentials</span></span>
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1502
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<pre style="margin: 0;">-<span id="LC1502" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Implement the KPush reduction rule as described in "Down with kinds"</span></span>
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1503
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<pre style="margin: 0;">-<span id="LC1503" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The transformation applies iff we have</span></span>
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1504
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<pre style="margin: 0;">-<span id="LC1504" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (C e1 ... en) `cast` co</span></span>
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1505
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<pre style="margin: 0;">-<span id="LC1505" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- where co :: (T t1 .. tn) ~ to_ty</span></span>
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1506
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<pre style="margin: 0;">-<span id="LC1506" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The left-hand one must be a T, because exprIsConApp returned True</span></span>
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1507
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<pre style="margin: 0;">-<span id="LC1507" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- but the right-hand one might not be. (Though it usually will.)</span></span>
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1508
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<pre style="margin: 0;">-<span id="LC1508" class="line" lang="haskell"><span class="n" style="color: #333;">pushCoDataCon</span> <span class="n" style="color: #333;">dc</span> <span class="n" style="color: #333;">dc_args</span> <span class="n" style="color: #333;">co</span></span>
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1509
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<pre style="margin: 0;">-<span id="LC1509" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">from_ty</span> <span class="p">`</span><span class="n" style="color: #333;">eqType</span><span class="p">`</span> <span class="n" style="color: #333;">to_ty</span> <span class="c1" style="color: #998; font-style: italic;">-- try cheap test first</span></span>
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1510
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<pre style="margin: 0;">-<span id="LC1510" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">univ_ty_args</span><span class="p">,</span> <span class="n" style="color: #333;">rest_args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitAtList</span> <span class="p">(</span><span class="n" style="color: #333;">dataConUnivTyVars</span> <span class="n" style="color: #333;">dc</span><span class="p">)</span> <span class="n" style="color: #333;">dc_args</span></span>
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1511
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<pre style="margin: 0;">-<span id="LC1511" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">dc</span><span class="p">,</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">exprToType</span> <span class="n" style="color: #333;">univ_ty_args</span><span class="p">,</span> <span class="n" style="color: #333;">rest_args</span><span class="p">)</span></span>
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1512
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<pre style="margin: 0;">-<span id="LC1512" class="line" lang="haskell"></span>
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1513
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<pre style="margin: 0;">-<span id="LC1513" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">to_tc</span><span class="p">,</span> <span class="n" style="color: #333;">to_tc_arg_tys</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitTyConApp_maybe</span> <span class="n" style="color: #333;">to_ty</span></span>
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1514
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<pre style="margin: 0;">-<span id="LC1514" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">to_tc</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">dataConTyCon</span> <span class="n" style="color: #333;">dc</span></span>
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<pre style="margin: 0;">-<span id="LC1515" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- These two tests can fail; we might see</span></span>
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<pre style="margin: 0;">-<span id="LC1516" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (C x y) `cast` (g :: T a ~ S [a]),</span></span>
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1517
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<pre style="margin: 0;">-<span id="LC1517" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- where S is a type function. In fact, exprIsConApp</span></span>
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1518
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<pre style="margin: 0;">-<span id="LC1518" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- will probably not be called in such circumstances,</span></span>
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1519
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<pre style="margin: 0;">-<span id="LC1519" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- but there's nothing wrong with it</span></span>
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1520
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<pre style="margin: 0;">-<span id="LC1520" class="line" lang="haskell"></span>
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1521
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<pre style="margin: 0;">-<span id="LC1521" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span></span>
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1522
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<pre style="margin: 0;">-<span id="LC1522" class="line" lang="haskell"> <span class="n" style="color: #333;">tc_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConArity</span> <span class="n" style="color: #333;">to_tc</span></span>
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1523
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<pre style="margin: 0;">-<span id="LC1523" class="line" lang="haskell"> <span class="n" style="color: #333;">dc_univ_tyvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dataConUnivTyVars</span> <span class="n" style="color: #333;">dc</span></span>
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1524
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<pre style="margin: 0;">-<span id="LC1524" class="line" lang="haskell"> <span class="n" style="color: #333;">dc_ex_tcvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dataConExTyCoVars</span> <span class="n" style="color: #333;">dc</span></span>
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1525
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<pre style="margin: 0;">-<span id="LC1525" class="line" lang="haskell"> <span class="n" style="color: #333;">arg_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dataConRepArgTys</span> <span class="n" style="color: #333;">dc</span></span>
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1526
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<pre style="margin: 0;">-<span id="LC1526" class="line" lang="haskell"></span>
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1527
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<pre style="margin: 0;">-<span id="LC1527" class="line" lang="haskell"> <span class="n" style="color: #333;">non_univ_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dropList</span> <span class="n" style="color: #333;">dc_univ_tyvars</span> <span class="n" style="color: #333;">dc_args</span></span>
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1528
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<pre style="margin: 0;">-<span id="LC1528" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">ex_args</span><span class="p">,</span> <span class="n" style="color: #333;">val_args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitAtList</span> <span class="n" style="color: #333;">dc_ex_tcvars</span> <span class="n" style="color: #333;">non_univ_args</span></span>
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1529
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<pre style="margin: 0;">-<span id="LC1529" class="line" lang="haskell"></span>
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1530
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<pre style="margin: 0;">-<span id="LC1530" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Make the "Psi" from the paper</span></span>
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1531
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<pre style="margin: 0;">-<span id="LC1531" class="line" lang="haskell"> <span class="n" style="color: #333;">omegas</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">decomposeCo</span> <span class="n" style="color: #333;">tc_arity</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">tyConRolesRepresentational</span> <span class="n" style="color: #333;">to_tc</span><span class="p">)</span></span>
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1532
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<pre style="margin: 0;">-<span id="LC1532" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">psi_subst</span><span class="p">,</span> <span class="n" style="color: #333;">to_ex_arg_tys</span><span class="p">)</span></span>
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1533
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<pre style="margin: 0;">-<span id="LC1533" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">liftCoSubstWithEx</span> <span class="kt" style="color: #458; font-weight: 600;">Representational</span></span>
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1534
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<pre style="margin: 0;">-<span id="LC1534" class="line" lang="haskell"> <span class="n" style="color: #333;">dc_univ_tyvars</span></span>
