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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/4291bddaea3148908c55f235ee8978e1d9aa6f20">4291bdda</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-03T06:28:44-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Major improvements to the specialiser
This patch is joint work of Alexis King and Simon PJ. It does some
significant refactoring of the type-class specialiser. Main highlights:
* We can specialise functions with types like
f :: Eq a => a -> Ord b => b => blah
where the classes aren't all at the front (#16473). Here we can
correctly specialise 'f' based on a call like
f @Int @Bool dEqInt x dOrdBool
This change really happened in an earlier patch
commit 2d0cf6252957b8980d89481ecd0b79891da4b14b
Author: Sandy Maguire <sandy@sandymaguire.me>
Date: Thu May 16 12:12:10 2019 -0400
work that this new patch builds directly on that work, and refactors
it a bit.
* We can specialise functions with implicit parameters (#17930)
g :: (?foo :: Bool, Show a) => a -> String
Previously we could not, but now they behave just like a non-class
argument as in 'f' above.
* We can specialise under-saturated calls, where some (but not all of
the dictionary arguments are provided (#17966). For example, we can
specialise the above 'f' based on a call
map (f @Int dEqInt) xs
even though we don't (and can't) give Ord dictionary.
This may sound exotic, but #17966 is a program from the wild, and
showed significant perf loss for functions like f, if you need
saturation of all dictionaries.
* We fix a buglet in which a floated dictionary had a bogus demand
(#17810), by using zapIdDemandInfo in the NonRec case of specBind.
* A tiny side benefit: we can drop dead arguments to specialised
functions; see Note [Drop dead args from specialisations]
* Fixed a bug in deciding what dictionaries are "interesting"; see
Note [Keep the old dictionaries interesting]
This is all achieved by by building on Sandy Macguire's work in
defining SpecArg, which mkCallUDs uses to describe the arguments of
the call. Main changes:
* Main work is in specHeader, which marched down the [InBndr] from the
function definition and the [SpecArg] from the call site, together.
* specCalls no longer has an arity check; the entire mechanism now
handles unders-saturated calls fine.
* mkCallUDs decides on an argument-by-argument basis whether to
specialise a particular dictionary argument; this is new.
See mk_spec_arg in mkCallUDs.
It looks as if there are many more lines of code, but I think that
all the extra lines are comments!
</pre>
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<h4>15 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#d52bc1e90d7432064a2998de2a2751b6fecb7680">
compiler/GHC/Core/Op/Specialise.hs
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<li class="file-stats">
<a href="#708fab0a51bd47227233eda4698e750ff6de66e0">
compiler/GHC/Core/Subst.hs
</a>
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<li class="file-stats">
<a href="#2811a7297b8aa206197ac1f5dabd0818e3c7ec5a">
compiler/GHC/Core/Unfold.hs
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<li class="file-stats">
<a href="#65e2067fbb7377818b6cadff0531f44029499948">
compiler/GHC/HsToCore/Binds.hs
</a>
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<li class="file-stats">
<a href="#b788976ba3555853d385fd1c6246444c972d749f">
testsuite/tests/perf/compiler/T16473.stdout
</a>
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<li class="file-stats">
<a href="#11ca6c36a465280185664c54bed1de3cf206b723">
testsuite/tests/simplCore/should_compile/Makefile
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<li class="file-stats">
<a href="#699a7cef319506d4397c5c89ec1749a67bc44f15">
<span class="new-file">
+
testsuite/tests/simplCore/should_compile/T17810.hs
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<li class="file-stats">
<a href="#e058b4b1c4c25d98dca9acd8fa1abfc98cad6b76">
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testsuite/tests/simplCore/should_compile/T17810a.hs
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<li class="file-stats">
<a href="#43c0f6579da9b204cd0428d01583284f3a664318">
<span class="new-file">
+
testsuite/tests/simplCore/should_compile/T17930.hs
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</li>
<li class="file-stats">
<a href="#6f10bc7839f7d9c02bcf85ea8c4a1d78c7e24b6b">
<span class="new-file">
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testsuite/tests/simplCore/should_compile/T17930.stderr
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<li class="file-stats">
<a href="#64823618efc680c643e35be19ed0003b17073274">
<span class="new-file">
+
testsuite/tests/simplCore/should_compile/T17966.hs
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<li class="file-stats">
<a href="#80069ab3e335f49718f742deb0c488301329eb49">
<span class="new-file">
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testsuite/tests/simplCore/should_compile/T17966.stdout
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</li>
<li class="file-stats">
<a href="#fc07c260b75644727a8cdc1af5c861a44d4bfb5e">
testsuite/tests/simplCore/should_compile/all.T
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</li>
<li class="file-stats">
<a href="#3474e9ac695d7ceebc16e593e4828f6fd84db3df">
<span class="new-file">
+
testsuite/tests/simplCore/should_compile/spec004.hs
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<li class="file-stats">
<a href="#c114c4cec1a70bccc37179d5c97b4c7d09c7b975">
<span class="new-file">
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testsuite/tests/simplCore/should_compile/spec004.stderr
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</a>
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<h4>Changes:</h4>
<li id="d52bc1e90d7432064a2998de2a2751b6fecb7680">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#d52bc1e90d7432064a2998de2a2751b6fecb7680"><strong>compiler/GHC/Core/Op/Specialise.hs</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="22" 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">@@ -22,7 +22,7 @@ import GHC.Core.Predicate</td>
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<td class="diff-line-num old_line" data-linenumber="22" 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="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Module</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Module</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">HasModule</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">)</span> <span class="p">)</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="23" 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="LC23" 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>
</pre>
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<td class="diff-line-num new_line" data-linenumber="24" 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="LC24" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Op.Monad</span></span>
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<td class="diff-line-num new_line old" 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">
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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="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">GHC.Core.Subst</span></span>
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<td class="diff-line-num new old_line" data-linenumber="26" 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="25" 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="LC25" 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="idiff left"> </span><span class="k" style="font-weight: 600;"><span class="idiff">as</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">Core</span></span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="26" 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="LC26" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Unfold</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="27" 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="LC27" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="28" 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="LC28" 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>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="30" 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="30" 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">@@ -30,13 +30,15 @@ import GHC.Types.Var.Env</td>
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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</span></span>
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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">
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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.Rules</span></span>
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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">
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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.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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<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">
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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.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;">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="LC33" 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="LC34" 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="LC35" 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="LC36" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.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.Types.Unique.Supply</span></span>
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<pre style="margin: 0;"> <span id="LC38" 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="LC39" 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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<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;">Maybes</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">mapMaybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isJust</span> <span class="p">)</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;">TysPrim</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">voidPrimTy</span> <span class="p">)</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;">Maybes</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">mapMaybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">maybeToList</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isJust</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;">MonadUtils</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">foldlM</span> <span class="p">)</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.Basic</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.Driver.Types</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">@@ -606,7 +608,7 @@ specProgram guts@(ModGuts { mg_module = this_mod</td>
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606
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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;">-- accidentally re-use a unique that's already in use</span></span>
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607
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609
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<pre style="margin: 0;"> <span id="LC609" 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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610
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<pre style="margin: 0;"> <span id="LC610" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- decls were mutually recursive</span></span>
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609
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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;"><span class="idiff left">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></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;">$</span></span>
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<pre style="margin: 0;">+<span id="LC611" class="line" lang="haskell"> <span class="n" style="color: #333;">top_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SE</span> <span class="p">{</span> <span class="n" style="color: #333;">se_subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">mkEmptySubst</span> <span class="o" style="font-weight: 600;">$</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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610
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612
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<pre style="margin: 0;"> <span id="LC612" 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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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;">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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612
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614
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<pre style="margin: 0;"> <span id="LC614" 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">@@ -636,189 +638,12 @@ bitten by such instances to revert to the pre-7.10 behavior.</td>
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<pre style="margin: 0;"> <span id="LC638" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">See #10491</span></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>
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<pre style="margin: 0;">-<span id="LC639" class="line" lang="haskell"><span class="cd">-- | An argument that we might want to specialise.</span></span>
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<pre style="margin: 0;">-<span id="LC640" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialising Calls] for the nitty gritty details.</span></span>
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<pre style="margin: 0;">-<span id="LC641" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">SpecArg</span></span>
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<pre style="margin: 0;">-<span id="LC642" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC643" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Type arguments that should be specialised, due to appearing</span></span>
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<pre style="margin: 0;">-<span id="LC644" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- free in the type of a 'SpecDict'.</span></span>
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<pre style="margin: 0;">-<span id="LC645" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">SpecType</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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<pre style="margin: 0;">-<span id="LC646" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Type arguments that should remain polymorphic.</span></span>
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<pre style="margin: 0;">-<span id="LC647" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecType</span></span>
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<pre style="margin: 0;">-<span id="LC648" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Dictionaries that should be specialised.</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="kt" style="color: #458; font-weight: 600;">SpecDict</span> <span class="kt" style="color: #458; font-weight: 600;">DictExpr</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;">-- | Value arguments that should not be specialised.</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="kt" style="color: #458; font-weight: 600;">UnspecArg</span></span>
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<pre style="margin: 0;">-<span id="LC652" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC653" 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;">SpecArg</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC654" 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;">SpecType</span> <span class="n" style="color: #333;">t</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;">"SpecType"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">t</span></span>
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<pre style="margin: 0;">-<span id="LC655" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecType</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"UnspecType"</span></span>
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<pre style="margin: 0;">-<span id="LC656" 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;">SpecDict</span> <span class="n" style="color: #333;">d</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;">"SpecDict"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">d</span></span>
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<pre style="margin: 0;">-<span id="LC657" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecArg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"UnspecArg"</span></span>
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<pre style="margin: 0;">-<span id="LC658" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC659" class="line" lang="haskell"><span class="n" style="color: #333;">getSpecDicts</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">SpecArg</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;">DictExpr</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC660" class="line" lang="haskell"><span class="n" style="color: #333;">getSpecDicts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapMaybe</span> <span class="n" style="color: #333;">go</span></span>
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661
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<pre style="margin: 0;">-<span id="LC661" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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662
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<pre style="margin: 0;">-<span id="LC662" 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;">SpecDict</span> <span class="n" style="color: #333;">d</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="n" style="color: #333;">d</span></span>
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663
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<pre style="margin: 0;">-<span id="LC663" class="line" lang="haskell"> <span class="n" style="color: #333;">go</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;">Nothing</span></span>
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664
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<pre style="margin: 0;">-<span id="LC664" class="line" lang="haskell"></span>
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665
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<pre style="margin: 0;">-<span id="LC665" class="line" lang="haskell"><span class="n" style="color: #333;">getSpecTypes</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">SpecArg</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;">Type</span><span class="p">]</span></span>
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666
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<pre style="margin: 0;">-<span id="LC666" class="line" lang="haskell"><span class="n" style="color: #333;">getSpecTypes</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapMaybe</span> <span class="n" style="color: #333;">go</span></span>
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667
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<pre style="margin: 0;">-<span id="LC667" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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668
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<pre style="margin: 0;">-<span id="LC668" 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;">SpecType</span> <span class="n" style="color: #333;">t</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="n" style="color: #333;">t</span></span>
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669
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<pre style="margin: 0;">-<span id="LC669" class="line" lang="haskell"> <span class="n" style="color: #333;">go</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;">Nothing</span></span>
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670
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<pre style="margin: 0;">-<span id="LC670" class="line" lang="haskell"></span>
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671
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<pre style="margin: 0;">-<span id="LC671" class="line" lang="haskell"><span class="n" style="color: #333;">isUnspecArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SpecArg</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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672
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<pre style="margin: 0;">-<span id="LC672" class="line" lang="haskell"><span class="n" style="color: #333;">isUnspecArg</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecArg</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="LC673" class="line" lang="haskell"><span class="n" style="color: #333;">isUnspecArg</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecType</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="LC674" class="line" lang="haskell"><span class="n" style="color: #333;">isUnspecArg</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="LC675" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC676" class="line" lang="haskell"><span class="n" style="color: #333;">isValueArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SpecArg</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="LC677" class="line" lang="haskell"><span class="n" style="color: #333;">isValueArg</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecArg</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="LC678" class="line" lang="haskell"><span class="n" style="color: #333;">isValueArg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SpecDict</span> <span class="kr" style="font-weight: 600;">_</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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679
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<pre style="margin: 0;">-<span id="LC679" class="line" lang="haskell"><span class="n" style="color: #333;">isValueArg</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="LC680" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC681" class="line" lang="haskell"><span class="cd">-- | Given binders from an original function 'f', and the 'SpecArg's</span></span>
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<pre style="margin: 0;">-<span id="LC682" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- corresponding to its usage, compute everything necessary to build</span></span>
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<pre style="margin: 0;">-<span id="LC683" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a specialisation.</span></span>
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<pre style="margin: 0;">-<span id="LC684" 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="LC685" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We will use a running example. Consider the function</span></span>
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<pre style="margin: 0;">-<span id="LC686" 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="LC687" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- foo :: forall a b. Eq a => Int -> blah</span></span>
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<pre style="margin: 0;">-<span id="LC688" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- foo @a @b dEqA i = blah</span></span>
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<pre style="margin: 0;">-<span id="LC689" 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="LC690" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- which is called with the 'CallInfo'</span></span>
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<pre style="margin: 0;">-<span id="LC691" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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692
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<pre style="margin: 0;">-<span id="LC692" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- [SpecType T1, UnspecType, SpecDict dEqT1, UnspecArg]</span></span>
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693
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<pre style="margin: 0;">-<span id="LC693" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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694
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<pre style="margin: 0;">-<span id="LC694" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We'd eventually like to build the RULE</span></span>
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<pre style="margin: 0;">-<span id="LC695" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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696
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<pre style="margin: 0;">-<span id="LC696" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- RULE "SPEC foo @T1 _"</span></span>
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697
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<pre style="margin: 0;">-<span id="LC697" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- forall @a @b (dEqA' :: Eq a).</span></span>
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698
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<pre style="margin: 0;">-<span id="LC698" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- foo @T1 @b dEqA' = $sfoo @b</span></span>
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699
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<pre style="margin: 0;">-<span id="LC699" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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700
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<pre style="margin: 0;">-<span id="LC700" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- and the specialisation '$sfoo'</span></span>
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701
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<pre style="margin: 0;">-<span id="LC701" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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702
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<pre style="margin: 0;">-<span id="LC702" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- $sfoo :: forall b. Int -> blah</span></span>
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703
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<pre style="margin: 0;">-<span id="LC703" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- $sfoo @b = \i -> SUBST[a->T1, dEqA->dEqA'] blah</span></span>
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704
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<pre style="margin: 0;">-<span id="LC704" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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705
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<pre style="margin: 0;">-<span id="LC705" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The cases for 'specHeader' below are presented in the same order as this</span></span>
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<pre style="margin: 0;">-<span id="LC706" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- running example. The result of 'specHeader' for this example is as follows:</span></span>
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<pre style="margin: 0;">-<span id="LC707" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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708
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<pre style="margin: 0;">-<span id="LC708" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ( -- Returned arguments</span></span>
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709
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<pre style="margin: 0;">-<span id="LC709" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- env + [a -> T1, deqA -> dEqA']</span></span>
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710
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<pre style="margin: 0;">-<span id="LC710" 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="LC711" 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="LC712" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- -- RULE helpers</span></span>
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713
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<pre style="margin: 0;">-<span id="LC713" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [b, dx', i]</span></span>
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<pre style="margin: 0;">-<span id="LC714" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [T1, b, dx', i]</span></span>
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<pre style="margin: 0;">-<span id="LC715" 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="LC716" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- -- Specialised function helpers</span></span>
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717
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<pre style="margin: 0;">-<span id="LC717" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [b, i]</span></span>
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<pre style="margin: 0;">-<span id="LC718" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [dx]</span></span>
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<pre style="margin: 0;">-<span id="LC719" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [T1, b, dx_spec, i]</span></span>
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720
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<pre style="margin: 0;">-<span id="LC720" 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="LC721" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span></span>
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<pre style="margin: 0;">-<span id="LC722" 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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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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBndr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- The binders from the original function 'f'</span></span>
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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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">SpecArg</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- From the CallInfo</span></span>
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<pre style="margin: 0;">-<span id="LC725" 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="p">(</span> <span class="c1" style="color: #998; font-style: italic;">-- Returned arguments</span></span>
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<pre style="margin: 0;">-<span id="LC726" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span> <span class="c1" style="color: #998; font-style: italic;">-- Substitution to apply to the body of 'f'</span></span>
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<pre style="margin: 0;">-<span id="LC727" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBndr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- All the remaining unspecialised args from the original function 'f'</span></span>
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728
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<pre style="margin: 0;">-<span id="LC728" class="line" lang="haskell"></span>
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729
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<pre style="margin: 0;">-<span id="LC729" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- RULE helpers</span></span>
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730
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<pre style="margin: 0;">-<span id="LC730" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBndr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Binders for the RULE</span></span>
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<td class="diff-line-num old old_line" data-linenumber="731" 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">
731
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<pre style="margin: 0;">-<span id="LC731" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreArg</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Args for the LHS of the rule</span></span>
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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="c1" style="color: #998; font-style: italic;">-- Specialised function helpers</span></span>
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734
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<td class="diff-line-num new_line old" data-linenumber="641" 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="LC734" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBndr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Binders for $sf</span></span>
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<td class="diff-line-num old old_line" data-linenumber="735" 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">
735
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<td class="diff-line-num new_line old" data-linenumber="641" 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="LC735" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">DictBind</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Auxiliary dictionary bindings</span></span>
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736
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<td class="diff-line-num new_line old" data-linenumber="641" 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="LC736" 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;">-- Specialised arguments for unfolding</span></span>
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737
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<pre style="margin: 0;">-<span id="LC737" class="line" lang="haskell"> <span class="p">)</span></span>
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738
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<pre style="margin: 0;">-<span id="LC738" class="line" lang="haskell"></span>
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739
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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 want to specialise on type 'T1', and so we must construct a substitution</span></span>
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740
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<pre style="margin: 0;">-<span id="LC740" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'a->T1', as well as a LHS argument for the resulting RULE and unfolding</span></span>
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741
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<pre style="margin: 0;">-<span id="LC741" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- details.</span></span>
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<pre style="margin: 0;">-<span id="LC742" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SpecType</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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743
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<pre style="margin: 0;">-<span id="LC743" 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;">env'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendTvSubstList</span> <span class="n" style="color: #333;">env</span> <span class="p">[(</span><span class="n" style="color: #333;">bndr</span><span class="p">,</span> <span class="n" style="color: #333;">t</span><span class="p">)]</span></span>
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744
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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;">env''</span><span class="p">,</span> <span class="n" style="color: #333;">unused_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_bs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_es</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">,</span> <span class="n" style="color: #333;">dx</span><span class="p">,</span> <span class="n" style="color: #333;">spec_args</span><span class="p">)</span></span>
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745
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<pre style="margin: 0;">-<span id="LC745" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">args</span></span>
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746
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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;">pure</span> <span class="p">(</span> <span class="n" style="color: #333;">env''</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;">unused_bndrs</span></span>
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748
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<pre style="margin: 0;">-<span id="LC748" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">rule_bs</span></span>
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<td class="diff-line-num old old_line" data-linenumber="749" 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">
749
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<td class="diff-line-num new_line old" data-linenumber="641" 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="LC749" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_es</span></span>
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750
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<pre style="margin: 0;">-<span id="LC750" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">bs'</span></span>
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<pre style="margin: 0;">-<span id="LC751" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">dx</span></span>
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<pre style="margin: 0;">-<span id="LC752" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">spec_args</span></span>
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<pre style="margin: 0;">-<span id="LC753" class="line" lang="haskell"> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC754" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC755" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC756" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Next we have a type that we don't want to specialise. We need to perform</span></span>
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<pre style="margin: 0;">-<span id="LC757" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a substitution on it (in case the type refers to 'a'). Additionally, we need</span></span>
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<pre style="margin: 0;">-<span id="LC758" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- to produce a binder, LHS argument and RHS argument for the resulting rule,</span></span>
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<pre style="margin: 0;">-<span id="LC759" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- /and/ a binder for the specialised body.</span></span>
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<pre style="margin: 0;">-<span id="LC760" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnspecType</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC761" 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;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">bndr'</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;">env</span> <span class="n" style="color: #333;">bndr</span></span>
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<pre style="margin: 0;">-<span id="LC762" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">env''</span><span class="p">,</span> <span class="n" style="color: #333;">unused_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_bs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_es</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">,</span> <span class="n" style="color: #333;">dx</span><span class="p">,</span> <span class="n" style="color: #333;">spec_args</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC763" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;">-<span id="LC764" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span> <span class="n" style="color: #333;">env''</span></span>
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<pre style="margin: 0;">-<span id="LC765" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">unused_bndrs</span></span>
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<pre style="margin: 0;">-<span id="LC766" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_bs</span></span>
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<pre style="margin: 0;">-<span id="LC767" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_es</span></span>
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<pre style="margin: 0;">-<span id="LC768" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bs'</span></span>
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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;">dx</span></span>
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<pre style="margin: 0;">-<span id="LC770" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">spec_args</span></span>
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<pre style="margin: 0;">-<span id="LC771" class="line" lang="haskell"> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC772" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC773" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC774" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Next we want to specialise the 'Eq a' dict away. We need to construct</span></span>
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<pre style="margin: 0;">-<span id="LC775" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a wildcard binder to match the dictionary (See Note [Specialising Calls] for</span></span>
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<pre style="margin: 0;">-<span id="LC776" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the nitty-gritty), as a LHS rule and unfolding details.</span></span>
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<pre style="margin: 0;">-<span id="LC777" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SpecDict</span> <span class="n" style="color: #333;">d</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC778" 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;">inst_dict_id</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newDictBndr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bndr</span></span>
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<pre style="margin: 0;">-<span id="LC779" 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;">rhs_env2</span><span class="p">,</span> <span class="n" style="color: #333;">dx_binds</span><span class="p">,</span> <span class="n" style="color: #333;">spec_dict_args'</span><span class="p">)</span></span>
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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;">bindAuxiliaryDicts</span> <span class="n" style="color: #333;">env</span> <span class="p">[</span><span class="n" style="color: #333;">bndr</span><span class="p">]</span> <span class="p">[</span><span class="n" style="color: #333;">d</span><span class="p">]</span> <span class="p">[</span><span class="n" style="color: #333;">inst_dict_id</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC781" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">unused_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_bs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_es</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">,</span> <span class="n" style="color: #333;">dx</span><span class="p">,</span> <span class="n" style="color: #333;">spec_args</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC782" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">rhs_env2</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;">-<span id="LC783" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span> <span class="n" style="color: #333;">env'</span></span>
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784
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<pre style="margin: 0;">-<span id="LC784" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">unused_bndrs</span></span>
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785
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<pre style="margin: 0;">-<span id="LC785" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Evidence foralls]</span></span>
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<pre style="margin: 0;">-<span id="LC786" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">exprFreeIdsList</span> <span class="p">(</span><span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">inst_dict_id</span><span class="p">)</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">rule_bs</span></span>
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787
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<pre style="margin: 0;">-<span id="LC787" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">inst_dict_id</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_es</span></span>
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788
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<pre style="margin: 0;">-<span id="LC788" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">bs'</span></span>
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<pre style="margin: 0;">-<span id="LC789" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">dx_binds</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">dx</span></span>
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<pre style="margin: 0;">-<span id="LC790" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">spec_dict_args'</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">spec_args</span></span>
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<pre style="margin: 0;">-<span id="LC791" class="line" lang="haskell"> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC792" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC793" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC794" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Finally, we have the unspecialised argument 'i'. We need to produce</span></span>
