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<h3>
Sebastian Graf pushed to branch wip/T18894
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/87c15c1ad42fe808bbd8e8bda15f9a8e5314fc04">87c15c1a</a></strong>
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<span>by Sebastian Graf</span>
<i>at 2020-11-24T00:03:18+01:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix a bug regarding recursive lazy_fvs
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<h4>2 changed files:</h4>
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<a href="#8104fa1b71db6cfc4eb90cd769463d9eb9004619">
compiler/GHC/Core/Opt/DmdAnal.hs
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compiler/GHC/Core/Opt/Pipeline.hs
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<h4>Changes:</h4>
<li id="8104fa1b71db6cfc4eb90cd769463d9eb9004619">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/87c15c1ad42fe808bbd8e8bda15f9a8e5314fc04#8104fa1b71db6cfc4eb90cd769463d9eb9004619"><strong>compiler/GHC/Core/Opt/DmdAnal.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">@@ -65,32 +65,41 @@ data DmdAnalOpts = DmdAnalOpts</td>
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<pre style="margin: 0;"> <span id="LC65" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<pre style="margin: 0;"> <span id="LC66" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note: use `seqBinds` on the result to avoid leaks due to lazyness (cf Note</span></span>
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- [Stamp out space leaks in demand analysis])</span></span>
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<pre style="margin: 0;">-<span id="LC68" class="line" lang="haskell"><span class="n" style="color: #333;">dmdAnalProgram</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DmdAnalOpts</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FamInstEnvs</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span></span>
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<pre style="margin: 0;">-<span id="LC69" class="line" lang="haskell"><span class="n" style="color: #333;">dmdAnalProgram</span> <span class="n" style="color: #333;">opts</span> <span class="n" style="color: #333;">fam_envs</span> <span class="n" style="color: #333;">binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">binds_plus_dmds</span></span>
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<pre style="margin: 0;">+<span id="LC68" class="line" lang="haskell"><span class="n" style="color: #333;">dmdAnalProgram</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DmdAnalOpts</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FamInstEnvs</span> <span class="o" style="font-weight: 600;">-></span> <span class="p"><span class="idiff left">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreRule</span></span><span class="p"><span class="idiff">]</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;">CoreProgram</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span></span>
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<pre style="margin: 0;">+<span id="LC69" class="line" lang="haskell"><span class="n" style="color: #333;">dmdAnalProgram</span> <span class="n" style="color: #333;">opts</span> <span class="n" style="color: #333;">fam_envs</span> <span class="n" style="color: #333;"><span class="idiff left">rules</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">binds_plus_dmds</span></span>
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell"> <span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyAnalEnv</span> <span class="n" style="color: #333;">opts</span> <span class="n" style="color: #333;">fam_envs</span></span>
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<pre style="margin: 0;">+<span id="LC72" class="line" lang="haskell"> <span class="n" style="color: #333;">rule_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="p">(</span><span class="n" style="color: #333;">unionVarSet</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">ruleRhsFreeIds</span><span class="p">)</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">rules</span></span>
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<pre style="margin: 0;"> <span id="LC73" class="line" lang="haskell"> <span class="n" style="color: #333;">binds_plus_dmds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">snd</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">nopDmdType</span> <span class="n" style="color: #333;">binds</span></span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC75" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">dmd_ty</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">dmd_ty</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC76" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dmd_ty</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;">bs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">b</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">rhs</span></span>
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<pre style="margin: 0;">-<span id="LC77" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">lazy_fvs</span><span class="p">,</span> <span class="n" style="color: #333;">id'</span><span class="p">,</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;">dmdAnalRhsLetDown</span> <span class="kt" style="color: #458; font-weight: 600;">TopLevel</span> <span class="kt" style="color: #458; font-weight: 600;">No<span class="idiff left right">thing</span></span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">topSubDmd</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">rhs</span></span>
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<pre style="margin: 0;">+<span id="LC78" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">lazy_fvs</span><span class="p">,</span> <span class="n" style="color: #333;">id'</span><span class="p">,</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;">dmdAnalRhsLetDown</span> <span class="kt" style="color: #458; font-weight: 600;">TopLevel</span> <span class="kt" style="color: #458; font-weight: 600;">No<span class="idiff left right">nRecursive</span></span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">topSubDmd</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">rhs</span></span>
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<pre style="margin: 0;"> <span id="LC79" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">dmd_ty'</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">env'</span> <span class="p">(</span><span class="n" style="color: #333;">add_exported_use</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">dmd_ty</span> <span class="n" style="color: #333;">id'</span><span class="p">)</span> <span class="n" style="color: #333;">bs</span></span>
