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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/10e6982c6117e55b0151dc456e75ebc4798df73f">10e6982c</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-05-28T16:25:14-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">FloatOut: Only eta-expand dead-end RHS if arity will increase (#18231)
Otherwise we risk turning trivial RHS into non-trivial RHS, introducing
unnecessary bindings in the next Simplifier run, resulting in more
churn.
Fixes #18231.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/08dab5f74e021ad054112cc5f6bb7e55d8796cd7">08dab5f7</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-05-28T16:25:14-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">DmdAnal: Recognise precise exceptions from case alternatives (#18086)
Consider
```hs
m :: IO ()
m = do
putStrLn "foo"
error "bar"
```
`m` (from #18086) always throws a (precise or imprecise) exception or
diverges. Yet demand analysis infers `<L,A>` as demand signature instead
of `<L,A>x` for it.
That's because the demand analyser sees `putStrLn` occuring in a case
scrutinee and decides that it has to `deferAfterPreciseException`,
because `putStrLn` throws a precise exception on some control flow
paths. This will mask the `botDiv` `Divergence`of the single case alt
containing `error` to `topDiv`. Since `putStrLn` has `topDiv` itself,
the final `Divergence` is `topDiv`.
This is easily fixed: `deferAfterPreciseException` works by `lub`ing
with the demand type of a virtual case branch denoting the precise
exceptional control flow. We used `nopDmdType` before, but we can be
more precise and use `exnDmdType`, which is `nopDmdType` with `exnDiv`.
Now the `Divergence` from the case alt will degrade `botDiv` to `exnDiv`
instead of `topDiv`, which combines with the result from the scrutinee
to `exnDiv`, and all is well.
Fixes #18086.
</pre>
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<h4>9 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#0debbb6150cac3b9f1027e430021269925103bb9">
compiler/GHC/Core/Opt/FloatOut.hs
</a>
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<li class="file-stats">
<a href="#cc763cdd1967f5d921161a32f64136cfcf0332c5">
compiler/GHC/Core/Opt/SetLevels.hs
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<li class="file-stats">
<a href="#d09e98aae6ad2eb59d08eac7894b68c0ab820cda">
compiler/GHC/Types/Demand.hs
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<li class="file-stats">
<a href="#4acb0ce23993edfcdf449179031dbe42823298b0">
<span class="new-file">
+
testsuite/tests/simplCore/should_compile/T18231.hs
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<li class="file-stats">
<a href="#5f4939320986b719243f5983eff02c3e05a0978d">
<span class="new-file">
+
testsuite/tests/simplCore/should_compile/T18231.stderr
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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="#08228c307d8dd4be4ffd180b4734096fabe603a5">
<span class="new-file">
+
testsuite/tests/stranal/sigs/T18086.hs
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</li>
<li class="file-stats">
<a href="#16c7c6c4536f779aecce5b5b9558c888043e2150">
<span class="new-file">
+
testsuite/tests/stranal/sigs/T18086.stderr
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</a>
</li>
<li class="file-stats">
<a href="#6cd3b38f9f19c00c9fb48ff8a444f1534e54ad95">
testsuite/tests/stranal/sigs/all.T
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</ul>
<h4>Changes:</h4>
<li id="0debbb6150cac3b9f1027e430021269925103bb9">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dc5f004c4dc27d78d3415adc54e9b6694b865145...08dab5f74e021ad054112cc5f6bb7e55d8796cd7#0debbb6150cac3b9f1027e430021269925103bb9"><strong>compiler/GHC/Core/Opt/FloatOut.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -15,7 +15,7 @@ import GHC.Prelude</td>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core</span></span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Utils</span></span>
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Make</span></span>
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<pre style="margin: 0;">-<span id="LC18" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Opt.Arity</span> <span class="idiff left"> </span><span class="p"><span class="idiff right">(</span></span> <span class="nf" style="color: #900; font-weight: 600;">etaExpand</span> <span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="18" 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="LC18" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Opt.Arity</span> <span class="p"><span class="idiff left">(</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">exprArity</span></span><span class="p"><span class="idiff right">,</span></span> <span class="nf" style="color: #900; font-weight: 600;">etaExpand</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Opt.Monad</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">FloatOutSwitches</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">)</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Session</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="221" 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">@@ -221,8 +221,9 @@ floatBind (NonRec (TB var _) rhs)</td>
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<pre style="margin: 0;"> <span id="LC221" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC222" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- A tiresome hack:</span></span>
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<pre style="margin: 0;"> <span id="LC223" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- see Note [Bottoming floats: eta expansion] in GHC.Core.Opt.SetLevels</span></span>
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<td class="diff-line-num old old_line" data-linenumber="224" 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="LC224" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">rhs''</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isDeadEndId</span> <span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">etaExpand</span> <span class="p">(</span><span class="n" style="color: #333;">idArity</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="n" style="color: #333;">rhs'</span></span>