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<pre style="margin: 0;">-<span id="LC795" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a binder, LHS and RHS argument for the RULE, and a binder for the</span></span>
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<pre style="margin: 0;">-<span id="LC796" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- specialised body.</span></span>
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797
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<pre style="margin: 0;">-<span id="LC797" 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="LC798" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- NB: Calls to 'specHeader' will trim off any trailing 'UnspecArg's, which is</span></span>
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799
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<pre style="margin: 0;">-<span id="LC799" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- why 'i' doesn't appear in our RULE above. But we have no guarantee that</span></span>
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800
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<pre style="margin: 0;">-<span id="LC800" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- there aren't 'UnspecArg's which come /before/ all of the dictionaries, so</span></span>
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801
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<pre style="margin: 0;">-<span id="LC801" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- this case must be here.</span></span>
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<pre style="margin: 0;">-<span id="LC802" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnspecArg</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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803
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<pre style="margin: 0;">-<span id="LC803" 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;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">bndr'</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;">env</span> <span class="n" style="color: #333;">bndr</span></span>
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804
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<pre style="margin: 0;">-<span id="LC804" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">env''</span><span class="p">,</span> <span class="n" style="color: #333;">unused_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_bs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_es</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">,</span> <span class="n" style="color: #333;">dx</span><span class="p">,</span> <span class="n" style="color: #333;">spec_args</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC805" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">args</span></span>
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806
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<pre style="margin: 0;">-<span id="LC806" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span> <span class="n" style="color: #333;">env''</span></span>
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807
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<pre style="margin: 0;">-<span id="LC807" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">unused_bndrs</span></span>
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808
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<pre style="margin: 0;">-<span id="LC808" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_bs</span></span>
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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;">varToCoreExpr</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_es</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;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bs'</span></span>
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<pre style="margin: 0;">-<span id="LC811" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">dx</span></span>
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<pre style="margin: 0;">-<span id="LC812" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">spec_args</span></span>
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813
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<pre style="margin: 0;">-<span id="LC813" class="line" lang="haskell"> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC814" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC815" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC816" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Return all remaining binders from the original function. These have the</span></span>
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<pre style="margin: 0;">-<span id="LC817" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- invariant that they should all correspond to unspecialised arguments, so</span></span>
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<pre style="margin: 0;">-<span id="LC818" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- it's safe to stop processing at this point.</span></span>
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<pre style="margin: 0;">-<span id="LC819" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bndrs</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;">pure</span> <span class="p">(</span><span class="n" style="color: #333;">env</span><span class="p">,</span> <span class="n" style="color: #333;">bndrs</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="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="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC820" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="n" style="color: #333;">env</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="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="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="LC641" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC642" 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="LC643" 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="LC644" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Specialising imported functions</span></span>
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<pre style="margin: 0;">+<span id="LC645" 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="LC646" 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="LC647" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC648" 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="LC649" 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;">DynFlags</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">@@ -1035,7 +860,7 @@ Avoiding this recursive specialisation loop is the reason for the</td>
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<pre style="margin: 0;"> <span id="LC860" 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="LC861" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC862" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span></span>
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<pre style="margin: 0;">-<span id="LC1038" class="line" lang="haskell"> <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;"><span class="idiff left">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Subst</span></span>
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<pre style="margin: 0;">+<span id="LC863" class="line" lang="haskell"> <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;"><span class="idiff left right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Subst</span></span>
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<pre style="margin: 0;"> <span id="LC864" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We carry a substitution down:</span></span>
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<pre style="margin: 0;"> <span id="LC865" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- a) we must clone any binding that might float outwards,</span></span>
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<pre style="margin: 0;"> <span id="LC866" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- to avoid name clashes</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">@@ -1049,8 +874,14 @@ data SpecEnv</td>
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<pre style="margin: 0;"> <span id="LC874" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Interesting dictionary arguments]</span></span>
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<pre style="margin: 0;"> <span id="LC875" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC876" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC877" 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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<pre style="margin: 0;">+<span id="LC878" 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;">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="n" style="color: #333;">subst</span><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;">interesting</span> <span class="p">})</span></span>
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<pre style="margin: 0;">+<span id="LC879" 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;">"SE"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">braces</span> <span class="p">(</span><span class="n" style="color: #333;">sep</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">comma</span></span>
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<pre style="margin: 0;">+<span id="LC880" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"subst ="</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">subst</span></span>
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<pre style="margin: 0;">+<span id="LC881" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"interesting ="</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">interesting</span> <span class="p">])</span></span>
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<pre style="margin: 0;">+<span id="LC882" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC883" class="line" lang="haskell"><span class="n" style="color: #333;">specVar</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;">CoreExpr</span></span>
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<pre style="margin: 0;">-<span id="LC1053" class="line" lang="haskell"><span class="n" style="color: #333;">specVar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">lookupIdSubst</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"specVar"</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;">+<span id="LC884" class="line" lang="haskell"><span class="n" style="color: #333;">specVar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">lookupIdSubst</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"specVar"</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;"> <span id="LC885" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC886" class="line" lang="haskell"><span class="n" style="color: #333;">specExpr</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;">CoreExpr</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;">CoreExpr</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="LC887" 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">@@ -1080,12 +911,10 @@ specExpr env expr@(App {})</td>
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<pre style="margin: 0;"> <span id="LC911" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">other</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">specExpr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">other</span></span>
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<pre style="margin: 0;"> <span id="LC912" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC913" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">---------------- Lambda/case require dumping of usage details --------------------</span></span>
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<pre style="margin: 0;">-<span id="LC1083" class="line" lang="haskell"><span class="n" style="color: #333;">specExpr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e</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="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">-<span id="LC1084" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">body'</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;">specExpr</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">body</span></span>
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1085
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<pre style="margin: 0;">-<span id="LC1085" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">free_uds</span><span class="p">,</span> <span class="n" style="color: #333;">dumped_dbs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dumpUDs</span> <span class="n" style="color: #333;">bndrs'</span> <span class="n" style="color: #333;">uds</span></span>
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1086
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<pre style="margin: 0;">-<span id="LC1086" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkLams</span> <span class="n" style="color: #333;">bndrs'</span> <span class="p">(</span><span class="n" style="color: #333;">wrapDictBindsE</span> <span class="n" style="color: #333;">dumped_dbs</span> <span class="n" style="color: #333;">body'</span><span class="p">),</span> <span class="n" style="color: #333;">free_uds</span><span class="p">)</span></span>
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914
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<pre style="margin: 0;">+<span id="LC914" class="line" lang="haskell"><span class="n" style="color: #333;">specExpr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e</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="p">{})</span></span>
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915
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<pre style="margin: 0;">+<span id="LC915" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">specLam</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">bndrs'</span> <span class="n" style="color: #333;">body</span></span>
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1087
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916
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<pre style="margin: 0;"> <span id="LC916" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1088
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<pre style="margin: 0;">-<span id="LC1088" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">body</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">collectBinders</span> <span class="n" style="color: #333;">e</span></span>
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917
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<pre style="margin: 0;">+<span id="LC917" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">body</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;">collectBinders</span> <span class="n" style="color: #333;">e</span></span>
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1089
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918
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<pre style="margin: 0;"> <span id="LC918" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">bndrs'</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;">env</span> <span class="n" style="color: #333;">bndrs</span></span>
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1090
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919
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<pre style="margin: 0;"> <span id="LC919" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- More efficient to collect a group of binders together all at once</span></span>
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<pre style="margin: 0;"> <span id="LC920" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- and we don't want to split a lambda group with dumped bindings</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">@@ -1111,6 +940,18 @@ specExpr env (Let bind body)</td>
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<pre style="margin: 0;"> <span id="LC940" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- All done</span></span>
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941
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<pre style="margin: 0;"> <span id="LC941" 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;">foldr</span> <span class="kt" style="color: #458; font-weight: 600;">Let</span> <span class="n" style="color: #333;">body'</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="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC942" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC943" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------</span></span>
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944
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<pre style="margin: 0;">+<span id="LC944" class="line" lang="haskell"><span class="n" style="color: #333;">specLam</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">OutBndr</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">InExpr</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;">OutExpr</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="LC945" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The binders have been substituted, but the body has not</span></span>
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<pre style="margin: 0;">+<span id="LC946" class="line" lang="haskell"><span class="n" style="color: #333;">specLam</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">body</span></span>
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<pre style="margin: 0;">+<span id="LC947" 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;">bndrs</span></span>
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948
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<pre style="margin: 0;">+<span id="LC948" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">specExpr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">body</span></span>
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949
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<pre style="margin: 0;">+<span id="LC949" 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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950
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<pre style="margin: 0;">+<span id="LC950" 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;">body'</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;">specExpr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">body</span></span>
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951
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<pre style="margin: 0;">+<span id="LC951" 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;">free_uds</span><span class="p">,</span> <span class="n" style="color: #333;">dumped_dbs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dumpUDs</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">uds</span></span>
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952
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<pre style="margin: 0;">+<span id="LC952" 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;">mkLams</span> <span class="n" style="color: #333;">bndrs</span> <span class="p">(</span><span class="n" style="color: #333;">wrapDictBindsE</span> <span class="n" style="color: #333;">dumped_dbs</span> <span class="n" style="color: #333;">body'</span><span class="p">),</span> <span class="n" style="color: #333;">free_uds</span><span class="p">)</span> <span class="p">}</span></span>
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953
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<pre style="margin: 0;">+<span id="LC953" class="line" lang="haskell"></span>
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954
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<pre style="margin: 0;">+<span id="LC954" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------</span></span>
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1114
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955
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<pre style="margin: 0;"> <span id="LC955" class="line" lang="haskell"><span class="n" style="color: #333;">specTickish</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;">Tickish</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;">Tickish</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span></span>
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1115
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956
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<pre style="margin: 0;"> <span id="LC956" class="line" lang="haskell"><span class="n" style="color: #333;">specTickish</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Breakpoint</span> <span class="n" style="color: #333;">ix</span> <span class="n" style="color: #333;">ids</span><span class="p">)</span></span>
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1116
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957
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<pre style="margin: 0;"> <span id="LC957" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Breakpoint</span> <span class="n" style="color: #333;">ix</span> <span class="p">[</span> <span class="n" style="color: #333;">id'</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ids</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="o" style="font-weight: 600;"><-</span> <span class="p">[</span><span class="n" style="color: #333;">specVar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">id</span><span class="p">]]</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1118" 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="959" 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">@@ -1118,6 +959,7 @@ specTickish env (Breakpoint ix ids)</td>
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1118
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959
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<pre style="margin: 0;"> <span id="LC959" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- should never happen, but it's harmless to drop them anyway.</span></span>
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1119
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960
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<pre style="margin: 0;"> <span id="LC960" class="line" lang="haskell"><span class="n" style="color: #333;">specTickish</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">other_tickish</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">other_tickish</span></span>
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1120
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961
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<pre style="margin: 0;"> <span id="LC961" class="line" lang="haskell"></span>
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962
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<pre style="margin: 0;">+<span id="LC962" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------</span></span>
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1121
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963
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<pre style="margin: 0;"> <span id="LC963" class="line" lang="haskell"><span class="n" style="color: #333;">specCase</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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1122
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964
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<pre style="margin: 0;"> <span id="LC964" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="c1" style="color: #998; font-style: italic;">-- Scrutinee, already done</span></span>
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1123
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965
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<pre style="margin: 0;"> <span id="LC965" class="line" lang="haskell"> <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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreAlt</span><span class="p">]</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1143" 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="985" 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">@@ -1143,7 +985,7 @@ specCase env scrut' case_bndr [(con, args, rhs)]</td>
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1143
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985
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<pre style="margin: 0;"> <span id="LC985" class="line" lang="haskell"> <span class="n" style="color: #333;">subst_prs</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">case_bndr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">case_bndr_flt</span><span class="p">)</span></span>
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1144
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986
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<pre style="margin: 0;"> <span id="LC986" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">:</span> <span class="p">[</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">sc_flt</span><span class="p">)</span></span>
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987
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<pre style="margin: 0;"> <span id="LC987" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">sc_flt</span><span class="p">)</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;">zip</span><span class="p">`</span> <span class="n" style="color: #333;">mb_sc_flts</span> <span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC1146" class="line" lang="haskell"> <span class="n" style="color: #333;">env_rhs'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env_rhs</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;"><span class="idiff left">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">extendIdSubstList</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env_rhs</span><span class="p">)</span> <span class="n" style="color: #333;">subst_prs</span></span>
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<pre style="margin: 0;">+<span id="LC988" class="line" lang="haskell"> <span class="n" style="color: #333;">env_rhs'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env_rhs</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;"><span class="idiff left right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">extendIdSubstList</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env_rhs</span><span class="p">)</span> <span class="n" style="color: #333;">subst_prs</span></span>
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989
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<pre style="margin: 0;"> <span id="LC989" 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;">se_interesting</span> <span class="n" style="color: #333;">env_rhs</span> <span class="p">`</span><span class="n" style="color: #333;">extendVarSetList</span><span class="p">`</span></span>
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990
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<pre style="margin: 0;"> <span id="LC990" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">case_bndr_flt</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">sc_args_flt</span><span class="p">)</span> <span class="p">}</span></span>
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991
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<pre style="margin: 0;"> <span id="LC991" 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">@@ -1240,7 +1082,13 @@ specBind :: SpecEnv -- Use this for RHSs</td>
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<pre style="margin: 0;"> <span id="LC1082" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- No calls for binders of this bind</span></span>
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<pre style="margin: 0;"> <span id="LC1083" class="line" lang="haskell"><span class="n" style="color: #333;">specBind</span> <span class="n" style="color: #333;">rhs_env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">fn</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span> <span class="n" style="color: #333;">body_uds</span></span>
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<pre style="margin: 0;"> <span id="LC1084" 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;">rhs'</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_uds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specExpr</span> <span class="n" style="color: #333;">rhs_env</span> <span class="n" style="color: #333;">rhs</span></span>
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<pre style="margin: 0;">-<span id="LC1243" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">fn'</span><span class="p">,</span> <span class="n" style="color: #333;">spec_defns</span><span class="p">,</span> <span class="n" style="color: #333;">body_uds1</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specDefn</span> <span class="n" style="color: #333;">rhs_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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<pre style="margin: 0;">+<span id="LC1085" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1086" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">zapped_fn</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">zapIdDemandInfo</span> <span class="n" style="color: #333;">fn</span></span>
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<pre style="margin: 0;">+<span id="LC1087" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We zap the demand info because the binding may float,</span></span>
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<pre style="margin: 0;">+<span id="LC1088" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- which would invaidate the demand info (see #17810 for example).</span></span>
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<pre style="margin: 0;">+<span id="LC1089" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Destroying demand info is not terrible; specialisation is</span></span>
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<pre style="margin: 0;">+<span id="LC1090" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- always followed soon by demand analysis.</span></span>
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<pre style="margin: 0;">+<span id="LC1091" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">fn'</span><span class="p">,</span> <span class="n" style="color: #333;">spec_defns</span><span class="p">,</span> <span class="n" style="color: #333;">body_uds1</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specDefn</span> <span class="n" style="color: #333;">rhs_env</span> <span class="n" style="color: #333;">body_uds</span> <span class="n" style="color: #333;">zapped_fn</span> <span class="n" style="color: #333;">rhs</span></span>
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<pre style="margin: 0;"> <span id="LC1092" class="line" lang="haskell"></span>
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1245
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1093
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<pre style="margin: 0;"> <span id="LC1093" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">pairs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">spec_defns</span> <span class="o" style="font-weight: 600;">++</span> <span class="p">[(</span><span class="n" style="color: #333;">fn'</span><span class="p">,</span> <span class="n" style="color: #333;">rhs'</span><span class="p">)]</span></span>
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1246
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1094
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<pre style="margin: 0;"> <span id="LC1094" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- fn' mentions the spec_defns in its rules,</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1360" 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="1208" 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">@@ -1360,8 +1208,7 @@ type SpecInfo = ( [CoreRule] -- Specialisation rules</td>
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1360
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1208
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<pre style="margin: 0;"> <span id="LC1208" class="line" lang="haskell"></span>
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1361
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1209
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<pre style="margin: 0;"> <span id="LC1209" class="line" lang="haskell"><span class="n" style="color: #333;">specCalls</span> <span class="n" style="color: #333;">mb_mod</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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1362
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<td class="diff-line-num new_line" data-linenumber="1210" 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">
1210
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<pre style="margin: 0;"> <span id="LC1210" 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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1363
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<td class="diff-line-num new_line old" data-linenumber="1211" 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="LC1363" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">callSpecArity</span> <span class="n" style="color: #333;">pis</span> <span class="o" style="font-weight: 600;"><=</span> <span class="n" style="color: #333;">fn_arity</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialisation Must Preserve Sharing]</span></span>
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1364
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<td class="diff-line-num new_line old" data-linenumber="1211" 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="LC1364" 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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<td class="diff-line-num new old_line" data-linenumber="1365" 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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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="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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1365
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1212
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<pre style="margin: 0;"> <span id="LC1212" 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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1366
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1213
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<pre style="margin: 0;"> <span id="LC1213" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Don't specialise NOINLINE things</span></span>
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1367
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1214
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<pre style="margin: 0;"> <span id="LC1214" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Auto-specialisation and RULES]</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1381" 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="1228" 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">@@ -1381,27 +1228,22 @@ specCalls mb_mod env existing_rules calls_for_me fn rhs</td>
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1381
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1228
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<pre style="margin: 0;"> <span id="LC1228" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "specDefn: none" (ppr fn <+> ppr calls_for_me) $</span></span>
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1382
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1229
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<pre style="margin: 0;"> <span id="LC1229" class="line" lang="haskell"> <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="n" style="color: #333;">emptyUDs</span><span class="p">)</span></span>
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1383
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1230
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<pre style="margin: 0;"> <span id="LC1230" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1384
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<td class="diff-line-num new_line old" data-linenumber="1231" 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="LC1384" 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;">sep</span> <span class="p">[</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rhs_tyvars</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rhs_bndrs</span></span>
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1385
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<pre style="margin: 0;">-<span id="LC1385" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</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 class="p">]</span></span>
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1386
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<pre style="margin: 0;">-<span id="LC1386" class="line" lang="haskell"></span>
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1387
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<pre style="margin: 0;">-<span id="LC1387" class="line" lang="haskell"> <span class="n" style="color: #333;">fn_type</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">fn</span></span>
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1388
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<pre style="margin: 0;">-<span id="LC1388" class="line" lang="haskell"> <span class="n" style="color: #333;">fn_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idArity</span> <span class="n" style="color: #333;">fn</span></span>
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1389
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<pre style="margin: 0;">-<span id="LC1389" class="line" lang="haskell"> <span class="n" style="color: #333;">fn_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;">-- Ignore loop-breaker-ness here</span></span>
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<pre style="margin: 0;">-<span id="LC1390" 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="n" style="color: #333;">fn_type</span></span>
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1391
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<pre style="margin: 0;">-<span id="LC1391" class="line" lang="haskell"> <span class="n" style="color: #333;">theta</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getTheta</span> <span class="n" style="color: #333;">pis</span></span>
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1392
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<pre style="margin: 0;">-<span id="LC1392" class="line" lang="haskell"> <span class="n" style="color: #333;">n_dicts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">theta</span></span>
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1393
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<pre style="margin: 0;">-<span id="LC1393" class="line" lang="haskell"> <span class="n" style="color: #333;">inl_prag</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idInlinePragma</span> <span class="n" style="color: #333;">fn</span></span>
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1394
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<pre style="margin: 0;">-<span id="LC1394" 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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1395
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<pre style="margin: 0;">-<span id="LC1395" 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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1231
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<pre style="margin: 0;">+<span id="LC1231" 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;">sep</span> <span class="p">[</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rhs_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</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 class="p">]</span></span>
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1232
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<pre style="margin: 0;">+<span id="LC1232" class="line" lang="haskell"></span>
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1233
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<pre style="margin: 0;">+<span id="LC1233" class="line" lang="haskell"> <span class="n" style="color: #333;">fn_type</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">fn</span></span>
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1234
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<pre style="margin: 0;">+<span id="LC1234" class="line" lang="haskell"> <span class="n" style="color: #333;">fn_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idArity</span> <span class="n" style="color: #333;">fn</span></span>
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1235
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<pre style="margin: 0;">+<span id="LC1235" class="line" lang="haskell"> <span class="n" style="color: #333;">fn_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;">-- Ignore loop-breaker-ness here</span></span>
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1236
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<pre style="margin: 0;">+<span id="LC1236" class="line" lang="haskell"> <span class="n" style="color: #333;">inl_prag</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idInlinePragma</span> <span class="n" style="color: #333;">fn</span></span>
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1237
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<pre style="margin: 0;">+<span id="LC1237" 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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1238
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<pre style="margin: 0;">+<span id="LC1238" 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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1396
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1239
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<pre style="margin: 0;"> <span id="LC1239" class="line" lang="haskell"></span>
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1397
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1240
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<pre style="margin: 0;"> <span id="LC1240" 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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1398
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1241
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<pre style="margin: 0;"> <span id="LC1241" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Inline specialisations]</span></span>
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1399
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1242
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<pre style="margin: 0;"> <span id="LC1242" class="line" lang="haskell"></span>
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1400
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<pre style="margin: 0;">-<span id="LC1400" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">rhs_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_body</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">collectBindersPushingCo</span> <span class="n" style="color: #333;">rhs</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;">-- See Note [Account for casts in binding]</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;">rhs_tyvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">filter</span> <span class="n" style="color: #333;">isTyVar</span> <span class="n" style="color: #333;">rhs_bndrs</span></span>
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1243
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<pre style="margin: 0;">+<span id="LC1243" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">rhs_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_body</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">collectBindersPushingCo</span> <span class="n" style="color: #333;">rhs</span></span>
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1244
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<pre style="margin: 0;">+<span id="LC1244" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Account for casts in binding]</span></span>
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1403
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1245
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<pre style="margin: 0;"> <span id="LC1245" class="line" lang="haskell"></span>
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1404
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<pre style="margin: 0;">-<span id="LC1404" class="line" lang="haskell"> <span class="n" style="color: #333;">in_scope</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substInScope</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1246" class="line" lang="haskell"> <span class="n" style="color: #333;">in_scope</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substInScope</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span></span>
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1405
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1247
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<pre style="margin: 0;"> <span id="LC1247" class="line" lang="haskell"></span>
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1406
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1248
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<pre style="margin: 0;"> <span id="LC1248" class="line" lang="haskell"> <span class="n" style="color: #333;">already_covered</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreRule</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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1407
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1249
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<pre style="margin: 0;"> <span id="LC1249" class="line" lang="haskell"> <span class="n" style="color: #333;">already_covered</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">new_rules</span> <span class="n" style="color: #333;">args</span> <span class="c1" style="color: #998; font-style: italic;">-- Note [Specialisations already covered]</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1416" 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">@@ -1416,38 +1258,43 @@ specCalls mb_mod env existing_rules calls_for_me fn rhs</td>