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<pre style="margin: 0;"> <span id="LC80" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">dmd_ty''</span><span class="p">,</span> <span class="n" style="color: #333;">id_dmd</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">findBndrDmd</span> <span class="n" style="color: #333;">env'</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="p">(</span><span class="n" style="color: #333;">dmd_ty'</span> <span class="p">`</span><span class="n" style="color: #333;">addLazyFVs</span><span class="p">`</span> <span class="n" style="color: #333;">lazy_fvs</span><span class="p">)</span> <span class="n" style="color: #333;">id'</span></span>
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<pre style="margin: 0;">-<span id="LC80" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">id''</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">id'</span></span><span class="idiff"> </span><span class="p"><span class="idiff">`</span></span><span class="n" style="color: #333;"><span class="idiff">setIdDemandInfo</span></span><span class="p"><span class="idiff">`</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">if</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">isInterestingTopLevelFn</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">id'</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">then</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">id_dmd</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">else</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">topD</span>md</span></span>
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<pre style="margin: 0;">+<span id="LC81" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">id''</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">annotate_id_dmd</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">id'</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">id_d</span>md</span></span>
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<pre style="margin: 0;"> <span id="LC82" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">dmd_ty''</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">id''</span> <span class="n" style="color: #333;">rhs'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bs'</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC83" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Rec</span> <span class="n" style="color: #333;">pairs</span></span>
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83
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84
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<pre style="margin: 0;"> <span id="LC84" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">lazy_fvs</span><span class="p">,</span> <span class="n" style="color: #333;">pairs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">dmdFix</span> <span class="kt" style="color: #458; font-weight: 600;">TopLevel</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">topSubDmd</span> <span class="n" style="color: #333;">pairs</span></span>
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<pre style="margin: 0;"> <span id="LC85" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ids'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">pairs'</span></span>
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<pre style="margin: 0;"> <span id="LC86" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">dmd_ty'</span><span class="p">,</span> <span class="n" style="color: #333;">bs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">env'</span> <span class="p">(</span><span class="n" style="color: #333;">add_exported_uses</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">dmd_ty</span> <span class="n" style="color: #333;">ids'</span><span class="p">)</span> <span class="n" style="color: #333;">bs</span></span>
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<pre style="margin: 0;"> <span id="LC87" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">dmd_ty''</span><span class="p">,</span> <span class="n" style="color: #333;">id_dmds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">findBndrsDmds</span> <span class="n" style="color: #333;">env'</span> <span class="p">(</span><span class="n" style="color: #333;">dmd_ty'</span> <span class="p">`</span><span class="n" style="color: #333;">addLazyFVs</span><span class="p">`</span> <span class="n" style="color: #333;">lazy_fvs</span><span class="p">)</span> <span class="n" style="color: #333;">ids'</span></span>
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<pre style="margin: 0;">-<span id="LC87" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ids''</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">zipWith</span> <span class="p"><span class="idiff left">(</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">id'</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">id_dmd</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">id'</span></span><span class="idiff"> </span><span class="p"><span class="idiff">`</span></span><span class="n" style="color: #333;"><span class="idiff">setIdDemandInfo</span></span><span class="p"><span class="idiff">`</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">if</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">isInterestingTopLevelFn</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">id'</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">then</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">id_dmd</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">else</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">topDmd</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">ids'</span> <span class="n" style="color: #333;">id_dmds</span></span>
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<pre style="margin: 0;">+<span id="LC88" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ids''</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">zipWith</span> <span class="n" style="color: #333;"><span class="idiff left right">annotate_id_dmd</span></span> <span class="n" style="color: #333;">ids'</span> <span class="n" style="color: #333;">id_dmds</span></span>
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88
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89
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<pre style="margin: 0;"> <span id="LC89" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">pairs''</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">zipWith</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">id''</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">rhs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">id''</span><span class="p">,</span> <span class="n" style="color: #333;">rhs'</span><span class="p">))</span> <span class="n" style="color: #333;">ids''</span> <span class="n" style="color: #333;">pairs'</span></span>
