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<h3>
Simon Peyton Jones pushed to branch wip/T18603
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/ca76dac5b0162c7a7388dd8f9a9ca4c070df4666">ca76dac5</a></strong>
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<span>by Simon Peyton Jones</span>
<i>at 2020-08-28T23:40:27+01:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Wibbles
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<h4>1 changed file:</h4>
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<a href="#bac3d5159a5688007de3aa3f5c4e50569677b347">
compiler/GHC/Core/Opt/OccurAnal.hs
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<h4>Changes:</h4>
<li id="bac3d5159a5688007de3aa3f5c4e50569677b347">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ca76dac5b0162c7a7388dd8f9a9ca4c070df4666#bac3d5159a5688007de3aa3f5c4e50569677b347"><strong>compiler/GHC/Core/Opt/OccurAnal.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -878,7 +878,7 @@ occAnalRecBind :: OccEnv -> TopLevelFlag -> ImpRuleEdges -> [(Var,CoreExpr)]</td>
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878
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<pre style="margin: 0;"> <span id="LC878" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- * feed those components to occAnalRec</span></span>
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879
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879
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<pre style="margin: 0;"> <span id="LC879" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Recursive bindings: the grand plan]</span></span>
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880
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880
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<pre style="margin: 0;"> <span id="LC880" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRecBind</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">lvl</span> <span class="n" style="color: #333;">imp_rule_edges</span> <span class="n" style="color: #333;">pairs</span> <span class="n" style="color: #333;">body_usage</span></span>
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881
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<pre style="margin: 0;">-<span id="LC881" class="line" lang="haskell"> <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;">occAnalRec</span> <span class="n" style="color: #333;">rhs_env</span> <span class="n" style="color: #333;">lvl</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff right">rule_fv_env</span></span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">body_usage</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="n" style="color: #333;">sccs</span></span>
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<pre style="margin: 0;">+<span id="LC881" class="line" lang="haskell"> <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;">occAnalRec</span> <span class="n" style="color: #333;">rhs_env</span> <span class="n" style="color: #333;">lvl</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">body_usage</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="n" style="color: #333;">sccs</span></span>
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882
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882
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<pre style="margin: 0;"> <span id="LC882" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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883
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883
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<pre style="margin: 0;"> <span id="LC883" class="line" lang="haskell"> <span class="n" style="color: #333;">sccs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">SCC</span> <span class="kt" style="color: #458; font-weight: 600;">Details</span><span class="p">]</span></span>
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884
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<pre style="margin: 0;"> <span id="LC884" class="line" lang="haskell"> <span class="n" style="color: #333;">sccs</span> <span class="o" style="font-weight: 600;">=</span> <span class="cp" style="color: #999; font-weight: 600;">{-# SCC "occAnalBind.scc" #-}</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="892" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -892,17 +892,6 @@ occAnalRecBind env lvl imp_rule_edges pairs body_usage</td>
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892
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<pre style="margin: 0;"> <span id="LC892" class="line" lang="haskell"> <span class="n" style="color: #333;">bndr_set</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVarSet</span> <span class="n" style="color: #333;">bndrs</span></span>
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<pre style="margin: 0;"> <span id="LC893" class="line" lang="haskell"> <span class="n" style="color: #333;">rhs_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</span> <span class="p">`</span><span class="n" style="color: #333;">addInScope</span><span class="p">`</span> <span class="n" style="color: #333;">bndrs</span></span>
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894
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<pre style="margin: 0;"> <span id="LC894" class="line" lang="haskell"></span>
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895
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<pre style="margin: 0;">-<span id="LC895" class="line" lang="haskell"> <span class="n" style="color: #333;">rule_fv_env</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RuleFvEnv</span></span>
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896
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<pre style="margin: 0;">-<span id="LC896" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Maps a variable f to the variables from this group</span></span>
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897
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<pre style="margin: 0;">-<span id="LC897" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- mentioned in RHS of /active/ rules for f</span></span>
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898
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<pre style="margin: 0;">-<span id="LC898" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Domain is *subset* of bound vars (others have no rule fvs)</span></span>
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899
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<pre style="margin: 0;">-<span id="LC899" class="line" lang="haskell"> <span class="n" style="color: #333;">rule_fv_env</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Finding rule RHS free vars]</span></span>
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900
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<pre style="margin: 0;">-<span id="LC900" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVarEnv</span> <span class="p">[</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="p">,</span> <span class="n" style="color: #333;">rule_fvs</span><span class="p">)</span></span>
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901
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<pre style="margin: 0;">-<span id="LC901" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">node_payload</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ND</span> <span class="p">{</span> <span class="n" style="color: #333;">nd_bndr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">b</span></span>
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<pre style="margin: 0;">-<span id="LC902" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_active_rule_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rule_fvs</span> <span class="p">})</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">nodes</span></span>
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<pre style="margin: 0;">-<span id="LC903" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isEmptyVarSet</span> <span class="n" style="color: #333;">rule_fvs</span><span class="p">)</span> <span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC904" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC905" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC895" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<pre style="margin: 0;"> <span id="LC896" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Unfoldings and join points]</span></span>
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<pre style="margin: 0;"> <span id="LC897" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -913,33 +902,30 @@ calls for the purpose of finding join points.</td>
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<pre style="margin: 0;"> <span id="LC902" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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<pre style="margin: 0;"> <span id="LC903" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC904" 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="LC916" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRec</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TopLevelFlag</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">RuleFvEnv</span></span></span>
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<pre style="margin: 0;">+<span id="LC905" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRec</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccEnv</span> <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="LC906" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SCC</span> <span class="kt" style="color: #458; font-weight: 600;">Details</span></span>
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<pre style="margin: 0;"> <span id="LC907" 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;">UsageDetails</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBind</span><span class="p">])</span></span>
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<pre style="margin: 0;"> <span id="LC908" 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;">UsageDetails</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBind</span><span class="p">])</span></span>
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<pre style="margin: 0;"> <span id="LC909" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC910" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The NonRec case is just like a Let (NonRec ...) above</span></span>
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<pre style="margin: 0;">-<span id="LC922" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRec</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">lvl</span> <span class="n" style="color: #333;">rule_fv_env</span></span>
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<pre style="margin: 0;">-<span id="LC923" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">AcyclicSCC</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ND</span> <span class="p">{</span> <span class="n" style="color: #333;">nd_bndr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bndr</span><span class="p">,</span> <span class="n" style="color: #333;">nd_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs</span><span class="p">,</span> <span class="n" style="color: #333;">nd_inl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">inl_fvs</span></span>
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<pre style="margin: 0;">-<span id="LC924" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs_uds</span><span class="p">,</span> <span class="n" style="color: #333;">nd_rhs_bndrs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs_bndrs</span> <span class="p">}))</span></span>
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<pre style="margin: 0;">+<span id="LC911" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRec</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">lvl</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">AcyclicSCC</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ND</span> <span class="p">{</span> <span class="n" style="color: #333;">nd_bndr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bndr</span><span class="p">,</span> <span class="n" style="color: #333;">nd_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs</span></span>
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<td class="diff-line-num new old_line" data-linenumber="925" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<td class="diff-line-num new new_line" data-linenumber="912" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
