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<h3>
Simon Jakobi pushed to branch wip/sjakobi/nondetfolds
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464">d058ecc3</a></strong>
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<span>by Simon Jakobi</span>
<i>at 2020-03-31T20:19:24+02:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Convert some existing non-det folds to be strict
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<h4>13 changed files:</h4>
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<a href="#3aba9ceb20d68f25343fe3a27b2b7a4f8fea68da">
compiler/GHC/CmmToAsm/Reg/Graph/SpillClean.hs
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<li class="file-stats">
<a href="#91648438362e5a35363d2bb7abb04016dedd7d7e">
compiler/GHC/Core/FamInstEnv.hs
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<li class="file-stats">
<a href="#9e2ce77a946950b2d19d75c55f671c048a5645bd">
compiler/GHC/Core/Op/OccurAnal.hs
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<li class="file-stats">
<a href="#de7d9d388885ce6e3a45a39fac6e2c36a7f94f69">
compiler/GHC/Core/Op/SetLevels.hs
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<li class="file-stats">
<a href="#d52bc1e90d7432064a2998de2a2751b6fecb7680">
compiler/GHC/Core/Op/Specialise.hs
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<li class="file-stats">
<a href="#039e8f5676356ef05c90af828aae48aac7296e47">
compiler/GHC/Core/TyCo/FVs.hs
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<li class="file-stats">
<a href="#89a2e0e1a3095c7a42b10f2819049908908080e8">
compiler/GHC/Core/Unify.hs
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<li class="file-stats">
<a href="#74a7b3677ea9cb2138e0b682ce38fd67dbf57c14">
compiler/GHC/HsToCore/Usage.hs
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<li class="file-stats">
<a href="#9e7e910f99e3a46d2caa3b0102d7481a88f80960">
compiler/GHC/Rename/Source.hs
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<li class="file-stats">
<a href="#b0b25f424f682f899323d3f74070dbe8fd59628e">
compiler/GHC/Types/Unique/FM.hs
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<a href="#71ee8226465c3f394f18d0bddd00077942947740">
compiler/GHC/Types/Unique/Set.hs
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<li class="file-stats">
<a href="#89165943f253c43100bca06548eba40ff0519ca5">
compiler/typecheck/TcEvidence.hs
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<li class="file-stats">
<a href="#fadb1ee8bcf9d6112f1216f52f995b0298a593b2">
compiler/utils/GraphOps.hs
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<h4>Changes:</h4>
<li id="3aba9ceb20d68f25343fe3a27b2b7a4f8fea68da">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#3aba9ceb20d68f25343fe3a27b2b7a4f8fea68da"><strong>compiler/GHC/CmmToAsm/Reg/Graph/SpillClean.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">@@ -554,8 +554,8 @@ delAssoc :: (Uniquable a)</td>
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<pre style="margin: 0;"> <span id="LC554" class="line" lang="haskell"><span class="n" style="color: #333;">delAssoc</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">m</span></span>
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<pre style="margin: 0;"> <span id="LC555" 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;">aSet</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lookupUFM</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;"> <span id="LC556" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">m1</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">delFromUFM</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">-<span id="LC557" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left">FoldUniqSet</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">m</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">delAssoc1</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="n" style="color: #333;">m1</span> <span class="n" style="color: #333;">aSet</span></span>
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<pre style="margin: 0;">-<span id="LC558" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUFM here because deletion is commutative</span></span>
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<pre style="margin: 0;">+<span id="LC557" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left">StrictFoldUniqSet</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">m</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">x</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">delAssoc1</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="n" style="color: #333;">m1</span> <span class="n" style="color: #333;">aSet</span></span>
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<pre style="margin: 0;">+<span id="LC558" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDet<span class="idiff left right">Strict</span>FoldUFM here because deletion is commutative</span></span>
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<pre style="margin: 0;"> <span id="LC559" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC560" 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;">m</span></span>
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<pre style="margin: 0;"> <span id="LC561" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#91648438362e5a35363d2bb7abb04016dedd7d7e"><strong>compiler/GHC/Core/FamInstEnv.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">@@ -378,8 +378,8 @@ famInstEnvElts fi = [elt | FamIE elts <- eltsUDFM fi, elt <- elts]</td>
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<pre style="margin: 0;"> <span id="LC378" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [FamInstEnv determinism]</span></span>
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<pre style="margin: 0;"> <span id="LC379" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC380" class="line" lang="haskell"><span class="n" style="color: #333;">famInstEnvSize</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">FamInstEnv</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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<pre style="margin: 0;">-<span id="LC381" class="line" lang="haskell"><span class="n" style="color: #333;">famInstEnvSize</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left">FoldUDFM</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">FamIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">elt</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">sum</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">sum</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">elt</span><span class="p">)</span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;">-<span id="LC382" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUDFM here since we're just computing the</span></span>