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1535
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<pre style="margin: 0;">-<span id="LC1535" class="line" lang="haskell"> <span class="n" style="color: #333;">omegas</span></span>
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1536
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<pre style="margin: 0;">-<span id="LC1536" class="line" lang="haskell"> <span class="n" style="color: #333;">dc_ex_tcvars</span></span>
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1537
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<pre style="margin: 0;">-<span id="LC1537" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">exprToType</span> <span class="n" style="color: #333;">ex_args</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC1538" class="line" lang="haskell"></span>
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1539
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<pre style="margin: 0;">-<span id="LC1539" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Cast the value arguments (which include dictionaries)</span></span>
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1540
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<pre style="margin: 0;">-<span id="LC1540" class="line" lang="haskell"> <span class="n" style="color: #333;">new_val_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">zipWith</span> <span class="n" style="color: #333;">cast_arg</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">scaledThing</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">)</span> <span class="n" style="color: #333;">val_args</span></span>
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1541
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<pre style="margin: 0;">-<span id="LC1541" class="line" lang="haskell"> <span class="n" style="color: #333;">cast_arg</span> <span class="n" style="color: #333;">arg_ty</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkCast</span> <span class="n" style="color: #333;">arg</span> <span class="p">(</span><span class="n" style="color: #333;">psi_subst</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span></span>
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1542
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<pre style="margin: 0;">-<span id="LC1542" class="line" lang="haskell"></span>
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1543
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<pre style="margin: 0;">-<span id="LC1543" class="line" lang="haskell"> <span class="n" style="color: #333;">to_ex_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">to_ex_arg_tys</span></span>
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1544
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<pre style="margin: 0;">-<span id="LC1544" class="line" lang="haskell"></span>
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1545
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<pre style="margin: 0;">-<span id="LC1545" class="line" lang="haskell"> <span class="n" style="color: #333;">dump_doc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vcat</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">dc</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">dc_univ_tyvars</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">dc_ex_tcvars</span><span class="p">,</span></span>
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1546
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<pre style="margin: 0;">-<span id="LC1546" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">dc_args</span><span class="p">,</span></span>
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1547
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<pre style="margin: 0;">-<span id="LC1547" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ex_args</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">val_args</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">from_ty</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">to_ty</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">to_tc</span></span>
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1548
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1548" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">to_tc</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">exprToType</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">takeList</span> <span class="n" style="color: #333;">dc_univ_tyvars</span> <span class="n" style="color: #333;">dc_args</span><span class="p">)</span> <span class="p">]</span></span>
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1549
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<pre style="margin: 0;">-<span id="LC1549" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span></span>
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1550
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1550" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">eqType</span> <span class="n" style="color: #333;">from_ty</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">to_tc</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">exprToType</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">takeList</span> <span class="n" style="color: #333;">dc_univ_tyvars</span> <span class="n" style="color: #333;">dc_args</span><span class="p">)),</span> <span class="n" style="color: #333;">dump_doc</span> <span class="p">)</span></span>
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1551
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<pre style="margin: 0;">-<span id="LC1551" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">equalLength</span> <span class="n" style="color: #333;">val_args</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">,</span> <span class="n" style="color: #333;">dump_doc</span> <span class="p">)</span></span>
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1552
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1552" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">dc</span><span class="p">,</span> <span class="n" style="color: #333;">to_tc_arg_tys</span><span class="p">,</span> <span class="n" style="color: #333;">to_ex_args</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">new_val_args</span><span class="p">)</span></span>
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1553
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<pre style="margin: 0;">-<span id="LC1553" class="line" lang="haskell"></span>
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1554
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<pre style="margin: 0;">-<span id="LC1554" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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1555
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1555" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1556
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1556" class="line" lang="haskell"></span>
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1557
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1557" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1558" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1558
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<pre style="margin: 0;">-<span id="LC1558" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">from_ty</span> <span class="n" style="color: #333;">to_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1559
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1559" class="line" lang="haskell"></span>
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1560
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<pre style="margin: 0;">-<span id="LC1560" class="line" lang="haskell"><span class="n" style="color: #333;">collectBindersPushingCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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1561
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1561" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Collect lambda binders, pushing coercions inside if possible</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1562" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1562
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1562" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- E.g. (\x.e) |> g g :: <Int> -> blah</span></span>
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1563
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1563" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- = (\x. e |> Nth 1 g)</span></span>
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1564
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1564" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1565
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1565" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- That is,</span></span>
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1566
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1566" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1567
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1567" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- collectBindersPushingCo ((\x.e) |> g) === ([x], e |> Nth 1 g)</span></span>
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1568
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<pre style="margin: 0;">-<span id="LC1568" class="line" lang="haskell"><span class="n" style="color: #333;">collectBindersPushingCo</span> <span class="n" style="color: #333;">e</span></span>
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1569
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1569" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">e</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1570" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1570
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<pre style="margin: 0;">-<span id="LC1570" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1571
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1571" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Peel off lambdas until we hit a cast.</span></span>
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1572
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<pre style="margin: 0;">-<span id="LC1572" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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1573