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<td class="diff-line-num old old_line" data-linenumber="225" 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="LC225" 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;">rhs'</span></span>
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<pre style="margin: 0;">+<span id="LC224" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">rhs''</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isDeadEndId</span> <span class="n" style="color: #333;">var</span></span>
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<td class="diff-line-num new new_line" data-linenumber="225" 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="LC225" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">exprArity</span> <span class="n" style="color: #333;">rhs'</span> <span class="o" style="font-weight: 600;"><</span> <span class="n" style="color: #333;">idArity</span> <span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">etaExpand</span> <span class="p">(</span><span class="n" style="color: #333;">idArity</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="n" style="color: #333;">rhs'</span></span>
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<pre style="margin: 0;">+<span id="LC226" 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;">rhs'</span></span>
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<pre style="margin: 0;"> <span id="LC227" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC228" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="p">(</span><span class="n" style="color: #333;">fs</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_floats</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;">var</span> <span class="n" style="color: #333;">rhs''</span><span class="p">])</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC229" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dc5f004c4dc27d78d3415adc54e9b6694b865145...08dab5f74e021ad054112cc5f6bb7e55d8796cd7#cc763cdd1967f5d921161a32f64136cfcf0332c5"><strong>compiler/GHC/Core/Opt/SetLevels.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">@@ -952,6 +952,9 @@ Tiresomely, though, the simplifier has an invariant that the manifest</td>
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<pre style="margin: 0;"> <span id="LC952" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">arity of the RHS should be the same as the arity; but we can't call</span></span>
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<pre style="margin: 0;"> <span id="LC953" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">etaExpand during GHC.Core.Opt.SetLevels because it works over a decorated form of</span></span>
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<pre style="margin: 0;"> <span id="LC954" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">CoreExpr. So we do the eta expansion later, in GHC.Core.Opt.FloatOut.</span></span>
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<pre style="margin: 0;">+<span id="LC955" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But we should only eta-expand if the RHS doesn't already have the right</span></span>
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<pre style="margin: 0;">+<span id="LC956" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">exprArity, otherwise we get unnecessary top-level bindings if the RHS was</span></span>
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<pre style="margin: 0;">+<span id="LC957" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">trivial after the next run of the Simplifier.</span></span>
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<pre style="margin: 0;"> <span id="LC958" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC959" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Case MFEs]</span></span>
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<pre style="margin: 0;"> <span id="LC960" 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/-/compare/dc5f004c4dc27d78d3415adc54e9b6694b865145...08dab5f74e021ad054112cc5f6bb7e55d8796cd7#d09e98aae6ad2eb59d08eac7894b68c0ab820cda"><strong>compiler/GHC/Types/Demand.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">@@ -1055,11 +1055,19 @@ Is this strict in 'y'? Often not! If @foo x s@ might throw a precise exception</td>
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<pre style="margin: 0;"> <span id="LC1055" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(ultimately via raiseIO#), then we must not force 'y', which may fail to</span></span>
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<pre style="margin: 0;"> <span id="LC1056" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">terminate or throw an imprecise exception, until we have performed @foo x s@.</span></span>
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<pre style="margin: 0;"> <span id="LC1057" class="line" lang="haskell"></span>
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1058
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<pre style="margin: 0;">-<span id="LC1058" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So we have to '<span class="idiff left right">Demand.deferAfterPreciseException' (which just 'lub's with</span></span></span>
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1059
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<pre style="margin: 0;">-<span id="LC1059" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">'nopDmdType' to model the exceptional control flow) when @foo x s@</span></span></span>
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1060
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<pre style="margin: 0;">-<span id="LC1060" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">may throw a precise </span>exception. Motivated by T13380{d,e,f}.</span></span>
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<pre style="margin: 0;">+<span id="LC1058" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So we have to '<span class="idiff left right">deferAfterPreciseException' (which 'lub's with 'exnDmdType' to</span></span></span>
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<pre style="margin: 0;">+<span id="LC1059" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">model the exceptional control flow) when @foo x s@ may throw a precise</span></span></span>