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90
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<pre style="margin: 0;"> <span id="LC90" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">dmd_ty''</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Rec</span> <span class="n" style="color: #333;">pairs''</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">bs'</span><span class="p">)</span></span>
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91
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<pre style="margin: 0;"> <span id="LC91" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC92" class="line" lang="haskell"> <span class="n" style="color: #333;">annotate_id_dmd</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">dmd</span></span>
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<pre style="margin: 0;">+<span id="LC93" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isInterestingTopLevelFn</span> <span class="n" style="color: #333;">id</span><span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">id</span> <span class="p">`</span><span class="n" style="color: #333;">elemVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">rule_fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC94" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Absence analysis for stable unfoldings and RULES]</span></span>
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<pre style="margin: 0;">+<span id="LC95" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">id</span> <span class="p">`</span><span class="n" style="color: #333;">setIdDemandInfo</span><span class="p">`</span> <span class="n" style="color: #333;">dmd</span></span>
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<pre style="margin: 0;">+<span id="LC96" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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<pre style="margin: 0;">+<span id="LC97" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">id</span> <span class="p">`</span><span class="n" style="color: #333;">setIdDemandInfo</span><span class="p">`</span> <span class="n" style="color: #333;">topDmd</span></span>
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<pre style="margin: 0;">+<span id="LC98" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC99" class="line" lang="haskell"> <span class="n" style="color: #333;">add_exported_uses</span> <span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldl'</span> <span class="p">(</span><span class="n" style="color: #333;">add_exported_use</span> <span class="n" style="color: #333;">env</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC100" class="line" lang="haskell"> <span class="n" style="color: #333;">add_exported_use</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dmd_ty</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">-<span id="LC93" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isExportedId</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dmd_ty</span> <span class="p">`</span><span class="n" style="color: #333;">plusDmdType</span><span class="p">`</span> <span class="n" style="color: #333;">fst</span> <span class="p">(</span><span class="n" style="color: #333;">dmdAnalStar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">topDmd</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">id</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC101" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isExportedId</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isInterestingTopLevelFn</span> <span class="n" style="color: #333;">id</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC102" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dmd_ty</span> <span class="p">`</span><span class="n" style="color: #333;">plusDmdType</span><span class="p">`</span> <span class="n" style="color: #333;">fst</span> <span class="p">(</span><span class="n" style="color: #333;">dmdAnalStar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">topDmd</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">id</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC103" 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;">dmd_ty</span></span>
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<pre style="margin: 0;"> <span id="LC104" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC105" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Stamp out space leaks in demand analysis]</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">@@ -326,7 +335,7 @@ dmdAnal' env dmd (Let (NonRec id rhs) body)</td>
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<pre style="margin: 0;"> <span id="LC335" class="line" lang="haskell"><span class="n" style="color: #333;">dmdAnal'</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dmd</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Let</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span> <span class="n" style="color: #333;">body</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC336" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">body_ty2</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Let</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">id2</span> <span class="n" style="color: #333;">rhs'</span><span class="p">)</span> <span class="n" style="color: #333;">body'</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC337" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC329" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">env1</span><span class="p">,</span> <span class="n" style="color: #333;">lazy_fv</span><span class="p">,</span> <span class="n" style="color: #333;">id1</span><span class="p">,</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;">dmdAnalRhsLetDown</span> <span class="kt" style="color: #458; font-weight: 600;">NotTopLevel</span> <span class="kt" style="color: #458; font-weight: 600;">No<span class="idiff left right">thing</span></span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dmd</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">rhs</span></span>