912
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<pre style="margin: 0;">+<span id="LC912" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs_uds</span><span class="p">,</span> <span class="n" style="color: #333;">nd_rhs_bndrs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs_bndrs</span> <span class="p">}))</span></span>
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925
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<td class="diff-line-num new_line" data-linenumber="913" 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">
913
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<pre style="margin: 0;"> <span id="LC913" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">body_uds</span><span class="p">,</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span></span>
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<td class="diff-line-num old_line" data-linenumber="926" 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">
926
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<td class="diff-line-num new_line" data-linenumber="914" 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">
914
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<pre style="margin: 0;"> <span id="LC914" class="line" lang="haskell"> <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;">bndr</span> <span class="p">`</span><span class="n" style="color: #333;">usedIn</span><span class="p">`</span> <span class="n" style="color: #333;">body_uds</span><span class="p">)</span></span>
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<td class="diff-line-num old_line" data-linenumber="927" 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">
927
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<td class="diff-line-num new_line" data-linenumber="915" 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">
915
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<pre style="margin: 0;"> <span id="LC915" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">body_uds</span><span class="p">,</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Dead code]</span></span>
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<td class="diff-line-num old_line" data-linenumber="928" 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">
928
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<td class="diff-line-num new_line" data-linenumber="916" 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">
916
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<pre style="margin: 0;"> <span id="LC916" class="line" lang="haskell"></span>
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<td class="diff-line-num old_line" data-linenumber="929" 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">
929
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<td class="diff-line-num new_line" data-linenumber="917" 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">
917
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<pre style="margin: 0;"> <span id="LC917" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="c1" style="color: #998; font-style: italic;">-- It's mentioned in the body</span></span>
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<td class="diff-line-num old_line" data-linenumber="930" 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">
930
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<td class="diff-line-num new_line" data-linenumber="918" 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">
918
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<pre style="margin: 0;"> <span id="LC918" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">body_uds'</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">rhs_uds'</span><span class="p">,</span></span>
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<td class="diff-line-num old old_line" data-linenumber="931" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
931
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<td class="diff-line-num new_line old" data-linenumber="919" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC931" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;"><span class="idiff left right">final</span>_bndr</span> <span class="n" style="color: #333;">rhs</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span></span>
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<td class="diff-line-num new old_line" data-linenumber="932" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<td class="diff-line-num new new_line" data-linenumber="919" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
919
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<pre style="margin: 0;">+<span id="LC919" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;"><span class="idiff left right">tagged</span>_bndr</span> <span class="n" style="color: #333;">rhs</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span></span>
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<td class="diff-line-num old_line" data-linenumber="932" 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">
932
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<td class="diff-line-num new_line" data-linenumber="920" 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">
920
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<pre style="margin: 0;"> <span id="LC920" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<td class="diff-line-num old_line" data-linenumber="933" 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">
933
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<td class="diff-line-num new_line" data-linenumber="921" 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">
921
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<pre style="margin: 0;"> <span id="LC921" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">body_uds'</span><span class="p">,</span> <span class="n" style="color: #333;">tagged_bndr</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tagNonRecBinder</span> <span class="n" style="color: #333;">lvl</span> <span class="n" style="color: #333;">body_uds</span> <span class="n" style="color: #333;">bndr</span></span>
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<td class="diff-line-num old old_line" data-linenumber="934" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
934
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<td class="diff-line-num new_line old" data-linenumber="922" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC934" class="line" lang="haskell"> <span class="n" style="color: #333;">final_bndr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setNonRecLoopBreaker</span> <span class="n" style="color: #333;">lvl</span> <span class="n" style="color: #333;">rule_fv_env</span> <span class="n" style="color: #333;">inl_fvs</span> <span class="n" style="color: #333;">tagged_bndr</span></span>
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<td class="diff-line-num old_line" data-linenumber="935" 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">
935
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<td class="diff-line-num new_line" data-linenumber="922" 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">
922
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<pre style="margin: 0;"> <span id="LC922" class="line" lang="haskell"> <span class="n" style="color: #333;">rhs_uds'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">adjustRhsUsage</span> <span class="kt" style="color: #458; font-weight: 600;">NonRecursive</span> <span class="p">(</span><span class="n" style="color: #333;">willBeJoinId_maybe</span> <span class="n" style="color: #333;">tagged_bndr</span><span class="p">)</span></span>
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<td class="diff-line-num old_line" data-linenumber="936" 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">
936
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<td class="diff-line-num new_line" data-linenumber="923" 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">
923
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<pre style="margin: 0;"> <span id="LC923" class="line" lang="haskell"> <span class="n" style="color: #333;">rhs_bndrs</span> <span class="n" style="color: #333;">rhs_uds</span></span>
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<td class="diff-line-num old_line" data-linenumber="937" 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">
937
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<td class="diff-line-num new_line" data-linenumber="924" 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">
924
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<pre style="margin: 0;"> <span id="LC924" class="line" lang="haskell"></span>
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<td class="diff-line-num old_line" data-linenumber="938" 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">
938
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<td class="diff-line-num new_line" data-linenumber="925" 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">
925
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<pre style="margin: 0;"> <span id="LC925" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The Rec case is the interesting one</span></span>
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<td class="diff-line-num old_line" data-linenumber="939" 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">
939
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<td class="diff-line-num new_line" data-linenumber="926" 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">
926
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<pre style="margin: 0;"> <span id="LC926" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Recursive bindings: the grand plan]</span></span>
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<td class="diff-line-num old_line" data-linenumber="940" 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">
940
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<td class="diff-line-num new_line" data-linenumber="927" 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">
927
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<pre style="margin: 0;"> <span id="LC927" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Loop breaking]</span></span>
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<td class="diff-line-num old old_line" data-linenumber="941" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
941
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<td class="diff-line-num new_line old" data-linenumber="928" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC941" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRec</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">lvl</span> <span class="n" style="color: #333;">rule_fv_env</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="942" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
942
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<td class="diff-line-num new_line old" data-linenumber="928" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC942" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CyclicSCC</span> <span class="n" style="color: #333;">details_s</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">body_uds</span><span class="p">,</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span></span>
</pre>
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928
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<pre style="margin: 0;">+<span id="LC928" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRec</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">lvl</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CyclicSCC</span> <span class="n" style="color: #333;">details_s</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">body_uds</span><span class="p">,</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span></span>
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943
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929
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<pre style="margin: 0;"> <span id="LC929" class="line" lang="haskell"> <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;">any</span> <span class="p">(`</span><span class="n" style="color: #333;">usedIn</span><span class="p">`</span> <span class="n" style="color: #333;">body_uds</span><span class="p">)</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- NB: look at body_uds, not total_uds</span></span>
