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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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<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fa1d67f121cf813dfd7b3e155b8b301e5f9eaeff">fa1d67f1</a></strong>
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<span>by Simon Jakobi</span>
<i>at 2020-03-31T03:02:51+02:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Delete some evidence bindings more efficiently
(needs refactoring)
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<h4>6 changed files:</h4>
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<li class="file-stats">
<a href="#266bc13b57ed8c43a461b6d9a429c917879e16b4">
compiler/GHC/Types/Unique/DFM.hs
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<li class="file-stats">
<a href="#b0b25f424f682f899323d3f74070dbe8fd59628e">
compiler/GHC/Types/Unique/FM.hs
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<li class="file-stats">
<a href="#71ee8226465c3f394f18d0bddd00077942947740">
compiler/GHC/Types/Unique/Set.hs
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<li class="file-stats">
<a href="#07e36027465263e8b90313979f12e1f4a9ce64a5">
compiler/GHC/Types/Var/Env.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="#75d517f701402b106e4d98d255eb24b57ba72aab">
compiler/typecheck/TcSimplify.hs
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<h4>Changes:</h4>
<li id="266bc13b57ed8c43a461b6d9a429c917879e16b4">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fa1d67f121cf813dfd7b3e155b8b301e5f9eaeff#266bc13b57ed8c43a461b6d9a429c917879e16b4"><strong>compiler/GHC/Types/Unique/DFM.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">@@ -50,7 +50,7 @@ module GHC.Types.Unique.DFM (</td>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">equalKeysUDFM</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">minusUDFM</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">listToUDFM</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC53" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">udfmMinusUFM</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC53" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">udfmMinusUFM</span><span class="p">,</span><span class="idiff left"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">ufmMinusUDFM</span></span><span class="p"><span class="idiff right">,</span></span></span>
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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">partitionUDFM</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">anyUDFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">allUDFM</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">pprUniqDFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pprUDFM</span><span class="p">,</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="73" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="73" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -73,7 +73,7 @@ import Data.Functor.Classes (Eq1 (..))</td>
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<pre style="margin: 0;"> <span id="LC73" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">sortBy</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Function</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">on</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC75" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">Data.Semigroup</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">Semi</span></span>
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<pre style="margin: 0;">-<span id="LC76" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.FM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UniqFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">listToUFM_Directly</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetUFMToList</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">ufmToIntMap</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC76" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.FM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UniqFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">listToUFM_Directly</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetUFMToList</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">ufmToIntMap</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 right">intMapToUFM</span></span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"></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;">-- Note [Deterministic UniqFM]</span></span>
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<pre style="margin: 0;"> <span id="LC79" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="343" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -343,6 +343,9 @@ udfmMinusUFM (UDFM x i) y = UDFM (M.difference x (ufmToIntMap y)) i</td>
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<pre style="margin: 0;"> <span id="LC343" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- M.difference returns a subset of a left set, so `i` is a good upper</span></span>
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<pre style="margin: 0;"> <span id="LC344" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- bound.</span></span>
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<pre style="margin: 0;"> <span id="LC345" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC346" class="line" lang="haskell"><span class="n" style="color: #333;">ufmMinusUDFM</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;">elt1</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UniqDFM</span> <span class="n" style="color: #333;">elt2</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;">elt1</span></span>
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<pre style="margin: 0;">+<span id="LC347" class="line" lang="haskell"><span class="n" style="color: #333;">ufmMinusUDFM</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UDFM</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">_i</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">intMapToUFM</span> <span class="p">(</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;">difference</span> <span class="p">(</span><span class="n" style="color: #333;">ufmToIntMap</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">y</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC348" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC349" class="line" lang="haskell"><span class="cd">-- | Partition UniqDFM into two UniqDFMs according to the predicate</span></span>