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<pre style="margin: 0;">+<span id="LC338" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">env1</span><span class="p">,</span> <span class="n" style="color: #333;">lazy_fv</span><span class="p">,</span> <span class="n" style="color: #333;">id1</span><span class="p">,</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;">dmdAnalRhsLetDown</span> <span class="kt" style="color: #458; font-weight: 600;">NotTopLevel</span> <span class="kt" style="color: #458; font-weight: 600;">No<span class="idiff left right">nRecursive</span></span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dmd</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">rhs</span></span>
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330
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339
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<pre style="margin: 0;"> <span id="LC339" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">body_ty</span><span class="p">,</span> <span class="n" style="color: #333;">body'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dmdAnal</span> <span class="n" style="color: #333;">env1</span> <span class="n" style="color: #333;">dmd</span> <span class="n" style="color: #333;">body</span></span>
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331
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340
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<pre style="margin: 0;"> <span id="LC340" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">body_ty1</span><span class="p">,</span> <span class="n" style="color: #333;">id2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">annotateBndr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">body_ty</span> <span class="n" style="color: #333;">id1</span></span>
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332
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341
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<pre style="margin: 0;"> <span id="LC341" class="line" lang="haskell"> <span class="n" style="color: #333;">body_ty2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addLazyFVs</span> <span class="n" style="color: #333;">body_ty1</span> <span class="n" style="color: #333;">lazy_fv</span> <span class="c1" style="color: #998; font-style: italic;">-- see Note [Lazy and unleashable free variables]</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="357" 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">@@ -348,8 +357,8 @@ dmdAnal' env dmd (Let (Rec pairs) body)</td>
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348
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357
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<pre style="margin: 0;"> <span id="LC357" 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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349
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358
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<pre style="margin: 0;"> <span id="LC358" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">lazy_fv</span><span class="p">,</span> <span class="n" style="color: #333;">pairs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dmdFix</span> <span class="kt" style="color: #458; font-weight: 600;">NotTopLevel</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">dmd</span> <span class="n" style="color: #333;">pairs</span></span>
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350
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359
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<pre style="margin: 0;"> <span id="LC359" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">body_ty</span><span class="p">,</span> <span class="n" style="color: #333;">body'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dmdAnal</span> <span class="n" style="color: #333;">env'</span> <span class="n" style="color: #333;">dmd</span> <span class="n" style="color: #333;">body</span></span>
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351
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<pre style="margin: 0;">-<span id="LC351" class="line" lang="haskell"> <span class="n" style="color: #333;">body_ty1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">deleteFVs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">body_ty</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">map</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fst</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pairs</span></span><span class="p"><span class="idiff right">)</span></span></span>
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352
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<pre style="margin: 0;">-<span id="LC352" class="line" lang="haskell"> <span class="n" style="color: #333;">body_ty2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">addLazyFVs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">body_ty1</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">lazy_fv</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- see Note [Lazy and unleashable free variables]</span></span></span>
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360
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<pre style="margin: 0;">+<span id="LC360" class="line" lang="haskell"> <span class="n" style="color: #333;">body_ty1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">addLazyFVs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">body_ty</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">lazy_fv</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- see Note [Lazy and unleashable free variables]</span></span></span>
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361
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<pre style="margin: 0;">+<span id="LC361" class="line" lang="haskell"> <span class="n" style="color: #333;">body_ty2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">deleteFVs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">body_ty1</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">map</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fst</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pairs</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- TODO: We could annotate idDemandInfo here</span></span></span>
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353
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362
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<pre style="margin: 0;"> <span id="LC362" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span></span>
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354
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363
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<pre style="margin: 0;"> <span id="LC363" class="line" lang="haskell"> <span class="n" style="color: #333;">body_ty2</span> <span class="p">`</span><span class="n" style="color: #333;">seq</span><span class="p">`</span></span>
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355