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1416
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<pre style="margin: 0;"> <span id="LC1258" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_call</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SpecInfo</span> <span class="c1" style="color: #998; font-style: italic;">-- Accumulating parameter</span></span>
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1417
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<pre style="margin: 0;"> <span id="LC1259" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CallInfo</span> <span class="c1" style="color: #998; font-style: italic;">-- Call instance</span></span>
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<pre style="margin: 0;"> <span id="LC1260" 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="kt" style="color: #458; font-weight: 600;">SpecInfo</span></span>
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<pre style="margin: 0;">-<span id="LC1419" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_call</span> <span class="n" style="color: #333;">spec_acc</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">rules_acc</span><span class="p">,</span> <span class="n" style="color: #333;">pairs_acc</span><span class="p">,</span> <span class="n" style="color: #333;">uds_acc</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 class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CI</span> <span class="p">{</span> <span class="n" style="color: #333;">ci_key</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">call_args</span><span class="p">,</span> <span class="n" style="color: #333;">ci_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">call_arity</span> <span class="p">})</span></span>
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1421
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<pre style="margin: 0;">-<span id="LC1421" 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;">call_arity</span> <span class="o" style="font-weight: 600;"><=</span> <span class="n" style="color: #333;">fn_arity</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>
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<pre style="margin: 0;">-<span id="LC1423" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialising Calls]</span></span>
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1424
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<pre style="margin: 0;">-<span id="LC1424" 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;">rhs_env2</span><span class="p">,</span> <span class="n" style="color: #333;">unused_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_args</span><span class="p">,</span> <span class="n" style="color: #333;">unspec_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">dx_binds</span><span class="p">,</span> <span class="n" style="color: #333;">spec_args</span><span class="p">)</span></span>
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1425
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<pre style="margin: 0;">-<span id="LC1425" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">rhs_bndrs</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">dropWhileEndLE</span> <span class="n" style="color: #333;">isUnspecArg</span> <span class="n" style="color: #333;">call_args</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;">let</span> <span class="n" style="color: #333;">rhs_body'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkLams</span> <span class="n" style="color: #333;">unused_bndrs</span> <span class="n" style="color: #333;">rhs_body</span></span>
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1261
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<pre style="margin: 0;">+<span id="LC1261" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_call</span> <span class="n" style="color: #333;">spec_acc</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">rules_acc</span><span class="p">,</span> <span class="n" style="color: #333;">pairs_acc</span><span class="p">,</span> <span class="n" style="color: #333;">uds_acc</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CI</span> <span class="p">{</span> <span class="n" style="color: #333;">ci_key</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">call_args</span> <span class="p">})</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1262" 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">
1262
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<pre style="margin: 0;">+<span id="LC1262" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialising Calls]</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1263" 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">
1263
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<pre style="margin: 0;">+<span id="LC1263" 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;">useful</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_env2</span><span class="p">,</span> <span class="n" style="color: #333;">leftover_bndrs</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1264" 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">
1264
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<pre style="margin: 0;">+<span id="LC1264" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">rule_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_lhs_args</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1265" 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">
1265
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<pre style="margin: 0;">+<span id="LC1265" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">spec_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">dx_binds</span><span class="p">,</span> <span class="n" style="color: #333;">spec_args</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">rhs_bndrs</span> <span class="n" style="color: #333;">call_args</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1266" 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">
1266
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<pre style="margin: 0;">+<span id="LC1266" class="line" lang="haskell"></span>
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1427
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<td class="diff-line-num new_line" data-linenumber="1267" 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">
1267
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<pre style="margin: 0;"> <span id="LC1267" 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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<td class="diff-line-num old old_line" data-linenumber="1428" 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">
1428
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<td class="diff-line-num new_line old" data-linenumber="1268" 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="LC1428" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">already_covered</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">rules_acc</span> <span class="n" style="color: #333;">rule_args</span></span>
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<td class="diff-line-num new old_line" data-linenumber="1429" 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="1268" 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">
1268
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<pre style="margin: 0;">+<span id="LC1268" 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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<td class="diff-line-num new new_line" data-linenumber="1269" 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">
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;">already_covered</span> <span class="n" style="color: #333;">dflags</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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1429
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1270
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<pre style="margin: 0;"> <span id="LC1270" 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 old_line" data-linenumber="1430" 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">
1430
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<td class="diff-line-num new_line" data-linenumber="1271" 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">
1271
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<pre style="margin: 0;"> <span id="LC1271" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "spec_call" (vcat [ ppr _call_info, ppr fn, ppr rhs_dict_ids</span></span>
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<td class="diff-line-num old_line" data-linenumber="1431" 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">
1431
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<td class="diff-line-num new_line" data-linenumber="1272" 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">
1272
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<pre style="margin: 0;"> <span id="LC1272" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- , text "rhs_env2" <+> ppr (se_subst rhs_env2)</span></span>
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1432
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<td class="diff-line-num new_line" data-linenumber="1273" 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">
1273
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<pre style="margin: 0;"> <span id="LC1273" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- , ppr dx_binds ]) $</span></span>
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1433
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<td class="diff-line-num new_line old" data-linenumber="1274" 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="LC1433" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span></span>
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1434
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<td class="diff-line-num new_line old" data-linenumber="1274" 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="LC1434" class="line" lang="haskell"> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- Figure out the type of the specialised function</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1435" 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">
1435
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<pre style="margin: 0;">-<span id="LC1435" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">body</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkLams</span> <span class="n" style="color: #333;">unspec_bndrs</span> <span class="n" style="color: #333;">rhs_body'</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1436" 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">
1436
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<pre style="margin: 0;">-<span id="LC1436" class="line" lang="haskell"> <span class="n" style="color: #333;">body_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span> <span class="n" style="color: #333;">rhs_env2</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">exprType</span> <span class="n" style="color: #333;">body</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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<td class="diff-line-num new_line old" data-linenumber="1274" 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="LC1437" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">lam_extra_args</span><span class="p">,</span> <span class="n" style="color: #333;">app_args</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialisations Must Be Lifted]</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1438" 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">
1438
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<td class="diff-line-num new_line old" data-linenumber="1274" 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="LC1438" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isUnliftedType</span> <span class="n" style="color: #333;">body_ty</span> <span class="c1" style="color: #998; font-style: italic;">-- C.f. GHC.Core.Op.WorkWrap.Lib.mkWorkerArgs</span></span>
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<td class="diff-line-num old old_line" data-linenumber="1439" 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">
1439
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<pre style="margin: 0;">-<span id="LC1439" 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;">isJoinId</span> <span class="n" style="color: #333;">fn</span><span class="p">)</span></span>
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1440
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<pre style="margin: 0;">-<span id="LC1440" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">([</span><span class="n" style="color: #333;">voidArgId</span><span class="p">],</span> <span class="n" style="color: #333;">voidPrimId</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">unspec_bndrs</span><span class="p">)</span></span>
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1441
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<pre style="margin: 0;">-<span id="LC1441" 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="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">unspec_bndrs</span><span class="p">)</span></span>
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1442
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<pre style="margin: 0;">-<span id="LC1442" class="line" lang="haskell"> <span class="n" style="color: #333;">join_arity_change</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">app_args</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">rule_args</span></span>
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1274
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<pre style="margin: 0;">+<span id="LC1274" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- Run the specialiser on the specialised RHS</span></span>
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1275
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<pre style="margin: 0;">+<span id="LC1275" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The "1" suffix is before we maybe add the void arg</span></span>
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1276
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<pre style="margin: 0;">+<span id="LC1276" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">spec_rhs1</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_uds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specLam</span> <span class="n" style="color: #333;">rhs_env2</span> <span class="p">(</span><span class="n" style="color: #333;">spec_bndrs</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">leftover_bndrs</span><span class="p">)</span> <span class="n" style="color: #333;">rhs_body</span></span>
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1277
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<pre style="margin: 0;">+<span id="LC1277" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">spec_fn_ty1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprType</span> <span class="n" style="color: #333;">spec_rhs1</span></span>
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1278
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<pre style="margin: 0;">+<span id="LC1278" class="line" lang="haskell"></span>
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1279
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<pre style="margin: 0;">+<span id="LC1279" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Maybe add a void arg to the specialised function,</span></span>
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1280
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<pre style="margin: 0;">+<span id="LC1280" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- to avoid unlifted bindings</span></span>
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1281
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<pre style="margin: 0;">+<span id="LC1281" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialisations Must Be Lifted]</span></span>
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1282
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<pre style="margin: 0;">+<span id="LC1282" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- C.f. GHC.Core.Op.WorkWrap.Lib.mkWorkerArgs</span></span>
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1283
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<pre style="margin: 0;">+<span id="LC1283" class="line" lang="haskell"> <span class="n" style="color: #333;">add_void_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isUnliftedType</span> <span class="n" style="color: #333;">spec_fn_ty1</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;">isJoinId</span> <span class="n" style="color: #333;">fn</span><span class="p">)</span></span>
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1284
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<pre style="margin: 0;">+<span id="LC1284" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">spec_rhs</span><span class="p">,</span> <span class="n" style="color: #333;">spec_fn_ty</span><span class="p">,</span> <span class="n" style="color: #333;">rule_rhs_args</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="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">add_void_arg</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;">voidArgId</span> <span class="n" style="color: #333;">spec_rhs1</span></span>
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1286
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<pre style="margin: 0;">+<span id="LC1286" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkVisFunTy</span> <span class="n" style="color: #333;">voidPrimTy</span> <span class="n" style="color: #333;">spec_fn_ty1</span></span>
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1287
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<pre style="margin: 0;">+<span id="LC1287" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">voidPrimId</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">spec_bndrs</span><span class="p">)</span></span>
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1288
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<pre style="margin: 0;">+<span id="LC1288" 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;">spec_rhs1</span><span class="p">,</span> <span class="n" style="color: #333;">spec_fn_ty1</span><span class="p">,</span> <span class="n" style="color: #333;">spec_bndrs</span><span class="p">)</span></span>
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1289
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<pre style="margin: 0;">+<span id="LC1289" class="line" lang="haskell"></span>
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1290
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<pre style="margin: 0;">+<span id="LC1290" class="line" lang="haskell"> <span class="n" style="color: #333;">arity_decr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">count</span> <span class="n" style="color: #333;">isValArg</span> <span class="n" style="color: #333;">rule_lhs_args</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">count</span> <span class="n" style="color: #333;">isId</span> <span class="n" style="color: #333;">rule_rhs_args</span></span>
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1291
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<pre style="margin: 0;">+<span id="LC1291" class="line" lang="haskell"> <span class="n" style="color: #333;">join_arity_decr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">rule_lhs_args</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">rule_rhs_args</span></span>
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1443
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1292
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<pre style="margin: 0;"> <span id="LC1292" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_join_arity</span> <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;">orig_join_arity</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">isJoinId_maybe</span> <span class="n" style="color: #333;">fn</span></span>
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1444
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<pre style="margin: 0;">-<span id="LC1444" 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;">orig_join_arity</span> <span class="o" style="font-weight: 600;"><span class="idiff left">+</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">join_arity_change</span></span><span class="p">)</span></span>
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1293
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<pre style="margin: 0;">+<span id="LC1293" 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;">orig_join_arity</span> <span class="o" style="font-weight: 600;"><span class="idiff left">-</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">join_arity_decr</span></span><span class="p">)</span></span>
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1445
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1294
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<pre style="margin: 0;"> <span id="LC1294" 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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1446
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1295
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<pre style="margin: 0;"> <span id="LC1295" 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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1447
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1296
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<pre style="margin: 0;"> <span id="LC1296" class="line" lang="haskell"></span>
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1448
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<pre style="margin: 0;">-<span id="LC1448" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">spec_rhs</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_uds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specExpr</span> <span class="n" style="color: #333;">rhs_env2</span> <span class="p">(</span><span class="n" style="color: #333;">mkLams</span> <span class="n" style="color: #333;">lam_extra_args</span> <span class="n" style="color: #333;">body</span><span class="p">)</span></span>
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1449
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<pre style="margin: 0;">-<span id="LC1449" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">spec_id_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprType</span> <span class="n" style="color: #333;">spec_rhs</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="n" style="color: #333;">spec_f</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_id_ty</span> <span class="n" style="color: #333;">spec_join_arity</span></span>
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1297
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<pre style="margin: 0;">+<span id="LC1297" 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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1451
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1298
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<pre style="margin: 0;"> <span id="LC1298" 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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1452
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1299
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<pre style="margin: 0;"> <span id="LC1299" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span></span>
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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;">-- The rule to put in the function's specialisation is:</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1475" 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">@@ -1475,13 +1322,12 @@ specCalls mb_mod env existing_rules calls_for_me fn rhs</td>
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1322
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<pre style="margin: 0;"> <span id="LC1322" class="line" lang="haskell"> <span class="n" style="color: #333;">inl_act</span> <span class="c1" style="color: #998; font-style: italic;">-- Note [Auto-specialisation and RULES]</span></span>
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1476
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1323
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<pre style="margin: 0;"> <span id="LC1323" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">fn</span><span class="p">)</span></span>
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1477
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1324
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<pre style="margin: 0;"> <span id="LC1324" class="line" lang="haskell"> <span class="n" style="color: #333;">rule_bndrs</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;">rule_args</span></span>
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1479
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<pre style="margin: 0;">-<span id="LC1479" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">mkVarApps</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">spec_f</span><span class="p"><span class="idiff left">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">app</span>_args</span><span class="p">)</span></span>
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1325
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<pre style="margin: 0;">+<span id="LC1325" class="line" lang="haskell"> <span class="n" style="color: #333;">rule_<span class="idiff left right">lhs_</span>args</span></span>
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<pre style="margin: 0;">+<span id="LC1326" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">mkVarApps</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">spec_f<span class="idiff left">n</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">rule_rhs</span>_args</span><span class="p">)</span></span>
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1327
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<pre style="margin: 0;"> <span id="LC1327" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1328" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_rule</span></span>
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1482
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1329
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<pre style="margin: 0;"> <span id="LC1329" 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;">isJoinId_maybe</span> <span class="n" style="color: #333;">fn</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1483
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<pre style="margin: 0;">-<span id="LC1483" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">join_arity</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">etaExpandToJoinPointRule</span> <span class="n" style="color: #333;">join_arity</span></span>
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1484
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<pre style="margin: 0;">-<span id="LC1484" class="line" lang="haskell"> <span class="n" style="color: #333;">rule_wout_eta</span></span>
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1330
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<pre style="margin: 0;">+<span id="LC1330" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">join_arity</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">etaExpandToJoinPointRule</span> <span class="n" style="color: #333;">join_arity</span> <span class="n" style="color: #333;">rule_wout_eta</span></span>
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1485
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1331
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<pre style="margin: 0;"> <span id="LC1331" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">rule_wout_eta</span></span>
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1486
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1332
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<pre style="margin: 0;"> <span id="LC1332" class="line" lang="haskell"></span>
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1487
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1333
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<pre style="margin: 0;"> <span id="LC1333" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Add the { d1' = dx1; d2' = dx2 } usage stuff</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">@@ -1500,7 +1346,7 @@ specCalls mb_mod env existing_rules calls_for_me fn rhs</td>
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1346
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<pre style="margin: 0;"> <span id="LC1346" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">inl_prag</span> <span class="p">{</span> <span class="n" style="color: #333;">inl_inline</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoUserInline</span> <span class="p">},</span> <span class="n" style="color: #333;">noUnfolding</span><span class="p">)</span></span>
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1347
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<pre style="margin: 0;"> <span id="LC1347" class="line" lang="haskell"></span>
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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="n" style="color: #333;">otherwise</span></span>
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1503
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<pre style="margin: 0;">-<span id="LC1503" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">inl_prag</span><span class="p">,</span> <span class="n" style="color: #333;">specUnfolding</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;"><span class="idiff left">unspec_bndrs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">spec_app</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">n_dicts</span></span> <span class="n" style="color: #333;">fn_unf</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1349" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">inl_prag</span><span class="p">,</span> <span class="n" style="color: #333;">specUnfolding</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;"><span class="idiff left">fn</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">spec_bndrs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">spec_app</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">arity_decr</span></span> <span class="n" style="color: #333;">fn_unf</span><span class="p">)</span></span>
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1350
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<pre style="margin: 0;"> <span id="LC1350" class="line" lang="haskell"></span>
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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;">spec_app</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">e</span> <span class="p">`</span><span class="n" style="color: #333;">mkApps</span><span class="p">`</span> <span class="n" style="color: #333;">spec_args</span></span>
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1506
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1352
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<pre style="margin: 0;"> <span id="LC1352" 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">@@ -1508,13 +1354,14 @@ specCalls mb_mod env existing_rules calls_for_me fn rhs</td>
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1508
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1354
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<pre style="margin: 0;"> <span id="LC1354" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Adding arity information just propagates it a bit faster</span></span>
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<pre style="margin: 0;"> <span id="LC1355" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Arity decrease] in GHC.Core.Op.Simplify</span></span>
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<pre style="margin: 0;"> <span id="LC1356" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Copy InlinePragma information from the parent Id.</span></span>
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<pre style="margin: 0;">-<span id="LC1511" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- So if f has INLINE[1] so does spec_f</span></span>
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<pre style="margin: 0;">-<span id="LC1512" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_f_w_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">spec_f</span> <span class="p">`</span><span class="n" style="color: #333;">setIdArity</span><span class="p">`</span> <span class="n" style="color: #333;">max</span> <span class="mi" style="color: #099;">0</span> <span class="p">(</span><span class="n" style="color: #333;">fn_arity</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">n_dicts</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC1513" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">setInlinePragma</span><span class="p">`</span> <span class="n" style="color: #333;">spec_inl_prag</span></span>
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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;">setIdUnfolding</span><span class="p">`</span> <span class="n" style="color: #333;">spec_unf</span></span>
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<pre style="margin: 0;">-<span id="LC1515" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">asJoinId_maybe</span><span class="p">`</span> <span class="n" style="color: #333;">spec_join_arity</span></span>
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<pre style="margin: 0;">-<span id="LC1516" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1517" class="line" lang="haskell"> <span class="n" style="color: #333;">_rule_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;">spec_f</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fn_type</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">spec_id_ty</span></span>
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<pre style="margin: 0;">+<span id="LC1357" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- So if f has INLINE[1] so does spec_fn</span></span>
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<pre style="margin: 0;">+<span id="LC1358" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_f_w_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">spec_fn</span> <span class="p">`</span><span class="n" style="color: #333;">setIdArity</span><span class="p">`</span> <span class="n" style="color: #333;">max</span> <span class="mi" style="color: #099;">0</span> <span class="p">(</span><span class="n" style="color: #333;">fn_arity</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">arity_decr</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1359" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">setInlinePragma</span><span class="p">`</span> <span class="n" style="color: #333;">spec_inl_prag</span></span>
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<pre style="margin: 0;">+<span id="LC1360" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">setIdUnfolding</span><span class="p">`</span> <span class="n" style="color: #333;">spec_unf</span></span>
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<pre style="margin: 0;">+<span id="LC1361" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">asJoinId_maybe</span><span class="p">`</span> <span class="n" style="color: #333;">spec_join_arity</span></span>
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<pre style="margin: 0;">+<span id="LC1362" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1363" class="line" lang="haskell"> <span class="n" style="color: #333;">_rule_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;">fn</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="n" style="color: #333;">fn_type</span></span>
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1364
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<pre style="margin: 0;">+<span id="LC1364" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">spec_fn</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="n" style="color: #333;">spec_fn_ty</span></span>
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1518
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1365
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<pre style="margin: 0;"> <span id="LC1365" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rhs_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">call_args</span></span>
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1366
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<pre style="margin: 0;"> <span id="LC1366" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">spec_rule</span></span>
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1367
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<pre style="margin: 0;"> <span id="LC1367" class="line" lang="haskell"> <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">@@ -1573,33 +1420,44 @@ preserve laziness.</td>
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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="cm" style="color: #998; font-style: italic;">Note [Specialising Calls]</span></span>
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1575
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1422
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<pre style="margin: 0;"> <span id="LC1422" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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1576
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<pre style="margin: 0;">-<span id="LC1576" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Suppose we have a function:</span></span>
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1423
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<pre style="margin: 0;">+<span id="LC1423" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Suppose we have a function<span class="idiff left right"> with a complicated type</span>:</span></span>
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1577
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1424
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<pre style="margin: 0;"> <span id="LC1424" 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="cm" style="color: #998; font-style: italic;"> f :: <span class="idiff left right">Int -> forall a b c. (Foo a, Foo c) => Bar -> Qux</span></span></span>
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1579
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<pre style="margin: 0;">-<span id="LC1579" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f <span class="idiff left right">= \x -> /\ a b c -> \d1 d2 bar -> rhs</span></span></span>
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1425
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<pre style="margin: 0;">+<span id="LC1425" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f :: <span class="idiff left right">forall a b c. Int -> Eq a => Show b => c -> Blah</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="cm" style="color: #998; font-style: italic;"> f <span class="idiff left right">@a @b @c i dEqA dShowA x = blah</span></span></span>
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1580
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1427
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<pre style="margin: 0;"> <span id="LC1427" class="line" lang="haskell"></span>
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1581
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1428
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<pre style="margin: 0;"> <span id="LC1428" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and suppose it is called at:</span></span>
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1582
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1429
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<pre style="margin: 0;"> <span id="LC1429" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1583" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f 7 @T1 @T2 @T3 d<span class="idiff left right">FooT1 dFooT3 bar</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="cm" style="color: #998; font-style: italic;"> f 7 @T1 @T2 @T3 d<span class="idiff left right">EqT1 ($dfShow dShowT2) t3</span></span></span>
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1584
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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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1585
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<pre style="margin: 0;">-<span id="LC1585" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This call is described as a 'CallInfo' whose 'ci_key' is</span></span>
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1432
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<pre style="margin: 0;">+<span id="LC1432" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This call is described as a 'CallInfo' whose 'ci_key' is<span class="idiff left right">:</span></span></span>
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1586
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1433
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<pre style="margin: 0;"> <span id="LC1433" 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="cm" style="color: #998; font-style: italic;"> [ <span class="idiff left right">UnspecArg, SpecType T1, UnspecType, SpecType T3, SpecDict dFoo</span>T1</span></span>
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1588
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<pre style="margin: 0;">-<span id="LC1588" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , SpecDict <span class="idiff left right">dFooT3</span>, UnspecArg ]</span></span>
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1434
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<pre style="margin: 0;">+<span id="LC1434" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> [ <span class="idiff left right">SpecType T1, SpecType T2, UnspecType, UnspecArg, SpecDict dEq</span>T1</span></span>
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1435
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<pre style="margin: 0;">+<span id="LC1435" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , SpecDict <span class="idiff left right">($dfShow dShowT2)</span>, UnspecArg ]</span></span>
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1589
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1436
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<pre style="margin: 0;"> <span id="LC1436" class="line" lang="haskell"></span>
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1590
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<pre style="margin: 0;">-<span id="LC1590" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Why are 'a' and '<span class="idiff left right">c' identified as 'SpecType', while 'b</span>' is 'UnspecType'?</span></span>
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1437
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<pre style="margin: 0;">+<span id="LC1437" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Why are 'a' and '<span class="idiff left right">b' identified as 'SpecType', while 'c</span>' is 'UnspecType'?</span></span>
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1591
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1438
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<pre style="margin: 0;"> <span id="LC1438" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Because we must specialise the function on type variables that appear</span></span>
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1592
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1439
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<pre style="margin: 0;"> <span id="LC1439" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">free in its *dictionary* arguments; but not on type variables that do not</span></span>
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1593
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1440
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<pre style="margin: 0;"> <span id="LC1440" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">appear in any dictionaries, i.e. are fully polymorphic.</span></span>
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1594
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1441
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<pre style="margin: 0;"> <span id="LC1441" class="line" lang="haskell"></span>
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1595
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1442
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<pre style="margin: 0;"> <span id="LC1442" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Because this call has dictionaries applied, we'd like to specialise</span></span>
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1596
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1443
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<pre style="margin: 0;"> <span id="LC1443" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the call on any type argument that appears free in those dictionaries.</span></span>
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1597
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<pre style="margin: 0;">-<span id="LC1597" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In this case, those are (a ~ T1, c ~ T3).</span></span>
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1444
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<pre style="margin: 0;">+<span id="LC1444" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In this case, those are [a :-> T1, b :-> T2].</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="cm" style="color: #998; font-style: italic;">We also need to substitute the dictionary binders with their</span></span>
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1447
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<pre style="margin: 0;">+<span id="LC1447" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">specialised dictionaries. The simplest substitution would be</span></span>
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1448
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<pre style="margin: 0;">+<span id="LC1448" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">[dEqA :-> dEqT1, dShowA :-> $dfShow dShowT2], but this duplicates</span></span>