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944
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930
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<pre style="margin: 0;"> <span id="LC930" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">body_uds</span><span class="p">,</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Dead code]</span></span>
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945
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931
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<pre style="margin: 0;"> <span id="LC931" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -950,15 +936,14 @@ occAnalRec env lvl rule_fv_env</td>
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950
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936
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<pre style="margin: 0;"> <span id="LC936" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">final_uds</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;">binds</span><span class="p">)</span></span>
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951
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937
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<pre style="margin: 0;"> <span id="LC937" class="line" lang="haskell"></span>
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952
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938
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<pre style="margin: 0;"> <span id="LC938" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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953
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<pre style="margin: 0;">-<span id="LC953" 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;">nd_bndr</span> <span class="n" style="color: #333;">details_s</span></span>
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954
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<pre style="margin: 0;">-<span id="LC954" class="line" lang="haskell"> <span class="n" style="color: #333;">bndr_set</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVarSet</span> <span class="n" style="color: #333;">bndrs</span></span>
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939
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<pre style="margin: 0;">+<span id="LC939" 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;">nd_bndr</span> <span class="n" style="color: #333;">details_s</span></span>
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955
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940
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<pre style="margin: 0;"> <span id="LC940" class="line" lang="haskell"></span>
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956
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941
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<pre style="margin: 0;"> <span id="LC941" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">------------------------------</span></span>
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957
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<pre style="margin: 0;">-<span id="LC957" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Choosing loop breakers] for loop_breaker_nodes</span></span>
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942
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<pre style="margin: 0;">+<span id="LC942" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Make the nodes for the loop-breaker analysis</span></span>
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943
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<pre style="margin: 0;">+<span id="LC943" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Choosing loop breakers] for loop_breaker_nodes</span></span>
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958
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944
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<pre style="margin: 0;"> <span id="LC944" class="line" lang="haskell"> <span class="n" style="color: #333;">final_uds</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span></span>
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959
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945
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<pre style="margin: 0;"> <span id="LC945" class="line" lang="haskell"> <span class="n" style="color: #333;">loop_breaker_nodes</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LetrecNode</span><span class="p">]</span></span>
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960
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<pre style="margin: 0;">-<span id="LC960" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">final_uds</span><span class="p">,</span> <span class="n" style="color: #333;">loop_breaker_nodes</span><span class="p">)</span></span>
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961
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<pre style="margin: 0;">-<span id="LC961" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkLoopBreakerNodes</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">lvl</span> <span class="n" style="color: #333;">rule_fv_env</span> <span class="n" style="color: #333;">body_uds</span> <span class="n" style="color: #333;">details_s</span></span>
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946
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<pre style="margin: 0;">+<span id="LC946" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">final_uds</span><span class="p">,</span> <span class="n" style="color: #333;">loop_breaker_nodes</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkLoopBreakerNodes</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">lvl</span> <span class="n" style="color: #333;">body_uds</span> <span class="n" style="color: #333;">details_s</span></span>
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962
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947
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<pre style="margin: 0;"> <span id="LC947" class="line" lang="haskell"></span>
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948
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<pre style="margin: 0;"> <span id="LC948" 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="LC949" class="line" lang="haskell"> <span class="n" style="color: #333;">weak_fvs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -967,8 +952,8 @@ occAnalRec env lvl rule_fv_env</td>
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967
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952
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<pre style="margin: 0;"> <span id="LC952" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">---------------------------</span></span>
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968
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953
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<pre style="margin: 0;"> <span id="LC953" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Now reconstruct the cycle</span></span>
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969
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954
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<pre style="margin: 0;"> <span id="LC954" class="line" lang="haskell"> <span class="n" style="color: #333;">pairs</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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970
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<pre style="margin: 0;">-<span id="LC970" class="line" lang="haskell"> <span class="n" style="color: #333;">pairs</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isEmptyVarSet</span> <span class="n" style="color: #333;">weak_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">reOrderNodes</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;"><span class="idiff left">bndr_set</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">loop_breaker_nodes</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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971
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<pre style="margin: 0;">-<span id="LC971" 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;">loopBreakNodes</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;"><span class="idiff left">bndr_set</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">loop_breaker_nodes</span> <span class="kt" style="color: #458; font-weight: 600;">[]</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;">pairs</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isEmptyVarSet</span> <span class="n" style="color: #333;">weak_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">reOrderNodes</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">loop_breaker_nodes</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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<pre style="margin: 0;">+<span id="LC956" 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;">loopBreakNodes</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">loop_breaker_nodes</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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972
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<pre style="margin: 0;"> <span id="LC957" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- If weak_fvs is empty, the loop_breaker_nodes will include</span></span>
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958
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<pre style="margin: 0;"> <span id="LC958" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- all the edges in the original scope edges [remember,</span></span>
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<pre style="margin: 0;"> <span id="LC959" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- weak_fvs is the difference between scope edges and</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">@@ -981,20 +966,9 @@ occAnalRec env lvl rule_fv_env</td>
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981
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966
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<pre style="margin: 0;"> <span id="LC966" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Loop breaking</span></span>
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982
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967
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<pre style="margin: 0;"> <span id="LC967" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------------------------------------</span></span>
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983
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968
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<pre style="margin: 0;"> <span id="LC968" class="line" lang="haskell"></span>
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984
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<pre style="margin: 0;">-<span id="LC984" class="line" lang="haskell"><span class="n" style="color: #333;">setNonRecLoopBreaker</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TopLevelFlag</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RuleFvEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span></span>
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985
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<pre style="margin: 0;">-<span id="LC985" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Non-recursive loop breakers]</span></span>
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986
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<pre style="margin: 0;">-<span id="LC986" class="line" lang="haskell"><span class="n" style="color: #333;">setNonRecLoopBreaker</span> <span class="n" style="color: #333;">lvl</span> <span class="n" style="color: #333;">rule_fv_env</span> <span class="n" style="color: #333;">inl_fvs</span> <span class="n" style="color: #333;">bndr</span></span>
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987
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<pre style="margin: 0;">-<span id="LC987" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isTopLevel</span> <span class="n" style="color: #333;">lvl</span> <span class="c1" style="color: #998; font-style: italic;">-- Only relevant for top-level binders</span></span>
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988
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<pre style="margin: 0;">-<span id="LC988" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- since nested binders are never in rng(rule_fv_env)</span></span>