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364
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<pre style="margin: 0;"> <span id="LC364" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">body_ty2</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Let</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Rec</span> <span class="n" style="color: #333;">pairs'</span><span class="p">)</span> <span class="n" style="color: #333;">body'</span><span class="p">)</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="574" 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">@@ -565,7 +574,8 @@ strict in |y|.</td>
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565
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574
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<pre style="margin: 0;"> <span id="LC574" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (e.g. called), but aren't interested in whether they were called strictly</span></span>
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566
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575
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<pre style="margin: 0;"> <span id="LC575" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- or not. Other top-level bindings are boring.</span></span>
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567
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576
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<pre style="margin: 0;"> <span id="LC576" class="line" lang="haskell"><span class="n" style="color: #333;">isInterestingTopLevelFn</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">-<span id="LC568" class="line" lang="haskell"><span class="n" style="color: #333;">isInterestingTopLevelFn</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">typeArity</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">id</span><span class="p">)</span> <span class="p">`</span><span class="n" style="color: #333;">lengthExceeds</span><span class="p">`</span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;">+<span id="LC577" class="line" lang="haskell"><span class="n" style="color: #333;">isInterestingTopLevelFn</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC578" class="line" lang="haskell"> <span class="n" style="color: #333;">typeArity</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">id</span><span class="p">)</span> <span class="p">`</span><span class="n" style="color: #333;">lengthExceeds</span><span class="p">`</span> <span class="mi" style="color: #099;">0</span></span>
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579
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<pre style="margin: 0;"> <span id="LC579" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC580" class="line" lang="haskell"><span class="n" style="color: #333;">dmdTransform</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">AnalEnv</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ The strictness environment</span></span>
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<pre style="margin: 0;"> <span id="LC581" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ The function</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">@@ -630,7 +640,7 @@ dmdTransform env var dmd</td>
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<pre style="margin: 0;"> <span id="LC640" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This is the LetDown rule in the paper “Higher-Order Cardinality Analysis”.</span></span>
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<pre style="margin: 0;"> <span id="LC641" class="line" lang="haskell"><span class="n" style="color: #333;">dmdAnalRhsLetDown</span></span>
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<pre style="margin: 0;"> <span id="LC642" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TopLevelFlag</span></span>
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<pre style="margin: 0;">-<span id="LC633" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Maybe</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">Id</span></span><span class="p"><span class="idiff">]</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- Just bs <=> recursive, Nothing <=> non-recursive</span></span></span>
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<pre style="margin: 0;">+<span id="LC643" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">RecFlag</span></span></span>
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<pre style="margin: 0;"> <span id="LC644" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">AnalEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SubDemand</span></span>
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<pre style="margin: 0;"> <span id="LC645" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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<pre style="margin: 0;"> <span id="LC646" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">AnalEnv</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">DmdEnv</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -671,8 +681,8 @@ dmdAnalRhsLetDown top_lvl rec_flag env let_dmd id rhs</td>
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<pre style="margin: 0;"> <span id="LC681" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- we'd have to do an additional iteration. reuseEnv makes sure that</span></span>
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<pre style="margin: 0;"> <span id="LC682" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- we never get used-once info for FVs of recursive functions.</span></span>
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<pre style="margin: 0;"> <span id="LC683" class="line" lang="haskell"> <span class="n" style="color: #333;">rhs_fv1</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">rec_flag</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC674" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Just</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">bs</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">reuseEnv</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">delVarEnvList</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rhs_fv</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">bs</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">-<span id="LC675" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">No<span class="idiff left right">thing</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">rhs_fv</span></span>
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<pre style="margin: 0;">+<span id="LC684" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Recursive</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">reuseEnv</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">rhs_fv</span></span></span>