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<pre style="margin: 0;">+<span id="LC381" class="line" lang="haskell"><span class="n" style="color: #333;">famInstEnvSize</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left">StrictFoldUDFM</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">sum</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">FamIE</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">elt</span></span><span class="p"><span class="idiff right">)</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">sum</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">elt</span><span class="p">)</span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;">+<span id="LC382" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDet<span class="idiff left right">Strict</span>FoldUDFM here since we're just computing the</span></span>
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<pre style="margin: 0;"> <span id="LC383" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- size.</span></span>
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<pre style="margin: 0;"> <span id="LC384" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC385" class="line" lang="haskell"><span class="n" style="color: #333;">familyInstances</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">FamInstEnv</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">FamInstEnv</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">FamInst</span><span class="p">]</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#9e2ce77a946950b2d19d75c55f671c048a5645bd"><strong>compiler/GHC/Core/Op/OccurAnal.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">@@ -2204,8 +2204,8 @@ extendFvs env s</td>
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<pre style="margin: 0;"> <span id="LC2204" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">s</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">extras</span><span class="p">,</span> <span class="n" style="color: #333;">extras</span> <span class="p">`</span><span class="n" style="color: #333;">subVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">s</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC2205" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC2206" class="line" lang="haskell"> <span class="n" style="color: #333;">extras</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;">-- env(s)</span></span>
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<pre style="margin: 0;">-<span id="LC2207" class="line" lang="haskell"> <span class="n" style="color: #333;">extras</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetFoldUFM</span> <span class="n" style="color: #333;">unionVarSet</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC2208" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUFM here because unionVarSet commutes</span></span>
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<pre style="margin: 0;">+<span id="LC2207" class="line" lang="haskell"> <span class="n" style="color: #333;">extras</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left right">Strict</span>FoldUFM</span> <span class="n" style="color: #333;">unionVarSet</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC2208" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDet<span class="idiff left right">Strict</span>FoldUFM here because unionVarSet commutes</span></span>
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<pre style="margin: 0;"> <span id="LC2209" class="line" lang="haskell"> <span class="n" style="color: #333;">intersectUFM_C</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">x</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">getUniqSet</span> <span class="n" style="color: #333;">s</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC2210" class="line" lang="haskell"></span>
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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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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2502,8 +2502,8 @@ addOneOcc ud id info</td>
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<pre style="margin: 0;"> <span id="LC2502" class="line" lang="haskell"> <span class="n" style="color: #333;">plus_zapped</span> <span class="n" style="color: #333;">old</span> <span class="n" style="color: #333;">new</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">doZapping</span> <span class="n" style="color: #333;">ud</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">old</span> <span class="p">`</span><span class="n" style="color: #333;">addOccInfo</span><span class="p">`</span> <span class="n" style="color: #333;">new</span></span>
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<pre style="margin: 0;"> <span id="LC2503" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2504" class="line" lang="haskell"><span class="n" style="color: #333;">addManyOccsSet</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span></span>
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<pre style="margin: 0;">-<span id="LC2505" class="line" lang="haskell"><span class="n" style="color: #333;">addManyOccsSet</span> <span class="n" style="color: #333;">usage</span> <span class="n" style="color: #333;">id_set</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left">FoldUniqSet</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">addManyOccs</span></span> <span class="n" style="color: #333;">usage</span> <span class="n" style="color: #333;">id_set</span></span>
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<pre style="margin: 0;">-<span id="LC2506" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUFM here because addManyOccs commutes</span></span>
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<pre style="margin: 0;">+<span id="LC2505" class="line" lang="haskell"><span class="n" style="color: #333;">addManyOccsSet</span> <span class="n" style="color: #333;">usage</span> <span class="n" style="color: #333;">id_set</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left">StrictFoldUniqSet</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">flip</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">addManyOccs</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">usage</span> <span class="n" style="color: #333;">id_set</span></span>
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<pre style="margin: 0;">+<span id="LC2506" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDet<span class="idiff left right">Strict</span>FoldUFM here because addManyOccs commutes</span></span>
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<pre style="margin: 0;"> <span id="LC2507" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2508" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Add several occurrences, assumed not to be tail calls</span></span>
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<pre style="margin: 0;"> <span id="LC2509" class="line" lang="haskell"><span class="n" style="color: #333;">addManyOccs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span></span>