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1060
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<pre style="margin: 0;">+<span id="LC1060" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">exception. Motivated by T13380{d,e,f}.</span></span>
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1061
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<pre style="margin: 0;"> <span id="LC1061" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">See Note [Which scrutinees may throw precise exceptions] in DmdAnal.</span></span>
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1062
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1062
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<pre style="margin: 0;"> <span id="LC1062" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1063" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We have to be careful not to discard dead-end Divergence from case</span></span>
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<pre style="margin: 0;">+<span id="LC1064" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">alternatives, though (#18086):</span></span>
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1065
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<pre style="margin: 0;">+<span id="LC1065" class="line" lang="haskell"></span>
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1066
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<pre style="margin: 0;">+<span id="LC1066" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> m = putStrLn "foo" >> error "bar"</span></span>
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1067
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<pre style="margin: 0;">+<span id="LC1067" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1068" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">'m' should still have 'exnDiv', which is why it is not sufficient to lub with</span></span>
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<pre style="margin: 0;">+<span id="LC1069" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">'nopDmdType' (which has 'topDiv') in 'deferAfterPreciseException'.</span></span>
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<pre style="margin: 0;">+<span id="LC1070" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1071" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Historical Note: This used to be called the "IO hack". But that term is rather</span></span>
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<pre style="margin: 0;"> <span id="LC1072" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">a bad fit because</span></span>
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<pre style="margin: 0;"> <span id="LC1073" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1. It's easily confused with the "State hack", which also affects IO.</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">@@ -1261,6 +1269,11 @@ isTopDmdType :: DmdType -> Bool</td>
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<pre style="margin: 0;"> <span id="LC1269" class="line" lang="haskell"><span class="n" style="color: #333;">isTopDmdType</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DmdType</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">args</span> <span class="n" style="color: #333;">div</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1270" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">div</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">topDiv</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">args</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">isEmptyVarEnv</span> <span class="n" style="color: #333;">env</span></span>
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<pre style="margin: 0;"> <span id="LC1271" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1272" class="line" lang="haskell"><span class="cd">-- | The demand type of an unspecified expression that is guaranteed to</span></span>
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<pre style="margin: 0;">+<span id="LC1273" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- throw a (precise or imprecise) exception or diverge.</span></span>
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<pre style="margin: 0;">+<span id="LC1274" class="line" lang="haskell"><span class="n" style="color: #333;">exnDmdType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DmdType</span></span>
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<pre style="margin: 0;">+<span id="LC1275" class="line" lang="haskell"><span class="n" style="color: #333;">exnDmdType</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DmdType</span> <span class="n" style="color: #333;">emptyDmdEnv</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">exnDiv</span></span>
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<pre style="margin: 0;">+<span id="LC1276" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1277" class="line" lang="haskell"><span class="n" style="color: #333;">dmdTypeDepth</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DmdType</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="LC1278" class="line" lang="haskell"><span class="n" style="color: #333;">dmdTypeDepth</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DmdType</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ds</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;">length</span> <span class="n" style="color: #333;">ds</span></span>
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1279
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<pre style="margin: 0;"> <span id="LC1279" 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">@@ -1303,13 +1316,17 @@ splitDmdTy (DmdType fv (dmd:dmds) res_ty) = (dmd, DmdType fv dmds res_ty)</td>
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1303
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1316