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<pre style="margin: 0;">-<span id="LC989" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">rule_loop</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mk_loop_breaker</span> <span class="n" style="color: #333;">bndr</span></span>
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<pre style="margin: 0;">-<span id="LC990" 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;">bndr</span></span>
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<pre style="margin: 0;">-<span id="LC991" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC992" class="line" lang="haskell"> <span class="n" style="color: #333;">rule_loop</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bndr</span> <span class="p">`</span><span class="n" style="color: #333;">elemVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">extendFvs_</span> <span class="n" style="color: #333;">rule_fv_env</span> <span class="n" style="color: #333;">inl_fvs</span></span>
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<pre style="margin: 0;">-<span id="LC993" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC969" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">Binding</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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<pre style="margin: 0;"> <span id="LC970" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC971" class="line" lang="haskell"><span class="n" style="color: #333;">loopBreakNodes</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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<pre style="margin: 0;">-<span id="LC997" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="c1" style="color: #998; font-style: italic;">-- All binders</span></span>
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<pre style="margin: 0;"> <span id="LC972" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="c1" style="color: #998; font-style: italic;">-- Binders whose dependencies may be "missing"</span></span>
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<pre style="margin: 0;"> <span id="LC973" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Weak loop breakers]</span></span>
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<pre style="margin: 0;"> <span id="LC974" 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;">LetrecNode</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">@@ -1018,7 +992,7 @@ recording inlinings for any Ids which aren't marked as "no-inline" as it goes.</td>
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<pre style="margin: 0;"> <span id="LC992" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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<pre style="margin: 0;"> <span id="LC993" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC994" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Return the bindings sorted into a plausible order, and marked with loop breakers.</span></span>
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<pre style="margin: 0;">-<span id="LC1021" class="line" lang="haskell"><span class="n" style="color: #333;">loopBreakNodes</span> <span class="n" style="color: #333;">depth</span> <span class="n" style="color: #333;"><span class="idiff left">bndr_set</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">nodes</span> <span class="n" style="color: #333;">binds</span></span>
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<pre style="margin: 0;">+<span id="LC995" class="line" lang="haskell"><span class="n" style="color: #333;">loopBreakNodes</span> <span class="n" style="color: #333;">depth</span> <span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">nodes</span> <span class="n" style="color: #333;">binds</span></span>
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<pre style="margin: 0;"> <span id="LC996" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "loopBreakNodes" (ppr nodes) $</span></span>
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<pre style="margin: 0;"> <span id="LC997" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">stronglyConnCompFromEdgedVerticesUniqR</span> <span class="n" style="color: #333;">nodes</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC998" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</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">@@ -1028,18 +1002,18 @@ loopBreakNodes depth bndr_set weak_fvs nodes binds</td>
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<pre style="margin: 0;"> <span id="LC1002" class="line" lang="haskell"> <span class="n" style="color: #333;">loop_break_scc</span> <span class="n" style="color: #333;">scc</span> <span class="n" style="color: #333;">binds</span></span>
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1029
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1003
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<pre style="margin: 0;"> <span id="LC1003" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">scc</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1030
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1004
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<pre style="margin: 0;"> <span id="LC1004" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">AcyclicSCC</span> <span class="n" style="color: #333;">node</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">nodeBinding</span> <span class="p">(</span><span class="n" style="color: #333;">mk_non_loop_breaker</span> <span class="n" style="color: #333;">weak_fvs</span><span class="p">)</span> <span class="n" style="color: #333;">node</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">binds</span></span>
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1031
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<pre style="margin: 0;">-<span id="LC1031" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">CyclicSCC</span> <span class="n" style="color: #333;">nodes</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">reOrderNodes</span> <span class="n" style="color: #333;">depth</span> <span class="n" style="color: #333;"><span class="idiff left">bndr_set</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">nodes</span> <span class="n" style="color: #333;">binds</span></span>
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1005
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<pre style="margin: 0;">+<span id="LC1005" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">CyclicSCC</span> <span class="n" style="color: #333;">nodes</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">reOrderNodes</span> <span class="n" style="color: #333;">depth</span> <span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">nodes</span> <span class="n" style="color: #333;">binds</span></span>
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1032
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1006
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<pre style="margin: 0;"> <span id="LC1006" class="line" lang="haskell"></span>
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1033
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1007
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<pre style="margin: 0;"> <span id="LC1007" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">----------------------------------</span></span>
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1034
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<pre style="margin: 0;">-<span id="LC1034" class="line" lang="haskell"><span class="n" style="color: #333;">reOrderNodes</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">VarSet</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LetrecNode</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;">Binding</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;">Binding</span><span class="p">]</span></span>
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1008
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<pre style="margin: 0;">+<span id="LC1008" class="line" lang="haskell"><span class="n" style="color: #333;">reOrderNodes</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LetrecNode</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;">Binding</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;">Binding</span><span class="p">]</span></span>
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1035
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1009
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<pre style="margin: 0;"> <span id="LC1009" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Choose a loop breaker, mark it no-inline,</span></span>
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1036
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1010
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<pre style="margin: 0;"> <span id="LC1010" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- and call loopBreakNodes on the rest</span></span>
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1037
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<pre style="margin: 0;">-<span id="LC1037" class="line" lang="haskell"><span class="n" style="color: #333;">reOrderNodes</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">_</span></span><span class="idiff right"> </span><span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"reOrderNodes"</span></span>
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1038
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<pre style="margin: 0;">-<span id="LC1038" class="line" lang="haskell"><span class="n" style="color: #333;">reOrderNodes</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">_</span></span><span class="idiff right"> </span><span class="p">[</span><span class="n" style="color: #333;">node</span><span class="p">]</span> <span class="n" style="color: #333;">binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nodeBinding</span> <span class="n" style="color: #333;">mk_loop_breaker</span> <span class="n" style="color: #333;">node</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">binds</span></span>
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1039
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<pre style="margin: 0;">-<span id="LC1039" class="line" lang="haskell"><span class="n" style="color: #333;">reOrderNodes</span> <span class="n" style="color: #333;">depth</span> <span class="n" style="color: #333;"><span class="idiff left">bndr_set</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">weak_fvs</span> <span class="p">(</span><span class="n" style="color: #333;">node</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">nodes</span><span class="p">)</span> <span class="n" style="color: #333;">binds</span></span>
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1011
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<pre style="margin: 0;">+<span id="LC1011" class="line" lang="haskell"><span class="n" style="color: #333;">reOrderNodes</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"reOrderNodes"</span></span>
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1012
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<pre style="margin: 0;">+<span id="LC1012" class="line" lang="haskell"><span class="n" style="color: #333;">reOrderNodes</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">[</span><span class="n" style="color: #333;">node</span><span class="p">]</span> <span class="n" style="color: #333;">binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nodeBinding</span> <span class="n" style="color: #333;">mk_loop_breaker</span> <span class="n" style="color: #333;">node</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">binds</span></span>
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1013
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<pre style="margin: 0;">+<span id="LC1013" class="line" lang="haskell"><span class="n" style="color: #333;">reOrderNodes</span> <span class="n" style="color: #333;">depth</span> <span class="n" style="color: #333;">weak_fvs</span> <span class="p">(</span><span class="n" style="color: #333;">node</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">nodes</span><span class="p">)</span> <span class="n" style="color: #333;">binds</span></span>
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1040
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1014
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<pre style="margin: 0;"> <span id="LC1014" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "reOrderNodes" (vcat [ text "unchosen" <+> ppr unchosen</span></span>