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<pre style="margin: 0;"> <span id="LC350" class="line" lang="haskell"><span class="n" style="color: #333;">partitionUDFM</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="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;">UniqDFM</span> <span class="n" style="color: #333;">elt</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UniqDFM</span> <span class="n" style="color: #333;">elt</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">UniqDFM</span> <span class="n" style="color: #333;">elt</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC351" class="line" lang="haskell"><span class="n" style="color: #333;">partitionUDFM</span> <span class="n" style="color: #333;">p</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UDFM</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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<li id="b0b25f424f682f899323d3f74070dbe8fd59628e">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fa1d67f121cf813dfd7b3e155b8b301e5f9eaeff#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">@@ -67,7 +67,7 @@ module GHC.Types.Unique.FM (</td>
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">lookupWithDefaultUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lookupWithDefaultUFM_Directly</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nonDetEltsUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">eltsUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetKeysUFM</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">ufmToSet_Directly</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC70" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nonDetUFMToList</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">ufmToIntMap</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC70" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nonDetUFMToList</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">ufmToIntMap</span><span class="p">,</span><span class="idiff left"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">intMapToUFM</span></span><span class="p"><span class="idiff right">,</span></span></span>
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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">pprUniqFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pprUFM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pprUFMWithKeys</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pluralUFM</span></span>
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<pre style="margin: 0;"> <span id="LC72" 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="LC73" 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">@@ -359,6 +359,9 @@ instance Traversable NonDetUniqFM where</td>
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<pre style="margin: 0;"> <span id="LC359" class="line" lang="haskell"><span class="n" style="color: #333;">ufmToIntMap</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="kt" style="color: #458; font-weight: 600;">M</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">IntMap</span> <span class="n" style="color: #333;">elt</span></span>
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<pre style="margin: 0;"> <span id="LC360" class="line" lang="haskell"><span class="n" style="color: #333;">ufmToIntMap</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="n" style="color: #333;">m</span></span>
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<pre style="margin: 0;"> <span id="LC361" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC362" class="line" lang="haskell"><span class="n" style="color: #333;">intMapToUFM</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="kt" style="color: #458; font-weight: 600;">IntMap</span> <span class="n" style="color: #333;">elt</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>
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<pre style="margin: 0;">+<span id="LC363" class="line" lang="haskell"><span class="n" style="color: #333;">intMapToUFM</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UFM</span></span>
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<pre style="margin: 0;">+<span id="LC364" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC365" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Determines whether two 'UniqFM's contain the same keys.</span></span>
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<pre style="margin: 0;"> <span id="LC366" class="line" lang="haskell"><span class="n" style="color: #333;">equalKeysUFM</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;">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;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;"> <span id="LC367" class="line" lang="haskell"><span class="n" style="color: #333;">equalKeysUFM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UFM</span> <span class="n" style="color: #333;">m1</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UFM</span> <span class="n" style="color: #333;">m2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">liftEq</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">)</span> <span class="n" style="color: #333;">m1</span> <span class="n" style="color: #333;">m2</span></span>
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<li id="71ee8226465c3f394f18d0bddd00077942947740">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fa1d67f121cf813dfd7b3e155b8b301e5f9eaeff#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">@@ -25,7 +25,7 @@ module GHC.Types.Unique.Set (</td>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">delOneFromUniqSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">delOneFromUniqSet_Directly</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">delListFromUniqSet</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">delListFromUniqSet_Directly</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">unionUniqSets</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">unionManyUniqSets</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC28" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">minusUniqSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">uniqSetMinusUFM</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">minusUniqSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">uniqSetMinusUFM</span><span class="p">,</span><span class="idiff left"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">uniqSetMinusUDFM</span></span><span class="p"><span class="idiff right">,</span></span></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">intersectUniqSets</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">restrictUniqSetToUFM</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">uniqSetAny</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">uniqSetAll</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">@@ -48,6 +48,7 @@ module GHC.Types.Unique.Set (</td>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GhcPrelude</span></span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.DFM</span></span>
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.FM</span></span>
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique</span></span>
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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Coerce</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">@@ -111,6 +112,9 @@ restrictUniqSetToUFM (UniqSet s) m = UniqSet (intersectUFM s m)</td>