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<pre style="margin: 0;">-<span id="LC1573" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The accumulator is in reverse order</span></span>
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1574
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<pre style="margin: 0;">-<span id="LC1574" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">bs</span><span class="p">)</span> <span class="n" style="color: #333;">e</span></span>
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1575
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<pre style="margin: 0;">-<span id="LC1575" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_c</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span></span>
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1576
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1576" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">bs</span><span class="p">,</span> <span class="n" style="color: #333;">e</span><span class="p">)</span></span>
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1577
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<pre style="margin: 0;">-<span id="LC1577" class="line" lang="haskell"></span>
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1578
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<pre style="margin: 0;">-<span id="LC1578" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We are in a cast; peel off casts until we hit a lambda.</span></span>
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1579
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<pre style="margin: 0;">-<span id="LC1579" class="line" lang="haskell"> <span class="n" style="color: #333;">go_c</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC1580" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (go_c bs e c) is same as (go bs e (e |> c))</span></span>
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1581
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<pre style="margin: 0;">-<span id="LC1581" class="line" lang="haskell"> <span class="n" style="color: #333;">go_c</span> <span class="n" style="color: #333;">bs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co1</span><span class="p">)</span> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_c</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">co1</span> <span class="p">`</span><span class="n" style="color: #333;">mkTransCo</span><span class="p">`</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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1582
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<pre style="margin: 0;">-<span id="LC1582" class="line" lang="haskell"> <span class="n" style="color: #333;">go_c</span> <span class="n" style="color: #333;">bs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_lam</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span></span>
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1583
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<pre style="margin: 0;">-<span id="LC1583" class="line" lang="haskell"> <span class="n" style="color: #333;">go_c</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">bs</span><span class="p">,</span> <span class="n" style="color: #333;">mkCast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1584
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<pre style="margin: 0;">-<span id="LC1584" class="line" lang="haskell"></span>
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<td class="diff-line-num old old_line" data-linenumber="1585" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
1585
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<td class="diff-line-num new_line old" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1585" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We are in a lambda under a cast; peel off lambdas and build a</span></span>
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1586
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<pre style="margin: 0;">-<span id="LC1586" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- new coercion for the body.</span></span>
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1587
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<pre style="margin: 0;">-<span id="LC1587" class="line" lang="haskell"> <span class="n" style="color: #333;">go_lam</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoercionR</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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1588
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<pre style="margin: 0;">-<span id="LC1588" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (go_lam bs b e c) is same as (go_c bs (\b.e) c)</span></span>
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1589
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<pre style="margin: 0;">-<span id="LC1589" class="line" lang="haskell"> <span class="n" style="color: #333;">go_lam</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span></span>
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1590
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<pre style="margin: 0;">-<span id="LC1590" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isTyVar</span> <span class="n" style="color: #333;">b</span></span>
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1591
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<pre style="margin: 0;">-<span id="LC1591" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">tyL</span> <span class="n" style="color: #333;">tyR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1592
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<pre style="margin: 0;">-<span id="LC1592" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">isForAllTy_ty</span> <span class="n" style="color: #333;">tyL</span> <span class="p">)</span></span>
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1593
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<pre style="margin: 0;">-<span id="LC1593" class="line" lang="haskell"> <span class="n" style="color: #333;">isForAllTy_ty</span> <span class="n" style="color: #333;">tyR</span></span>
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1594
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<pre style="margin: 0;">-<span id="LC1594" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkNthCo</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [collectBindersPushingCo]</span></span>
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1595
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<pre style="margin: 0;">-<span id="LC1595" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_c</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">bs</span><span class="p">)</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">mkInstCo</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">mkNomReflCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyVarTy</span> <span class="n" style="color: #333;">b</span><span class="p">)))</span></span>
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1596
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<pre style="margin: 0;">-<span id="LC1596" class="line" lang="haskell"></span>
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1597
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<pre style="margin: 0;">-<span id="LC1597" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isCoVar</span> <span class="n" style="color: #333;">b</span></span>
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1598
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<pre style="margin: 0;">-<span id="LC1598" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">tyL</span> <span class="n" style="color: #333;">tyR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1599
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<pre style="margin: 0;">-<span id="LC1599" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">isForAllTy_co</span> <span class="n" style="color: #333;">tyL</span> <span class="p">)</span></span>
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1600
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<pre style="margin: 0;">-<span id="LC1600" class="line" lang="haskell"> <span class="n" style="color: #333;">isForAllTy_co</span> <span class="n" style="color: #333;">tyR</span></span>
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1601
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<pre style="margin: 0;">-<span id="LC1601" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkNthCo</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [collectBindersPushingCo]</span></span>
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1602
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<pre style="margin: 0;">-<span id="LC1602" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">cov</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkCoVarCo</span> <span class="n" style="color: #333;">b</span></span>
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1603
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<pre style="margin: 0;">-<span id="LC1603" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_c</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">bs</span><span class="p">)</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">mkInstCo</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="n" style="color: #333;">mkNomReflCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkCoercionTy</span> <span class="n" style="color: #333;">cov</span><span class="p">)))</span></span>
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1604
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<pre style="margin: 0;">-<span id="LC1604" class="line" lang="haskell"></span>
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1605
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<pre style="margin: 0;">-<span id="LC1605" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isId</span> <span class="n" style="color: #333;">b</span></span>
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1606
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<pre style="margin: 0;">-<span id="LC1606" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">tyL</span> <span class="n" style="color: #333;">tyR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span></span>
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1607