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1041
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1015
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<pre style="margin: 0;"> <span id="LC1015" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- , text "chosen" <+> ppr chosen_nodes ]) $</span></span>
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1042
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<pre style="margin: 0;">-<span id="LC1042" class="line" lang="haskell"> <span class="n" style="color: #333;">loopBreakNodes</span> <span class="n" style="color: #333;">new_depth</span> <span class="n" style="color: #333;"><span class="idiff left">bndr_set</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">unchosen</span> <span class="o" style="font-weight: 600;">$</span></span>
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1016
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<pre style="margin: 0;">+<span id="LC1016" class="line" lang="haskell"> <span class="n" style="color: #333;">loopBreakNodes</span> <span class="n" style="color: #333;">new_depth</span> <span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">unchosen</span> <span class="o" style="font-weight: 600;">$</span></span>
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1043
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1017
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<pre style="margin: 0;"> <span id="LC1017" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="n" style="color: #333;">nodeBinding</span> <span class="n" style="color: #333;">mk_loop_breaker</span><span class="p">)</span> <span class="n" style="color: #333;">chosen_nodes</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span></span>
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1044
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1018
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<pre style="margin: 0;"> <span id="LC1018" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1045
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1019
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<pre style="margin: 0;"> <span id="LC1019" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">chosen_nodes</span><span class="p">,</span> <span class="n" style="color: #333;">unchosen</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">chooseLoopBreaker</span> <span class="n" style="color: #333;">approximate_lb</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1270" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1244" 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">@@ -1270,7 +1244,8 @@ data Details</td>
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1270
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1244
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<pre style="margin: 0;"> <span id="LC1244" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- dependencies might not be respected by loop_breaker_nodes</span></span>
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1271
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<td class="diff-line-num new_line" data-linenumber="1245" 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">
1245
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<pre style="margin: 0;"> <span id="LC1245" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Weak loop breakers]</span></span>
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1272
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1246
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<pre style="margin: 0;"> <span id="LC1246" class="line" lang="haskell"></span>
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1273
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<pre style="margin: 0;">-<span id="LC1273" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_active_rule_fvs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IdSet</span> <span class="c1" style="color: #998; font-style: italic;">-- Free variables of the RHS of active RULES</span></span>
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1247
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<pre style="margin: 0;">+<span id="LC1247" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_active_rule_fvs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IdSet</span> <span class="c1" style="color: #998; font-style: italic;">-- Variables bound in this Rec group that are free</span></span>
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1248
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<pre style="margin: 0;">+<span id="LC1248" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in the RHS of an active rule for this bndr</span></span>
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1274
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1249
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<pre style="margin: 0;"> <span id="LC1249" class="line" lang="haskell"></span>
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1275
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1250
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<pre style="margin: 0;"> <span id="LC1250" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_score</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NodeScore</span></span>
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1276
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1251
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<pre style="margin: 0;"> <span id="LC1251" class="line" lang="haskell"> <span class="p">}</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1256" 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">@@ -1281,7 +1256,7 @@ instance Outputable Details where</td>
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1281
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1256
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<pre style="margin: 0;"> <span id="LC1256" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"uds ="</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">nd_uds</span> <span class="n" style="color: #333;">nd</span><span class="p">)</span></span>
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1282
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1257
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<pre style="margin: 0;"> <span id="LC1257" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"inl ="</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">nd_inl</span> <span class="n" style="color: #333;">nd</span><span class="p">)</span></span>
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1283
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<td class="diff-line-num new_line" data-linenumber="1258" 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">
1258
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<pre style="margin: 0;"> <span id="LC1258" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"weak ="</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">nd_weak</span> <span class="n" style="color: #333;">nd</span><span class="p">)</span></span>
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1284
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<td class="diff-line-num new_line old" data-linenumber="1259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC1284" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"rule ="</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">nd_active_rule_fvs</span> <span class="n" style="color: #333;">nd</span><span class="p">)</span></span>
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1259
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<pre style="margin: 0;">+<span id="LC1259" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"rule<span class="idiff left right">_rvs</span> ="</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">nd_active_rule_fvs</span> <span class="n" style="color: #333;">nd</span><span class="p">)</span></span>
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1285
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1260
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<pre style="margin: 0;"> <span id="LC1260" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"score ="</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">nd_score</span> <span class="n" style="color: #333;">nd</span><span class="p">)</span></span>
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1286
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1261
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<pre style="margin: 0;"> <span id="LC1261" class="line" lang="haskell"> <span class="p">])</span></span>
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1287
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1262
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<pre style="margin: 0;"> <span id="LC1262" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1315" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1290" 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">@@ -1315,7 +1290,7 @@ makeNode env imp_rule_edges bndr_set (bndr, rhs)</td>
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1315
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1290
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<pre style="margin: 0;"> <span id="LC1290" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs_usage</span></span>
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1316
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<td class="diff-line-num new_line" data-linenumber="1291" 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">
1291
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<pre style="margin: 0;"> <span id="LC1291" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_inl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">inl_fvs</span></span>
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<td class="diff-line-num old_line" data-linenumber="1317" 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">
1317
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<td class="diff-line-num new_line" data-linenumber="1292" 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">
1292
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<pre style="margin: 0;"> <span id="LC1292" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_weak</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">node_fvs</span> <span class="p">`</span><span class="n" style="color: #333;">minusVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">inl_fvs</span></span>
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1318
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<pre style="margin: 0;">-<span id="LC1318" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_active_rule_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">active_rule_fvs</span><span class="idiff left"> </span><span class="p"><span class="idiff">`</span></span><span class="n" style="color: #333;"><span class="idiff">intersectVarSet</span></span><span class="p"><span class="idiff">`</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">bndr_set</span></span></span>
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<td class="diff-line-num new old_line" data-linenumber="1319" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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1293
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<pre style="margin: 0;">+<span id="LC1293" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_active_rule_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">active_rule_fvs</span></span>
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1319
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1294
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<pre style="margin: 0;"> <span id="LC1294" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">nd_score</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"makeNodeDetails"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">bndr</span><span class="p">)</span> <span class="p">}</span></span>
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1320
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1295
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<pre style="margin: 0;"> <span id="LC1295" class="line" lang="haskell"></span>
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1321
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1296