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685
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<pre style="margin: 0;">+<span id="LC685" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">No<span class="idiff left right">nRecursive</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">rhs_fv</span></span>
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686
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<pre style="margin: 0;"> <span id="LC686" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC687" class="line" lang="haskell"> <span class="n" style="color: #333;">rhs_fv2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs_fv1</span> <span class="p">`</span><span class="n" style="color: #333;">keepAliveDmdEnv</span><span class="p">`</span> <span class="n" style="color: #333;">extra_fvs</span></span>
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688
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<pre style="margin: 0;"> <span id="LC688" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Find the RHS free vars of the unfoldings and RULES</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">@@ -952,8 +962,6 @@ dmdFix :: TopLevelFlag</td>
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952
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<pre style="margin: 0;"> <span id="LC962" class="line" lang="haskell"><span class="n" style="color: #333;">dmdFix</span> <span class="n" style="color: #333;">top_lvl</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">let_dmd</span> <span class="n" style="color: #333;">orig_pairs</span></span>
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953
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963
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<pre style="margin: 0;"> <span id="LC963" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">loop</span> <span class="mi" style="color: #099;">1</span> <span class="n" style="color: #333;">initial_pairs</span></span>
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954
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964
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<pre style="margin: 0;"> <span id="LC964" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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955
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<pre style="margin: 0;">-<span id="LC955" class="line" lang="haskell"> <span class="n" style="color: #333;">bndrs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">orig_pairs</span></span>
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956
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<pre style="margin: 0;">-<span id="LC956" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC965" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Initialising strictness]</span></span>
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966
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<pre style="margin: 0;"> <span id="LC966" class="line" lang="haskell"> <span class="n" style="color: #333;">initial_pairs</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">ae_virgin</span> <span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[(</span><span class="n" style="color: #333;">setIdStrictness</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">botSig</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">id</span><span class="p">,</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;">orig_pairs</span> <span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC967" 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;">orig_pairs</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">@@ -1003,7 +1011,7 @@ dmdFix top_lvl env let_dmd orig_pairs</td>
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1003
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<pre style="margin: 0;"> <span id="LC1011" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "my_downRhs" (ppr id $$ ppr (idStrictness id) $$ ppr sig) $</span></span>
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1004
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1012
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<pre style="margin: 0;"> <span id="LC1012" class="line" lang="haskell"> <span class="p">((</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">lazy_fv'</span><span class="p">),</span> <span class="p">(</span><span class="n" style="color: #333;">id'</span><span class="p">,</span> <span class="n" style="color: #333;">rhs'</span><span class="p">))</span></span>
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1005
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1013
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<pre style="margin: 0;"> <span id="LC1013" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1006
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<pre style="margin: 0;">-<span id="LC1006" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">lazy_fv1</span><span class="p">,</span> <span class="n" style="color: #333;">id'</span><span class="p">,</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;">dmdAnalRhsLetDown</span> <span class="n" style="color: #333;">top_lvl</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Just</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">bndrs</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">let_dmd</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">rhs</span></span>
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1014
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<pre style="margin: 0;">+<span id="LC1014" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">env'</span><span class="p">,</span> <span class="n" style="color: #333;">lazy_fv1</span><span class="p">,</span> <span class="n" style="color: #333;">id'</span><span class="p">,</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;">dmdAnalRhsLetDown</span> <span class="n" style="color: #333;">top_lvl</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Recursive</span></span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">let_dmd</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">rhs</span></span>
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1007
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1015
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<pre style="margin: 0;"> <span id="LC1015" class="line" lang="haskell"> <span class="n" style="color: #333;">lazy_fv'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">plusVarEnv_C</span> <span class="n" style="color: #333;">plusDmd</span> <span class="n" style="color: #333;">lazy_fv</span> <span class="n" style="color: #333;">lazy_fv1</span></span>