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<pre style="margin: 0;"> <span id="LC1316" class="line" lang="haskell"><span class="n" style="color: #333;">splitDmdTy</span> <span class="n" style="color: #333;">ty</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DmdType</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">res_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">defaultArgDmd</span> <span class="n" style="color: #333;">res_ty</span><span class="p">,</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span></span>
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1304
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1317
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<pre style="margin: 0;"> <span id="LC1317" class="line" lang="haskell"></span>
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1305
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1318
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<pre style="margin: 0;"> <span id="LC1318" class="line" lang="haskell"><span class="cd">-- | When e is evaluated after executing an IO action that may throw a precise</span></span>
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1306
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<pre style="margin: 0;">-<span id="LC1306" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- exception, and d is e's demand, then what of this demand should we consider?</span></span>
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1307
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<pre style="margin: 0;">-<span id="LC1307" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- * We have to kill all strictness demands (i.e. lub with a lazy demand)</span></span>
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1308
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<pre style="margin: 0;">-<span id="LC1308" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- * We can keep usage information (i.e. lub with an absent demand)</span></span>
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1309
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<pre style="margin: 0;">-<span id="LC1309" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- * We have to kill definite divergence</span></span>
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<pre style="margin: 0;">+<span id="LC1319" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- exception, we act as if there is an additional control flow path that is</span></span>
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<pre style="margin: 0;">+<span id="LC1320" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- taken if e throws a precise exception. The demand type of this control flow</span></span>
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<pre style="margin: 0;">+<span id="LC1321" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- path</span></span>
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<pre style="margin: 0;">+<span id="LC1322" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- * is lazy and absent ('topDmd') in all free variables and arguments</span></span>
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<pre style="margin: 0;">+<span id="LC1323" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- * has 'exnDiv' 'Divergence' result</span></span>
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1324
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<pre style="margin: 0;">+<span id="LC1324" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- So we can simply take a variant of 'nopDmdType', 'exnDmdType'.</span></span>
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<pre style="margin: 0;">+<span id="LC1325" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Why not 'nopDmdType'? Because then the result of 'e' can never be 'exnDiv'!</span></span>
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<pre style="margin: 0;">+<span id="LC1326" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- That means failure to drop dead-ends, see #18086.</span></span>
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1327
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<pre style="margin: 0;"> <span id="LC1327" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Precise exceptions and strictness analysis]</span></span>
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<pre style="margin: 0;"> <span id="LC1328" class="line" lang="haskell"><span class="n" style="color: #333;">deferAfterPreciseException</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DmdType</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DmdType</span></span>
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1312
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<pre style="margin: 0;">-<span id="LC1312" class="line" lang="haskell"><span class="n" style="color: #333;">deferAfterPreciseException</span> <span class="n" style="color: #333;"><span class="idiff left">d</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">lubDmdType</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">d</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">nop</span>DmdType</span></span>
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<pre style="margin: 0;">+<span id="LC1329" class="line" lang="haskell"><span class="n" style="color: #333;">deferAfterPreciseException</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">lubDmdType</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">exn</span>DmdType</span></span>
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<pre style="margin: 0;"> <span id="LC1330" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1331" class="line" lang="haskell"><span class="n" style="color: #333;">strictenDmd</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Demand</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CleanDemand</span></span>