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<li id="de7d9d388885ce6e3a45a39fac6e2c36a7f94f69">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#de7d9d388885ce6e3a45a39fac6e2c36a7f94f69"><strong>compiler/GHC/Core/Op/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">@@ -83,7 +83,7 @@ import GHC.Types.Id</td>
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<pre style="margin: 0;"> <span id="LC83" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Id.Info</span></span>
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<pre style="margin: 0;"> <span id="LC84" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var</span></span>
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<pre style="margin: 0;"> <span id="LC85" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Set</span></span>
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<pre style="margin: 0;">-<span id="LC86" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.Set</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetFoldUniqSet</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC86" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.Set</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">nonDet<span class="idiff left right">Strict</span>FoldUniqSet</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC87" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.DSet</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">getUniqDSet</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC88" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Env</span></span>
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<pre style="margin: 0;"> <span id="LC89" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Literal</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">litIsTrivial</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">@@ -1469,11 +1469,11 @@ isFunction (_, AnnLam b e) | isId b = True</td>
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<pre style="margin: 0;"> <span id="LC1469" class="line" lang="haskell"><span class="n" style="color: #333;">isFunction</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="LC1470" class="line" lang="haskell"></span>
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1471
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<pre style="margin: 0;"> <span id="LC1471" class="line" lang="haskell"><span class="n" style="color: #333;">countFreeIds</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DVarSet</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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<pre style="margin: 0;">-<span id="LC1472" class="line" lang="haskell"><span class="n" style="color: #333;">countFreeIds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetFoldUDFM</span> <span class="n" style="color: #333;">add</span> <span class="mi" style="color: #099;">0</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">getUniqDSet</span></span>
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<pre style="margin: 0;">-<span id="LC1473" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUDFM here because we're just counting things.</span></span>
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<pre style="margin: 0;">+<span id="LC1472" class="line" lang="haskell"><span class="n" style="color: #333;">countFreeIds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left right">Strict</span>FoldUDFM</span> <span class="n" style="color: #333;">add</span> <span class="mi" style="color: #099;">0</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">getUniqDSet</span></span>
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<pre style="margin: 0;">+<span id="LC1473" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDet<span class="idiff left right">Strict</span>FoldUDFM here because we're just counting things.</span></span>
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<pre style="margin: 0;"> <span id="LC1474" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC1475" class="line" lang="haskell"> <span class="n" style="color: #333;">add</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Var</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Int</span></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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<pre style="margin: 0;">-<span id="LC1476" class="line" lang="haskell"> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;"><span class="idiff left">v</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">n</span></span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isId</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">n</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">1</span></span>
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<pre style="margin: 0;">+<span id="LC1475" class="line" lang="haskell"> <span class="n" style="color: #333;">add</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Int</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Var</span></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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<pre style="margin: 0;">+<span id="LC1476" class="line" lang="haskell"> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;"><span class="idiff left">n</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">v</span></span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isId</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">n</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">1</span></span>
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<pre style="margin: 0;"> <span id="LC1477" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">n</span></span>
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<pre style="margin: 0;"> <span id="LC1478" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1479" 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">@@ -1586,7 +1586,7 @@ maxFvLevel max_me env var_set</td>
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<pre style="margin: 0;"> <span id="LC1586" class="line" lang="haskell"><span class="n" style="color: #333;">maxFvLevel'</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LevelEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyCoVarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Level</span></span>
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<pre style="margin: 0;"> <span id="LC1587" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Same but for TyCoVarSet</span></span>
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<pre style="margin: 0;"> <span id="LC1588" class="line" lang="haskell"><span class="n" style="color: #333;">maxFvLevel'</span> <span class="n" style="color: #333;">max_me</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">var_set</span></span>
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<pre style="margin: 0;">-<span id="LC1589" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left">FoldUniqSet</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">maxIn</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">max_me</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">env</span></span><span class="p">)</span> <span class="n" style="color: #333;">tOP_LEVEL</span> <span class="n" style="color: #333;">var_set</span></span>