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<pre style="margin: 0;">-<span id="LC1607" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">isFunTy</span> <span class="n" style="color: #333;">tyL</span><span class="p">)</span> <span class="n" style="color: #333;">isFunTy</span> <span class="n" style="color: #333;">tyR</span></span>
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1608
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<pre style="margin: 0;">-<span id="LC1608" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">co_mult</span><span class="p">,</span> <span class="n" style="color: #333;">co_arg</span><span class="p">,</span> <span class="n" style="color: #333;">co_res</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">decomposeFunCo</span> <span class="kt" style="color: #458; font-weight: 600;">Representational</span> <span class="n" style="color: #333;">co</span></span>
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1609
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<pre style="margin: 0;">-<span id="LC1609" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co_mult</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [collectBindersPushingCo]</span></span>
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1610
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<pre style="margin: 0;">-<span id="LC1610" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflCo</span> <span class="n" style="color: #333;">co_arg</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [collectBindersPushingCo]</span></span>
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1611
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<pre style="margin: 0;">-<span id="LC1611" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_c</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">bs</span><span class="p">)</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co_res</span></span>
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1612
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<pre style="margin: 0;">-<span id="LC1612" class="line" lang="haskell"></span>
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1613
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<pre style="margin: 0;">-<span id="LC1613" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">bs</span><span class="p">,</span> <span class="n" style="color: #333;">mkCast</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1614
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<pre style="margin: 0;">-<span id="LC1614" class="line" lang="haskell"></span>
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1615
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<pre style="margin: 0;">-<span id="LC1615" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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1616
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<pre style="margin: 0;">-<span id="LC1616" class="line" lang="haskell"></span>
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1617
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<pre style="margin: 0;">-<span id="LC1617" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [collectBindersPushingCo]</span></span>
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1618
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<pre style="margin: 0;">-<span id="LC1618" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">-<span id="LC1619" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We just look for coercions of form</span></span>
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<pre style="margin: 0;">-<span id="LC1620" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> <type> # w -> blah</span></span>
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<pre style="margin: 0;">-<span id="LC1621" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(and similarly for foralls) to keep this function simple. We could do</span></span>
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<pre style="margin: 0;">-<span id="LC1622" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">more elaborate stuff, but it'd involve substitution etc.</span></span>
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<pre style="margin: 0;">-<span id="LC1623" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1624" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#708fab0a51bd47227233eda4698e750ff6de66e0"><strong>compiler/GHC/Core/Subst.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -343,6 +343,8 @@ instance Outputable Subst where</td>
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<pre style="margin: 0;"> <span id="LC343" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC344" class="line" lang="haskell"><span class="n" style="color: #333;">substExprSC</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Subst</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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<pre style="margin: 0;"> <span id="LC345" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Just like substExpr, but a no-op if the substitution is empty</span></span>
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<pre style="margin: 0;">+<span id="LC346" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note that this does /not/ replace occurrences of free vars with</span></span>
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<pre style="margin: 0;">+<span id="LC347" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- their canonical representatives in the in-scope set</span></span>
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<pre style="margin: 0;"> <span id="LC348" class="line" lang="haskell"><span class="n" style="color: #333;">substExprSC</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">orig_expr</span></span>
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<pre style="margin: 0;"> <span id="LC349" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isEmptySubst</span> <span class="n" style="color: #333;">subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">orig_expr</span></span>
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<pre style="margin: 0;"> <span id="LC350" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "enter subst-expr" (doc $$ ppr orig_expr) $</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -628,6 +630,9 @@ substIdInfo subst new_id info</td>
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<pre style="margin: 0;"> <span id="LC630" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC631" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------</span></span>
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<pre style="margin: 0;"> <span id="LC632" class="line" lang="haskell"><span class="cd">-- | Substitutes for the 'Id's within an unfolding</span></span>
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<pre style="margin: 0;">+<span id="LC633" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- NB: substUnfolding /discards/ any unfolding without</span></span>
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<pre style="margin: 0;">+<span id="LC634" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- without a Stable source. This is usually what we want,</span></span>
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<pre style="margin: 0;">+<span id="LC635" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- but it may be a bit unexpected</span></span>
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<pre style="margin: 0;"> <span id="LC636" class="line" lang="haskell"><span class="n" style="color: #333;">substUnfolding</span><span class="p">,</span> <span class="n" style="color: #333;">substUnfoldingSC</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Subst</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Unfolding</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Unfolding</span></span>
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<pre style="margin: 0;"> <span id="LC637" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Seq'ing on the returned Unfolding is enough to cause</span></span>
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638
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<pre style="margin: 0;"> <span id="LC638" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- all the substitutions to happen completely</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#e1f1fd9ebe1a9c58f6f2c996009bd7dc94a4926c"><strong>testsuite/tests/perf/compiler/Makefile</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -7,7 +7,3 @@ T4007:</td>
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<pre style="margin: 0;"> <span id="LC7" class="line" lang="make"> <span class="nv" style="color: #008080;">$(RM)</span> <span class="nt" style="color: #000080;">-f</span> T4007.hi T4007.o</span>
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<pre style="margin: 0;"> <span id="LC8" class="line" lang="make"> <span class="s1" style="color: #d14;">'</span><span class="nv" style="color: #008080;">$(TEST_HC)</span><span class="s1" style="color: #d14;">'</span> <span class="nv" style="color: #008080;">$(TEST_HC_OPTS)</span> <span class="nt" style="color: #000080;">-c</span> <span class="nt" style="color: #000080;">-O</span> <span class="nt" style="color: #000080;">-ddump-rule-firings</span> T4007.hs</span>
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="make"></span></pre>
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<pre style="margin: 0;">-<span id="LC10" class="line" lang="make"><span class="nl">T16473</span><span class="o" style="font-weight: 600;">:</span></span>
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<pre style="margin: 0;">-<span id="LC11" class="line" lang="make"> <span class="nv" style="color: #008080;">$(RM)</span> <span class="nt" style="color: #000080;">-f</span> T16473.hi T16473.o</span>
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<pre style="margin: 0;">-<span id="LC12" class="line" lang="make"> <span class="s1" style="color: #d14;">'</span><span class="nv" style="color: #008080;">$(TEST_HC)</span><span class="s1" style="color: #d14;">'</span> <span class="nv" style="color: #008080;">$(TEST_HC_OPTS)</span> <span class="nt" style="color: #000080;">-c</span> <span class="nt" style="color: #000080;">-O</span> <span class="nt" style="color: #000080;">-ddump-rule-firings</span> T16473.hs</span>