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<pre style="margin: 0;"> <span id="LC112" class="line" lang="haskell"><span class="n" style="color: #333;">uniqSetMinusUFM</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;">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;">b</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;">a</span></span>
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<pre style="margin: 0;"> <span id="LC113" class="line" lang="haskell"><span class="n" style="color: #333;">uniqSetMinusUFM</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="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UniqSet</span> <span class="p">(</span><span class="n" style="color: #333;">minusUFM</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">t</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC114" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC115" class="line" lang="haskell"><span class="n" style="color: #333;">uniqSetMinusUDFM</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;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UniqDFM</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UniqSet</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell"><span class="n" style="color: #333;">uniqSetMinusUDFM</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="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UniqSet</span> <span class="p">(</span><span class="n" style="color: #333;">ufmMinusUDFM</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">t</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC117" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC118" class="line" lang="haskell"><span class="n" style="color: #333;">elementOfUniqSet</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Uniquable</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UniqSet</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;">Bool</span></span>
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<pre style="margin: 0;"> <span id="LC119" class="line" lang="haskell"><span class="n" style="color: #333;">elementOfUniqSet</span> <span class="n" style="color: #333;">a</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;">elemUFM</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">s</span></span>
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<pre style="margin: 0;"> <span id="LC120" class="line" lang="haskell"></span>
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<li id="07e36027465263e8b90313979f12e1f4a9ce64a5">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fa1d67f121cf813dfd7b3e155b8b301e5f9eaeff#07e36027465263e8b90313979f12e1f4a9ce64a5"><strong>compiler/GHC/Types/Var/Env.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -33,7 +33,7 @@ module GHC.Types.Var.Env (</td>
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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">extendDVarEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">extendDVarEnv_C</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC34" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">extendDVarEnvList</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC35" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">lookupDVarEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">elemDVarEnv</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC36" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isEmptyDVarEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">foldDVarEnv</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isEmptyDVarEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">foldDVarEnv</span><span class="p">,</span><span class="idiff left"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">nonDetStrictFoldDVarEnv</span></span><span class="p"><span class="idiff right">,</span></span></span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mapDVarEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">filterDVarEnv</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC38" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">modifyDVarEnv</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC39" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">alterDVarEnv</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">@@ -583,6 +583,9 @@ lookupDVarEnv = lookupUDFM</td>
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<pre style="margin: 0;"> <span id="LC583" class="line" lang="haskell"><span class="n" style="color: #333;">foldDVarEnv</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;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DVarEnv</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span></span>
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<pre style="margin: 0;"> <span id="LC584" class="line" lang="haskell"><span class="n" style="color: #333;">foldDVarEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldUDFM</span></span>
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<pre style="margin: 0;"> <span id="LC585" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC586" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetStrictFoldDVarEnv</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DVarEnv</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span></span>
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<pre style="margin: 0;">+<span id="LC587" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetStrictFoldDVarEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetStrictFoldUDFM</span></span>
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<pre style="margin: 0;">+<span id="LC588" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC589" class="line" lang="haskell"><span class="n" style="color: #333;">mapDVarEnv</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;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DVarEnv</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;">DVarEnv</span> <span class="n" style="color: #333;">b</span></span>
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<pre style="margin: 0;"> <span id="LC590" class="line" lang="haskell"><span class="n" style="color: #333;">mapDVarEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapUDFM</span></span>