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<pre style="margin: 0;"> <span id="LC1332" class="line" lang="haskell"><span class="n" style="color: #333;">strictenDmd</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">JD</span> <span class="p">{</span> <span class="n" style="color: #333;">sd</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">s</span><span class="p">,</span> <span class="n" style="color: #333;">ud</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">u</span><span class="p">})</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dc5f004c4dc27d78d3415adc54e9b6694b865145...08dab5f74e021ad054112cc5f6bb7e55d8796cd7#4acb0ce23993edfcdf449179031dbe42823298b0"><strong>testsuite/tests/simplCore/should_compile/T18231.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;">T18231</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</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">forever</span><span class="p">)</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;">Control.Monad.Trans.State.Strict</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;">m</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">State</span> <span class="kt" style="color: #458; font-weight: 600;">Int</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;">m</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">forever</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">modify'</span> <span class="p">(</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">1</span><span class="p">)</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dc5f004c4dc27d78d3415adc54e9b6694b865145...08dab5f74e021ad054112cc5f6bb7e55d8796cd7#5f4939320986b719243f5983eff02c3e05a0978d"><strong>testsuite/tests/simplCore/should_compile/T18231.stderr</strong></a>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">==================== Tidy Core ====================</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">Result size of Tidy Core = {terms: 30, types: 22, coercions: 5, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">-- RHS size: {terms: 1, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext">T18231.$trModule4 :: GHC.Prim.Addr#</span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext">T18231.$trModule4 = "main"#</span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="plaintext">-- RHS size: {terms: 2, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="plaintext">T18231.$trModule3 :: GHC.Types.TrName</span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext">T18231.$trModule3 = GHC.Types.TrNameS T18231.$trModule4</span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC13" 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="LC14" class="line" lang="plaintext">T18231.$trModule2 :: GHC.Prim.Addr#</span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="plaintext">T18231.$trModule2 = "T18231"#</span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC17" 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="LC18" class="line" lang="plaintext">T18231.$trModule1 :: GHC.Types.TrName</span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="plaintext">T18231.$trModule1 = GHC.Types.TrNameS T18231.$trModule2</span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="plaintext">-- RHS size: {terms: 3, types: 0, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="plaintext">T18231.$trModule :: GHC.Types.Module</span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="plaintext">T18231.$trModule = GHC.Types.Module T18231.$trModule3 T18231.$trModule1</span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="plaintext">Rec {</span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="plaintext">-- RHS size: {terms: 6, types: 1, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="plaintext">lvl :: GHC.Prim.Int# -> Data.Functor.Identity.Identity ((), Int)</span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="plaintext">lvl = \ (x :: GHC.Prim.Int#) -> T18231.m1 (GHC.Types.I# (GHC.Prim.+# x 1#))</span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="plaintext">-- RHS size: {terms: 6, types: 3, coercions: 0, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="plaintext">T18231.m1 :: Int -> Data.Functor.Identity.Identity ((), Int)</span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="plaintext">T18231.m1 = \ (s1 :: Int) -> case s1 of { GHC.Types.I# x -> lvl x }</span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="plaintext">end Rec }</span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="plaintext">-- RHS size: {terms: 1, types: 0, coercions: 5, joins: 0/0}</span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="plaintext">m :: State Int ()</span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="plaintext">m = T18231.m1 `cast` (Sym (Control.Monad.Trans.State.Strict.N:StateT[0] <Int>_N <Data.Functor.Identity.Identity>_R <()>_N) :: (Int -> Data.Functor.Identity.Identity ((), Int)) ~R# StateT Int Data.Functor.Identity.Identity ())</span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dc5f004c4dc27d78d3415adc54e9b6694b865145...08dab5f74e021ad054112cc5f6bb7e55d8796cd7#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 +319,8 @@ test('T17810', normal, multimod_compile, ['T17810', '-fspecialise-aggressively -</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;">T18013</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;">T18013</span><span class="p">',</span> <span class="p">'</span><span class="s1" style="color: #d14;">-v0 -O</span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC320" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18098</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</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;">-dcore-lint -O2</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;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18120</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</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;">-dcore-lint -O</span><span class="p">'])</span></span>
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<pre style="margin: 0;">+<span id="LC323" class="line" lang="perl"><span class="c1" style="color: #998; font-style: italic;"># Verify that there are only two top-level functions (the rec group of m's cast</span></span>
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<pre style="margin: 0;">+<span id="LC324" class="line" lang="perl"><span class="c1" style="color: #998; font-style: italic;"># WW worker m1). Ideally, it would be one, but we fail to inline dead-ending</span></span>
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<pre style="margin: 0;">+<span id="LC325" class="line" lang="perl"><span class="c1" style="color: #998; font-style: italic;"># recursive groups due to Note [Bottoming floats].</span></span>