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<pre style="margin: 0;"> <span id="LC1296" class="line" lang="haskell"> <span class="n" style="color: #333;">bndr'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bndr</span> <span class="p">`</span><span class="n" style="color: #333;">setIdUnfolding</span><span class="p">`</span> <span class="n" style="color: #333;">unf'</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1348" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1323" 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">@@ -1348,7 +1323,6 @@ makeNode env imp_rule_edges bndr_set (bndr, rhs)</td>
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1348
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1323
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<pre style="margin: 0;"> <span id="LC1323" class="line" lang="haskell"> <span class="n" style="color: #333;">unf</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">realIdUnfolding</span> <span class="n" style="color: #333;">bndr</span> <span class="c1" style="color: #998; font-style: italic;">-- realIdUnfolding: Ignore loop-breaker-ness</span></span>
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<td class="diff-line-num old_line" data-linenumber="1349" 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">
1349
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1324
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<pre style="margin: 0;"> <span id="LC1324" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- here because that is what we are setting!</span></span>
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1350
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1325
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<pre style="margin: 0;"> <span id="LC1325" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">unf_uds</span><span class="p">,</span> <span class="n" style="color: #333;">unf'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalUnfolding</span> <span class="n" style="color: #333;">rhs_env</span> <span class="kt" style="color: #458; font-weight: 600;">Recursive</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">unf</span></span>
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1351
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<pre style="margin: 0;">-<span id="LC1351" class="line" lang="haskell"> <span class="n" style="color: #333;">inl_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">restrictFreeVars</span> <span class="n" style="color: #333;">bndr_set</span> <span class="p">(</span><span class="n" style="color: #333;">inlineFreeVars</span> <span class="n" style="color: #333;">unf</span> <span class="n" style="color: #333;">unf_uds</span> <span class="n" style="color: #333;">rhs_uds</span><span class="p">)</span></span>
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1352
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1326
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<pre style="margin: 0;"> <span id="LC1326" class="line" lang="haskell"></span>
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1353
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1327
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<pre style="margin: 0;"> <span id="LC1327" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--------- Rules ---------</span></span>
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1354
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<td class="diff-line-num new_line" data-linenumber="1328" 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">
1328
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<pre style="margin: 0;"> <span id="LC1328" class="line" lang="haskell"> <span class="n" style="color: #333;">rules_w_uds</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="kt" style="color: #458; font-weight: 600;">UsageDetails</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span><span class="p">)]</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1361" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1335" 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">@@ -1361,6 +1335,16 @@ makeNode env imp_rule_edges bndr_set (bndr, rhs)</td>
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1361
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1335
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<pre style="margin: 0;"> <span id="LC1335" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">emptyDetails</span></span>
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1362
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1336
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<pre style="margin: 0;"> <span id="LC1336" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">vs</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">addManyOccs</span> <span class="n" style="color: #333;">emptyDetails</span> <span class="n" style="color: #333;">vs</span></span>
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1363
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1337
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<pre style="margin: 0;"> <span id="LC1337" class="line" lang="haskell"></span>
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1338
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<pre style="margin: 0;">+<span id="LC1338" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--------- Loop-breaker analysis dependencies</span></span>
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1339
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<pre style="margin: 0;">+<span id="LC1339" class="line" lang="haskell"> <span class="n" style="color: #333;">inl_uds</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isStableUnfolding</span> <span class="n" style="color: #333;">unf</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unf_uds</span></span>
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1340
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<pre style="margin: 0;">+<span id="LC1340" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs_uds</span></span>
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1341
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<pre style="margin: 0;">+<span id="LC1341" class="line" lang="haskell"> <span class="n" style="color: #333;">inl_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">udFreeVars</span> <span class="n" style="color: #333;">bndr_set</span> <span class="n" style="color: #333;">inl_uds</span></span>
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1342
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<pre style="margin: 0;">+<span id="LC1342" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- inl_fvs: the vars that would become free if the function was inlined;</span></span>
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1343
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<pre style="margin: 0;">+<span id="LC1343" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- usually that means the RHS, unless the unfolding is a stable one.</span></span>
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1344
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<pre style="margin: 0;">+<span id="LC1344" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Note: We could do this only for functions with an *active* unfolding</span></span>
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1345
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<pre style="margin: 0;">+<span id="LC1345" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (returning emptyVarSet for an inactive one), but is_active</span></span>
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1346
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<pre style="margin: 0;">+<span id="LC1346" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- isn't the right thing (it tells about RULE activation),</span></span>
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1347
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<pre style="margin: 0;">+<span id="LC1347" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- so we'd need more plumbing</span></span>
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1348
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<pre style="margin: 0;"> <span id="LC1348" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1349" class="line" lang="haskell"> <span class="n" style="color: #333;">is_active</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occ_rule_act</span> <span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Activation</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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1366
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<pre style="margin: 0;"> <span id="LC1350" class="line" lang="haskell"> <span class="n" style="color: #333;">imp_rule_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">udFreeVars</span> <span class="n" style="color: #333;">bndr_set</span> <span class="n" style="color: #333;">imp_rule_uds</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1371" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1355" 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">@@ -1371,35 +1355,21 @@ makeNode env imp_rule_edges bndr_set (bndr, rhs)</td>
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1371
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1355
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<pre style="margin: 0;"> <span id="LC1355" 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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1372
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1356
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<pre style="margin: 0;"> <span id="LC1356" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fvs</span></span>
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1373
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1357
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<pre style="margin: 0;"> <span id="LC1357" class="line" lang="haskell"></span>
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1374
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<pre style="margin: 0;">-<span id="LC1374" class="line" lang="haskell"><span class="n" style="color: #333;">inlineFreeVars</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Unfolding</span></span>
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1375
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<pre style="margin: 0;">-<span id="LC1375" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span> <span class="c1" style="color: #998; font-style: italic;">-- Of the unfolding</span></span>
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1376
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<pre style="margin: 0;">-<span id="LC1376" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span> <span class="c1" style="color: #998; font-style: italic;">-- Of the RHS</span></span>
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1377
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<pre style="margin: 0;">-<span id="LC1377" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">OccInfoEnv</span></span>
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1378
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<pre style="margin: 0;">-<span id="LC1378" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Find the UsageDetails that would become free if the function</span></span>
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1379
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<pre style="margin: 0;">-<span id="LC1379" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- was inlined; usually that means the RHS, unless the</span></span>
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1380
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<pre style="margin: 0;">-<span id="LC1380" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- unfolding is a stable one.</span></span>
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1381
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<pre style="margin: 0;">-<span id="LC1381" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note: We could do this only for functions with an *active* unfolding</span></span>
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1382
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<pre style="margin: 0;">-<span id="LC1382" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (returning emptyVarSet for an inactive one), but is_active</span></span>