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<pre style="margin: 0;"> <span id="LC591" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fa1d67f121cf813dfd7b3e155b8b301e5f9eaeff#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">@@ -15,7 +15,9 @@ module TcEvidence (</td>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * Evidence bindings</span></span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">TcEvBinds</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">EvBindsVar</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">EvBindMap</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">emptyEvBindMap</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">extendEvBinds</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC18" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">lookupEvBind</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">evBindMapBinds</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">foldEvBindMap</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">filterEvBindMap</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">lookupEvBind</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">evBindMapBinds</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">foldEvBindMap</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetStrictFoldEvBindMap</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">filterEvBindMap</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isEmptyEvBindMap</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">EvBind</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">emptyTcEvBinds</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isEmptyTcEvBinds</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkGivenEvBind</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkWantedEvBind</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">evBindVar</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isCoEvBindsVar</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">@@ -496,6 +498,9 @@ evBindMapBinds = foldEvBindMap consBag emptyBag</td>
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<pre style="margin: 0;"> <span id="LC498" class="line" lang="haskell"><span class="n" style="color: #333;">foldEvBindMap</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EvBind</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;">EvBindMap</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="LC499" class="line" lang="haskell"><span class="n" style="color: #333;">foldEvBindMap</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">z</span> <span class="n" style="color: #333;">bs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldDVarEnv</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">z</span> <span class="p">(</span><span class="n" style="color: #333;">ev_bind_varenv</span> <span class="n" style="color: #333;">bs</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC500" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC501" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetStrictFoldEvBindMap</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">EvBind</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;">EvBindMap</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="LC502" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetStrictFoldEvBindMap</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">z</span> <span class="n" style="color: #333;">bs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetStrictFoldDVarEnv</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">z</span> <span class="p">(</span><span class="n" style="color: #333;">ev_bind_varenv</span> <span class="n" style="color: #333;">bs</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC503" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC504" class="line" lang="haskell"><span class="n" style="color: #333;">filterEvBindMap</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EvBind</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;">EvBindMap</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">EvBindMap</span></span>
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<pre style="margin: 0;"> <span id="LC505" class="line" lang="haskell"><span class="n" style="color: #333;">filterEvBindMap</span> <span class="n" style="color: #333;">k</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EvBindMap</span> <span class="p">{</span> <span class="n" style="color: #333;">ev_bind_varenv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</span> <span class="p">})</span></span>
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<pre style="margin: 0;"> <span id="LC506" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EvBindMap</span> <span class="p">{</span> <span class="n" style="color: #333;">ev_bind_varenv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">filterDVarEnv</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">env</span> <span class="p">}</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/fa1d67f121cf813dfd7b3e155b8b301e5f9eaeff#75d517f701402b106e4d98d255eb24b57ba72aab"><strong>compiler/typecheck/TcSimplify.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">@@ -1862,11 +1862,11 @@ neededEvVars implic@(Implic { ic_given = givens</td>
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<pre style="margin: 0;"> <span id="LC1862" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tcvs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kt" style="color: #458; font-weight: 600;">TcS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">getTcEvTyCoVars</span> <span class="n" style="color: #333;">ev_binds_var</span></span>
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<pre style="margin: 0;"> <span id="LC1863" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1864" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">seeds1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">add_implic_seeds</span> <span class="n" style="color: #333;">old_needs</span> <span class="n" style="color: #333;">implics</span></span>
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<pre style="margin: 0;">-<span id="LC1865" class="line" lang="haskell"> <span class="n" style="color: #333;">seeds2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldEvBindMap</span> <span class="n" style="color: #333;">add_wanted</span> <span class="n" style="color: #333;">seeds1</span> <span class="n" style="color: #333;">ev_binds</span></span>
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<pre style="margin: 0;">+<span id="LC1865" class="line" lang="haskell"> <span class="n" style="color: #333;">seeds2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldEvBindMap</span> <span class="n" style="color: #333;">add_wanted</span> <span class="n" style="color: #333;">seeds1</span> <span class="n" style="color: #333;">ev_binds</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="LC1866" class="line" lang="haskell"> <span class="n" style="color: #333;">seeds3</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">seeds2</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">tcvs</span></span>
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<pre style="margin: 0;"> <span id="LC1867" class="line" lang="haskell"> <span class="n" style="color: #333;">need_inner</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">findNeededEvVars</span> <span class="n" style="color: #333;">ev_binds</span> <span class="n" style="color: #333;">seeds3</span></span>
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<pre style="margin: 0;"> <span id="LC1868" class="line" lang="haskell"> <span class="n" style="color: #333;">live_ev_binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">filterEvBindMap</span> <span class="p">(</span><span class="n" style="color: #333;">needed_ev_bind</span> <span class="n" style="color: #333;">need_inner</span><span class="p">)</span> <span class="n" style="color: #333;">ev_binds</span></span>