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<pre style="margin: 0;">-<span id="LC13" class="line" lang="make"></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#b788976ba3555853d385fd1c6246444c972d749f"><strong>testsuite/tests/perf/compiler/T16473.stdout</strong></a>
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<pre style="margin: 0;">-<span id="LC1" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC2" class="line" lang="plaintext">Rule fired: Class op liftA2 (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">Rule fired: Class op <*> (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">Rule fired: Class op $p1Applicative (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC5" class="line" lang="plaintext">Rule fired: Class op <$ (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC6" class="line" lang="plaintext">Rule fired: Class op <*> (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC7" class="line" lang="plaintext">Rule fired: Class op $p1Applicative (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC8" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC9" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC10" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC11" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC12" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC13" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC14" class="line" lang="plaintext">Rule fired: Class op get (BUILTIN)</span>
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<td class="diff-line-num old old_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
15
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC15" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
16
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC16" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="17" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
17
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC17" class="line" lang="plaintext">Rule fired: Class op >> (BUILTIN)</span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="18" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
18
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC18" class="line" lang="plaintext">Rule fired: Class op put (BUILTIN)</span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="19" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
19
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC19" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
20
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC20" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="21" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
21
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC21" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
22
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC22" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="23" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
23
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC23" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
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</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="24" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
24
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC24" class="line" lang="plaintext">Rule fired: Class op get (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="25" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
25
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC25" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
26
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC26" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="27" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
27
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC27" class="line" lang="plaintext">Rule fired: Class op >> (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="28" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
28
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC28" class="line" lang="plaintext">Rule fired: Class op put (BUILTIN)</span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="29" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
29
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC29" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="30" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
30
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC30" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="31" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
31
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC31" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="32" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
32
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC32" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="33" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
33
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC33" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="34" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
34
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC34" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="35" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
35
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC35" class="line" lang="plaintext">Rule fired: Class op show (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="36" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
36
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC36" class="line" lang="plaintext">Rule fired: Class op mempty (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="37" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
37
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC37" class="line" lang="plaintext">Rule fired: Class op fromInteger (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="38" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
38
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC38" class="line" lang="plaintext">Rule fired: Integer -> Int# (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="39" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
39
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC39" class="line" lang="plaintext">Rule fired: Class op <> (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="40" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
40
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC40" class="line" lang="plaintext">Rule fired: Class op + (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="41" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
41
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC41" class="line" lang="plaintext">Rule fired: Class op enumFromTo (BUILTIN)</span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="42" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
42
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC42" class="line" lang="plaintext">Rule fired: Class op *> (BUILTIN)</span>
</pre>
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</tr>
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<td class="diff-line-num old old_line" data-linenumber="43" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
43
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC43" class="line" lang="plaintext">Rule fired: Class op *> (BUILTIN)</span>
</pre>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="44" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
44
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC44" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="45" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
45
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC45" class="line" lang="plaintext">Rule fired: Class op *> (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="46" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
46
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC46" class="line" lang="plaintext">Rule fired: Class op *> (BUILTIN)</span>
</pre>
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</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="47" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
47
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC47" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
</pre>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="48" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
48
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC48" class="line" lang="plaintext">Rule fired: Class op *> (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="49" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
49
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC49" class="line" lang="plaintext">Rule fired: Class op *> (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="50" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
50
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC50" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="51" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
51
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC51" class="line" lang="plaintext">Rule fired: fold/build (GHC.Base)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="52" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
52
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC52" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="53" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
53
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC53" class="line" lang="plaintext">Rule fired: Class op $p1Applicative (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="54" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
54
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC54" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="55" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
55
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC55" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="56" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
56
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC56" class="line" lang="plaintext">Rule fired: Class op $p1Applicative (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="57" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
57
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC57" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="58" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
58