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<pre style="margin: 0;"> <span id="LC1016" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1017" class="line" lang="haskell"> <span class="n" style="color: #333;">zapIdStrictness</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Id</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Id</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)]</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/87c15c1ad42fe808bbd8e8bda15f9a8e5314fc04#bd153f89bc48f3fd5079b51fb799808aacbd750c"><strong>compiler/GHC/Core/Opt/Pipeline.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">@@ -495,7 +495,7 @@ doCorePass CoreDoExitify = {-# SCC "Exitify" #-}</td>
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<pre style="margin: 0;"> <span id="LC495" class="line" lang="haskell"> <span class="n" style="color: #333;">doPass</span> <span class="n" style="color: #333;">exitifyProgram</span></span>
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496
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<pre style="margin: 0;"> <span id="LC496" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC497" class="line" lang="haskell"><span class="n" style="color: #333;">doCorePass</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoDemand</span> <span class="o" style="font-weight: 600;">=</span> <span class="cp" style="color: #999; font-weight: 600;">{-# SCC "DmdAnal" #-}</span></span>
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<pre style="margin: 0;">-<span id="LC498" class="line" lang="haskell"> <span class="n" style="color: #333;">doPassDFM</span> <span class="n" style="color: #333;">dmdAnal</span></span>
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<pre style="margin: 0;">+<span id="LC498" class="line" lang="haskell"> <span class="n" style="color: #333;">doPassDF<span class="idiff left right">R</span>M</span> <span class="n" style="color: #333;">dmdAnal</span></span>
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<pre style="margin: 0;"> <span id="LC499" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC500" class="line" lang="haskell"><span class="n" style="color: #333;">doCorePass</span> <span class="kt" style="color: #458; font-weight: 600;">CoreDoCpr</span> <span class="o" style="font-weight: 600;">=</span> <span class="cp" style="color: #999; font-weight: 600;">{-# SCC "CprAnal" #-}</span></span>
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<pre style="margin: 0;"> <span id="LC501" class="line" lang="haskell"> <span class="n" style="color: #333;">doPassDFM</span> <span class="n" style="color: #333;">cprAnalProgram</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">@@ -575,6 +575,13 @@ doPassDFM do_pass guts = do</td>
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<pre style="margin: 0;"> <span id="LC575" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">fam_envs</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">p_fam_env</span><span class="p">,</span> <span class="n" style="color: #333;">mg_fam_inst_env</span> <span class="n" style="color: #333;">guts</span><span class="p">)</span></span>
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576
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576
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<pre style="margin: 0;"> <span id="LC576" class="line" lang="haskell"> <span class="n" style="color: #333;">doPassM</span> <span class="p">(</span><span class="n" style="color: #333;">liftIO</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">do_pass</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">fam_envs</span><span class="p">)</span> <span class="n" style="color: #333;">guts</span></span>
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577
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<pre style="margin: 0;"> <span id="LC577" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC578" class="line" lang="haskell"><span class="n" style="color: #333;">doPassDFRM</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FamInstEnvs</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreRule</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ModGuts</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreM</span> <span class="kt" style="color: #458; font-weight: 600;">ModGuts</span></span>
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<pre style="margin: 0;">+<span id="LC579" class="line" lang="haskell"><span class="n" style="color: #333;">doPassDFRM</span> <span class="n" style="color: #333;">do_pass</span> <span class="n" style="color: #333;">guts</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC580" class="line" lang="haskell"> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>
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<pre style="margin: 0;">+<span id="LC581" class="line" lang="haskell"> <span class="n" style="color: #333;">p_fam_env</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getPackageFamInstEnv</span></span>
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<pre style="margin: 0;">+<span id="LC582" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">fam_envs</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">p_fam_env</span><span class="p">,</span> <span class="n" style="color: #333;">mg_fam_inst_env</span> <span class="n" style="color: #333;">guts</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC583" class="line" lang="haskell"> <span class="n" style="color: #333;">doPassM</span> <span class="p">(</span><span class="n" style="color: #333;">liftIO</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">do_pass</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">fam_envs</span> <span class="p">(</span><span class="n" style="color: #333;">mg_rules</span> <span class="n" style="color: #333;">guts</span><span class="p">))</span> <span class="n" style="color: #333;">guts</span></span>
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584
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<pre style="margin: 0;">+<span id="LC584" class="line" lang="haskell"></span>
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585
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<pre style="margin: 0;"> <span id="LC585" class="line" lang="haskell"><span class="n" style="color: #333;">doPassDFU</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FamInstEnvs</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UniqSupply</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ModGuts</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreM</span> <span class="kt" style="color: #458; font-weight: 600;">ModGuts</span></span>