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<pre style="margin: 0;">+<span id="LC1589" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left">StrictFoldUniqSet</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">flip</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">maxIn</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">max_me</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="p"><span class="idiff right">)</span>)</span> <span class="n" style="color: #333;">tOP_LEVEL</span> <span class="n" style="color: #333;">var_set</span></span>
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<pre style="margin: 0;"> <span id="LC1590" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1591" class="line" lang="haskell"><span class="n" style="color: #333;">maxIn</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LevelEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">InVar</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Level</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Level</span></span>
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<pre style="margin: 0;"> <span id="LC1592" class="line" lang="haskell"><span class="n" style="color: #333;">maxIn</span> <span class="n" style="color: #333;">max_me</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LE</span> <span class="p">{</span> <span class="n" style="color: #333;">le_lvl_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lvl_env</span><span class="p">,</span> <span class="n" style="color: #333;">le_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">id_env</span> <span class="p">})</span> <span class="n" style="color: #333;">in_var</span> <span class="n" style="color: #333;">lvl</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#d52bc1e90d7432064a2998de2a2751b6fecb7680"><strong>compiler/GHC/Core/Op/Specialise.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2177,8 +2177,8 @@ unionCallInfoSet (CIS f calls1) (CIS _ calls2) =</td>
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2177
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<pre style="margin: 0;"> <span id="LC2177" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2178" class="line" lang="haskell"><span class="n" style="color: #333;">callDetailsFVs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CallDetails</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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2179
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2179
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<pre style="margin: 0;"> <span id="LC2179" class="line" lang="haskell"><span class="n" style="color: #333;">callDetailsFVs</span> <span class="n" style="color: #333;">calls</span> <span class="o" style="font-weight: 600;">=</span></span>
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2180
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<pre style="margin: 0;">-<span id="LC2180" class="line" lang="haskell"> <span class="n" style="color: #333;">nonDet<span class="idiff left">FoldUDFM</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">unionVarSet</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 right">callInfoFVs</span></span><span class="p">)</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">calls</span></span>
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2181
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<pre style="margin: 0;">-<span id="LC2181" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUDFM here because we forget the ordering</span></span>
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<pre style="margin: 0;">+<span id="LC2180" class="line" lang="haskell"> <span class="n" style="color: #333;">nonDet<span class="idiff left">StrictFoldUDFM</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">flip</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">unionVarSet</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">callInfoFVs</span></span><span class="p"><span class="idiff right">)</span>)</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">calls</span></span>
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<pre style="margin: 0;">+<span id="LC2181" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDet<span class="idiff left right">Strict</span>FoldUDFM here because we forget the ordering</span></span>
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<pre style="margin: 0;"> <span id="LC2182" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- immediately by converting to a nondeterministic set.</span></span>
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<pre style="margin: 0;"> <span id="LC2183" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2184" class="line" lang="haskell"><span class="n" style="color: #333;">callInfoFVs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CallInfoSet</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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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#039e8f5676356ef05c90af828aae48aac7296e47"><strong>compiler/GHC/Core/TyCo/FVs.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">@@ -441,7 +441,7 @@ deepCoVarFolder = TyCoFolder { tcf_view = noView</td>
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<pre style="margin: 0;"> <span id="LC441" class="line" lang="haskell"><span class="n" style="color: #333;">closeOverKinds</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyCoVarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyCoVarSet</span></span>
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<pre style="margin: 0;"> <span id="LC442" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- For each element of the input set,</span></span>
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<pre style="margin: 0;"> <span id="LC443" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- add the deep free variables of its kind</span></span>
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<pre style="margin: 0;">-<span id="LC444" class="line" lang="haskell"><span class="n" style="color: #333;">closeOverKinds</span> <span class="n" style="color: #333;">vs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetFoldVarSet</span> <span class="n" style="color: #333;">do_one</span> <span class="n" style="color: #333;">vs</span> <span class="n" style="color: #333;">vs</span></span>
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<pre style="margin: 0;">+<span id="LC444" class="line" lang="haskell"><span class="n" style="color: #333;">closeOverKinds</span> <span class="n" style="color: #333;">vs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetFoldVarSet</span> <span class="n" style="color: #333;">do_one</span> <span class="n" style="color: #333;">vs</span> <span class="n" style="color: #333;">vs</span><span class="idiff left"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- TODO?</span></span></span>