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC58" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="59" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
59
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC59" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="60" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
60
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC60" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="61" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
61
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC61" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="62" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
62
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC62" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="63" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
63
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC63" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="64" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
64
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC64" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="65" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
65
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC65" class="line" lang="plaintext">Rule fired: ># (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="66" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
66
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC66" class="line" lang="plaintext">Rule fired: ==# (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="67" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
67
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC67" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="68" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
68
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC68" class="line" lang="plaintext">Rule fired: Class op <*> (BUILTIN)</span>
</pre>
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</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="69" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
69
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC69" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
</pre>
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</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="70" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
70
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC70" class="line" lang="plaintext">Rule fired: Class op $p1Applicative (BUILTIN)</span>
</pre>
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</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="71" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
71
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC71" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="72" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
72
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC72" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
</pre>
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</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="73" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
73
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC73" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="74" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
74
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC74" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
</pre>
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</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="75" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
75
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC75" class="line" lang="plaintext">Rule fired: Class op $p1Applicative (BUILTIN)</span>
</pre>
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</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="76" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
76
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC76" class="line" lang="plaintext">Rule fired: SPEC/Main $fMonadStateT_$c>>= @Identity _ (Main)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="77" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
77
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC77" class="line" lang="plaintext">Rule fired: SPEC/Main $fApplicativeStateT_$c<*> @Identity _ (Main)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="78" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
78
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC78" class="line" lang="plaintext">Rule fired: SPEC/Main $fApplicativeStateT_$cpure @Identity _ (Main)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="79" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
79
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC79" class="line" lang="plaintext">Rule fired: SPEC/Main $fFunctorStateT @Identity _ (Main)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="80" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
80
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC80" class="line" lang="plaintext">Rule fired: SPEC/Main $fFunctorStateT_$cfmap @Identity _ (Main)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="81" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
81
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC81" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="82" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
82
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC82" class="line" lang="plaintext">Rule fired: SPEC/Main $fFunctorStateT_$cfmap @Identity _ (Main)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="83" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
83
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC83" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="84" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
84
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC84" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="85" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
85
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC85" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="86" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
86
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC86" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="87" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
87
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC87" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="88" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
88
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC88" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="89" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
89
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC89" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="90" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
90
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC90" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="91" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
91
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC91" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="92" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
92
</td>
<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC92" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC93" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC94" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC95" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC96" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
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<pre style="margin: 0;">-<span id="LC97" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span></pre>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext">5050</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#1c5849d3d6a9f35c35886d7226c1a530fa671709"><strong>testsuite/tests/perf/compiler/T18223.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE PartialTypeSignatures #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE Strict #-}</span></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad.State</span></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="n" style="color: #333;">tester</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MonadState</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">m</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="n" style="color: #333;">tester</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">modify'</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- manyState :: StateT () (StateT () IO) () -> IO ()</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- manyState :: _ -> IO ()</span></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">manyState</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- 1</span></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- 2</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- 3</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- 4</span></span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- 5</span></span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- 6</span></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- 7</span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- 8</span></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- 9</span></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC41" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC42" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC43" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC44" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC45" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC47" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC48" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC49" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC50" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC51" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC52" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC53" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC54" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC55" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC56" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC57" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC59" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC60" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC61" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC62" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC63" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC64" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC65" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC66" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC67" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC68" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC69" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC70" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC71" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC72" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC73" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC74" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">evalStateT</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC75" class="line" lang="haskell"> <span class="p">)</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC76" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC77" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC78" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">manyState</span> <span class="n" style="color: #333;">tester</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="n" style="color: #333;">print</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#fd4a0b65d74153aed8b33b01a04eb3ff7442cd45"><strong>testsuite/tests/perf/compiler/all.T</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -367,7 +367,13 @@ test('T16190',</td>