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1449
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<pre style="margin: 0;">+<span id="LC1449" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">work, since `$dfShow dShowT2` is a function application. Therefore, we</span></span>
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1450
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<pre style="margin: 0;">+<span id="LC1450" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">also want to *float the dictionary out* (via bindAuxiliaryDict),</span></span>
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1451
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<pre style="margin: 0;">+<span id="LC1451" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">creating a new dict binding</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="cm" style="color: #998; font-style: italic;"> dShow1 = $dfShow dShowT2</span></span>
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1598
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1454
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<pre style="margin: 0;"> <span id="LC1454" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1599" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">As a result, we'd like to generate a function:</span></span></span>
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<pre style="margin: 0;">+<span id="LC1455" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">and the substitution [dEqA :-> dEqT1, dShowA :-> dShow1].</span></span></span>
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1600
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1456
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<pre style="margin: 0;"> <span id="LC1456" class="line" lang="haskell"></span>
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1601
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<pre style="margin: 0;">-<span id="LC1601" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> $sf :: Int -> forall b. Bar -> Qux</span></span>
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1602
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<pre style="margin: 0;">-<span id="LC1602" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> $sf = SUBST[a->T1, c->T3, d1->d1', d2->d2'] (\x -> /\ b -> \bar -> rhs)</span></span>
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<pre style="margin: 0;">+<span id="LC1457" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">With the substitutions in hand, we can generate a specialised function:</span></span>
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1458
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<pre style="margin: 0;">+<span id="LC1458" class="line" lang="haskell"></span>
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1459
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<pre style="margin: 0;">+<span id="LC1459" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> $sf :: forall c. Int -> c -> Blah</span></span>
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1460
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<pre style="margin: 0;">+<span id="LC1460" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> $sf = SUBST[a :-> T1, b :-> T2, dEqA :-> dEqT1, dShowA :-> dShow1] (\@c i x -> blah)</span></span>
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1603
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1461
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<pre style="margin: 0;"> <span id="LC1461" class="line" lang="haskell"></span>
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1604
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1462
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<pre style="margin: 0;"> <span id="LC1462" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that the substitution is applied to the whole thing. This is</span></span>
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1605
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1463
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<pre style="margin: 0;"> <span id="LC1463" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">convenient, but just slightly fragile. Notably:</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">@@ -1607,20 +1465,71 @@ convenient, but just slightly fragile. Notably:</td>
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1607
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1465
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<pre style="margin: 0;"> <span id="LC1465" class="line" lang="haskell"></span>
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1608
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1466
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<pre style="margin: 0;"> <span id="LC1466" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We must construct a rewrite rule:</span></span>
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1609
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1467
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<pre style="margin: 0;"> <span id="LC1467" class="line" lang="haskell"></span>
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1610
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<pre style="margin: 0;">-<span id="LC1610" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> RULE "SPEC f @T1 <span class="idiff left right">_ @T3</span>"</span></span>
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1611
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<pre style="margin: 0;">-<span id="LC1611" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> forall (<span class="idiff left right">x :: Int) (@b :: Type) (d1' :: Foo T1) (d2' :: Foo T3</span>).</span></span>
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1612
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<pre style="margin: 0;">-<span id="LC1612" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f <span class="idiff left right">x @T1 @b @T3 d1' d2' = $sf x @b</span></span></span>
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<pre style="margin: 0;">+<span id="LC1468" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> RULE "SPEC f @T1 <span class="idiff left right">@T2 _</span>"</span></span>
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<pre style="margin: 0;">+<span id="LC1469" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> forall (<span class="idiff left right">@c :: Type) (i :: Int) (d1 :: Eq T1) (d2 :: Show T2</span>).</span></span>
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<pre style="margin: 0;">+<span id="LC1470" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f <span class="idiff left right">@T1 @T2 @c i d1 d2 = $sf @c i</span></span></span>
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1613
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1471
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<pre style="margin: 0;"> <span id="LC1471" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1614" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In the rule, d1<span class="idiff left right">' and d2'</span> are just wildcards, not used in the RHS. Note</span></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;">additionally that '<span class="idiff left right">bar</span>' isn't captured by this rule --- we bind only</span></span>
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1472
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<pre style="margin: 0;">+<span id="LC1472" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In the rule, d1<span class="idiff left right"> and d2</span> are just wildcards, not used in the RHS. Note</span></span>
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1473
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<pre style="margin: 0;">+<span id="LC1473" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">additionally that '<span class="idiff left right">x</span>' isn't captured by this rule --- we bind only</span></span>
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1616
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1474
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<pre style="margin: 0;"> <span id="LC1474" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">enough etas in order to capture all of the *specialised* arguments.</span></span>
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1617
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1475
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<pre style="margin: 0;"> <span id="LC1475" class="line" lang="haskell"></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;">Finally, we must also construct the usage-details</span></span>
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1476
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<pre style="margin: 0;">+<span id="LC1476" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Drop dead args from specialisations]</span></span>
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1477
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<pre style="margin: 0;">+<span id="LC1477" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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1478
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<pre style="margin: 0;">+<span id="LC1478" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When specialising a function, it’s possible some of the arguments may</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1479" 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">
1479
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<pre style="margin: 0;">+<span id="LC1479" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">actually be dead. For example, consider:</span></span>
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1480
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<pre style="margin: 0;">+<span id="LC1480" class="line" lang="haskell"></span>
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1481
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<pre style="margin: 0;">+<span id="LC1481" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f :: forall a. () -> Show a => a -> String</span></span>
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1482
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<pre style="margin: 0;">+<span id="LC1482" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f x y = show y ++ "!"</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="cm" style="color: #998; font-style: italic;">We might generate the following CallInfo for `f @Int`:</span></span>
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1485
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<pre style="margin: 0;">+<span id="LC1485" class="line" lang="haskell"></span>
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1486
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<pre style="margin: 0;">+<span id="LC1486" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> [SpecType Int, UnspecArg, SpecDict $dShowInt, UnspecArg]</span></span>
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1487
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<pre style="margin: 0;">+<span id="LC1487" class="line" lang="haskell"></span>
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1488
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<pre style="margin: 0;">+<span id="LC1488" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Normally we’d include both the x and y arguments in the</span></span>
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1489
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<pre style="margin: 0;">+<span id="LC1489" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">specialisation, since we’re not specialising on either of them. But</span></span>
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1490
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<pre style="margin: 0;">+<span id="LC1490" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">that’s silly, since x is actually unused! So we might as well drop it</span></span>
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1491
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<pre style="margin: 0;">+<span id="LC1491" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in the specialisation:</span></span>
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1492
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<pre style="margin: 0;">+<span id="LC1492" class="line" lang="haskell"></span>
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1493
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<pre style="margin: 0;">+<span id="LC1493" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> $sf :: Int -> String</span></span>
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1494
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<pre style="margin: 0;">+<span id="LC1494" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> $sf y = show y ++ "!"</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="cm" style="color: #998; font-style: italic;"> {-# RULE "SPEC f @Int" forall x. f @Int x $dShow = $sf #-}</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="cm" style="color: #998; font-style: italic;">This doesn’t save us much, since the arg would be removed later by</span></span>
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1499
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<pre style="margin: 0;">+<span id="LC1499" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">worker/wrapper, anyway, but it’s easy to do. Note, however, that we</span></span>
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1500
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<pre style="margin: 0;">+<span id="LC1500" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">only drop dead arguments if:</span></span>
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1501
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<pre style="margin: 0;">+<span id="LC1501" class="line" lang="haskell"></span>
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1502
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<pre style="margin: 0;">+<span id="LC1502" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> 1. We don’t specialise on them.</span></span>
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1503
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<pre style="margin: 0;">+<span id="LC1503" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> 2. They come before an argument we do specialise on.</span></span>
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1504
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<pre style="margin: 0;">+<span id="LC1504" class="line" lang="haskell"></span>
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1505
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<pre style="margin: 0;">+<span id="LC1505" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Doing the latter would require eta-expanding the RULE, which could</span></span>
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1506
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<pre style="margin: 0;">+<span id="LC1506" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">make it match less often, so it’s not worth it. Doing the former could</span></span>
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1507
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<pre style="margin: 0;">+<span id="LC1507" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">be more useful --- it would stop us from generating pointless</span></span>
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<pre style="margin: 0;">+<span id="LC1508" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">specialisations --- but it’s more involved to implement and unclear if</span></span>
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1509
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<pre style="margin: 0;">+<span id="LC1509" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">it actually provides much benefit in practice.</span></span>
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1619
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1510
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<pre style="margin: 0;"> <span id="LC1510" 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="cm" style="color: #998; font-style: italic;"> { d1' = dx1; d2' = dx2 }</span></span>
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1511
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<pre style="margin: 0;">+<span id="LC1511" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Zap occ info in rule binders]</span></span>
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<pre style="margin: 0;">+<span id="LC1512" 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="LC1513" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When we generate a specialisation RULE, we need to drop occurrence</span></span>
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<pre style="margin: 0;">+<span id="LC1514" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">info on the binders. If we don’t, things go wrong when we specialise a</span></span>
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1515
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<pre style="margin: 0;">+<span id="LC1515" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">function like</span></span>
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1516
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<pre style="margin: 0;">+<span id="LC1516" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1517" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f :: forall a. () -> Show a => a -> String</span></span>
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1518
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<pre style="margin: 0;">+<span id="LC1518" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f x y = show y ++ "!"</span></span>
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1519
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<pre style="margin: 0;">+<span id="LC1519" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1520" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">since we’ll generate a RULE like</span></span>
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1521
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<pre style="margin: 0;">+<span id="LC1521" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1522" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> RULE "SPEC f @Int" forall x [Occ=Dead].</span></span>
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<pre style="margin: 0;">+<span id="LC1523" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f @Int x $dShow = $sf</span></span>
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1524
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<pre style="margin: 0;">+<span id="LC1524" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1525" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and Core Lint complains, even though x only appears on the LHS (due to</span></span>
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1526
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<pre style="margin: 0;">+<span id="LC1526" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Drop dead args from specialisations]).</span></span>
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1621
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1527
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<pre style="margin: 0;"> <span id="LC1527" class="line" lang="haskell"></span>
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1622
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<pre style="margin: 0;">-<span id="LC1622" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">where d1', d2' are cloned versions of d1,d2, with the type substitution</span></span>
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1623
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<pre style="margin: 0;">-<span id="LC1623" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">applied. These auxiliary bindings just avoid duplication of dx1, dx2.</span></span>
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<pre style="margin: 0;">+<span id="LC1528" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Why is that a Lint error? Because the arguments on the LHS of a rule</span></span>
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1529
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<pre style="margin: 0;">+<span id="LC1529" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">are syntactically expressions, not patterns, so Lint treats the</span></span>
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1530
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<pre style="margin: 0;">+<span id="LC1530" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">appearance of x as a use rather than a binding. Fortunately, the</span></span>
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1531
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<pre style="margin: 0;">+<span id="LC1531" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">solution is simple: we just make sure to zap the occ info before</span></span>
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<pre style="margin: 0;">+<span id="LC1532" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">using ids as wildcard binders in a rule.</span></span>
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1624
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1533
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<pre style="margin: 0;"> <span id="LC1533" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1534" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Account for casts in binding]</span></span>
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1626
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<pre style="margin: 0;"> <span id="LC1535" 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">@@ -1675,56 +1584,6 @@ type correctness issue.) But specialisation rules are strictly for</td>
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1584
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<pre style="margin: 0;"> <span id="LC1584" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">What this means is that a SPEC rules from auto-specialisation in</span></span>
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1676
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<pre style="margin: 0;"> <span id="LC1585" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">module M will be used in other modules only if M.hi has been read for</span></span>
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<pre style="margin: 0;"> <span id="LC1586" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">some other reason, which is actually pretty likely.</span></span>
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<pre style="margin: 0;">-<span id="LC1678" 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="LC1679" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1680" class="line" lang="haskell"><span class="n" style="color: #333;">bindAuxiliaryDicts</span></span>
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<pre style="margin: 0;">-<span id="LC1681" 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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<pre style="margin: 0;">-<span id="LC1682" 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;">DictId</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="c1" style="color: #998; font-style: italic;">-- Original dict bndrs, and the witnessing expressions</span></span>
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1683
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<pre style="margin: 0;">-<span id="LC1683" 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;">DictId</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- A cloned dict-id for each dict arg</span></span>
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<pre style="margin: 0;">-<span id="LC1684" 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;">SpecEnv</span><span class="p">,</span> <span class="c1" style="color: #998; font-style: italic;">-- Substitute for all orig_dicts</span></span>
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<pre style="margin: 0;">-<span id="LC1685" class="line" lang="haskell"> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">DictBind</span><span class="p">],</span> <span class="c1" style="color: #998; font-style: italic;">-- Auxiliary dict bindings</span></span>
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<pre style="margin: 0;">-<span id="LC1686" class="line" lang="haskell"> <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;">-- Witnessing expressions (all trivial)</span></span>
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<pre style="margin: 0;">-<span id="LC1687" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Bind any dictionary arguments to fresh names, to preserve sharing</span></span>
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<pre style="margin: 0;">-<span id="LC1688" class="line" lang="haskell"><span class="n" style="color: #333;">bindAuxiliaryDicts</span> <span class="n" style="color: #333;">env</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</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="n" style="color: #333;">subst</span><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;">interesting</span> <span class="p">})</span></span>
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1689
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<pre style="margin: 0;">-<span id="LC1689" class="line" lang="haskell"> <span class="n" style="color: #333;">orig_dict_ids</span> <span class="n" style="color: #333;">call_ds</span> <span class="n" style="color: #333;">inst_dict_ids</span></span>
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1690
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<pre style="margin: 0;">-<span id="LC1690" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">dx_binds</span><span class="p">,</span> <span class="n" style="color: #333;">spec_dict_args</span><span class="p">)</span></span>
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1691
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<pre style="margin: 0;">-<span id="LC1691" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1692
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<pre style="margin: 0;">-<span id="LC1692" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">dx_binds</span><span class="p">,</span> <span class="n" style="color: #333;">spec_dict_args</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;">call_ds</span> <span class="n" style="color: #333;">inst_dict_ids</span></span>
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1693
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<pre style="margin: 0;">-<span id="LC1693" class="line" lang="haskell"> <span class="n" style="color: #333;">env'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</span> <span class="p">{</span> <span class="n" style="color: #333;">se_subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">subst</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;">extendSubstList</span><span class="p">`</span></span>
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1694
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<pre style="margin: 0;">-<span id="LC1694" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">orig_dict_ids</span> <span class="p">`</span><span class="n" style="color: #333;">zip</span><span class="p">`</span> <span class="n" style="color: #333;">spec_dict_args</span><span class="p">)</span></span>
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1695
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<pre style="margin: 0;">-<span id="LC1695" class="line" lang="haskell"> <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;">extendInScopeList</span><span class="p">`</span> <span class="n" style="color: #333;">dx_ids</span></span>
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1696
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<pre style="margin: 0;">-<span id="LC1696" 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;">interesting</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">interesting_dicts</span> <span class="p">}</span></span>
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1697
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<pre style="margin: 0;">-<span id="LC1697" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1698" class="line" lang="haskell"> <span class="n" style="color: #333;">dx_ids</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="n" style="color: #333;">dx_id</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;">dx_id</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="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">dx_binds</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC1699" class="line" lang="haskell"> <span class="n" style="color: #333;">interesting_dicts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVarSet</span> <span class="p">[</span> <span class="n" style="color: #333;">dx_id</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;">dx_id</span> <span class="n" style="color: #333;">dx</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;">dx_binds</span></span>
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<pre style="margin: 0;">-<span id="LC1700" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">interestingDict</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dx</span> <span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC1701" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Make the new dictionaries interesting]</span></span>
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<pre style="margin: 0;">-<span id="LC1702" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1703" 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;">CoreExpr</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;">CoreBndr</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;">DictBind</span><span class="p">],</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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1704
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<pre style="margin: 0;">-<span id="LC1704" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</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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1705
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<pre style="margin: 0;">-<span id="LC1705" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">dx</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">dxs</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">dx_id</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">dx_ids</span><span class="p">)</span></span>
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1706
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<pre style="margin: 0;">-<span id="LC1706" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">exprIsTrivial</span> <span class="n" style="color: #333;">dx</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">dx_binds</span><span class="p">,</span> <span class="n" style="color: #333;">dx</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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1707
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<pre style="margin: 0;">-<span id="LC1707" 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;">mkDB</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">dx_id</span> <span class="n" style="color: #333;">dx</span><span class="p">)</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">dx_binds</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">dx_id</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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1708
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<pre style="margin: 0;">-<span id="LC1708" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1709
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<pre style="margin: 0;">-<span id="LC1709" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">dx_binds</span><span class="p">,</span> <span class="n" style="color: #333;">args</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;">dxs</span> <span class="n" style="color: #333;">dx_ids</span></span>
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1710
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<pre style="margin: 0;">-<span id="LC1710" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- In the first case extend the substitution but not bindings;</span></span>
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1711
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<pre style="margin: 0;">-<span id="LC1711" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in the latter extend the bindings but not the substitution.</span></span>
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1712
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<pre style="margin: 0;">-<span id="LC1712" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- For the former, note that we bind the *original* dict in the substitution,</span></span>
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1713
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<pre style="margin: 0;">-<span id="LC1713" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- overriding any d->dx_id binding put there by substBndrs</span></span>
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1714
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<pre style="margin: 0;">-<span id="LC1714" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"bindAuxiliaryDicts"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">orig_dict_ids</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">call_ds</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">inst_dict_ids</span><span class="p">)</span></span>
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1715
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<pre style="margin: 0;">-<span id="LC1715" class="line" lang="haskell"></span>
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1716
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<pre style="margin: 0;">-<span id="LC1716" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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1717
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<pre style="margin: 0;">-<span id="LC1717" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Make the new dictionaries interesting]</span></span>
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1718
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<pre style="margin: 0;">-<span id="LC1718" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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1719
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<pre style="margin: 0;">-<span id="LC1719" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Important! We're going to substitute dx_id1 for d</span></span>
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1720
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<pre style="margin: 0;">-<span id="LC1720" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and we want it to look "interesting", else we won't gather *any*</span></span>
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1721
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<pre style="margin: 0;">-<span id="LC1721" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">consequential calls. E.g.</span></span>
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1722
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<pre style="margin: 0;">-<span id="LC1722" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f d = ...g d....</span></span>
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1723
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<pre style="margin: 0;">-<span id="LC1723" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">If we specialise f for a call (f (dfun dNumInt)), we'll get</span></span>
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<pre style="margin: 0;">-<span id="LC1724" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">a consequent call (g d') with an auxiliary definition</span></span>
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<pre style="margin: 0;">-<span id="LC1725" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> d' = df dNumInt</span></span>
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<pre style="margin: 0;">-<span id="LC1726" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We want that consequent call to look interesting</span></span>
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<pre style="margin: 0;">-<span id="LC1727" class="line" lang="haskell"></span>
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1728
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1587
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<pre style="margin: 0;"> <span id="LC1587" class="line" lang="haskell"></span>
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1729
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1588
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<pre style="margin: 0;"> <span id="LC1588" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [From non-recursive to recursive]</span></span>
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1730
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1589
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<pre style="margin: 0;"> <span id="LC1589" 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">@@ -2060,15 +1919,297 @@ a complete solution; ignoring specialisation for now, INLINABLE functions</td>
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2060
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1919
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<pre style="margin: 0;"> <span id="LC1919" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">don't get properly strictness analysed, for example. But it works well</span></span>
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2061
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1920
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<pre style="margin: 0;"> <span id="LC1920" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">for examples involving specialisation, which is the dominant use of</span></span>
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2062
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<pre style="margin: 0;"> <span id="LC1921" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">INLINABLE. See #4874.</span></span>
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1922
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<pre style="margin: 0;">+<span id="LC1922" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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1923
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<pre style="margin: 0;"> <span id="LC1923" class="line" lang="haskell"></span>
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2064
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<pre style="margin: 0;">-<span id="LC2064" class="line" lang="haskell"></span>
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2065
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<pre style="margin: 0;">-<span id="LC2065" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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1924
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<pre style="margin: 0;">+<span id="LC1924" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
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2066
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1925
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<pre style="margin: 0;"> <span id="LC1925" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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2067
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<pre style="margin: 0;">-<span id="LC2067" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">\subsubsection{UsageDetails and suchlike}</span></span></span>
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<pre style="margin: 0;">+<span id="LC1926" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right"> SpecArg, and specHeader</span></span></span>
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2068
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1927
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<pre style="margin: 0;"> <span id="LC1927" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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2069
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<pre style="margin: 0;">-<span id="LC2069" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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1928
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<pre style="margin: 0;">+<span id="LC1928" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">********************************************************************* -}</span></span>
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1929
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<pre style="margin: 0;">+<span id="LC1929" class="line" lang="haskell"></span>
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1930
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<pre style="margin: 0;">+<span id="LC1930" class="line" lang="haskell"><span class="cd">-- | An argument that we might want to specialise.</span></span>
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1931
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<pre style="margin: 0;">+<span id="LC1931" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialising Calls] for the nitty gritty details.</span></span>
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1932
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<pre style="margin: 0;">+<span id="LC1932" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">SpecArg</span></span>
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1933
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<pre style="margin: 0;">+<span id="LC1933" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span></span>
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1934
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<pre style="margin: 0;">+<span id="LC1934" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Type arguments that should be specialised, due to appearing</span></span>
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1935
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<pre style="margin: 0;">+<span id="LC1935" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- free in the type of a 'SpecDict'.</span></span>
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1936
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<pre style="margin: 0;">+<span id="LC1936" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">SpecType</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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1937
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<pre style="margin: 0;">+<span id="LC1937" class="line" lang="haskell"></span>
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1938
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<pre style="margin: 0;">+<span id="LC1938" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Type arguments that should remain polymorphic.</span></span>
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1939
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<pre style="margin: 0;">+<span id="LC1939" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecType</span></span>
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1940
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<pre style="margin: 0;">+<span id="LC1940" class="line" lang="haskell"></span>
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1941
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<pre style="margin: 0;">+<span id="LC1941" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Dictionaries that should be specialised. mkCallUDs ensures</span></span>
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1942
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<pre style="margin: 0;">+<span id="LC1942" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- that only "interesting" dictionary arguments get a SpecDict;</span></span>
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1943
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<pre style="margin: 0;">+<span id="LC1943" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- see Note [Interesting dictionary arguments]</span></span>
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1944
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<pre style="margin: 0;">+<span id="LC1944" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">SpecDict</span> <span class="kt" style="color: #458; font-weight: 600;">DictExpr</span></span>
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1945
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<pre style="margin: 0;">+<span id="LC1945" class="line" lang="haskell"></span>
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1946
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<pre style="margin: 0;">+<span id="LC1946" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Value arguments that should not be specialised.</span></span>
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1947
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<pre style="margin: 0;">+<span id="LC1947" 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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1948
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<pre style="margin: 0;">+<span id="LC1948" class="line" lang="haskell"></span>
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1949
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<pre style="margin: 0;">+<span id="LC1949" 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;">SpecArg</span> <span class="kr" style="font-weight: 600;">where</span></span>
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1950
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<pre style="margin: 0;">+<span id="LC1950" 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;">SpecType</span> <span class="n" style="color: #333;">t</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;">"SpecType"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">t</span></span>
