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<h3>
Simon Jakobi pushed to branch wip/T16806
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a880b6c6b85d2c23c2adef1068c23d475bc235e">7a880b6c</a></strong>
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<span>by Simon Jakobi</span>
<i>at 2020-03-31T18:27:00+02:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Clarify disjoint in closureGrowth
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<h4>2 changed files:</h4>
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<a href="#657eec52eed3c8be846a0b60eb6088d5f465de8a">
compiler/GHC/Stg/Lift/Analysis.hs
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<a href="#8fa3c53ff1558af938c045405b5e177c50e91308">
compiler/GHC/Types/Var/Set.hs
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<h4>Changes:</h4>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a880b6c6b85d2c23c2adef1068c23d475bc235e#657eec52eed3c8be846a0b60eb6088d5f465de8a"><strong>compiler/GHC/Stg/Lift/Analysis.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">@@ -533,7 +533,7 @@ closureGrowth expander sizer group abs_ids = go</td>
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<pre style="margin: 0;"> <span id="LC533" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ClosureSk</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">clo_fvs</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC534" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- If no binder of the @group@ occurs free in the closure, the lifting</span></span>
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<pre style="margin: 0;"> <span id="LC535" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- won't have any effect on it and we can omit the recursive call.</span></span>
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<pre style="margin: 0;">-<span id="LC536" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;"><span class="idiff left">dVarSetDisjointVarSet</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">clo_fvs'</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">group</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;">+<span id="LC536" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;"><span class="idiff left">group</span></span><span class="idiff"> </span><span class="p"><span class="idiff">`</span></span><span class="n" style="color: #333;"><span class="idiff">varSetDisjointDVarSet</span></span><span class="p"><span class="idiff">`</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">clo_fvs'</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;"> <span id="LC537" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Otherwise, we account the cost of allocating the closure and add it to</span></span>
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<pre style="margin: 0;"> <span id="LC538" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- the closure growth of its RHS.</span></span>
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<pre style="margin: 0;"> <span id="LC539" 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;">mkIntWithInf</span> <span class="n" style="color: #333;">cost</span> <span class="o" style="font-weight: 600;">+</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">rhs</span></span>
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<li id="8fa3c53ff1558af938c045405b5e177c50e91308">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a880b6c6b85d2c23c2adef1068c23d475bc235e#8fa3c53ff1558af938c045405b5e177c50e91308"><strong>compiler/GHC/Types/Var/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">@@ -34,7 +34,7 @@ module GHC.Types.Var.Set (</td>
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<pre style="margin: 0;"> <span id="LC34" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">elemDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">dVarSetElems</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">subDVarSet</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;">unionDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">unionDVarSets</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mapUnionDVarSet</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;">intersectDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">dVarSetIntersectVarSet</span><span class="p">,</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;">intersectsDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">disjointDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;"><span class="idiff left right">dVarSetDisjoint</span>VarSet</span><span class="p">,</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;">intersectsDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">disjointDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;"><span class="idiff left right">varSetDisjointD</span>VarSet</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;">isEmptyDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">delDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">delDVarSetList</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;">minusDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">foldDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">filterDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mapDVarSet</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC40" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">dVarSetMinusVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">anyDVarSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">allDVarSet</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">@@ -274,8 +274,8 @@ dVarSetIntersectVarSet = uniqDSetIntersectUniqSet</td>
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<pre style="margin: 0;"> <span id="LC274" class="line" lang="haskell"><span class="n" style="color: #333;">disjointDVarSet</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;">DVarSet</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="LC275" class="line" lang="haskell"><span class="n" style="color: #333;">disjointDVarSet</span> <span class="n" style="color: #333;">s1</span> <span class="n" style="color: #333;">s2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">disjointUDFM</span> <span class="p">(</span><span class="n" style="color: #333;">getUniqDSet</span> <span class="n" style="color: #333;">s1</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">getUniqDSet</span> <span class="n" style="color: #333;">s2</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC276" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC277" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left">dVarSetDisjointVarSet</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">DVarSet</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff right"> </span><span class="kt" style="color: #458; font-weight: 600;">VarSet</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="LC278" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left">dVarSetDisjointVarSet</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">uniqDSetDisjointUniqSet</span></span></span>
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<pre style="margin: 0;">+<span id="LC277" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left">varSetDisjointDVarSet</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">D</span>VarSet</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="LC278" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left">varSetDisjointDVarSet</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">dvs</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">uniqDSetDisjointUniqSet</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dvs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">vs</span></span></span>
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<pre style="margin: 0;"> <span id="LC279" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC280" class="line" lang="haskell"><span class="cd">-- | True if non-empty intersection</span></span>
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<pre style="margin: 0;"> <span id="LC281" class="line" lang="haskell"><span class="n" style="color: #333;">intersectsDVarSet</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;">DVarSet</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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