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1383
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<pre style="margin: 0;">-<span id="LC1383" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- isn't the right thing (it tells about RULE activation),</span></span>
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1384
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<pre style="margin: 0;">-<span id="LC1384" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- so we'd need more plumbing</span></span>
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1385
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<pre style="margin: 0;">-<span id="LC1385" class="line" lang="haskell"><span class="n" style="color: #333;">inlineFreeVars</span> <span class="n" style="color: #333;">unf</span> <span class="n" style="color: #333;">unf_uds</span> <span class="n" style="color: #333;">rhs_uds</span></span>
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1386
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<pre style="margin: 0;">-<span id="LC1386" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isStableUnfolding</span> <span class="n" style="color: #333;">unf</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ud_env</span> <span class="n" style="color: #333;">unf_uds</span></span>
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1387
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<pre style="margin: 0;">-<span id="LC1387" 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;">ud_env</span> <span class="n" style="color: #333;">rhs_uds</span></span>
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1358
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<pre style="margin: 0;"> <span id="LC1358" class="line" lang="haskell"></span>
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1389
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1359
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<pre style="margin: 0;"> <span id="LC1359" class="line" lang="haskell"><span class="n" style="color: #333;">mkLoopBreakerNodes</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TopLevelFlag</span></span>
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1390
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<pre style="margin: 0;">-<span id="LC1390" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RuleFvEnv</span></span>
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1391
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1360
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<pre style="margin: 0;"> <span id="LC1360" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span> <span class="c1" style="color: #998; font-style: italic;">-- for BODY of let</span></span>
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1392
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1361
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<pre style="margin: 0;"> <span id="LC1361" 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;">Details</span><span class="p">]</span></span>
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1393
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1362
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<pre style="margin: 0;"> <span id="LC1362" 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;">UsageDetails</span><span class="p">,</span> <span class="c1" style="color: #998; font-style: italic;">-- adjusted</span></span>
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1394
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1363
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<pre style="margin: 0;"> <span id="LC1363" class="line" lang="haskell"> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LetrecNode</span><span class="p">])</span></span>
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1395
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<pre style="margin: 0;">-<span id="LC1395" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Does four things</span></span>
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1364
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<pre style="margin: 0;">+<span id="LC1364" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This function primarily creates the Nodes for the</span></span>
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1365
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<pre style="margin: 0;">+<span id="LC1365" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- loop-breaker SCC analysis. More specifically:</span></span>
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1396
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1366
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<pre style="margin: 0;"> <span id="LC1366" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a) tag each binder with its occurrence info</span></span>
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1397
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1367
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<pre style="margin: 0;"> <span id="LC1367" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- b) add a NodeScore to each node</span></span>
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1398
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1368
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<pre style="margin: 0;"> <span id="LC1368" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- c) make a Node with the right dependency edges for</span></span>
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1369
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<pre style="margin: 0;"> <span id="LC1369" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the loop-breaker SCC analysis</span></span>
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1400
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1370
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<pre style="margin: 0;"> <span id="LC1370" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- d) adjust each RHS's usage details according to</span></span>
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1401
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1371
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<pre style="margin: 0;"> <span id="LC1371" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the binder's (new) shotness and join-point-hood</span></span>
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1402
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<pre style="margin: 0;">-<span id="LC1402" class="line" lang="haskell"><span class="n" style="color: #333;">mkLoopBreakerNodes</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">lvl</span> <span class="n" style="color: #333;"><span class="idiff left">rule_fv_env</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">body_uds</span> <span class="n" style="color: #333;">details_s</span></span>
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1372
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<pre style="margin: 0;">+<span id="LC1372" class="line" lang="haskell"><span class="n" style="color: #333;">mkLoopBreakerNodes</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">lvl</span> <span class="n" style="color: #333;">body_uds</span> <span class="n" style="color: #333;">details_s</span></span>
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1403
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1373
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<pre style="margin: 0;"> <span id="LC1373" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">final_uds</span><span class="p">,</span> <span class="n" style="color: #333;">zipWithEqual</span> <span class="s" style="color: #d14;">"mkLoopBreakerNodes"</span> <span class="n" style="color: #333;">mk_lb_node</span> <span class="n" style="color: #333;">details_s</span> <span class="n" style="color: #333;">bndrs'</span><span class="p">)</span></span>
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1404
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1374
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<pre style="margin: 0;"> <span id="LC1374" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1405
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1375
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<pre style="margin: 0;"> <span id="LC1375" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">final_uds</span><span class="p">,</span> <span class="n" style="color: #333;">bndrs'</span><span class="p">)</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1409" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1379" 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">@@ -1409,7 +1379,7 @@ mkLoopBreakerNodes env lvl rule_fv_env body_uds details_s</td>
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1409
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1379
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<pre style="margin: 0;"> <span id="LC1379" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">details_s</span> <span class="p">]</span></span>
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1410
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1380
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<pre style="margin: 0;"> <span id="LC1380" class="line" lang="haskell"></span>
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1411
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<pre style="margin: 0;"> <span id="LC1381" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_lb_node</span> <span class="n" style="color: #333;">nd</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ND</span> <span class="p">{</span> <span class="n" style="color: #333;">nd_bndr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">old_bndr</span><span class="p">,</span> <span class="n" style="color: #333;">nd_inl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">inl_fvs</span> <span class="p">})</span> <span class="n" style="color: #333;">new_bndr</span></span>
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1412
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<pre style="margin: 0;">-<span id="LC1412" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DigraphNode</span> <span class="p">{</span> <span class="n" style="color: #333;">node_payload</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">n<span class="idiff left right">d'</span></span></span>
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1382
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<pre style="margin: 0;">+<span id="LC1382" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DigraphNode</span> <span class="p">{</span> <span class="n" style="color: #333;">node_payload</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">n<span class="idiff left right">ew_nd</span></span></span>
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1413
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1383
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<pre style="margin: 0;"> <span id="LC1383" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">node_key</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">varUnique</span> <span class="n" style="color: #333;">old_bndr</span></span>
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1414
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<pre style="margin: 0;"> <span id="LC1384" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">node_dependencies</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nonDetKeysUniqSet</span> <span class="n" style="color: #333;">lb_deps</span> <span class="p">}</span></span>
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1415
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<pre style="margin: 0;"> <span id="LC1385" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetKeysUniqSet here as</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">@@ -1417,11 +1387,37 @@ mkLoopBreakerNodes env lvl rule_fv_env body_uds details_s</td>
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1387
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<pre style="margin: 0;"> <span id="LC1387" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in nondeterministic order as explained in</span></span>
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<pre style="margin: 0;"> <span id="LC1388" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Note [Deterministic SCC] in GHC.Data.Graph.Directed.</span></span>
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1419