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1951
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<pre style="margin: 0;">+<span id="LC1951" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecType</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"UnspecType"</span></span>
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1952
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<pre style="margin: 0;">+<span id="LC1952" 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;">SpecDict</span> <span class="n" style="color: #333;">d</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;">"SpecDict"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">d</span></span>
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1953
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<pre style="margin: 0;">+<span id="LC1953" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecArg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"UnspecArg"</span></span>
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1954
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<pre style="margin: 0;">+<span id="LC1954" class="line" lang="haskell"></span>
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1955
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<pre style="margin: 0;">+<span id="LC1955" class="line" lang="haskell"><span class="n" style="color: #333;">specArgFreeVars</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SpecArg</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span></span>
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1956
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<pre style="margin: 0;">+<span id="LC1956" class="line" lang="haskell"><span class="n" style="color: #333;">specArgFreeVars</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SpecType</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;">tyCoVarsOfType</span> <span class="n" style="color: #333;">ty</span></span>
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1957
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<pre style="margin: 0;">+<span id="LC1957" class="line" lang="haskell"><span class="n" style="color: #333;">specArgFreeVars</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SpecDict</span> <span class="n" style="color: #333;">dx</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprFreeVars</span> <span class="n" style="color: #333;">dx</span></span>
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1958
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<pre style="margin: 0;">+<span id="LC1958" class="line" lang="haskell"><span class="n" style="color: #333;">specArgFreeVars</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecType</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyVarSet</span></span>
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1959
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<pre style="margin: 0;">+<span id="LC1959" class="line" lang="haskell"><span class="n" style="color: #333;">specArgFreeVars</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecArg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyVarSet</span></span>
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1960
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<pre style="margin: 0;">+<span id="LC1960" class="line" lang="haskell"></span>
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1961
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<pre style="margin: 0;">+<span id="LC1961" class="line" lang="haskell"><span class="n" style="color: #333;">isSpecDict</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SpecArg</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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1962
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<pre style="margin: 0;">+<span id="LC1962" class="line" lang="haskell"><span class="n" style="color: #333;">isSpecDict</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SpecDict</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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1963
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<pre style="margin: 0;">+<span id="LC1963" class="line" lang="haskell"><span class="n" style="color: #333;">isSpecDict</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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1964
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<pre style="margin: 0;">+<span id="LC1964" class="line" lang="haskell"></span>
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1965
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<pre style="margin: 0;">+<span id="LC1965" class="line" lang="haskell"><span class="cd">-- | Given binders from an original function 'f', and the 'SpecArg's</span></span>
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1966
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<pre style="margin: 0;">+<span id="LC1966" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- corresponding to its usage, compute everything necessary to build</span></span>
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1967
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<pre style="margin: 0;">+<span id="LC1967" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a specialisation.</span></span>
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1968
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<pre style="margin: 0;">+<span id="LC1968" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1969
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<pre style="margin: 0;">+<span id="LC1969" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We will use the running example from Note [Specialising Calls]:</span></span>
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1970
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<pre style="margin: 0;">+<span id="LC1970" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1971
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<pre style="margin: 0;">+<span id="LC1971" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- f :: forall a b c. Int -> Eq a => Show b => c -> Blah</span></span>
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1972
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<pre style="margin: 0;">+<span id="LC1972" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- f @a @b @c i dEqA dShowA x = blah</span></span>
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1973
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<pre style="margin: 0;">+<span id="LC1973" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1974
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<pre style="margin: 0;">+<span id="LC1974" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Suppose we decide to specialise it at the following pattern:</span></span>
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1975
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<pre style="margin: 0;">+<span id="LC1975" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1976
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<pre style="margin: 0;">+<span id="LC1976" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- [ SpecType T1, SpecType T2, UnspecType, UnspecArg</span></span>
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1977
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<pre style="margin: 0;">+<span id="LC1977" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , SpecDict dEqT1, SpecDict ($dfShow dShowT2), UnspecArg ]</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1978" 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">
1978
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<pre style="margin: 0;">+<span id="LC1978" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1979" 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">
1979
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<pre style="margin: 0;">+<span id="LC1979" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We'd eventually like to build the RULE</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1980" 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">
1980
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<pre style="margin: 0;">+<span id="LC1980" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1981" 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">
1981
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<pre style="margin: 0;">+<span id="LC1981" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- RULE "SPEC f @T1 @T2 _"</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1982" 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">
1982
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<pre style="margin: 0;">+<span id="LC1982" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- forall (@c :: Type) (i :: Int) (d1 :: Eq T1) (d2 :: Show T2).</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1983" 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">
1983
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<pre style="margin: 0;">+<span id="LC1983" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- f @T1 @T2 @c i d1 d2 = $sf @c i</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1984" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1984
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<pre style="margin: 0;">+<span id="LC1984" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1985" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1985
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<pre style="margin: 0;">+<span id="LC1985" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- and the specialisation '$sf'</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1986" 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">
1986
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<pre style="margin: 0;">+<span id="LC1986" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1987" 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">
1987
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<pre style="margin: 0;">+<span id="LC1987" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- $sf :: forall c. Int -> c -> Blah</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1988" 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">
1988
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<pre style="margin: 0;">+<span id="LC1988" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- $sf = SUBST[a :-> T1, b :-> T2, dEqA :-> dEqT1, dShowA :-> dShow1] (\@c i x -> blah)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1989" 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">
1989
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<pre style="margin: 0;">+<span id="LC1989" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1990" 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">
1990
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<pre style="margin: 0;">+<span id="LC1990" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- where dShow1 is a floated binding created by bindAuxiliaryDict.</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1991" 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">
1991
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<pre style="margin: 0;">+<span id="LC1991" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1992" 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">
1992
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<pre style="margin: 0;">+<span id="LC1992" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The cases for 'specHeader' below are presented in the same order as this</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1993" 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">
1993
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<pre style="margin: 0;">+<span id="LC1993" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- running example. The result of 'specHeader' for this example is as follows:</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1994" 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">
1994
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<pre style="margin: 0;">+<span id="LC1994" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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</td>
<td class="diff-line-num new new_line" data-linenumber="1995" 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">
1995
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<pre style="margin: 0;">+<span id="LC1995" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ( -- Returned arguments</span></span>
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</td>
<td class="diff-line-num new new_line" data-linenumber="1996" 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">
1996
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<pre style="margin: 0;">+<span id="LC1996" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- env + [a :-> T1, b :-> T2, dEqA :-> dEqT1, dShowA :-> dShow1]</span></span>
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</td>
<td class="diff-line-num new new_line" data-linenumber="1997" 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">
1997
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<pre style="margin: 0;">+<span id="LC1997" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [x]</span></span>
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</td>
<td class="diff-line-num new new_line" data-linenumber="1998" 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">
1998
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<pre style="margin: 0;">+<span id="LC1998" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
</pre>
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</td>
<td class="diff-line-num new new_line" data-linenumber="1999" 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">
1999
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<pre style="margin: 0;">+<span id="LC1999" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- -- RULE helpers</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2000" 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">
2000
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<pre style="margin: 0;">+<span id="LC2000" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [c, i, d1, d2]</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2001" 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">
2001
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<pre style="margin: 0;">+<span id="LC2001" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [T1, T2, c, i, d1, d2]</span></span>
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2002
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<pre style="margin: 0;">+<span id="LC2002" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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2003
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<pre style="margin: 0;">+<span id="LC2003" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- -- Specialised function helpers</span></span>
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2004
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<pre style="margin: 0;">+<span id="LC2004" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [c, i, x]</span></span>
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2005
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<pre style="margin: 0;">+<span id="LC2005" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [dShow1 = $dfShow dShowT2]</span></span>
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2006
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<pre style="margin: 0;">+<span id="LC2006" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , [T1, T2, dEqT1, dShow1]</span></span>
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2007
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<pre style="margin: 0;">+<span id="LC2007" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- )</span></span>
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2008
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<pre style="margin: 0;">+<span id="LC2008" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span></span>
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2009
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<pre style="margin: 0;">+<span id="LC2009" 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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<td class="diff-line-num new new_line" data-linenumber="2010" 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">
2010
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<pre style="margin: 0;">+<span id="LC2010" 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;">InBndr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- The binders from the original function 'f'</span></span>
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2011
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<pre style="margin: 0;">+<span id="LC2011" 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;">SpecArg</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- From the CallInfo</span></span>
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2012
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<pre style="margin: 0;">+<span id="LC2012" 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="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="c1" style="color: #998; font-style: italic;">-- True <=> some useful specialisation happened</span></span>
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2013
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<pre style="margin: 0;">+<span id="LC2013" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Not the same as any (isSpecDict args) because</span></span>
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2014
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<pre style="margin: 0;">+<span id="LC2014" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- the args might be longer than bndrs</span></span>
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2015
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<pre style="margin: 0;">+<span id="LC2015" class="line" lang="haskell"></span>
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2016
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<pre style="margin: 0;">+<span id="LC2016" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Returned arguments</span></span>
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2017
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<pre style="margin: 0;">+<span id="LC2017" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span> <span class="c1" style="color: #998; font-style: italic;">-- Substitution to apply to the body of 'f'</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2018" 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">
2018
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<pre style="margin: 0;">+<span id="LC2018" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">OutBndr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Leftover binders from the original function 'f'</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2019" 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">
2019
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<pre style="margin: 0;">+<span id="LC2019" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- that don’t have a corresponding SpecArg</span></span>
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2020
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<pre style="margin: 0;">+<span id="LC2020" class="line" lang="haskell"></span>
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2021
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<pre style="margin: 0;">+<span id="LC2021" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- RULE helpers</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2022" 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">
2022
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<pre style="margin: 0;">+<span id="LC2022" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">OutBndr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Binders for the RULE</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2023" 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">
2023
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<pre style="margin: 0;">+<span id="LC2023" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreArg</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Args for the LHS of the rule</span></span>
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2024
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<pre style="margin: 0;">+<span id="LC2024" class="line" lang="haskell"></span>
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2025
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<pre style="margin: 0;">+<span id="LC2025" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Specialised function helpers</span></span>
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2026
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<pre style="margin: 0;">+<span id="LC2026" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">OutBndr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Binders for $sf</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2027" 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">
2027
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<pre style="margin: 0;">+<span id="LC2027" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">DictBind</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Auxiliary dictionary bindings</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2028" 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">
2028
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<pre style="margin: 0;">+<span id="LC2028" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">OutExpr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Specialised arguments for unfolding</span></span>
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2029
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<pre style="margin: 0;">+<span id="LC2029" class="line" lang="haskell"> <span class="p">)</span></span>
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2030
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<pre style="margin: 0;">+<span id="LC2030" class="line" lang="haskell"></span>
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2031
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<pre style="margin: 0;">+<span id="LC2031" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We want to specialise on type 'T1', and so we must construct a substitution</span></span>
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2032
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<pre style="margin: 0;">+<span id="LC2032" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'a->T1', as well as a LHS argument for the resulting RULE and unfolding</span></span>
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2033
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<pre style="margin: 0;">+<span id="LC2033" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- details.</span></span>
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2034
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<pre style="margin: 0;">+<span id="LC2034" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SpecType</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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2035
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<pre style="margin: 0;">+<span id="LC2035" 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;">env'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendTvSubstList</span> <span class="n" style="color: #333;">env</span> <span class="p">[(</span><span class="n" style="color: #333;">bndr</span><span class="p">,</span> <span class="n" style="color: #333;">t</span><span class="p">)]</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2036" 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">
2036
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<pre style="margin: 0;">+<span id="LC2036" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">useful</span><span class="p">,</span> <span class="n" style="color: #333;">env''</span><span class="p">,</span> <span class="n" style="color: #333;">leftover_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_bs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_es</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">,</span> <span class="n" style="color: #333;">dx</span><span class="p">,</span> <span class="n" style="color: #333;">spec_args</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2037" 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">
2037
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<pre style="margin: 0;">+<span id="LC2037" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">args</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2038" 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">
2038
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<pre style="margin: 0;">+<span id="LC2038" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span> <span class="n" style="color: #333;">useful</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2039" 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">
2039
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<pre style="margin: 0;">+<span id="LC2039" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">env''</span></span>
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2040
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<pre style="margin: 0;">+<span id="LC2040" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">leftover_bndrs</span></span>
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2041
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<pre style="margin: 0;">+<span id="LC2041" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">rule_bs</span></span>
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2042
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<pre style="margin: 0;">+<span id="LC2042" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_es</span></span>
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2043
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<pre style="margin: 0;">+<span id="LC2043" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">bs'</span></span>
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2044
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<pre style="margin: 0;">+<span id="LC2044" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">dx</span></span>
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2045
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<pre style="margin: 0;">+<span id="LC2045" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">spec_args</span></span>
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2046
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<pre style="margin: 0;">+<span id="LC2046" class="line" lang="haskell"> <span class="p">)</span></span>
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2047
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<pre style="margin: 0;">+<span id="LC2047" class="line" lang="haskell"> <span class="p">}</span></span>
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2048
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<pre style="margin: 0;">+<span id="LC2048" class="line" lang="haskell"></span>
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2049
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<pre style="margin: 0;">+<span id="LC2049" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Next we have a type that we don't want to specialise. We need to perform</span></span>
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2050
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<pre style="margin: 0;">+<span id="LC2050" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a substitution on it (in case the type refers to 'a'). Additionally, we need</span></span>
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2051
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<pre style="margin: 0;">+<span id="LC2051" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- to produce a binder, LHS argument and RHS argument for the resulting rule,</span></span>
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2052
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<pre style="margin: 0;">+<span id="LC2052" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- /and/ a binder for the specialised body.</span></span>
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2053
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<pre style="margin: 0;">+<span id="LC2053" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnspecType</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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2054
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<pre style="margin: 0;">+<span id="LC2054" 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;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">bndr'</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;">env</span> <span class="n" style="color: #333;">bndr</span></span>
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2055
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<pre style="margin: 0;">+<span id="LC2055" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">useful</span><span class="p">,</span> <span class="n" style="color: #333;">env''</span><span class="p">,</span> <span class="n" style="color: #333;">leftover_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_bs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_es</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">,</span> <span class="n" style="color: #333;">dx</span><span class="p">,</span> <span class="n" style="color: #333;">spec_args</span><span class="p">)</span></span>
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2056
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<pre style="margin: 0;">+<span id="LC2056" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">args</span></span>
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2057
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<pre style="margin: 0;">+<span id="LC2057" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span> <span class="n" style="color: #333;">useful</span></span>
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2058
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<pre style="margin: 0;">+<span id="LC2058" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">env''</span></span>
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2059
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<pre style="margin: 0;">+<span id="LC2059" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">leftover_bndrs</span></span>
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2060
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<pre style="margin: 0;">+<span id="LC2060" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_bs</span></span>
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2061
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<pre style="margin: 0;">+<span id="LC2061" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_es</span></span>
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2062
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<pre style="margin: 0;">+<span id="LC2062" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bs'</span></span>
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2063
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<pre style="margin: 0;">+<span id="LC2063" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">dx</span></span>
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2064
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<pre style="margin: 0;">+<span id="LC2064" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">spec_args</span></span>
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2065
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<pre style="margin: 0;">+<span id="LC2065" class="line" lang="haskell"> <span class="p">)</span></span>
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2066
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<pre style="margin: 0;">+<span id="LC2066" class="line" lang="haskell"> <span class="p">}</span></span>
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2067
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<pre style="margin: 0;">+<span id="LC2067" class="line" lang="haskell"></span>
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2068
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<pre style="margin: 0;">+<span id="LC2068" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Next we want to specialise the 'Eq a' dict away. We need to construct</span></span>
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2069
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<pre style="margin: 0;">+<span id="LC2069" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a wildcard binder to match the dictionary (See Note [Specialising Calls] for</span></span>
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2070
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<pre style="margin: 0;">+<span id="LC2070" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the nitty-gritty), as a LHS rule and unfolding details.</span></span>
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2071
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<pre style="margin: 0;">+<span id="LC2071" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SpecDict</span> <span class="n" style="color: #333;">d</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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2072
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<pre style="margin: 0;">+<span id="LC2072" 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;">bndr'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newDictBndr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bndr</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Zap occ info in rule binders]</span></span>
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2073
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<pre style="margin: 0;">+<span id="LC2073" 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;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">dx_bind</span><span class="p">,</span> <span class="n" style="color: #333;">spec_dict</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bindAuxiliaryDict</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bndr</span> <span class="n" style="color: #333;">bndr'</span> <span class="n" style="color: #333;">d</span></span>
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2074
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<pre style="margin: 0;">+<span id="LC2074" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">env''</span><span class="p">,</span> <span class="n" style="color: #333;">leftover_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_bs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_es</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">,</span> <span class="n" style="color: #333;">dx</span><span class="p">,</span> <span class="n" style="color: #333;">spec_args</span><span class="p">)</span></span>
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2075
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<pre style="margin: 0;">+<span id="LC2075" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">args</span></span>
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2076
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<pre style="margin: 0;">+<span id="LC2076" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="c1" style="color: #998; font-style: italic;">-- Ha! A useful specialisation!</span></span>
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2077
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<pre style="margin: 0;">+<span id="LC2077" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">env''</span></span>
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2078
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<pre style="margin: 0;">+<span id="LC2078" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">leftover_bndrs</span></span>
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2079
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<pre style="margin: 0;">+<span id="LC2079" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Evidence foralls]</span></span>
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2080
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<pre style="margin: 0;">+<span id="LC2080" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">exprFreeIdsList</span> <span class="p">(</span><span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">bndr'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">rule_bs</span></span>
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2081
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<pre style="margin: 0;">+<span id="LC2081" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_es</span></span>
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2082
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<pre style="margin: 0;">+<span id="LC2082" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">bs'</span></span>
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2083
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<pre style="margin: 0;">+<span id="LC2083" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">maybeToList</span> <span class="n" style="color: #333;">dx_bind</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">dx</span></span>
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2084
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<pre style="margin: 0;">+<span id="LC2084" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">spec_dict</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">spec_args</span></span>
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2085
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<pre style="margin: 0;">+<span id="LC2085" class="line" lang="haskell"> <span class="p">)</span></span>
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2086
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<pre style="margin: 0;">+<span id="LC2086" class="line" lang="haskell"> <span class="p">}</span></span>
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2087
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<pre style="margin: 0;">+<span id="LC2087" class="line" lang="haskell"></span>
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2088
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<pre style="margin: 0;">+<span id="LC2088" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Finally, we have the unspecialised argument 'i'. We need to produce</span></span>
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2089
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<pre style="margin: 0;">+<span id="LC2089" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a binder, LHS and RHS argument for the RULE, and a binder for the</span></span>
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2090
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<pre style="margin: 0;">+<span id="LC2090" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- specialised body.</span></span>
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2091
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<pre style="margin: 0;">+<span id="LC2091" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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2092
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<pre style="margin: 0;">+<span id="LC2092" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- NB: Calls to 'specHeader' will trim off any trailing 'UnspecArg's, which is</span></span>
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2093
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<pre style="margin: 0;">+<span id="LC2093" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- why 'i' doesn't appear in our RULE above. But we have no guarantee that</span></span>
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2094
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<pre style="margin: 0;">+<span id="LC2094" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- there aren't 'UnspecArg's which come /before/ all of the dictionaries, so</span></span>
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2095
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<pre style="margin: 0;">+<span id="LC2095" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- this case must be here.</span></span>
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2096
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<pre style="margin: 0;">+<span id="LC2096" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnspecArg</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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2097
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<pre style="margin: 0;">+<span id="LC2097" 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;">-- see Note [Zap occ info in rule binders]</span></span>
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2098
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<pre style="margin: 0;">+<span id="LC2098" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">bndr'</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;">env</span> <span class="p">(</span><span class="n" style="color: #333;">zapIdOccInfo</span> <span class="n" style="color: #333;">bndr</span><span class="p">)</span></span>
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2099
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<pre style="margin: 0;">+<span id="LC2099" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">useful</span><span class="p">,</span> <span class="n" style="color: #333;">env''</span><span class="p">,</span> <span class="n" style="color: #333;">leftover_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_bs</span><span class="p">,</span> <span class="n" style="color: #333;">rule_es</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">,</span> <span class="n" style="color: #333;">dx</span><span class="p">,</span> <span class="n" style="color: #333;">spec_args</span><span class="p">)</span></span>
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2100
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<pre style="margin: 0;">+<span id="LC2100" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">args</span></span>
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2101
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<pre style="margin: 0;">+<span id="LC2101" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span> <span class="n" style="color: #333;">useful</span></span>
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2102
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<pre style="margin: 0;">+<span id="LC2102" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">env''</span></span>
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2103
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<pre style="margin: 0;">+<span id="LC2103" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">leftover_bndrs</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2104" 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">
2104
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<pre style="margin: 0;">+<span id="LC2104" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_bs</span></span>
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2105
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<pre style="margin: 0;">+<span id="LC2105" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rule_es</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2106" 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">
2106
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<pre style="margin: 0;">+<span id="LC2106" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">isDeadBinder</span> <span class="n" style="color: #333;">bndr</span></span>
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<td class="diff-line-num new new_line" data-linenumber="2107" 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">
2107
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<pre style="margin: 0;">+<span id="LC2107" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">bs'</span> <span class="c1" style="color: #998; font-style: italic;">-- see Note [Drop dead args from specialisations]</span></span>
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2108
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<pre style="margin: 0;">+<span id="LC2108" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bs'</span></span>
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2109
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<pre style="margin: 0;">+<span id="LC2109" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">dx</span></span>
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2110
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<pre style="margin: 0;">+<span id="LC2110" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">varToCoreExpr</span> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">spec_args</span></span>
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2111
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<pre style="margin: 0;">+<span id="LC2111" class="line" lang="haskell"> <span class="p">)</span></span>
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2112
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<pre style="margin: 0;">+<span id="LC2112" class="line" lang="haskell"> <span class="p">}</span></span>
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2113
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<pre style="margin: 0;">+<span id="LC2113" class="line" lang="haskell"></span>
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2114
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<pre style="margin: 0;">+<span id="LC2114" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If we run out of binders, stop immediately</span></span>
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2115