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<pre style="margin: 0;">+<span id="LC326" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18231</span><span class="p">',</span> <span class="p">[</span> <span class="nv" style="color: #008080;">only_ways</span><span class="p">(['</span><span class="s1" style="color: #d14;">optasm</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;">w</span><span class="err" style="color: #a61717; background-color: #e3d2d2;">\</span><span class="s1" style="color: #d14;">.]+ ::.*->.*</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;">-ddump-simpl -dsuppress-idinfo -dppr-cols=99999 -dsuppress-uniques</span><span class="p">'])</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dc5f004c4dc27d78d3415adc54e9b6694b865145...08dab5f74e021ad054112cc5f6bb7e55d8796cd7#08228c307d8dd4be4ffd180b4734096fabe603a5"><strong>testsuite/tests/stranal/sigs/T18086.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;">{-# OPTIONS_GHC -O2 -fforce-recomp #-}</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;">T18086</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="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Stack</span></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Panic.Plain</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Exception</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">System.IO.Unsafe</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Should have strictness signature <L,U>x, emphasis on the exceptional</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- divergence result.</span></span>
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<pre style="margin: 0;">+<span id="LC11" 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;">IO</span> <span class="nb" style="color: #0086b3;">()</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="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="LC13" class="line" lang="haskell"> <span class="n" style="color: #333;">putStrLn</span> <span class="s" style="color: #d14;">"foo"</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"> <span class="n" style="color: #333;">error</span> <span class="s" style="color: #d14;">"bar"</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Dito, just in a more complex scenario (the original reproducer of #18086)</span></span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="n" style="color: #333;">panic</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">String</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"><span class="n" style="color: #333;">panic</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unsafeDupablePerformIO</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="LC19" class="line" lang="haskell"> <span class="n" style="color: #333;">stack</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ccsToStrings</span> <span class="o" style="font-weight: 600;">=<<</span> <span class="n" style="color: #333;">getCurrentCCS</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">stack</span></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">throw</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PlainPanic</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">throw</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PlainPanic</span> <span class="p">(</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">++</span> <span class="sc" style="color: #d14;">'</span><span class="se" style="color: #d14;">\n</span><span class="sc" style="color: #d14;">'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">renderStack</span> <span class="n" style="color: #333;">stack</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"></span></pre>
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<li id="16c7c6c4536f779aecce5b5b9558c888043e2150">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dc5f004c4dc27d78d3415adc54e9b6694b865145...08dab5f74e021ad054112cc5f6bb7e55d8796cd7#16c7c6c4536f779aecce5b5b9558c888043e2150"><strong>testsuite/tests/stranal/sigs/T18086.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">==================== Strictness signatures ====================</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">T18086.$trModule:</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">T18086.m: <L,U>x</span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">T18086.panic: <L,U>x</span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="plaintext">==================== Cpr signatures ====================</span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="plaintext">T18086.$trModule:</span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext">T18086.m: b</span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="plaintext">T18086.panic:</span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="plaintext">==================== Strictness signatures ====================</span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext">T18086.$trModule:</span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="plaintext">T18086.m: <L,U>x</span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="plaintext">T18086.panic: <L,U>x</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"></span></pre>
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<li id="6cd3b38f9f19c00c9fb48ff8a444f1534e54ad95">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dc5f004c4dc27d78d3415adc54e9b6694b865145...08dab5f74e021ad054112cc5f6bb7e55d8796cd7#6cd3b38f9f19c00c9fb48ff8a444f1534e54ad95"><strong>testsuite/tests/stranal/sigs/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">@@ -22,3 +22,4 @@ test('T5075', normal, compile, [''])</td>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17932</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T13380c</span><span class="p">',</span> <span class="nv" style="color: #008080;">expect_broken</span><span class="p">('</span><span class="s1" style="color: #d14;">!3014</span><span class="p">'),</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;"> <span id="LC24" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T13380f</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18086</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</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;">-package ghc</span><span class="p">'])</span></span></pre>
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