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586
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<pre style="margin: 0;"> <span id="LC586" class="line" lang="haskell"><span class="n" style="color: #333;">doPassDFU</span> <span class="n" style="color: #333;">do_pass</span> <span class="n" style="color: #333;">guts</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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587
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<pre style="margin: 0;"> <span id="LC587" class="line" lang="haskell"> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1088,12 +1095,12 @@ transferIdInfo exported_id local_id</td>
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1095
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<pre style="margin: 0;"> <span id="LC1095" class="line" lang="haskell"></span>
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1096
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<pre style="margin: 0;"> <span id="LC1096" class="line" lang="haskell"></span>
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1097
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<pre style="margin: 0;"> <span id="LC1097" class="line" lang="haskell"></span>
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1091
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<pre style="margin: 0;">-<span id="LC1091" class="line" lang="haskell"><span class="n" style="color: #333;">dmdAnal</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FamInstEnvs</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span></span>
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1092
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<pre style="margin: 0;">-<span id="LC1092" class="line" lang="haskell"><span class="n" style="color: #333;">dmdAnal</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">fam_envs</span> <span class="n" style="color: #333;">binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1098
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<pre style="margin: 0;">+<span id="LC1098" class="line" lang="haskell"><span class="n" style="color: #333;">dmdAnal</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FamInstEnvs</span> <span class="o" style="font-weight: 600;">-></span> <span class="p"><span class="idiff left">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreRule</span></span><span class="p"><span class="idiff">]</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;">CoreProgram</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span></span>
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1099
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<pre style="margin: 0;">+<span id="LC1099" class="line" lang="haskell"><span class="n" style="color: #333;">dmdAnal</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">fam_envs</span> <span class="n" style="color: #333;"><span class="idiff left">rules</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1100
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<pre style="margin: 0;"> <span id="LC1100" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">opts</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DmdAnalOpts</span></span>
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1094
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1101
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<pre style="margin: 0;"> <span id="LC1101" class="line" lang="haskell"> <span class="p">{</span> <span class="n" style="color: #333;">dmd_strict_dicts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gopt</span> <span class="kt" style="color: #458; font-weight: 600;">Opt_DictsStrict</span> <span class="n" style="color: #333;">dflags</span></span>
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1095
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1102
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<pre style="margin: 0;"> <span id="LC1102" class="line" lang="haskell"> <span class="p">}</span></span>
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1096
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<pre style="margin: 0;">-<span id="LC1096" class="line" lang="haskell"> <span class="n" style="color: #333;">binds_plus_dmds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dmdAnalProgram</span> <span class="n" style="color: #333;">opts</span> <span class="n" style="color: #333;">fam_envs</span> <span class="n" style="color: #333;">binds</span></span>
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1103
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<pre style="margin: 0;">+<span id="LC1103" class="line" lang="haskell"> <span class="n" style="color: #333;">binds_plus_dmds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dmdAnalProgram</span> <span class="n" style="color: #333;">opts</span> <span class="n" style="color: #333;">fam_envs</span> <span class="n" style="color: #333;"><span class="idiff left">rules</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">binds</span></span>
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1097
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1104
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<pre style="margin: 0;"> <span id="LC1104" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Err</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">dumpIfSet_dyn</span> <span class="n" style="color: #333;">dflags</span> <span class="kt" style="color: #458; font-weight: 600;">Opt_D_dump_str_signatures</span> <span class="s" style="color: #d14;">"Strictness signatures"</span> <span class="kt" style="color: #458; font-weight: 600;">FormatText</span> <span class="o" style="font-weight: 600;">$</span></span>
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1098
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1105
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<pre style="margin: 0;"> <span id="LC1105" class="line" lang="haskell"> <span class="n" style="color: #333;">dumpIdInfoOfProgram</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">strictnessInfo</span><span class="p">)</span> <span class="n" style="color: #333;">binds_plus_dmds</span></span>
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1099
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1106
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<pre style="margin: 0;"> <span id="LC1106" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Stamp out space leaks in demand analysis] in GHC.Core.Opt.DmdAnal</span></span>
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