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<pre style="margin: 0;">+<span id="LC2115" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialisation Must Preserve Sharing]</span></span>
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2116
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<pre style="margin: 0;">+<span id="LC2116" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">,</span> <span class="n" style="color: #333;">env</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="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="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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2117
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<pre style="margin: 0;">+<span id="LC2117" class="line" lang="haskell"></span>
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2118
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<pre style="margin: 0;">+<span id="LC2118" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Return all remaining binders from the original function. These have the</span></span>
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2119
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<pre style="margin: 0;">+<span id="LC2119" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- invariant that they should all correspond to unspecialised arguments, so</span></span>
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2120
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<pre style="margin: 0;">+<span id="LC2120" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- it's safe to stop processing at this point.</span></span>
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2121
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<pre style="margin: 0;">+<span id="LC2121" class="line" lang="haskell"><span class="n" style="color: #333;">specHeader</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bndrs</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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2122
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<pre style="margin: 0;">+<span id="LC2122" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">,</span> <span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">bndrs'</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="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="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span></span>
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2123
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<pre style="margin: 0;">+<span id="LC2123" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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2124
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<pre style="margin: 0;">+<span id="LC2124" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">bndrs'</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;">env</span> <span class="n" style="color: #333;">bndrs</span></span>
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2125
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<pre style="margin: 0;">+<span id="LC2125" class="line" lang="haskell"></span>
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2126
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<pre style="margin: 0;">+<span id="LC2126" class="line" lang="haskell"></span>
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2127
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<pre style="margin: 0;">+<span id="LC2127" class="line" lang="haskell"><span class="cd">-- | Binds a dictionary argument to a fresh name, to preserve sharing</span></span>
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2128
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<pre style="margin: 0;">+<span id="LC2128" class="line" lang="haskell"><span class="n" style="color: #333;">bindAuxiliaryDict</span></span>
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2129
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<pre style="margin: 0;">+<span id="LC2129" 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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2130
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<pre style="margin: 0;">+<span id="LC2130" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">InId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">OutId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">OutExpr</span> <span class="c1" style="color: #998; font-style: italic;">-- Original dict binder, and the witnessing expression</span></span>
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2131
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<pre style="margin: 0;">+<span id="LC2131" 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;">SpecEnv</span> <span class="c1" style="color: #998; font-style: italic;">-- Substitute for orig_dict_id</span></span>
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2132
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<pre style="margin: 0;">+<span id="LC2132" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">DictBind</span> <span class="c1" style="color: #998; font-style: italic;">-- Auxiliary dict binding, if any</span></span>
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2133
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<pre style="margin: 0;">+<span id="LC2133" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">OutExpr</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Witnessing expression (always trivial)</span></span>
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2134
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<pre style="margin: 0;">+<span id="LC2134" class="line" lang="haskell"><span class="n" style="color: #333;">bindAuxiliaryDict</span> <span class="n" style="color: #333;">env</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</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="n" style="color: #333;">subst</span><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;">interesting</span> <span class="p">})</span></span>
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2135
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<pre style="margin: 0;">+<span id="LC2135" class="line" lang="haskell"> <span class="n" style="color: #333;">orig_dict_id</span> <span class="n" style="color: #333;">fresh_dict_id</span> <span class="n" style="color: #333;">dict_expr</span></span>
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2136
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<pre style="margin: 0;">+<span id="LC2136" class="line" lang="haskell"></span>
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2137
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<pre style="margin: 0;">+<span id="LC2137" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- If the dictionary argument is trivial,</span></span>
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2138
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<pre style="margin: 0;">+<span id="LC2138" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- don’t bother creating a new dict binding; just substitute</span></span>
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2139
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<pre style="margin: 0;">+<span id="LC2139" 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;">dict_id</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getIdFromTrivialExpr_maybe</span> <span class="n" style="color: #333;">dict_expr</span></span>
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2140
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<pre style="margin: 0;">+<span id="LC2140" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">env'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</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;">extendSubst</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">orig_dict_id</span> <span class="n" style="color: #333;">dict_expr</span></span>
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2141
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<pre style="margin: 0;">+<span id="LC2141" class="line" lang="haskell"> <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;">extendInScope</span><span class="p">`</span> <span class="n" style="color: #333;">dict_id</span></span>
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2142
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<pre style="margin: 0;">+<span id="LC2142" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Keep the old dictionaries interesting]</span></span>
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2143
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<pre style="margin: 0;">+<span id="LC2143" 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;">interesting</span> <span class="p">`</span><span class="n" style="color: #333;">extendVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">dict_id</span> <span class="p">}</span></span>
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2144
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<pre style="margin: 0;">+<span id="LC2144" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span><span class="p">,</span> <span class="n" style="color: #333;">dict_expr</span><span class="p">)</span></span>
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2145
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<pre style="margin: 0;">+<span id="LC2145" class="line" lang="haskell"></span>
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2146
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<pre style="margin: 0;">+<span id="LC2146" 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;">-- Non-trivial dictionary arg; make an auxiliary binding</span></span>
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2147
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<pre style="margin: 0;">+<span id="LC2147" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">dict_bind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkDB</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">fresh_dict_id</span> <span class="n" style="color: #333;">dict_expr</span><span class="p">)</span></span>
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2148
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<pre style="margin: 0;">+<span id="LC2148" class="line" lang="haskell"> <span class="n" style="color: #333;">env'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</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;">extendSubst</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">orig_dict_id</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">fresh_dict_id</span><span class="p">)</span></span>
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2149
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<pre style="margin: 0;">+<span id="LC2149" class="line" lang="haskell"> <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;">extendInScope</span><span class="p">`</span> <span class="n" style="color: #333;">fresh_dict_id</span></span>
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2150
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<pre style="margin: 0;">+<span id="LC2150" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Make the new dictionaries interesting]</span></span>
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2151
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<pre style="margin: 0;">+<span id="LC2151" 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;">interesting</span> <span class="p">`</span><span class="n" style="color: #333;">extendVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">fresh_dict_id</span> <span class="p">}</span></span>
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2152
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<pre style="margin: 0;">+<span id="LC2152" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">dict_bind</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">fresh_dict_id</span><span class="p">)</span></span>
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2153
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<pre style="margin: 0;">+<span id="LC2153" class="line" lang="haskell"></span>
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2154
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<pre style="margin: 0;">+<span id="LC2154" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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2155
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<pre style="margin: 0;">+<span id="LC2155" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Make the new dictionaries interesting]</span></span>
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2156
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<pre style="margin: 0;">+<span id="LC2156" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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2157
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<pre style="margin: 0;">+<span id="LC2157" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Important! We're going to substitute dx_id1 for d</span></span>
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2158
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<pre style="margin: 0;">+<span id="LC2158" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and we want it to look "interesting", else we won't gather *any*</span></span>
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2159
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<pre style="margin: 0;">+<span id="LC2159" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">consequential calls. E.g.</span></span>
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2160
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<pre style="margin: 0;">+<span id="LC2160" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f d = ...g d....</span></span>
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2161
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<pre style="margin: 0;">+<span id="LC2161" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">If we specialise f for a call (f (dfun dNumInt)), we'll get</span></span>
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2162
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<pre style="margin: 0;">+<span id="LC2162" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">a consequent call (g d') with an auxiliary definition</span></span>
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2163
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<pre style="margin: 0;">+<span id="LC2163" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> d' = df dNumInt</span></span>
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2164
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<pre style="margin: 0;">+<span id="LC2164" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We want that consequent call to look interesting</span></span>
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2165
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<pre style="margin: 0;">+<span id="LC2165" class="line" lang="haskell"></span>
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2166
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<pre style="margin: 0;">+<span id="LC2166" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Keep the old dictionaries interesting]</span></span>
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2167
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<pre style="margin: 0;">+<span id="LC2167" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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2168
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<pre style="margin: 0;">+<span id="LC2168" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In bindAuxiliaryDict, we don’t bother creating a new dict binding if</span></span>
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2169
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<pre style="margin: 0;">+<span id="LC2169" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the dict expression is trivial. For example, if we have</span></span>
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2170
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<pre style="margin: 0;">+<span id="LC2170" class="line" lang="haskell"></span>
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2171
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<pre style="margin: 0;">+<span id="LC2171" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f = \ @m1 (d1 :: Monad m1) -> ...</span></span>
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2172
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<pre style="margin: 0;">+<span id="LC2172" class="line" lang="haskell"></span>
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2173
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<pre style="margin: 0;">+<span id="LC2173" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and we specialize it at the pattern</span></span>
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2174
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<pre style="margin: 0;">+<span id="LC2174" class="line" lang="haskell"></span>
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2175
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<pre style="margin: 0;">+<span id="LC2175" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> [SpecType IO, SpecArg $dMonadIO]</span></span>
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2176
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<pre style="margin: 0;">+<span id="LC2176" class="line" lang="haskell"></span>
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2177
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<pre style="margin: 0;">+<span id="LC2177" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">it would be silly to create a new binding for $dMonadIO; it’s already</span></span>
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2178
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<pre style="margin: 0;">+<span id="LC2178" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">a binding! So we just extend the substitution directly:</span></span>
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2179
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<pre style="margin: 0;">+<span id="LC2179" class="line" lang="haskell"></span>
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2180
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<pre style="margin: 0;">+<span id="LC2180" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> m1 :-> IO</span></span>
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2181
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<pre style="margin: 0;">+<span id="LC2181" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> d1 :-> $dMonadIO</span></span>
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2182
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<pre style="margin: 0;">+<span id="LC2182" class="line" lang="haskell"></span>
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2183
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<pre style="margin: 0;">+<span id="LC2183" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But this creates a new subtlety: the dict expression might be a dict</span></span>
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2184
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<pre style="margin: 0;">+<span id="LC2184" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">binding we floated out while specializing another function. For</span></span>
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2185
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<pre style="margin: 0;">+<span id="LC2185" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">example, we might have</span></span>
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2186
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<pre style="margin: 0;">+<span id="LC2186" class="line" lang="haskell"></span>
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2187
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<pre style="margin: 0;">+<span id="LC2187" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> d2 = $p1Monad $dMonadIO -- floated out by bindAuxiliaryDict</span></span>
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2188
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<pre style="margin: 0;">+<span id="LC2188" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> $sg = h @IO d2</span></span>
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2189
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<pre style="margin: 0;">+<span id="LC2189" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> h = \ @m2 (d2 :: Applicative m2) -> ...</span></span>
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2190
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<pre style="margin: 0;">+<span id="LC2190" class="line" lang="haskell"></span>
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2191
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<pre style="margin: 0;">+<span id="LC2191" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and end up specializing h at the following pattern:</span></span>
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2192
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<pre style="margin: 0;">+<span id="LC2192" class="line" lang="haskell"></span>
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2193
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<pre style="margin: 0;">+<span id="LC2193" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> [SpecType IO, SpecArg d2]</span></span>
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2194
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<pre style="margin: 0;">+<span id="LC2194" class="line" lang="haskell"></span>
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2195
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<pre style="margin: 0;">+<span id="LC2195" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When we created the d2 binding in the first place, we locally marked</span></span>
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2196
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<pre style="margin: 0;">+<span id="LC2196" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">it as interesting while specializing g as described above by</span></span>
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2197
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<pre style="margin: 0;">+<span id="LC2197" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Make the new dictionaries interesting]. But when we go to</span></span>
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2198
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<pre style="margin: 0;">+<span id="LC2198" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">specialize h, it isn’t in the SpecEnv anymore, so we’ve lost the</span></span>
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2199
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<pre style="margin: 0;">+<span id="LC2199" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">knowledge that we should specialize on it.</span></span>
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2200
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<pre style="margin: 0;">+<span id="LC2200" class="line" lang="haskell"></span>
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2201
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<pre style="margin: 0;">+<span id="LC2201" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">To fix this, we have to explicitly add d2 *back* to the interesting</span></span>
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2202
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<pre style="margin: 0;">+<span id="LC2202" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">set. That way, it will still be considered interesting while</span></span>
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2203
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<pre style="margin: 0;">+<span id="LC2203" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">specializing the body of h. See !2913.</span></span>
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2070
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2204
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<pre style="margin: 0;"> <span id="LC2204" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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2071
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2205
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<pre style="margin: 0;"> <span id="LC2205" class="line" lang="haskell"></span>
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2206
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<pre style="margin: 0;">+<span id="LC2206" class="line" lang="haskell"></span>
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2207
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<pre style="margin: 0;">+<span id="LC2207" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
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2208
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<pre style="margin: 0;">+<span id="LC2208" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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2209
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<pre style="margin: 0;">+<span id="LC2209" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> UsageDetails and suchlike</span></span>
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2210
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<pre style="margin: 0;">+<span id="LC2210" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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2211
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<pre style="margin: 0;">+<span id="LC2211" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">********************************************************************* -}</span></span>
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2212
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<pre style="margin: 0;">+<span id="LC2212" class="line" lang="haskell"></span>
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2072
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2213
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<pre style="margin: 0;"> <span id="LC2213" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span></span>
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2073
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2214
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<pre style="margin: 0;"> <span id="LC2214" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkUD</span> <span class="p">{</span></span>
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2074
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2215
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<pre style="margin: 0;"> <span id="LC2215" class="line" lang="haskell"> <span class="n" style="color: #333;">ud_binds</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Bag</span> <span class="kt" style="color: #458; font-weight: 600;">DictBind</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">@@ -2138,8 +2279,6 @@ data CallInfoSet = CIS Id (Bag CallInfo)</td>
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2138
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2279
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<pre style="margin: 0;"> <span id="LC2279" class="line" lang="haskell"></span>
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2139
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2280
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<pre style="margin: 0;"> <span id="LC2280" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">CallInfo</span></span>
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2140
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2281
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<pre style="margin: 0;"> <span id="LC2281" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">CI</span> <span class="p">{</span> <span class="n" style="color: #333;">ci_key</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">SpecArg</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- All arguments</span></span>
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2141
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<pre style="margin: 0;">-<span id="LC2141" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ci_arity</span> <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;">-- The number of variables necessary to bind</span></span>
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2142
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<pre style="margin: 0;">-<span id="LC2142" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- all of the specialised arguments</span></span>
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2143
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2282
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<pre style="margin: 0;"> <span id="LC2282" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ci_fvs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="c1" style="color: #998; font-style: italic;">-- Free vars of the ci_key</span></span>
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2283
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<pre style="margin: 0;"> <span id="LC2283" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- call (including tyvars)</span></span>
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2284
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<pre style="margin: 0;"> <span id="LC2284" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- [*not* include the main id itself, of course]</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">@@ -2185,12 +2324,6 @@ callInfoFVs :: CallInfoSet -> VarSet</td>
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2185
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2324
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<pre style="margin: 0;"> <span id="LC2324" class="line" lang="haskell"><span class="n" style="color: #333;">callInfoFVs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CIS</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">call_info</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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2186
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2325
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<pre style="margin: 0;"> <span id="LC2325" class="line" lang="haskell"> <span class="n" style="color: #333;">foldr</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CI</span> <span class="p">{</span> <span class="n" style="color: #333;">ci_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fv</span> <span class="p">})</span> <span class="n" style="color: #333;">vs</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unionVarSet</span> <span class="n" style="color: #333;">fv</span> <span class="n" style="color: #333;">vs</span><span class="p">)</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">call_info</span></span>
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2187
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2326
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<pre style="margin: 0;"> <span id="LC2326" class="line" lang="haskell"></span>
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2188
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<pre style="margin: 0;">-<span id="LC2188" class="line" lang="haskell"><span class="n" style="color: #333;">computeArity</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">SpecArg</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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2189
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<pre style="margin: 0;">-<span id="LC2189" class="line" lang="haskell"><span class="n" style="color: #333;">computeArity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">length</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">filter</span> <span class="n" style="color: #333;">isValueArg</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">dropWhileEndLE</span> <span class="n" style="color: #333;">isUnspecArg</span></span>
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2190
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<pre style="margin: 0;">-<span id="LC2190" class="line" lang="haskell"></span>
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2191
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<pre style="margin: 0;">-<span id="LC2191" class="line" lang="haskell"><span class="n" style="color: #333;">callSpecArity</span> <span class="o" style="font-weight: 600;">::</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="kt" style="color: #458; font-weight: 600;">Int</span></span>
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2192
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<pre style="margin: 0;">-<span id="LC2192" class="line" lang="haskell"><span class="n" style="color: #333;">callSpecArity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">length</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">filter</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">isNamedBinder</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">dropWhileEndLE</span> <span class="n" style="color: #333;">isVisibleBinder</span></span>
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2193
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<pre style="margin: 0;">-<span id="LC2193" class="line" lang="haskell"></span>
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2194
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2327
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<pre style="margin: 0;"> <span id="LC2327" class="line" lang="haskell"><span class="n" style="color: #333;">getTheta</span> <span class="o" style="font-weight: 600;">::</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 class="kt" style="color: #458; font-weight: 600;">PredType</span><span class="p">]</span></span>
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2195
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2328
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<pre style="margin: 0;"> <span id="LC2328" class="line" lang="haskell"><span class="n" style="color: #333;">getTheta</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">tyBinderType</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">filter</span> <span class="n" style="color: #333;">isInvisibleBinder</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">filter</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">isNamedBinder</span><span class="p">)</span></span>
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2329
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<pre style="margin: 0;"> <span id="LC2329" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2334" 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">@@ -2201,13 +2334,9 @@ singleCall id args</td>
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2201
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2334
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<pre style="margin: 0;"> <span id="LC2334" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</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;">emptyBag</span><span class="p">,</span></span>
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2202
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2335
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<pre style="margin: 0;"> <span id="LC2335" class="line" lang="haskell"> <span class="n" style="color: #333;">ud_calls</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unitDVarEnv</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">CIS</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;">$</span></span>
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2203
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2336
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<pre style="margin: 0;"> <span id="LC2336" class="line" lang="haskell"> <span class="n" style="color: #333;">unitBag</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CI</span> <span class="p">{</span> <span class="n" style="color: #333;">ci_key</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">args</span> <span class="c1" style="color: #998; font-style: italic;">-- used to be tys</span></span>
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2204
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<pre style="margin: 0;">-<span id="LC2204" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ci_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">computeArity</span> <span class="n" style="color: #333;">args</span></span>
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2205
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<pre style="margin: 0;"> <span id="LC2337" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ci_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">call_fvs</span> <span class="p">})</span> <span class="p">}</span></span>
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2206
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2338
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<pre style="margin: 0;"> <span id="LC2338" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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2207
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<pre style="margin: 0;">-<span id="LC2207" class="line" lang="haskell"> <span class="n" style="color: #333;">tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getSpecTypes</span> <span class="n" style="color: #333;">args</span></span>
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2208
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<pre style="margin: 0;">-<span id="LC2208" class="line" lang="haskell"> <span class="n" style="color: #333;">dicts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getSpecDicts</span> <span class="n" style="color: #333;">args</span></span>
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2209
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<pre style="margin: 0;">-<span id="LC2209" class="line" lang="haskell"> <span class="n" style="color: #333;">call_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprsFreeVars</span> <span class="n" style="color: #333;">dicts</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">tys_fvs</span></span>
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2210
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<pre style="margin: 0;">-<span id="LC2210" class="line" lang="haskell"> <span class="n" style="color: #333;">tys_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfTypes</span> <span class="n" style="color: #333;">tys</span></span>
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2339
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<pre style="margin: 0;">+<span id="LC2339" class="line" lang="haskell"> <span class="n" style="color: #333;">call_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="p">(</span><span class="n" style="color: #333;">unionVarSet</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">specArgFreeVars</span><span class="p">)</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">args</span></span>
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2211
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2340
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<pre style="margin: 0;"> <span id="LC2340" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The type args (tys) are guaranteed to be part of the dictionary</span></span>
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2212
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2341
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<pre style="margin: 0;"> <span id="LC2341" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- types, because they are just the constrained types,</span></span>
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2213
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2342
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<pre style="margin: 0;"> <span id="LC2342" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- and the dictionary is therefore sure to be bound</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">@@ -2226,42 +2355,47 @@ mkCallUDs env f args</td>
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2226
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2355
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<pre style="margin: 0;"> <span id="LC2355" 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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2227
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2356
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<pre style="margin: 0;"> <span id="LC2356" class="line" lang="haskell"></span>
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2228
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<pre style="margin: 0;"> <span id="LC2357" 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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2229
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<pre style="margin: 0;">-<span id="LC2229" 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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2230
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<pre style="margin: 0;">-<span id="LC2230" 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;">theta</span> <span class="c1" style="color: #998; font-style: italic;">-- Not overloaded</span></span>
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2231
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<pre style="margin: 0;">-<span id="LC2231" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyUDs</span></span>
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2232
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<pre style="margin: 0;">-<span id="LC2232" class="line" lang="haskell"></span>
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2233
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<pre style="margin: 0;">-<span id="LC2233" 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;">all</span> <span class="n" style="color: #333;">type_determines_value</span> <span class="n" style="color: #333;">theta</span><span class="p">)</span></span>
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2234
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<pre style="margin: 0;">-<span id="LC2234" 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;">computeArity</span> <span class="n" style="color: #333;">ci_key</span> <span class="o" style="font-weight: 600;"><=</span> <span class="n" style="color: #333;">idArity</span> <span class="n" style="color: #333;">f</span><span class="p">)</span></span>
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2235
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<pre style="margin: 0;">-<span id="LC2235" 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;">length</span> <span class="n" style="color: #333;">dicts</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">theta</span><span class="p">)</span></span>
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2236
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<td class="diff-line-num new_line old" data-linenumber="2358" 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="LC2236" 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;">any</span> <span class="p">(</span><span class="n" style="color: #333;">interestingDict</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">dicts</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Note [Interesting dictionary arguments]</span></span>
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2237
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<pre style="margin: 0;">-<span id="LC2237" 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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2358
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<pre style="margin: 0;">+<span id="LC2358" 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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2359
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<pre style="margin: 0;">+<span id="LC2359" 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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2360
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<pre style="margin: 0;">+<span id="LC2360" 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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2238
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2361
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<pre style="margin: 0;"> <span id="LC2361" 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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2239
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<pre style="margin: 0;">-<span id="LC2239" class="line" lang="haskell"> <span class="n" style="color: #333;">emptyUDs</span><span class="idiff left"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- Not overloaded, or no specialisation wanted</span></span></span>
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2362
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<pre style="margin: 0;">+<span id="LC2362" class="line" lang="haskell"> <span class="n" style="color: #333;">emptyUDs</span></span>
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2240
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2363
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<pre style="margin: 0;"> <span id="LC2363" class="line" lang="haskell"></span>
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2241
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2364
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<pre style="margin: 0;"> <span id="LC2364" 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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2242
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2365
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<pre style="margin: 0;"> <span id="LC2365" 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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2243
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2366
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<pre style="margin: 0;"> <span id="LC2366" 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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2244