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<pre style="margin: 0;">-<span id="LC1869" class="line" lang="haskell"> <span class="n" style="color: #333;">need_outer</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">foldEvBindMap</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">del_ev_bndr</span></span> <span class="n" style="color: #333;">need_inner</span> <span class="n" style="color: #333;">live_ev_binds</span></span>
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<pre style="margin: 0;">+<span id="LC1869" class="line" lang="haskell"> <span class="n" style="color: #333;">need_outer</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">varSetMinusEvBindMap</span></span> <span class="n" style="color: #333;">need_inner</span> <span class="n" style="color: #333;">live_ev_binds</span></span>
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<pre style="margin: 0;"> <span id="LC1870" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">delVarSetList</span><span class="p">`</span> <span class="n" style="color: #333;">givens</span></span>
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<pre style="margin: 0;"> <span id="LC1871" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1872" class="line" lang="haskell"> <span class="p">;</span> <span class="kt" style="color: #458; font-weight: 600;">TcS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">setTcEvBindsMap</span> <span class="n" style="color: #333;">ev_binds_var</span> <span class="n" style="color: #333;">live_ev_binds</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">@@ -1890,8 +1890,8 @@ neededEvVars implic@(Implic { ic_given = givens</td>
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<pre style="margin: 0;"> <span id="LC1890" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">is_given</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ev_var</span> <span class="p">`</span><span class="n" style="color: #333;">elemVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">needed</span></span>
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<pre style="margin: 0;"> <span id="LC1891" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="c1" style="color: #998; font-style: italic;">-- Keep all wanted bindings</span></span>
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<pre style="margin: 0;"> <span id="LC1892" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC1893" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">del_ev_bndr</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">EvBind</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">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="LC1894" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">del_ev_bndr</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">EvBind</span></span><span class="idiff"> </span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">eb_lhs</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">v</span></span><span class="idiff"> </span><span class="p"><span class="idiff">})</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">needs</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">delVarSet</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">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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<pre style="margin: 0;">+<span id="LC1893" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">varSetMinusEvBindMap</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">VarSet</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">EvBindMap</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="LC1894" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">varSetMinusEvBindMap</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ebm</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">uniqSetMinusUDFM</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vs</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">ev_bind_varenv</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ebm</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;"> <span id="LC1895" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1896" class="line" lang="haskell"> <span class="n" style="color: #333;">add_wanted</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">EvBind</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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<pre style="margin: 0;"> <span id="LC1897" class="line" lang="haskell"> <span class="n" style="color: #333;">add_wanted</span> <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="n" style="color: #333;">needs</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">@@ -2381,7 +2381,7 @@ floatEqualities skols given_ids ev_binds_var no_given_eqs</td>
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<pre style="margin: 0;"> <span id="LC2381" class="line" lang="haskell"> <span class="n" style="color: #333;">seed_skols</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVarSet</span> <span class="n" style="color: #333;">skols</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span></span>
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<pre style="margin: 0;"> <span id="LC2382" class="line" lang="haskell"> <span class="n" style="color: #333;">mkVarSet</span> <span class="n" style="color: #333;">given_ids</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span></span>
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<pre style="margin: 0;"> <span id="LC2383" class="line" lang="haskell"> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">add_non_flt_ct</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">no_float_cts</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span></span>
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<pre style="margin: 0;">-<span id="LC2384" class="line" lang="haskell"> <span class="n" style="color: #333;">foldEvBindMap</span> <span class="n" style="color: #333;">add_one_bind</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">binds</span></span>
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<pre style="margin: 0;">+<span id="LC2384" class="line" lang="haskell"> <span class="n" style="color: #333;">foldEvBindMap</span> <span class="n" style="color: #333;">add_one_bind</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">binds</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="LC2385" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- seed_skols: See Note [What prevents a constraint from floating] (1,2,3)</span></span>
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<pre style="margin: 0;"> <span id="LC2386" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Include the EvIds of any non-floating constraints</span></span>
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<pre style="margin: 0;"> <span id="LC2387" class="line" lang="haskell"></span>
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