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445
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<pre style="margin: 0;"> <span id="LC445" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC446" class="line" lang="haskell"> <span class="n" style="color: #333;">do_one</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">acc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">appEndo</span> <span class="p">(</span><span class="n" style="color: #333;">deep_ty</span> <span class="p">(</span><span class="n" style="color: #333;">varType</span> <span class="n" style="color: #333;">v</span><span class="p">))</span> <span class="n" style="color: #333;">acc</span></span>
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<pre style="margin: 0;"> <span id="LC447" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#89a2e0e1a3095c7a42b10f2819049908908080e8"><strong>compiler/GHC/Core/Unify.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">@@ -658,8 +658,8 @@ niSubstTvSet :: TvSubstEnv -> TyCoVarSet -> TyCoVarSet</td>
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<pre style="margin: 0;"> <span id="LC658" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- remembering that the substitution isn't necessarily idempotent</span></span>
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<pre style="margin: 0;"> <span id="LC659" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This is used in the occurs check, before extending the substitution</span></span>
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<pre style="margin: 0;"> <span id="LC660" class="line" lang="haskell"><span class="n" style="color: #333;">niSubstTvSet</span> <span class="n" style="color: #333;">tsubst</span> <span class="n" style="color: #333;">tvs</span></span>
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<pre style="margin: 0;">-<span id="LC661" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left">FoldUniqSet</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">unionVarSet</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 right">get</span></span><span class="p">)</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">tvs</span></span>
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<pre style="margin: 0;">-<span id="LC662" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to nonDetFoldUFM here because we immediately forget the</span></span>
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<pre style="margin: 0;">+<span id="LC661" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left">StrictFoldUniqSet</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">flip</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">unionVarSet</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">get</span></span><span class="p"><span class="idiff right">)</span>)</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">tvs</span></span>
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<pre style="margin: 0;">+<span id="LC662" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to nonDet<span class="idiff left right">Strict</span>FoldUFM here because we immediately forget the</span></span>
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<pre style="margin: 0;"> <span id="LC663" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ordering by creating a set.</span></span>
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<pre style="margin: 0;"> <span id="LC664" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC665" class="line" lang="haskell"> <span class="n" style="color: #333;">get</span> <span class="n" style="color: #333;">tv</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#74a7b3677ea9cb2138e0b682ce38fd67dbf57c14"><strong>compiler/GHC/HsToCore/Usage.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">@@ -260,7 +260,7 @@ mk_mod_usage_info pit hsc_env this_mod direct_imports used_names</td>
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<pre style="margin: 0;"> <span id="LC260" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ent_map groups together all the things imported and used</span></span>
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<pre style="margin: 0;"> <span id="LC261" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- from a particular module</span></span>
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<pre style="margin: 0;"> <span id="LC262" class="line" lang="haskell"> <span class="n" style="color: #333;">ent_map</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ModuleEnv</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">OccName</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC263" class="line" lang="haskell"> <span class="n" style="color: #333;">ent_map</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetFoldUniqSet</span> <span class="n" style="color: #333;">add_mv</span> <span class="n" style="color: #333;">emptyModuleEnv</span> <span class="n" style="color: #333;">used_names</span></span>
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<pre style="margin: 0;">+<span id="LC263" class="line" lang="haskell"> <span class="n" style="color: #333;">ent_map</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetFoldUniqSet</span> <span class="n" style="color: #333;">add_mv</span> <span class="n" style="color: #333;">emptyModuleEnv</span> <span class="n" style="color: #333;">used_names</span><span class="idiff left"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- TODO?</span></span></span>
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<pre style="margin: 0;"> <span id="LC264" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- nonDetFoldUFM is OK here. If you follow the logic, we sort by OccName</span></span>
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<pre style="margin: 0;"> <span id="LC265" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in ent_hashs</span></span>
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<pre style="margin: 0;"> <span id="LC266" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#9e7e910f99e3a46d2caa3b0102d7481a88f80960"><strong>compiler/GHC/Rename/Source.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">@@ -1422,11 +1422,11 @@ depAnalTyClDecls rdr_env kisig_fv_env ds_w_fvs</td>
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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="n" style="color: #333;">toParents</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">GlobalRdrEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NameSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NameSet</span></span>
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<pre style="margin: 0;"> <span id="LC1424" class="line" lang="haskell"><span class="n" style="color: #333;">toParents</span> <span class="n" style="color: #333;">rdr_env</span> <span class="n" style="color: #333;">ns</span></span>