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2367
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<pre style="margin: 0;"> <span id="LC2367" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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2245
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<pre style="margin: 0;">-<span id="LC2245" 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="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">map</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">interestingDict</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dicts</span></span><span class="p"><span class="idiff right">)</span>]</span></span>
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2368
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<pre style="margin: 0;">+<span id="LC2368" 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;"><span class="idiff left right">ci_key</span></span><span class="p">]</span></span>
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2246
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2369
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<pre style="margin: 0;"> <span id="LC2369" 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;">$</span> <span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">f</span></span>
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2247
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<pre style="margin: 0;">-<span id="LC2247" class="line" lang="haskell"> <span class="n" style="color: #333;">theta</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getTheta</span> <span class="n" style="color: #333;">pis</span></span>
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2248
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<pre style="margin: 0;">-<span id="LC2248" class="line" lang="haskell"> <span class="n" style="color: #333;">constrained_tyvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfTypes</span> <span class="n" style="color: #333;">theta</span></span>
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2370
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<pre style="margin: 0;">+<span id="LC2370" class="line" lang="haskell"> <span class="n" style="color: #333;">constrained_tyvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfTypes</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">getTheta</span> <span class="n" style="color: #333;">pis</span></span>
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2249
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2371
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<pre style="margin: 0;"> <span id="LC2371" class="line" lang="haskell"></span>
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2250
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2372
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<pre style="margin: 0;"> <span id="LC2372" class="line" lang="haskell"> <span class="n" style="color: #333;">ci_key</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">SpecArg</span><span class="p">]</span></span>
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2251
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<pre style="margin: 0;">-<span id="LC2251" class="line" lang="haskell"> <span class="n" style="color: #333;">ci_key</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="n" style="color: #333;">t</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>
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<pre style="margin: 0;">-<span id="LC2252" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">t</span> <span class="kr" style="font-weight: 600;">of</span></span>
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2253
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<pre style="margin: 0;">-<span id="LC2253" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Named</span> <span class="p">(</span><span class="n" style="color: #333;">binderVar</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">tyVar</span><span class="p">)</span></span>
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2254
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<pre style="margin: 0;">-<span id="LC2254" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tyVar</span> <span class="p">`</span><span class="n" style="color: #333;">elemVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">constrained_tyvars</span></span>
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2255
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<pre style="margin: 0;">-<span id="LC2255" 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;">a</span> <span class="kr" style="font-weight: 600;">of</span></span>
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2256
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<pre style="margin: 0;">-<span id="LC2256" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Type</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;">SpecType</span> <span class="n" style="color: #333;">ty</span></span>
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2257
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<pre style="margin: 0;">-<span id="LC2257" 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;">pprPanic</span> <span class="s" style="color: #d14;">"ci_key"</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">a</span></span>
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2258
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<pre style="margin: 0;">-<span id="LC2258" 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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2259
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<pre style="margin: 0;">-<span id="LC2259" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UnspecType</span></span>
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2260
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<pre style="margin: 0;">-<span id="LC2260" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Anon</span> <span class="kt" style="color: #458; font-weight: 600;">InvisArg</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;">SpecDict</span> <span class="n" style="color: #333;">a</span></span>
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2261
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<pre style="margin: 0;">-<span id="LC2261" class="line" lang="haskell"> <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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UnspecArg</span></span>
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2262
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<pre style="margin: 0;">-<span id="LC2262" class="line" lang="haskell"> <span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">zip</span> <span class="n" style="color: #333;">pis</span> <span class="n" style="color: #333;">args</span></span>
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2263
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<pre style="margin: 0;">-<span id="LC2263" class="line" lang="haskell"></span>
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2264
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<pre style="margin: 0;">-<span id="LC2264" class="line" lang="haskell"> <span class="n" style="color: #333;">dicts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getSpecDicts</span> <span class="n" style="color: #333;">ci_key</span></span>
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2373
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<pre style="margin: 0;">+<span id="LC2373" class="line" lang="haskell"> <span class="n" style="color: #333;">ci_key</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dropWhileEndLE</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">isSpecDict</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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2374
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<pre style="margin: 0;">+<span id="LC2374" class="line" lang="haskell"> <span class="n" style="color: #333;">zipWith</span> <span class="n" style="color: #333;">mk_spec_arg</span> <span class="n" style="color: #333;">args</span> <span class="n" style="color: #333;">pis</span></span>
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2375
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<pre style="margin: 0;">+<span id="LC2375" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Drop trailing args until we get to a SpecDict</span></span>
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2376
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<pre style="margin: 0;">+<span id="LC2376" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- In this way the RULE has as few args as possible,</span></span>
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2377
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<pre style="margin: 0;">+<span id="LC2377" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- which broadens its applicability, since rules only</span></span>
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2378
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<pre style="margin: 0;">+<span id="LC2378" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- fire when saturated</span></span>
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2379
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<pre style="margin: 0;">+<span id="LC2379" class="line" lang="haskell"></span>
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2380
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<pre style="margin: 0;">+<span id="LC2380" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_spec_arg</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;">TyCoBinder</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SpecArg</span></span>
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<pre style="margin: 0;">+<span id="LC2381" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_spec_arg</span> <span class="n" style="color: #333;">arg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Named</span> <span class="n" style="color: #333;">bndr</span><span class="p">)</span></span>
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2382
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<pre style="margin: 0;">+<span id="LC2382" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">binderVar</span> <span class="n" style="color: #333;">bndr</span> <span class="p">`</span><span class="n" style="color: #333;">elemVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">constrained_tyvars</span></span>
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2383
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<pre style="margin: 0;">+<span id="LC2383" 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;">arg</span> <span class="kr" style="font-weight: 600;">of</span></span>
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2384
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<pre style="margin: 0;">+<span id="LC2384" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Type</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;">SpecType</span> <span class="n" style="color: #333;">ty</span></span>
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2385
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<pre style="margin: 0;">+<span id="LC2385" 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;">pprPanic</span> <span class="s" style="color: #d14;">"ci_key"</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>
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2386
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<pre style="margin: 0;">+<span id="LC2386" 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;">UnspecType</span></span>
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2387
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<pre style="margin: 0;">+<span id="LC2387" class="line" lang="haskell"></span>
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2388
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<pre style="margin: 0;">+<span id="LC2388" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- For "InvisArg", which are the type-class dictionaries,</span></span>
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2389
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<pre style="margin: 0;">+<span id="LC2389" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- we decide on a case by case basis if we want to specialise</span></span>
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2390
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<pre style="margin: 0;">+<span id="LC2390" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- on this argument; if so, SpecDict, if not UnspecArg</span></span>
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2391
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<pre style="margin: 0;">+<span id="LC2391" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_spec_arg</span> <span class="n" style="color: #333;">arg</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;">InvisArg</span> <span class="n" style="color: #333;">pred</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC2392" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">type_determines_value</span> <span class="n" style="color: #333;">pred</span></span>
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<pre style="margin: 0;">+<span id="LC2393" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">interestingDict</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">arg</span> <span class="c1" style="color: #998; font-style: italic;">-- Note [Interesting dictionary arguments]</span></span>
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<pre style="margin: 0;">+<span id="LC2394" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecDict</span> <span class="n" style="color: #333;">arg</span></span>
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<pre style="margin: 0;">+<span id="LC2395" 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;">UnspecArg</span></span>
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2396
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<pre style="margin: 0;">+<span id="LC2396" class="line" lang="haskell"></span>
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2397
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<pre style="margin: 0;">+<span id="LC2397" 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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2398
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<pre style="margin: 0;">+<span id="LC2398" 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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2265
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2399
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<pre style="margin: 0;"> <span id="LC2399" class="line" lang="haskell"></span>
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2266
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2400
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<pre style="margin: 0;"> <span id="LC2400" 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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2267
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2401
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<pre style="margin: 0;"> <span id="LC2401" 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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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2281,12 +2415,18 @@ mkCallUDs' env f args</td>
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<pre style="margin: 0;"> <span id="LC2415" 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="LC2416" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Type determines value]</span></span>
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2417
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<pre style="margin: 0;"> <span id="LC2417" 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="LC2284" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Only specialise if all overloading is on non-IP *class* params,</span></span>
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<pre style="margin: 0;">-<span id="LC2285" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">because these are the ones whose *type* determines their *value*. In</span></span>
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<pre style="margin: 0;">-<span id="LC2286" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">parrticular, with implicit params, the type args *don't* say what the</span></span>
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2287
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<pre style="margin: 0;">-<span id="LC2287" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">value of the implicit param is! See #7101</span></span>
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<pre style="margin: 0;">-<span id="LC2288" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2289" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">However, consider</span></span>
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<pre style="margin: 0;">+<span id="LC2418" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Only specialise on non-IP *class* params, because these are the ones</span></span>
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<pre style="margin: 0;">+<span id="LC2419" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">whose *type* determines their *value*. In particular, with implicit</span></span>
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<pre style="margin: 0;">+<span id="LC2420" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">params, the type args *don't* say what the value of the implicit param</span></span>
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<pre style="margin: 0;">+<span id="LC2421" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is! See #7101.</span></span>
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<pre style="margin: 0;">+<span id="LC2422" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC2423" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So we treat implicit params just like ordinary arguments for the</span></span>
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2424
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<pre style="margin: 0;">+<span id="LC2424" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">purposes of specialisation. Note that we still want to specialise</span></span>
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2425
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<pre style="margin: 0;">+<span id="LC2425" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">functions with implicit params if they have *other* dicts which are</span></span>
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<pre style="margin: 0;">+<span id="LC2426" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">class params; see #17930.</span></span>
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2427
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<pre style="margin: 0;">+<span id="LC2427" class="line" lang="haskell"></span>
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2428
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<pre style="margin: 0;">+<span id="LC2428" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">One apparent additional complexity involves type families. For</span></span>
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2429
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<pre style="margin: 0;">+<span id="LC2429" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">example, consider</span></span>
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2290
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<pre style="margin: 0;"> <span id="LC2430" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> type family D (v::*->*) :: Constraint</span></span>
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2291
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2431
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<pre style="margin: 0;"> <span id="LC2431" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> type instance D [] = ()</span></span>
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2292
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2432
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<pre style="margin: 0;"> <span id="LC2432" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f :: D v => v Char -> Int</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2437" 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">@@ -2297,8 +2437,7 @@ and it's good to specialise f at this dictionary.</td>
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<pre style="margin: 0;"> <span id="LC2437" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So the question is: can an implicit parameter "hide inside" a</span></span>
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<pre style="margin: 0;"> <span id="LC2438" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">type-family constraint like (D a). Well, no. We don't allow</span></span>
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<pre style="margin: 0;"> <span id="LC2439" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> type instance D Maybe = ?x:Int</span></span>
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<pre style="margin: 0;">-<span id="LC2300" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Hence the IrredPred case in type_determines_value.</span></span>
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<pre style="margin: 0;">-<span id="LC2301" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">See #7785.</span></span>
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<pre style="margin: 0;">+<span id="LC2440" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Hence the IrredPred case in type_determines_value. See #7785.</span></span>
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<pre style="margin: 0;"> <span id="LC2441" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2442" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Interesting dictionary arguments]</span></span>
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<pre style="margin: 0;"> <span id="LC2443" 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">@@ -2591,20 +2730,20 @@ mapAndCombineSM f (x:xs) = do (y, uds1) <- f x</td>
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<pre style="margin: 0;"> <span id="LC2730" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2731" class="line" lang="haskell"><span class="n" style="color: #333;">extendTvSubstList</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="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">)]</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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2732
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<pre style="margin: 0;"> <span id="LC2732" class="line" lang="haskell"><span class="n" style="color: #333;">extendTvSubstList</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">tv_binds</span></span>
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<pre style="margin: 0;">-<span id="LC2594" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</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;"><span class="idiff left">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">extendTvSubstList</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">tv_binds</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC2733" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</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;"><span class="idiff left right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">extendTvSubstList</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">tv_binds</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC2734" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2735" class="line" lang="haskell"><span class="n" style="color: #333;">substTy</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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<pre style="margin: 0;">-<span id="LC2597" class="line" lang="haskell"><span class="n" style="color: #333;">substTy</span> <span class="n" style="color: #333;">env</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;"><span class="idiff left">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substTy</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">+<span id="LC2736" class="line" lang="haskell"><span class="n" style="color: #333;">substTy</span> <span class="n" style="color: #333;">env</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;"><span class="idiff left right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substTy</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;"> <span id="LC2737" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2738" class="line" lang="haskell"><span class="n" style="color: #333;">substCo</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;">Coercion</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="LC2600" class="line" lang="haskell"><span class="n" style="color: #333;">substCo</span> <span class="n" style="color: #333;">env</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">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substCo</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">co</span></span>
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<pre style="margin: 0;">+<span id="LC2739" class="line" lang="haskell"><span class="n" style="color: #333;">substCo</span> <span class="n" style="color: #333;">env</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">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substCo</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">co</span></span>
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2740
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<pre style="margin: 0;"> <span id="LC2740" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2741" class="line" lang="haskell"><span class="n" style="color: #333;">substBndr</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;">CoreBndr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SpecEnv</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">CoreBndr</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC2603" class="line" lang="haskell"><span class="n" style="color: #333;">substBndr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substBndr</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">bs</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC2742" class="line" lang="haskell"><span class="n" style="color: #333;">substBndr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substBndr</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">bs</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC2743" 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;">bs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">env</span> <span class="p">{</span> <span class="n" style="color: #333;">se_subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">subst'</span> <span class="p">},</span> <span class="n" style="color: #333;">bs'</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC2744" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2745" class="line" lang="haskell"><span class="n" style="color: #333;">substBndrs</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBndr</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;">SpecEnv</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBndr</span><span class="p">])</span></span>
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<pre style="margin: 0;">-<span id="LC2607" class="line" lang="haskell"><span class="n" style="color: #333;">substBndrs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substBndrs</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">bs</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC2746" class="line" lang="haskell"><span class="n" style="color: #333;">substBndrs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">substBndrs</span> <span class="p">(</span><span class="n" style="color: #333;">se_subst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">bs</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC2747" 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;">bs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">env</span> <span class="p">{</span> <span class="n" style="color: #333;">se_subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">subst'</span> <span class="p">},</span> <span class="n" style="color: #333;">bs'</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC2748" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2749" class="line" lang="haskell"><span class="n" style="color: #333;">cloneBindSM</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;">CoreBind</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;">SpecEnv</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">SpecEnv</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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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2612,7 +2751,7 @@ cloneBindSM :: SpecEnv -> CoreBind -> SpecM (SpecEnv, SpecEnv, CoreBind)</td>
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2751
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<pre style="margin: 0;"> <span id="LC2751" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Return the substitution to use for RHSs, and the one to use for the body</span></span>
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2752
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<pre style="margin: 0;"> <span id="LC2752" class="line" lang="haskell"><span class="n" style="color: #333;">cloneBindSM</span> <span class="n" style="color: #333;">env</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</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="n" style="color: #333;">subst</span><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;">interesting</span> <span class="p">})</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">bndr</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span></span>
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2614
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2753
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<pre style="margin: 0;"> <span id="LC2753" 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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<td class="diff-line-num old old_line" data-linenumber="2615" 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">
2615
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<td class="diff-line-num new_line old" data-linenumber="2754" 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="LC2615" 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;">bndr'</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">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">cloneIdBndr</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">us</span> <span class="n" style="color: #333;">bndr</span></span>
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2754
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<pre style="margin: 0;">+<span id="LC2754" 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;">bndr'</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 right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">cloneIdBndr</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">us</span> <span class="n" style="color: #333;">bndr</span></span>
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2616
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2755
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<pre style="margin: 0;"> <span id="LC2755" class="line" lang="haskell"> <span class="n" style="color: #333;">interesting'</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">interestingDict</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">rhs</span></span>
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<td class="diff-line-num old_line" data-linenumber="2617" 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">
2617
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2756
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<pre style="margin: 0;"> <span id="LC2756" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">interesting</span> <span class="p">`</span><span class="n" style="color: #333;">extendVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">bndr'</span></span>
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<td class="diff-line-num old_line" data-linenumber="2618" 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">
2618
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2757
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<pre style="margin: 0;"> <span id="LC2757" 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;">interesting</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2621" 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="2760" 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">@@ -2621,7 +2760,7 @@ cloneBindSM env@(SE { se_subst = subst, se_interesting = interesting }) (NonRec</td>
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2621
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2760
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<pre style="margin: 0;"> <span id="LC2760" class="line" lang="haskell"></span>
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2622
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2761
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<pre style="margin: 0;"> <span id="LC2761" class="line" lang="haskell"><span class="n" style="color: #333;">cloneBindSM</span> <span class="n" style="color: #333;">env</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</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="n" style="color: #333;">subst</span><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;">interesting</span> <span class="p">})</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Rec</span> <span class="n" style="color: #333;">pairs</span><span class="p">)</span></span>
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2623
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2762
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<pre style="margin: 0;"> <span id="LC2762" 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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2624
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<pre style="margin: 0;">-<span id="LC2624" 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;">bndrs'</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">GHC</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Core</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Subst</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">cloneRecIdBndrs</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">us</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">pairs</span><span class="p">)</span></span>
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<td class="diff-line-num new old_line" data-linenumber="2625" 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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2763
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<pre style="margin: 0;">+<span id="LC2763" 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;">bndrs'</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 right">Core</span></span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">cloneRecIdBndrs</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">us</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">pairs</span><span class="p">)</span></span>
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2625
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2764
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<pre style="margin: 0;"> <span id="LC2764" class="line" lang="haskell"> <span class="n" style="color: #333;">env'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</span> <span class="p">{</span> <span class="n" style="color: #333;">se_subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">subst'</span></span>
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<td class="diff-line-num old_line" data-linenumber="2626" 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">
2626
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2765
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<pre style="margin: 0;"> <span id="LC2765" 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;">interesting</span> <span class="p">`</span><span class="n" style="color: #333;">extendVarSetList</span><span class="p">`</span></span>
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2627
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2766
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<pre style="margin: 0;"> <span id="LC2766" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">v</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;">pairs</span><span class="p">,</span> <span class="n" style="color: #333;">interestingDict</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">r</span> <span class="p">]</span> <span class="p">}</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2631" 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="2770" 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">@@ -2631,9 +2770,9 @@ newDictBndr :: SpecEnv -> CoreBndr -> SpecM CoreBndr</td>
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2631
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2770
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<pre style="margin: 0;"> <span id="LC2770" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Make up completely fresh binders for the dictionaries</span></span>
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2632
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2771
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<pre style="margin: 0;"> <span id="LC2771" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Their bindings are going to float outwards</span></span>
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2772
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<pre style="margin: 0;"> <span id="LC2772" class="line" lang="haskell"><span class="n" style="color: #333;">newDictBndr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">b</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;">uniq</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getUniqueM</span></span>
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2634
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<pre style="margin: 0;">-<span id="LC2634" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">b</span></span>
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2635
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<pre style="margin: 0;">-<span id="LC2635" 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;">substTy</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">b</span><span class="p">)</span></span>
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2636
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<pre style="margin: 0;">-<span id="LC2636" 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;">mkUserLocal</span> <span class="p">(</span><span class="n" style="color: #333;">nameOccName</span> <span class="n" style="color: #333;">n</span><span class="p">)</span> <span class="n" style="color: #333;">uniq</span> <span class="n" style="color: #333;">ty'</span> <span class="p">(</span><span class="n" style="color: #333;">getSrcSpan</span> <span class="n" style="color: #333;">n</span><span class="p">))</span> <span class="p">}</span></span>
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2773
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<pre style="margin: 0;">+<span id="LC2773" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">b</span></span>
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2774
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<pre style="margin: 0;">+<span id="LC2774" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="n" style="color: #333;">ty'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">b</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC2775" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkUserLocal</span> <span class="p">(</span><span class="n" style="color: #333;">nameOccName</span> <span class="n" style="color: #333;">n</span><span class="p">)</span> <span class="n" style="color: #333;">uniq</span> <span class="n" style="color: #333;">ty'</span> <span class="p">(</span><span class="n" style="color: #333;">getSrcSpan</span> <span class="n" style="color: #333;">n</span><span class="p">))</span> <span class="p">}</span></span>
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2776
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<pre style="margin: 0;"> <span id="LC2776" class="line" lang="haskell"></span>
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2638
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2777
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<pre style="margin: 0;"> <span id="LC2777" class="line" lang="haskell"><span class="n" style="color: #333;">newSpecIdSM</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;">Type</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;">JoinArity</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SpecM</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span></span>
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2778
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<pre style="margin: 0;"> <span id="LC2778" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Give the new Id a similar occurrence name to the old one</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#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">@@ -17,7 +17,7 @@ module GHC.Core.Subst (</td>
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">deShadowBinds</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substSpec</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substRulesForImportedIds</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">substTy</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;">substExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substExprSC</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substBind</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substBindSC</span><span class="p">,</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;">substUnfolding</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substUnfoldingSC</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC20" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">lookupIdSubst</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lookupTCvSubst</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substIdOcc</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">lookupIdSubst</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lookupTCvSubst</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substId<span class="idiff left">Type</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">substId</span>Occ</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">substTickish</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substIdInfo</span><span class="p">,</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="c1" style="color: #998; font-style: italic;">-- ** Operations on substitutions</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">@@ -756,4 +756,3 @@ analyser, so it's possible that the worker is not even in scope any more.</td>
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<pre style="margin: 0;"> <span id="LC756" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In all all these cases we simply drop the special case, returning to</span></span>
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<pre style="margin: 0;"> <span id="LC757" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">InlVanilla. The WARN is just so I can see if it happens a lot.</span></span>
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<pre style="margin: 0;"> <span id="LC758" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span></pre>
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<pre style="margin: 0;">-<span id="LC759" class="line" lang="haskell"></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#2811a7297b8aa206197ac1f5dabd0818e3c7ec5a"><strong>compiler/GHC/Core/Unfold.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">@@ -173,15 +173,16 @@ mkInlinableUnfolding dflags expr</td>
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<pre style="margin: 0;"> <span id="LC173" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC174" class="line" lang="haskell"> <span class="n" style="color: #333;">expr'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">simpleOptExpr</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">expr</span></span>
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<pre style="margin: 0;"> <span id="LC175" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC176" class="line" lang="haskell"><span class="n" style="color: #333;">specUnfolding</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="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="p">(</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 class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Arity</span></span>
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<pre style="margin: 0;">+<span id="LC176" class="line" lang="haskell"><span class="n" style="color: #333;">specUnfolding</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;"><span class="idiff left">Id</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="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="p">(</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 class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Arity</span></span>
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<pre style="margin: 0;"> <span id="LC177" class="line" lang="haskell"> <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="LC178" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Specialising unfoldings]</span></span>
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<pre style="margin: 0;"> <span id="LC179" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- specUnfolding spec_bndrs spec_app arity_decrease unf</span></span>
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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- = \spec_bndrs. spec_app( unf )</span></span>