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<pre style="margin: 0;"> <span id="LC367" class="line" lang="perl"> <span class="nv" style="color: #008080;">multimod_compile</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC368" class="line" lang="perl"> <span class="p">['</span><span class="s1" style="color: #d14;">T16190.hs</span><span class="p">',</span> <span class="p">'</span><span class="s1" style="color: #d14;">-v0</span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC369" class="line" lang="perl"></span>
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<pre style="margin: 0;">-<span id="LC370" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16473</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">makefile_test</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">T16473</span><span class="p">'])</span></span>
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<pre style="margin: 0;">+<span id="LC370" class="line" lang="perl"><span class="c1" style="color: #998; font-style: italic;"># Run this program. If specialisation fails, it'll start to allocate much more</span></span>
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<pre style="margin: 0;">+<span id="LC371" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span> <span class="p">('</span><span class="s1" style="color: #d14;">T16473</span><span class="p">',</span></span>
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<pre style="margin: 0;">+<span id="LC372" class="line" lang="perl"> <span class="p">[</span> <span class="nv" style="color: #008080;">collect_stats</span><span class="p">('</span><span class="s1" style="color: #d14;">bytes allocated</span><span class="p">',</span><span class="mi" style="color: #099;">5</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC373" class="line" lang="perl"> <span class="p">,</span> <span class="nv" style="color: #008080;">only_ways</span><span class="p">(['</span><span class="s1" style="color: #d14;">normal</span><span class="p">'])</span></span>
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<pre style="margin: 0;">+<span id="LC374" class="line" lang="perl"> <span class="p">],</span></span>
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<pre style="margin: 0;">+<span id="LC375" class="line" lang="perl"> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC376" class="line" lang="perl"> <span class="p">['</span><span class="s1" style="color: #d14;">-O2 -flate-specialise</span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC377" class="line" lang="perl"></span>
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<pre style="margin: 0;"> <span id="LC378" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17516</span><span class="p">',</span></span>
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<pre style="margin: 0;"> <span id="LC379" class="line" lang="perl"> <span class="p">[</span> <span class="nv" style="color: #008080;">collect_compiler_stats</span><span class="p">('</span><span class="s1" style="color: #d14;">bytes allocated</span><span class="p">',</span> <span class="mi" style="color: #099;">5</span><span class="p">),</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -415,3 +421,8 @@ test ('T13253-spj',</td>
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<pre style="margin: 0;"> <span id="LC421" class="line" lang="perl"> <span class="p">],</span></span>
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<pre style="margin: 0;"> <span id="LC422" class="line" lang="perl"> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC423" class="line" lang="perl"> <span class="p">['</span><span class="s1" style="color: #d14;">-v0 -O</span><span class="p">'])</span></span>
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<pre style="margin: 0;">+<span id="LC424" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span> <span class="p">('</span><span class="s1" style="color: #d14;">T18223</span><span class="p">',</span></span>
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<pre style="margin: 0;">+<span id="LC425" class="line" lang="perl"> <span class="p">[</span> <span class="nv" style="color: #008080;">collect_compiler_stats</span><span class="p">('</span><span class="s1" style="color: #d14;">bytes allocated</span><span class="p">',</span><span class="mi" style="color: #099;">2</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC426" class="line" lang="perl"> <span class="p">],</span></span>
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<pre style="margin: 0;">+<span id="LC427" class="line" lang="perl"> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC428" class="line" lang="perl"> <span class="p">['</span><span class="s1" style="color: #d14;">-v0 -O</span><span class="p">'])</span></span></pre>
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<li id="4eac8054f8dc90b076e0df14ffea14d1df68e1b4">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#4eac8054f8dc90b076e0df14ffea14d1df68e1b4"><strong>testsuite/tests/printer/T18052a.stderr</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -20,7 +20,7 @@ T18052a.$b:||: = \ (@a) (@b) (x :: a) (y :: b) -> (x, y)</td>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="plaintext">-- RHS size: {terms: 1, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="plaintext">(+++) :: forall {a}. [a] -> [a] -> [a]</span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="plaintext">[GblId]</span>
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<pre style="margin: 0;">-<span id="LC23" class="line" lang="plaintext">(+++) = <span class="idiff left right">(++)</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="plaintext">(+++) = <span class="idiff left right">++</span></span>
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<pre style="margin: 0;"> <span id="LC24" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="plaintext">-- RHS size: {terms: 13, types: 20, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;"> <span id="LC26" class="line" lang="plaintext">T18052a.$m:||:</span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#80069ab3e335f49718f742deb0c488301329eb49"><strong>testsuite/tests/simplCore/should_compile/T17966.stdout</strong></a>
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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"> RULES: "SPEC $cm @()" [0]</span>
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<pre style="margin: 0;"> <span id="LC2" class="line" lang="plaintext"> RULES: "SPEC f @Bool @() @(Maybe Integer)" [0]</span></pre>
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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">"SPEC/T17966 $fShowMaybe_$cshow @Integer"</span>
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<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">"SPEC/T17966 $fShowMaybe_$cshowList @Integer"</span>
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<pre style="margin: 0;">-<span id="LC5" class="line" lang="plaintext">"SPEC/T17966 $fShowMaybe @Integer"</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6de40f83c53c3b1899f7b4912badbe98e4fbde88#74e8fe4df7797f1e4a6a8c126c9397d2ac5f8b31"><strong>testsuite/tests/stranal/should_compile/T18122.stderr</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -13,9 +13,8 @@ Lib.$trModule4 = "main"#</td>
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="plaintext">-- RHS size: {terms: 2, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="plaintext">Lib.$trModule3 :: GHC.Types.TrName</span>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="plaintext">[GblId,</span>
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<pre style="margin: 0;">-<span id="LC16" class="line" lang="plaintext"> Cpr=m1,</span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="plaintext"> Unf=Unf{Src=<vanilla>, TopLvl=True, Value=True, ConLike=True,</span>
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<pre style="margin: 0;">-<span id="LC18" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 10 <span class="idiff left right">2</span>0}]</span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 10 <span class="idiff left right">1</span>0}]</span>
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<pre style="margin: 0;"> <span id="LC18" class="line" lang="plaintext">Lib.$trModule3 = GHC.Types.TrNameS Lib.$trModule4</span>
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<pre style="margin: 0;"> <span id="LC19" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="plaintext">-- RHS size: {terms: 1, types: 0, coercions: 0, joins: 0/0}</span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -28,27 +27,25 @@ Lib.$trModule2 = "Lib"#</td>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="plaintext">-- RHS size: {terms: 2, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="plaintext">Lib.$trModule1 :: GHC.Types.TrName</span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="plaintext">[GblId,</span>
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<pre style="margin: 0;">-<span id="LC31" class="line" lang="plaintext"> Cpr=m1,</span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="plaintext"> Unf=Unf{Src=<vanilla>, TopLvl=True, Value=True, ConLike=True,</span>