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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;">nonDetFoldUniqSet</span> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;">emptyNameSet</span> <span class="n" style="color: #333;">ns</span></span>
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<pre style="margin: 0;">-<span id="LC1426" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUFM because we immediately forget the</span></span>
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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;">nonDet<span class="idiff left right">Strict</span>FoldUniqSet</span> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;">emptyNameSet</span> <span class="n" style="color: #333;">ns</span></span>
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<pre style="margin: 0;">+<span id="LC1426" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDet<span class="idiff left right">Strict</span>FoldUFM because we immediately forget the</span></span>
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<pre style="margin: 0;"> <span id="LC1427" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ordering by creating a set</span></span>
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<pre style="margin: 0;"> <span id="LC1428" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC1429" class="line" lang="haskell"> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;"><span class="idiff left">n</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">s</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendNameSet</span> <span class="n" style="color: #333;">s</span> <span class="p">(</span><span class="n" style="color: #333;">getParent</span> <span class="n" style="color: #333;">rdr_env</span> <span class="n" style="color: #333;">n</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1429" class="line" lang="haskell"> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;"><span class="idiff left">s</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">n</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendNameSet</span> <span class="n" style="color: #333;">s</span> <span class="p">(</span><span class="n" style="color: #333;">getParent</span> <span class="n" style="color: #333;">rdr_env</span> <span class="n" style="color: #333;">n</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1430" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1431" class="line" lang="haskell"><span class="n" style="color: #333;">getParent</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">GlobalRdrEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Name</span></span>
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<pre style="margin: 0;"> <span id="LC1432" class="line" lang="haskell"><span class="n" style="color: #333;">getParent</span> <span class="n" style="color: #333;">rdr_env</span> <span class="n" style="color: #333;">n</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#b0b25f424f682f899323d3f74070dbe8fd59628e"><strong>compiler/GHC/Types/Unique/FM.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">@@ -56,7 +56,7 @@ module GHC.Types.Unique.FM (</td>
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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">intersectUFM_C</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC57" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">disjointUFM</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">equalKeysUFM</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC59" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nonDetFoldUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">foldUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetFoldUFM_Directly</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC59" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nonDetFoldUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;"><span class="idiff left">nonDetStrictFoldUFM</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff right"> </span><span class="nf" style="color: #900; font-weight: 600;">foldUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetFoldUFM_Directly</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC60" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">anyUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">allUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">seqEltsUFM</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC61" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mapUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mapUFM_Directly</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC62" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">elemUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">elemUFM_Directly</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">@@ -321,6 +321,9 @@ nonDetKeysUFM (UFM m) = map getUnique $ M.keys m</td>
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<pre style="margin: 0;"> <span id="LC321" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetFoldUFM</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">elt</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;">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;">UniqFM</span> <span class="n" style="color: #333;">elt</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="LC322" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetFoldUFM</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">z</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UFM</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;">M</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">z</span> <span class="n" style="color: #333;">m</span></span>
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<pre style="margin: 0;"> <span id="LC323" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC324" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetStrictFoldUFM</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">elt</span> <span class="o" style="font-weight: 600;">-></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;">UniqFM</span> <span class="n" style="color: #333;">elt</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="LC325" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetStrictFoldUFM</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">z</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UFM</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;">M</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">foldl'</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">z</span> <span class="n" style="color: #333;">m</span></span>
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<pre style="margin: 0;">+<span id="LC326" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC327" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Deterministic UniqFM] to learn about nondeterminism.</span></span>
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<pre style="margin: 0;"> <span id="LC328" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If you use this please provide a justification why it doesn't introduce</span></span>