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<pre style="margin: 0;"> <span id="LC181" 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="LC182" class="line" lang="haskell"><span class="n" style="color: #333;">specUnfolding</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">spec_bndrs</span> <span class="n" style="color: #333;">spec_app</span> <span class="n" style="color: #333;">arity_decrease</span></span>
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<pre style="margin: 0;">+<span id="LC182" class="line" lang="haskell"><span class="n" style="color: #333;">specUnfolding</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;"><span class="idiff left">fn</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">spec_bndrs</span> <span class="n" style="color: #333;">spec_app</span> <span class="n" style="color: #333;">arity_decrease</span></span>
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<pre style="margin: 0;"> <span id="LC183" class="line" lang="haskell"> <span class="n" style="color: #333;">df</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DFunUnfolding</span> <span class="p">{</span> <span class="n" style="color: #333;">df_bndrs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">old_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">df_con</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">con</span><span class="p">,</span> <span class="n" style="color: #333;">df_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">args</span> <span class="p">})</span></span>
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<pre style="margin: 0;">-<span id="LC184" 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;">arity_decrease</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">count</span> <span class="n" style="color: #333;">isId</span> <span class="n" style="color: #333;">old_bndrs</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">count</span> <span class="n" style="color: #333;">isId</span> <span class="n" style="color: #333;">spec_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">df</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC184" 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;">arity_decrease</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">count</span> <span class="n" style="color: #333;">isId</span> <span class="n" style="color: #333;">old_bndrs</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">count</span> <span class="n" style="color: #333;">isId</span> <span class="n" style="color: #333;">spec_bndrs</span></span>
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185
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<pre style="margin: 0;">+<span id="LC185" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">df</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">spec_bndrs</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">spec_app</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">fn</span><span class="p">))</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arity_decrease</span> <span class="p">)</span></span>
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185
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186
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<pre style="margin: 0;"> <span id="LC186" class="line" lang="haskell"> <span class="n" style="color: #333;">mkDFunUnfolding</span> <span class="n" style="color: #333;">spec_bndrs</span> <span class="n" style="color: #333;">con</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">spec_arg</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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186
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187
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<pre style="margin: 0;"> <span id="LC187" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- There is a hard-to-check assumption here that the spec_app has</span></span>
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187
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188
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<pre style="margin: 0;"> <span id="LC188" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- enough applications to exactly saturate the old_bndrs</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="195" 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">@@ -195,7 +196,7 @@ specUnfolding dflags spec_bndrs spec_app arity_decrease</td>
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195
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196
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<pre style="margin: 0;"> <span id="LC196" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The beta-redexes created by spec_app will be</span></span>
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196
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197
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<pre style="margin: 0;"> <span id="LC197" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- simplified away by simplOptExpr</span></span>
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197
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198
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<pre style="margin: 0;"> <span id="LC198" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC198" class="line" lang="haskell"><span class="n" style="color: #333;">specUnfolding</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">spec_bndrs</span> <span class="n" style="color: #333;">spec_app</span> <span class="n" style="color: #333;">arity_decrease</span></span>
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199
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<pre style="margin: 0;">+<span id="LC199" class="line" lang="haskell"><span class="n" style="color: #333;">specUnfolding</span> <span class="n" style="color: #333;">dflags</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">_</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">spec_bndrs</span> <span class="n" style="color: #333;">spec_app</span> <span class="n" style="color: #333;">arity_decrease</span></span>
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199
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200
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<pre style="margin: 0;"> <span id="LC200" class="line" lang="haskell"> <span class="p">(</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;">tmpl</span></span>
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200
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201
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<pre style="margin: 0;"> <span id="LC201" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">uf_is_top</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">top_lvl</span></span>
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<pre style="margin: 0;"> <span id="LC202" class="line" lang="haskell"> <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;">old_guidance</span> <span class="p">})</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="212" 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">@@ -212,7 +213,7 @@ specUnfolding dflags spec_bndrs spec_app arity_decrease</td>
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212
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213
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<pre style="margin: 0;"> <span id="LC213" class="line" lang="haskell"></span>
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213
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<pre style="margin: 0;"> <span id="LC214" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="n" style="color: #333;">mkCoreUnfolding</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">top_lvl</span> <span class="n" style="color: #333;">new_tmpl</span> <span class="n" style="color: #333;">guidance</span></span>
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<pre style="margin: 0;"> <span id="LC215" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC215" class="line" lang="haskell"><span class="n" style="color: #333;">specUnfolding</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noUnfolding</span></span>
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<pre style="margin: 0;">+<span id="LC216" class="line" lang="haskell"><span class="n" style="color: #333;">specUnfolding</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">_</span></span><span class="idiff right"> </span><span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noUnfolding</span></span>
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<pre style="margin: 0;"> <span id="LC217" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC218" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Specialising unfoldings]</span></span>
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218
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<pre style="margin: 0;"> <span id="LC219" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#65e2067fbb7377818b6cadff0531f44029499948"><strong>compiler/GHC/HsToCore/Binds.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">@@ -701,7 +701,7 @@ dsSpec mb_poly_rhs (L loc (SpecPrag poly_id spec_co spec_inl))</td>
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701
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<pre style="margin: 0;"> <span id="LC701" class="line" lang="haskell"></span>
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702
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<pre style="margin: 0;"> <span id="LC702" 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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703
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703
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<pre style="margin: 0;"> <span id="LC703" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">fn_unf</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">realIdUnfolding</span> <span class="n" style="color: #333;">poly_id</span></span>
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<pre style="margin: 0;">-<span id="LC704" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_unf</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">specUnfolding</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">spec_bndrs</span> <span class="n" style="color: #333;">core_app</span> <span class="n" style="color: #333;">arity_decrease</span> <span class="n" style="color: #333;">fn_unf</span></span>
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<pre style="margin: 0;">+<span id="LC704" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_unf</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">specUnfolding</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;"><span class="idiff left">poly_id</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">spec_bndrs</span> <span class="n" style="color: #333;">core_app</span> <span class="n" style="color: #333;">arity_decrease</span> <span class="n" style="color: #333;">fn_unf</span></span>
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705
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<pre style="margin: 0;"> <span id="LC705" class="line" lang="haskell"> <span class="n" style="color: #333;">spec_id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkLocalId</span> <span class="n" style="color: #333;">spec_name</span> <span class="n" style="color: #333;">spec_ty</span></span>
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<pre style="margin: 0;"> <span id="LC706" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">setInlinePragma</span><span class="p">`</span> <span class="n" style="color: #333;">inl_prag</span></span>
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<pre style="margin: 0;"> <span id="LC707" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">setIdUnfolding</span><span class="p">`</span> <span class="n" style="color: #333;">spec_unf</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#b788976ba3555853d385fd1c6246444c972d749f"><strong>testsuite/tests/perf/compiler/T16473.stdout</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">@@ -92,6 +92,12 @@ Rule fired: Class op $p1Monad (BUILTIN)</td>
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<pre style="margin: 0;"> <span id="LC92" class="line" lang="plaintext">Rule fired: Class op $p1Applicative (BUILTIN)</span>
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<pre style="margin: 0;"> <span id="LC93" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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<pre style="margin: 0;"> <span id="LC94" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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<pre style="margin: 0;">+<span id="LC95" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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<pre style="margin: 0;">+<span id="LC96" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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<pre style="margin: 0;">+<span id="LC97" class="line" lang="plaintext">Rule fired: SPEC/Main $fFunctorStateT_$cfmap @Identity _ (Main)</span>
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<pre style="margin: 0;">+<span id="LC98" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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<pre style="margin: 0;">+<span id="LC99" class="line" lang="plaintext">Rule fired: SPEC/Main $fFunctorStateT_$cfmap @Identity _ (Main)</span>
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<pre style="margin: 0;">+<span id="LC100" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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<pre style="margin: 0;"> <span id="LC101" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
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102
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<pre style="margin: 0;"> <span id="LC102" class="line" lang="plaintext">Rule fired: Class op return (BUILTIN)</span>
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97
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<td class="diff-line-num new_line" data-linenumber="103" 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">
103
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<pre style="margin: 0;"> <span id="LC103" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="117" 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="123" 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">@@ -117,18 +123,19 @@ Rule fired: SPEC/Main $fApplicativeStateT_$c<*> @Identity _ (Main)</td>
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117
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123
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<pre style="margin: 0;"> <span id="LC123" class="line" lang="plaintext">Rule fired: SPEC/Main $fApplicativeStateT_$c*> @Identity _ (Main)</span>
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<td class="diff-line-num old_line" data-linenumber="118" 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">
118
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124
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<pre style="margin: 0;"> <span id="LC124" class="line" lang="plaintext">Rule fired: SPEC/Main $fMonadStateT @Identity _ (Main)</span>
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119
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125
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<pre style="margin: 0;"> <span id="LC125" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
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126
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<pre style="margin: 0;">+<span id="LC126" class="line" lang="plaintext">Rule fired: Class op $p1Applicative (BUILTIN)</span>
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<td class="diff-line-num new new_line" data-linenumber="127" 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">
127
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<pre style="margin: 0;">+<span id="LC127" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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128
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<pre style="margin: 0;">+<span id="LC128" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
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120
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129
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<pre style="margin: 0;"> <span id="LC129" class="line" lang="plaintext">Rule fired: Class op <*> (BUILTIN)</span>
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121
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130
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<pre style="margin: 0;"> <span id="LC130" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
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122
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131
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<pre style="margin: 0;"> <span id="LC131" class="line" lang="plaintext">Rule fired: Class op $p1Applicative (BUILTIN)</span>
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<td class="diff-line-num old_line" data-linenumber="123" 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">
123
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132
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<pre style="margin: 0;"> <span id="LC132" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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124
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<pre style="margin: 0;">-<span id="LC124" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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125
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133
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<pre style="margin: 0;"> <span id="LC133" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
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126
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134
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<pre style="margin: 0;"> <span id="LC134" class="line" lang="plaintext">Rule fired: Class op <*> (BUILTIN)</span>
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127
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135
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<pre style="margin: 0;"> <span id="LC135" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
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128
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136
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<pre style="margin: 0;"> <span id="LC136" class="line" lang="plaintext">Rule fired: Class op $p1Applicative (BUILTIN)</span>
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129
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137
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<pre style="margin: 0;"> <span id="LC137" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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130
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138
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<pre style="margin: 0;"> <span id="LC138" class="line" lang="plaintext">Rule fired: Class op >>= (BUILTIN)</span>
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131
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<pre style="margin: 0;">-<span id="LC131" class="line" lang="plaintext">Rule fired: Class op fmap (BUILTIN)</span>
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132
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139
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<pre style="margin: 0;"> <span id="LC139" class="line" lang="plaintext">Rule fired: SPEC go @(StateT (Sum Int) Identity) (Main)</span>
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133
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140
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<pre style="margin: 0;"> <span id="LC140" class="line" lang="plaintext">Rule fired: Class op $p1Monad (BUILTIN)</span>
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134
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141
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<pre style="margin: 0;"> <span id="LC141" class="line" lang="plaintext">Rule fired: Class op pure (BUILTIN)</span>
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<li id="11ca6c36a465280185664c54bed1de3cf206b723">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#11ca6c36a465280185664c54bed1de3cf206b723"><strong>testsuite/tests/simplCore/should_compile/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">@@ -2,6 +2,11 @@ TOP=../../..</td>
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2
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2
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<pre style="margin: 0;"> <span id="LC2" class="line" lang="make"><span class="k" style="font-weight: 600;">include</span><span class="sx" style="color: #d14;"> $(TOP)/mk/boilerplate.mk</span></span>
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3
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="make"><span class="k" style="font-weight: 600;">include</span><span class="sx" style="color: #d14;"> $(TOP)/mk/test.mk</span></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="make"></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="make"><span class="nl">T17966</span><span class="o" style="font-weight: 600;">:</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="make"> <span class="nv" style="color: #008080;">$(RM)</span> <span class="nt" style="color: #000080;">-f</span> T17966.o T17966.hi</span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="make"> <span class="p">-</span> <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;">-O</span> <span class="nt" style="color: #000080;">-c</span> <span class="nt" style="color: #000080;">-ddump-spec</span> T17966.hs 2> /dev/null | <span class="nb" style="color: #0086b3;">grep</span> <span class="s1" style="color: #d14;">'SPEC'</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="make"> <span class="c" style="color: #998; font-style: italic;"># Expecting a SPEC rule for $cm</span></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="make"></span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="make"><span class="nl">T17409</span><span class="o" style="font-weight: 600;">:</span></span>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="make"> <span class="nv" style="color: #008080;">$(RM)</span> <span class="nt" style="color: #000080;">-f</span> T17409.o T17409.hi</span>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="make"> <span class="p">-</span> <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;">-O</span> <span class="nt" style="color: #000080;">-c</span> <span class="nt" style="color: #000080;">-dverbose-core2core</span> <span class="nt" style="color: #000080;">-dsuppress-uniques</span> T17409.hs 2> /dev/null | <span class="nb" style="color: #0086b3;">grep</span> <span class="s1" style="color: #d14;">'\<id\>'</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#699a7cef319506d4397c5c89ec1749a67bc44f15"><strong>testsuite/tests/simplCore/should_compile/T17810.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T17801</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad.Except</span></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;">T17810a</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;">f</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ExceptT</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TCMT</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span><span class="p">)</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;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">liftReduce</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#e058b4b1c4c25d98dca9acd8fa1abfc98cad6b76"><strong>testsuite/tests/simplCore/should_compile/T17810a.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T17810a</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad.Except</span></span>
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4
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">class</span> <span class="kt" style="color: #458; font-weight: 600;">Monad</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">ReadTCState</span> <span class="n" style="color: #333;">m</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"> <span class="n" style="color: #333;">locallyTCState</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;">liftReduce</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="LC8" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">ReadTCState</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">ReadTCState</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ExceptT</span> <span class="n" style="color: #333;">err</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"> <span class="n" style="color: #333;">locallyTCState</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">undefined</span></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"> <span class="n" style="color: #333;">liftReduce</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lift</span> <span class="n" style="color: #333;">liftReduce</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">MonadIO</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">ReadTCState</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TCMT</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"> <span class="n" style="color: #333;">locallyTCState</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">undefined</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">liftReduce</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><*</span> <span class="kt" style="color: #458; font-weight: 600;">TCM</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"> <span class="n" style="color: #333;">liftReduce</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">undefined</span></span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">TCMT</span> <span class="n" style="color: #333;">m</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;">TCM</span> <span class="p">{</span> <span class="n" style="color: #333;">unTCM</span> <span class="o" style="font-weight: 600;">::</span> <span class="nb" style="color: #0086b3;">()</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">a</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">MonadIO</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Functor</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TCMT</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TCM</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TCM</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">liftM</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">r</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">MonadIO</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Applicative</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TCMT</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC23" 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;">TCM</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</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 class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;"><*></span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TCM</span> <span class="n" style="color: #333;">mf</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TCM</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TCM</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ap</span> <span class="p">(</span><span class="n" style="color: #333;">mf</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">r</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">MonadIO</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Monad</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TCMT</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;">>>=</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TCM</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TCM</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unTCM</span> <span class="p">(</span><span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">r</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#43c0f6579da9b204cd0428d01583284f3a664318"><strong>testsuite/tests/simplCore/should_compile/T17930.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 ImplicitParams #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T17930</span> <span class="kr" style="font-weight: 600;">where</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="n" style="color: #333;">foo</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;">b</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Show</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=></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;">String</span></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="n" style="color: #333;">foo</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">|</span> <span class="o" style="font-weight: 600;">?</span><span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">show</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">++</span> <span class="s" style="color: #d14;">"!"</span></span>
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<pre style="margin: 0;">+<span id="LC6" 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;">show</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">++</span> <span class="s" style="color: #d14;">"."</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINABLE[0] foo #-}</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="n" style="color: #333;">str</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="n" style="color: #333;">str</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="o" style="font-weight: 600;">?</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;">True</span> <span class="kr" style="font-weight: 600;">in</span> <span class="n" style="color: #333;">foo</span> <span class="s" style="color: #d14;">"Hello"</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#6f10bc7839f7d9c02bcf85ea8c4a1d78c7e24b6b"><strong>testsuite/tests/simplCore/should_compile/T17930.stderr</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext">$sfoo :: (?b::Bool) => [Char] -> [Char]</span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">$sfoo</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#64823618efc680c643e35be19ed0003b17073274"><strong>testsuite/tests/simplCore/should_compile/T17966.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 FlexibleInstances, MultiParamTypeClasses #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The issue here is whether $cm gets a specialiation</span></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See #17966</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="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T17966</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">class</span> <span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Show</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Show</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;">C</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="n" style="color: #333;">b</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">show</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">show</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">show</span> <span class="n" style="color: #333;">c</span></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"> <span class="cp" style="color: #999; font-weight: 600;">{-# INLINABLE [0] m #-}</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Show</span> <span class="n" style="color: #333;">c</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">++</span> <span class="s" style="color: #d14;">"!"</span></span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINABLE [0] f #-}</span></span>
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18
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"></span>
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19
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><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;">String</span></span>
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<pre style="margin: 0;">+<span id="LC20" 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;">f</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="nb" style="color: #0086b3;">()</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="mi" style="color: #099;">42</span><span class="p">)</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#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>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">"SPEC/T17966 $fShowMaybe_$cshowList @Integer"</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">"SPEC/T17966 $fShowMaybe @Integer"</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#fc07c260b75644727a8cdc1af5c861a44d4bfb5e"><strong>testsuite/tests/simplCore/should_compile/all.T</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -319,3 +319,10 @@ test('T17787', [ grep_errmsg(r'foo') ], compile, ['-ddump-simpl -dsuppress-uniq</td>
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<pre style="margin: 0;"> <span id="LC319" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17901</span><span class="p">',</span></span>
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<pre style="margin: 0;"> <span id="LC320" class="line" lang="perl"> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC321" class="line" lang="perl"> <span class="nv" style="color: #008080;">makefile_test</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">T17901</span><span class="p">'])</span></span>
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<pre style="margin: 0;">+<span id="LC322" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17930</span><span class="p">',</span> <span class="p">[</span> <span class="nv" style="color: #008080;">grep_errmsg</span><span class="p">(</span><span class="nv" style="color: #008080;">r</span><span class="p">'</span><span class="s1" style="color: #d14;">^</span><span class="err" style="color: #a61717; background-color: #e3d2d2;">\</span><span class="s1" style="color: #d14;">$sfoo</span><span class="p">')</span> <span class="p">],</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-O -ddump-spec -dsuppress-uniques -dsuppress-idinfo</span><span class="p">'])</span></span>
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<pre style="margin: 0;">+<span id="LC323" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">spec004</span><span class="p">',</span> <span class="p">[</span> <span class="nv" style="color: #008080;">grep_errmsg</span><span class="p">(</span><span class="nv" style="color: #008080;">r</span><span class="p">'</span><span class="err" style="color: #a61717; background-color: #e3d2d2;">\</span><span class="s1" style="color: #d14;">$sfoo</span><span class="p">')</span> <span class="p">],</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-O -ddump-spec -dsuppress-uniques</span><span class="p">'])</span></span>
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<pre style="margin: 0;">+<span id="LC324" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17966</span><span class="p">',</span></span>
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<pre style="margin: 0;">+<span id="LC325" class="line" lang="perl"> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC326" class="line" lang="perl"> <span class="nv" style="color: #008080;">makefile_test</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">T17966</span><span class="p">'])</span></span>
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<pre style="margin: 0;">+<span id="LC327" class="line" lang="perl"><span class="c1" style="color: #998; font-style: italic;"># NB: T17810: -fspecialise-aggressively</span></span>
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<pre style="margin: 0;">+<span id="LC328" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17810</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">multimod_compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">T17810</span><span class="p">',</span> <span class="p">'</span><span class="s1" style="color: #d14;">-fspecialise-aggressively -dcore-lint -O -v0</span><span class="p">'])</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#3474e9ac695d7ceebc16e593e4828f6fd84db3df"><strong>testsuite/tests/simplCore/should_compile/spec004.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 RankNTypes #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Dead arguments should be dropped in specialisations. See !2913.</span></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">ShouldCompile</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="n" style="color: #333;">foo</span> <span class="o" style="font-weight: 600;">::</span> <span class="nb" style="color: #0086b3;">()</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Show</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">=></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;">String</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="n" style="color: #333;">foo</span> <span class="n" style="color: #333;">_x</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">show</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">++</span> <span class="s" style="color: #d14;">"!"</span></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE[0] foo #-}</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">bar</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="n" style="color: #333;">bar</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foo</span> <span class="nb" style="color: #0086b3;">()</span> <span class="p">(</span><span class="mi" style="color: #099;">42</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">)</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4291bddaea3148908c55f235ee8978e1d9aa6f20#c114c4cec1a70bccc37179d5c97b4c7d09c7b975"><strong>testsuite/tests/simplCore/should_compile/spec004.stderr</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">==================== Specialise ====================</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">Result size of Specialise</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext"> = {terms: 53, types: 46, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext">-- RHS size: {terms: 14, types: 12, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext">$sfoo [InlPrag=NOINLINE[0]] :: Int -> [Char]</span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="plaintext">[LclId]</span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="plaintext">$sfoo</span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="plaintext"> = \ (y :: Int) -></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext"> GHC.Base.build</span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="plaintext"> @Char</span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="plaintext"> (\ (@b) (c [OS=OneShot] :: Char -> b -> b) (n [OS=OneShot] :: b) -></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="plaintext"> GHC.Base.foldr</span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="plaintext"> @Char</span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="plaintext"> @b</span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext"> c</span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="plaintext"> (GHC.CString.unpackFoldrCString# @b "!"# c n)</span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="plaintext"> (show @Int GHC.Show.$fShowInt y))</span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="plaintext">-- RHS size: {terms: 17, types: 17, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="plaintext">foo [InlPrag=NOINLINE[0]] :: forall a. () -> Show a => a -> String</span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="plaintext">[LclIdX,</span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="plaintext"> Arity=3,</span>
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<pre style="margin: 0;">+<span id="LC25" 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="LC26" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [0 30 0] 150 40},</span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="plaintext"> RULES: "SPEC foo @Int" [0]</span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="plaintext"> forall (dk :: ()) ($dShow :: Show Int). foo @Int dk $dShow = $sfoo]</span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="plaintext">foo</span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="plaintext"> = \ (@a) _ [Occ=Dead] ($dShow :: Show a) (y :: a) -></span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="plaintext"> GHC.Base.build</span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="plaintext"> @Char</span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="plaintext"> (\ (@b) (c [OS=OneShot] :: Char -> b -> b) (n [OS=OneShot] :: b) -></span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="plaintext"> GHC.Base.foldr</span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="plaintext"> @Char</span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="plaintext"> @b</span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="plaintext"> c</span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="plaintext"> (GHC.CString.unpackFoldrCString# @b "!"# c n)</span>
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="plaintext"> (show @a $dShow y))</span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC41" class="line" lang="plaintext">-- RHS size: {terms: 1, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC42" class="line" lang="plaintext">$trModule :: GHC.Prim.Addr#</span>
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<pre style="margin: 0;">+<span id="LC43" class="line" lang="plaintext">[LclId,</span>
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<pre style="margin: 0;">+<span id="LC44" 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="LC45" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 20 0}]</span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="plaintext">$trModule = "main"#</span>
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<pre style="margin: 0;">+<span id="LC47" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC48" class="line" lang="plaintext">-- RHS size: {terms: 2, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC49" class="line" lang="plaintext">$trModule :: GHC.Types.TrName</span>
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<pre style="margin: 0;">+<span id="LC50" class="line" lang="plaintext">[LclId,</span>
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<pre style="margin: 0;">+<span id="LC51" 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="LC52" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 10 20}]</span>
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<pre style="margin: 0;">+<span id="LC53" class="line" lang="plaintext">$trModule = GHC.Types.TrNameS $trModule</span>
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<pre style="margin: 0;">+<span id="LC54" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC55" class="line" lang="plaintext">-- RHS size: {terms: 1, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC56" class="line" lang="plaintext">$trModule :: GHC.Prim.Addr#</span>
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<pre style="margin: 0;">+<span id="LC57" class="line" lang="plaintext">[LclId,</span>
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<pre style="margin: 0;">+<span id="LC58" 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="LC59" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 50 0}]</span>
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<pre style="margin: 0;">+<span id="LC60" class="line" lang="plaintext">$trModule = "ShouldCompile"#</span>
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<pre style="margin: 0;">+<span id="LC61" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC62" class="line" lang="plaintext">-- RHS size: {terms: 2, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC63" class="line" lang="plaintext">$trModule :: GHC.Types.TrName</span>
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<pre style="margin: 0;">+<span id="LC64" class="line" lang="plaintext">[LclId,</span>
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<pre style="margin: 0;">+<span id="LC65" 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="LC66" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 10 20}]</span>
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<pre style="margin: 0;">+<span id="LC67" class="line" lang="plaintext">$trModule = GHC.Types.TrNameS $trModule</span>
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<pre style="margin: 0;">+<span id="LC68" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC69" class="line" lang="plaintext">-- RHS size: {terms: 3, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC70" class="line" lang="plaintext">ShouldCompile.$trModule :: GHC.Types.Module</span>
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<pre style="margin: 0;">+<span id="LC71" class="line" lang="plaintext">[LclIdX,</span>
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<pre style="margin: 0;">+<span id="LC72" 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="LC73" class="line" lang="plaintext"> WorkFree=True, Expandable=True, Guidance=IF_ARGS [] 10 30}]</span>
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<pre style="margin: 0;">+<span id="LC74" class="line" lang="plaintext">ShouldCompile.$trModule = GHC.Types.Module $trModule $trModule</span>
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<pre style="margin: 0;">+<span id="LC75" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC76" class="line" lang="plaintext">-- RHS size: {terms: 5, types: 1, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC77" class="line" lang="plaintext">bar :: String</span>
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<pre style="margin: 0;">+<span id="LC78" class="line" lang="plaintext">[LclIdX,</span>
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<pre style="margin: 0;">+<span id="LC79" class="line" lang="plaintext"> Unf=Unf{Src=<vanilla>, TopLvl=True, Value=False, ConLike=False,</span>
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<pre style="margin: 0;">+<span id="LC80" class="line" lang="plaintext"> WorkFree=False, Expandable=False, Guidance=IF_ARGS [] 50 0}]</span>
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<pre style="margin: 0;">+<span id="LC81" class="line" lang="plaintext">bar = foo @Int GHC.Tuple.() GHC.Show.$fShowInt (GHC.Types.I# 42#)</span>
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<pre style="margin: 0;">+<span id="LC82" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC83" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC84" class="line" lang="plaintext"></span></pre>
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