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<pre style="margin: 0;">-<span id="LC33" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 10 <span class="idiff left right">2</span>0}]</span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 10 <span class="idiff left right">1</span>0}]</span>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="plaintext">Lib.$trModule1 = GHC.Types.TrNameS Lib.$trModule2</span>
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<pre style="margin: 0;"> <span id="LC33" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC34" class="line" lang="plaintext">-- RHS size: {terms: 3, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;"> <span id="LC35" class="line" lang="plaintext">Lib.$trModule :: GHC.Types.Module</span>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="plaintext">[GblId,</span>
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<pre style="margin: 0;">-<span id="LC39" class="line" lang="plaintext"> Cpr=m1,</span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="plaintext"> Unf=Unf{Src=<vanilla>, TopLvl=True, Value=True, ConLike=True,</span>
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<pre style="margin: 0;">-<span id="LC41" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 10 <span class="idiff left right">3</span>0}]</span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 10 <span class="idiff left right">1</span>0}]</span>
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<pre style="margin: 0;"> <span id="LC39" class="line" lang="plaintext">Lib.$trModule = GHC.Types.Module Lib.$trModule3 Lib.$trModule1</span>
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<pre style="margin: 0;"> <span id="LC40" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC41" class="line" lang="plaintext">-- RHS size: {terms: 1, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;"> <span id="LC42" class="line" lang="plaintext">Lib.$wfoo [InlPrag=NOINLINE]</span>
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<pre style="margin: 0;"> <span id="LC43" class="line" lang="plaintext"> :: GHC.Prim.Int# -> GHC.Prim.Int# -> GHC.Prim.Int#</span>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="plaintext">[GblId, Arity=2, Str=<L,U><L,U>, Unf=OtherCon []]</span>
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<pre style="margin: 0;">-<span id="LC48" class="line" lang="plaintext">Lib.$wfoo = <span class="idiff left right">(GHC.Prim.+#)</span></span>
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<pre style="margin: 0;">+<span id="LC45" class="line" lang="plaintext">Lib.$wfoo = <span class="idiff left right">GHC.Prim.+#</span></span>
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<pre style="margin: 0;"> <span id="LC46" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC47" class="line" lang="plaintext">-- RHS size: {terms: 18, types: 14, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">-<span id="LC51" class="line" lang="plaintext">foo [InlPrag=NOUSERINLINE[<span class="idiff left right">0</span>]] :: (Int, Int) -> Int -> Int</span>
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<pre style="margin: 0;">+<span id="LC48" class="line" lang="plaintext">foo [InlPrag=NOUSERINLINE[<span class="idiff left right">final</span>]] :: (Int, Int) -> Int -> Int</span>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="plaintext">[GblId,</span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="plaintext"> Arity=2,</span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="plaintext"> Str=<S(SL),1*U(1*U(U),A)><S,1*U(U)>,</span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -56,24 +53,25 @@ foo [InlPrag=NOUSERINLINE[0]] :: (Int, Int) -> Int -> Int</td>
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="plaintext"> Unf=Unf{Src=InlineStable, TopLvl=True, Value=True, ConLike=True,</span>
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<pre style="margin: 0;"> <span id="LC54" class="line" lang="plaintext"> WorkFree=True, Expandable=True,</span>
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<pre style="margin: 0;"> <span id="LC55" class="line" lang="plaintext"> Guidance=ALWAYS_IF(arity=2,unsat_ok=True,boring_ok=False)</span>
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<pre style="margin: 0;">-<span id="LC59" class="line" lang="plaintext"> Tmpl= \ (w_sHs [Occ=Once!] :: (Int, Int))</span>
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<pre style="margin: 0;">-<span id="LC60" class="line" lang="plaintext"> (w1_sHt [Occ=Once!] :: Int) -></span>
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<pre style="margin: 0;">-<span id="LC61" class="line" lang="plaintext"> case w_sHs of { (ww1_sHw [Occ=Once!], _ [Occ=Dead]) -></span>
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<pre style="margin: 0;">-<span id="LC62" class="line" lang="plaintext"> case ww1_sHw of { GHC.Types.I# ww4_sHz [Occ=Once] -></span>
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<pre style="margin: 0;">-<span id="LC63" class="line" lang="plaintext"> case w1_sHt of { GHC.Types.I# ww6_sHF [Occ=Once] -></span>
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<pre style="margin: 0;">-<span id="LC64" class="line" lang="plaintext"> case Lib.$wfoo ww4_sHz ww6_sHF of ww7_sHJ [Occ=Once] { __DEFAULT -></span>
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<pre style="margin: 0;">-<span id="LC65" class="line" lang="plaintext"> GHC.Types.I# ww7_sHJ</span>
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<pre style="margin: 0;">+<span id="LC56" class="line" lang="plaintext"> Tmpl= \ (w_sEf [Occ=Once1!] :: (Int, Int))</span>
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<pre style="margin: 0;">+<span id="LC57" class="line" lang="plaintext"> (w1_sEg [Occ=Once1!] :: Int) -></span>
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<pre style="margin: 0;">+<span id="LC58" class="line" lang="plaintext"> case w_sEf of { (ww1_sEj [Occ=Once1!], _ [Occ=Dead]) -></span>
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<pre style="margin: 0;">+<span id="LC59" class="line" lang="plaintext"> case ww1_sEj of { GHC.Types.I# ww4_sEm [Occ=Once1] -></span>
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<pre style="margin: 0;">+<span id="LC60" class="line" lang="plaintext"> case w1_sEg of { GHC.Types.I# ww6_sEs [Occ=Once1] -></span>
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<pre style="margin: 0;">+<span id="LC61" class="line" lang="plaintext"> case Lib.$wfoo ww4_sEm ww6_sEs of ww7_sEw [Occ=Once1]</span>
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<pre style="margin: 0;">+<span id="LC62" class="line" lang="plaintext"> { __DEFAULT -></span>
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<pre style="margin: 0;">+<span id="LC63" class="line" lang="plaintext"> GHC.Types.I# ww7_sEw</span>
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<pre style="margin: 0;"> <span id="LC64" class="line" lang="plaintext"> }</span>
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<pre style="margin: 0;"> <span id="LC65" class="line" lang="plaintext"> }</span>
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<pre style="margin: 0;"> <span id="LC66" class="line" lang="plaintext"> }</span>
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="plaintext"> }}]</span>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="plaintext">foo</span>
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<pre style="margin: 0;">-<span id="LC71" class="line" lang="plaintext"> = \ (w_s<span class="idiff left right">Hs :: (Int, Int)) (w1_sHt</span> :: Int) -></span>
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<pre style="margin: 0;">-<span id="LC72" class="line" lang="plaintext"> case w_s<span class="idiff left right">Hs of { (ww1_sHw, ww2_sHB</span>) -></span>
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<pre style="margin: 0;">-<span id="LC73" class="line" lang="plaintext"> case ww1_s<span class="idiff left right">Hw of { GHC.Types.I# ww4_sHz</span> -></span>
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<pre style="margin: 0;">-<span id="LC74" class="line" lang="plaintext"> case w1_s<span class="idiff left right">Ht of { GHC.Types.I# ww6_sHF</span> -></span>
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<pre style="margin: 0;">-<span id="LC75" class="line" lang="plaintext"> case Lib.$wfoo ww4_s<span class="idiff left right">Hz ww6_sHF of ww7_sHJ</span> { __DEFAULT -></span>
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<pre style="margin: 0;">-<span id="LC76" class="line" lang="plaintext"> GHC.Types.I# ww7_s<span class="idiff left right">HJ</span></span>
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<pre style="margin: 0;">+<span id="LC69" class="line" lang="plaintext"> = \ (w_s<span class="idiff left right">Ef :: (Int, Int)) (w1_sEg</span> :: Int) -></span>
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<pre style="margin: 0;">+<span id="LC70" class="line" lang="plaintext"> case w_s<span class="idiff left right">Ef of { (ww1_sEj, ww2_sEo</span>) -></span>
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<pre style="margin: 0;">+<span id="LC71" class="line" lang="plaintext"> case ww1_s<span class="idiff left right">Ej of { GHC.Types.I# ww4_sEm</span> -></span>
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<pre style="margin: 0;">+<span id="LC72" class="line" lang="plaintext"> case w1_s<span class="idiff left right">Eg of { GHC.Types.I# ww6_sEs</span> -></span>
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<pre style="margin: 0;">+<span id="LC73" class="line" lang="plaintext"> case Lib.$wfoo ww4_s<span class="idiff left right">Em ww6_sEs of ww7_sEw</span> { __DEFAULT -></span>
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<pre style="margin: 0;">+<span id="LC74" class="line" lang="plaintext"> GHC.Types.I# ww7_s<span class="idiff left right">Ew</span></span>
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<pre style="margin: 0;"> <span id="LC75" class="line" lang="plaintext"> }</span>
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<pre style="margin: 0;"> <span id="LC76" class="line" lang="plaintext"> }</span>
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<pre style="margin: 0;"> <span id="LC77" class="line" lang="plaintext"> }</span>
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