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<pre style="margin: 0;"> <span id="LC329" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- nondeterminism.</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#71ee8226465c3f394f18d0bddd00077942947740"><strong>compiler/GHC/Types/Unique/Set.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">@@ -43,6 +43,7 @@ module GHC.Types.Unique.Set (</td>
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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nonDetEltsUniqSet</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nonDetKeysUniqSet</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nonDetFoldUniqSet</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nonDetStrictFoldUniqSet</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nonDetFoldUniqSet_Directly</span></span>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell"> <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC49" 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">@@ -166,6 +167,9 @@ nonDetKeysUniqSet = nonDetKeysUFM . getUniqSet'</td>
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<pre style="margin: 0;"> <span id="LC167" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetFoldUniqSet</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">elt</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;">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;">UniqSet</span> <span class="n" style="color: #333;">elt</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="LC168" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetFoldUniqSet</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">n</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UniqSet</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetFoldUFM</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">s</span></span>
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169
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<pre style="margin: 0;"> <span id="LC169" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetStrictFoldUniqSet</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">elt</span> <span class="o" style="font-weight: 600;">-></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;">UniqSet</span> <span class="n" style="color: #333;">elt</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="LC171" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetStrictFoldUniqSet</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">n</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UniqSet</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetStrictFoldUFM</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">s</span></span>
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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC173" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Deterministic UniqFM] to learn about nondeterminism.</span></span>
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174
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<pre style="margin: 0;"> <span id="LC174" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If you use this please provide a justification why it doesn't introduce</span></span>
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<pre style="margin: 0;"> <span id="LC175" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- nondeterminism.</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#89165943f253c43100bca06548eba40ff0519ca5"><strong>compiler/typecheck/TcEvidence.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">@@ -862,12 +862,12 @@ findNeededEvVars ev_binds seeds</td>
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<pre style="margin: 0;"> <span id="LC862" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">transCloVarSet</span> <span class="n" style="color: #333;">also_needs</span> <span class="n" style="color: #333;">seeds</span></span>
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<pre style="margin: 0;"> <span id="LC863" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC864" class="line" lang="haskell"> <span class="n" style="color: #333;">also_needs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</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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865
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<pre style="margin: 0;">-<span id="LC865" class="line" lang="haskell"> <span class="n" style="color: #333;">also_needs</span> <span class="n" style="color: #333;">needs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetFoldUniqSet</span> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">needs</span></span>
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866
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<pre style="margin: 0;">-<span id="LC866" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUFM here because we immediately</span></span>
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<pre style="margin: 0;">+<span id="LC865" class="line" lang="haskell"> <span class="n" style="color: #333;">also_needs</span> <span class="n" style="color: #333;">needs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDet<span class="idiff left right">Strict</span>FoldUniqSet</span> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">needs</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;">-- It's OK to use nonDet<span class="idiff left right">Strict</span>FoldUFM here because we immediately</span></span>
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867
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<pre style="margin: 0;"> <span id="LC867" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- forget about the ordering by creating a set</span></span>
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868
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868
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<pre style="margin: 0;"> <span id="LC868" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC869" class="line" lang="haskell"> <span class="n" style="color: #333;">add</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">VarSet</span></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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<pre style="margin: 0;">-<span id="LC870" class="line" lang="haskell"> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;"><span class="idiff left">v</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">needs</span></span></span>
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<pre style="margin: 0;">+<span id="LC869" class="line" lang="haskell"> <span class="n" style="color: #333;">add</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Var<span class="idiff left">Set</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Var</span></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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<pre style="margin: 0;">+<span id="LC870" class="line" lang="haskell"> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;"><span class="idiff left">needs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">v</span></span></span>
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871
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<pre style="margin: 0;"> <span id="LC871" 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;">ev_bind</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lookupEvBind</span> <span class="n" style="color: #333;">ev_binds</span> <span class="n" style="color: #333;">v</span></span>
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872
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<pre style="margin: 0;"> <span id="LC872" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">EvBind</span> <span class="p">{</span> <span class="n" style="color: #333;">eb_is_given</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">is_given</span><span class="p">,</span> <span class="n" style="color: #333;">eb_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ev_bind</span></span>
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<pre style="margin: 0;"> <span id="LC873" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">is_given</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d058ecc3bb567581d6d2a01d9cd8878b22fd9464#fadb1ee8bcf9d6112f1216f52f995b0298a593b2"><strong>compiler/utils/GraphOps.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">@@ -63,7 +63,7 @@ addNode k node graph</td>
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<pre style="margin: 0;"> <span id="LC63" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span></span>
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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- add back conflict edges from other nodes to this one</span></span>
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<pre style="margin: 0;"> <span id="LC65" class="line" lang="haskell"> <span class="n" style="color: #333;">map_conflict</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC66" class="line" lang="haskell"> <span class="n" style="color: #333;">nonDetFoldUniqSet</span></span>
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<pre style="margin: 0;">+<span id="LC66" class="line" lang="haskell"> <span class="n" style="color: #333;">nonDetFoldUniqSet</span><span class="idiff left"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- TODO?</span></span></span>
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67
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUFM here because the</span></span>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- operation is commutative</span></span>
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69
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">adjustUFM_C</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">n</span> <span class="p">{</span> <span class="n" style="color: #333;">nodeConflicts</span> <span class="o" style="font-weight: 600;">=</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">@@ -73,7 +73,7 @@ addNode k node graph</td>
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<pre style="margin: 0;"> <span id="LC73" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- add back coalesce edges from other nodes to this one</span></span>
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<pre style="margin: 0;"> <span id="LC75" class="line" lang="haskell"> <span class="n" style="color: #333;">map_coalesce</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC76" class="line" lang="haskell"> <span class="n" style="color: #333;">nonDetFoldUniqSet</span></span>
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<pre style="margin: 0;">+<span id="LC76" class="line" lang="haskell"> <span class="n" style="color: #333;">nonDetFoldUniqSet</span><span class="idiff left"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- TODO?</span></span></span>
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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUFM here because the</span></span>
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<pre style="margin: 0;"> <span id="LC78" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- operation is commutative</span></span>
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<pre style="margin: 0;"> <span id="LC79" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">adjustUFM_C</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">n</span> <span class="p">{</span> <span class="n" style="color: #333;">nodeCoalesce</span> <span class="o" style="font-weight: 600;">=</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">@@ -476,7 +476,7 @@ freezeNode k</td>
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<pre style="margin: 0;"> <span id="LC476" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">node</span> <span class="c1" style="color: #998; font-style: italic;">-- panic "GraphOps.freezeNode: edge to freeze wasn't in the coalesce set"</span></span>
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<pre style="margin: 0;"> <span id="LC477" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- If the edge isn't actually in the coelesce set then just ignore it.</span></span>
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<pre style="margin: 0;"> <span id="LC478" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC479" class="line" lang="haskell"> <span class="n" style="color: #333;">fm2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetFoldUniqSet</span> <span class="p">(</span><span class="n" style="color: #333;">adjustUFM_C</span> <span class="p">(</span><span class="n" style="color: #333;">freezeEdge</span> <span class="n" style="color: #333;">k</span><span class="p">))</span> <span class="n" style="color: #333;">fm1</span></span>
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<pre style="margin: 0;">+<span id="LC479" class="line" lang="haskell"> <span class="n" style="color: #333;">fm2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetFoldUniqSet</span> <span class="p">(</span><span class="n" style="color: #333;">adjustUFM_C</span> <span class="p">(</span><span class="n" style="color: #333;">freezeEdge</span> <span class="n" style="color: #333;">k</span><span class="p">))</span> <span class="n" style="color: #333;">fm1</span><span class="idiff left"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- TODO?</span></span></span>
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<pre style="margin: 0;"> <span id="LC480" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetFoldUFM here because the operation</span></span>
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<pre style="margin: 0;"> <span id="LC481" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- is commutative</span></span>
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<pre style="margin: 0;"> <span id="LC482" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">nodeCoalesce</span> <span class="n" style="color: #333;">node</span></span>
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