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<pre style="margin: 0;"> <span id="LC1389" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC1420" class="line" lang="haskell"> <span class="n" style="color: #333;">n<span class="idiff left">d'</span></span><span class="idiff right"> </span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nd</span> <span class="p">{</span> <span class="n" style="color: #333;">nd_bndr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_bndr</span><span class="p">,</span> <span class="n" style="color: #333;">nd_score</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">score</span> <span class="p">}</span></span>
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1421
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<pre style="margin: 0;">-<span id="LC1421" class="line" lang="haskell"> <span class="n" style="color: #333;">score</span> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nodeScore</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">new_bndr</span> <span class="n" style="color: #333;">lb_deps</span> <span class="n" style="color: #333;">nd</span></span>
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1390
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<pre style="margin: 0;">+<span id="LC1390" class="line" lang="haskell"> <span class="n" style="color: #333;">n<span class="idiff left right">ew_nd</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nd</span> <span class="p">{</span> <span class="n" style="color: #333;">nd_bndr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_bndr</span><span class="p">,</span> <span class="n" style="color: #333;">nd_score</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">score</span> <span class="p">}</span></span>
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1391
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<pre style="margin: 0;">+<span id="LC1391" class="line" lang="haskell"> <span class="n" style="color: #333;">score</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nodeScore</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">new_bndr</span> <span class="n" style="color: #333;">lb_deps</span> <span class="n" style="color: #333;">nd</span></span>
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1422
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1392
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<pre style="margin: 0;"> <span id="LC1392" class="line" lang="haskell"> <span class="n" style="color: #333;">lb_deps</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendFvs_</span> <span class="n" style="color: #333;">rule_fv_env</span> <span class="n" style="color: #333;">inl_fvs</span></span>
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1393
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<pre style="margin: 0;">+<span id="LC1393" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Loop breaker dependencies]</span></span>
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1394
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<pre style="margin: 0;">+<span id="LC1394" class="line" lang="haskell"></span>
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1395
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<pre style="margin: 0;">+<span id="LC1395" class="line" lang="haskell"> <span class="n" style="color: #333;">rule_fv_env</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IdEnv</span> <span class="kt" style="color: #458; font-weight: 600;">IdSet</span></span>
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1396
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<pre style="margin: 0;">+<span id="LC1396" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Maps a variable f to the variables from this group</span></span>
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1397
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<pre style="margin: 0;">+<span id="LC1397" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- reachable by a sequence of RULES starting with f</span></span>
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1398
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<pre style="margin: 0;">+<span id="LC1398" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Domain is *subset* of bound vars (others have no rule fvs)</span></span>
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1399
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<pre style="margin: 0;">+<span id="LC1399" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Finding rule RHS free vars]</span></span>
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1400
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<pre style="margin: 0;">+<span id="LC1400" class="line" lang="haskell"> <span class="n" style="color: #333;">rule_fv_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">transClosureFV</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkVarEnv</span> <span class="o" style="font-weight: 600;">$</span></span>
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1401
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<pre style="margin: 0;">+<span id="LC1401" class="line" lang="haskell"> <span class="p">[</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="p">,</span> <span class="n" style="color: #333;">rule_fvs</span><span class="p">)</span></span>
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1402
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<pre style="margin: 0;">+<span id="LC1402" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">ND</span> <span class="p">{</span> <span class="n" style="color: #333;">nd_bndr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">b</span><span class="p">,</span> <span class="n" style="color: #333;">nd_active_rule_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rule_fvs</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">details_s</span></span>
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1403
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<pre style="margin: 0;">+<span id="LC1403" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isEmptyVarSet</span> <span class="n" style="color: #333;">rule_fvs</span><span class="p">)</span> <span class="p">]</span></span>
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1404
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<pre style="margin: 0;">+<span id="LC1404" class="line" lang="haskell"></span>
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1405
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<pre style="margin: 0;">+<span id="LC1405" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Loop breaker dependencies]</span></span>
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1406
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<pre style="margin: 0;">+<span id="LC1406" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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1407
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<pre style="margin: 0;">+<span id="LC1407" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The loop breaker dependencies of x in a recursive</span></span>
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1408
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<pre style="margin: 0;">+<span id="LC1408" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">group { f1 = e1; ...; fn = en } are:</span></span>
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1423
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1409
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<pre style="margin: 0;"> <span id="LC1409" class="line" lang="haskell"></span>
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1410
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<pre style="margin: 0;">+<span id="LC1410" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">- The "inline free variables" of f: the fi free in</span></span>
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1411
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<pre style="margin: 0;">+<span id="LC1411" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> either f's unfolding (if f has a stable unfolding)</span></span>
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1412
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<pre style="margin: 0;">+<span id="LC1412" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> of f's RHS (if not)</span></span>
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1424
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1413
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<pre style="margin: 0;"> <span id="LC1413" class="line" lang="haskell"></span>
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1414
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<pre style="margin: 0;">+<span id="LC1414" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">- Any fi reachable from those inline free variables by a sequence</span></span>
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1415
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<pre style="margin: 0;">+<span id="LC1415" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> of RULE rewrites. Remember, rule rewriting is not affected</span></span>
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1416
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<pre style="margin: 0;">+<span id="LC1416" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> by fi being a loop breaker, so we have to take the transitive</span></span>
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1417
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<pre style="margin: 0;">+<span id="LC1417" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> closure in case f is the only possible loop breaker in the loop.</span></span>
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1418
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<pre style="margin: 0;">+<span id="LC1418" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1419" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Hence rule_fv_env. We need only account for /active/ rules.</span></span>
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1420
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<pre style="margin: 0;">+<span id="LC1420" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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1421
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<pre style="margin: 0;"> <span id="LC1421" class="line" lang="haskell"></span>
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1426
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<pre style="margin: 0;"> <span id="LC1422" 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="LC1423" class="line" lang="haskell"><span class="n" style="color: #333;">nodeScore</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccEnv</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2297" 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">@@ -2301,7 +2297,7 @@ addAppCtxt :: OccEnv -> [Arg CoreBndr] -> OccEnv</td>
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<pre style="margin: 0;"> <span id="LC2297" class="line" lang="haskell"><span class="n" style="color: #333;">addAppCtxt</span> <span class="n" style="color: #333;">env</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OccEnv</span> <span class="p">{</span> <span class="n" style="color: #333;">occ_one_shots</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ctxt</span> <span class="p">})</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;"> <span id="LC2298" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</span> <span class="p">{</span> <span class="n" style="color: #333;">occ_one_shots</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">replicate</span> <span class="p">(</span><span class="n" style="color: #333;">valArgCount</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">OneShotLam</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">ctxt</span> <span class="p">}</span></span>
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2299
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<pre style="margin: 0;"> <span id="LC2299" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2304" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">{</span>-</span></span>
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<pre style="margin: 0;">+<span id="LC2300" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">-------------------</span>-</span></span>
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2305
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<pre style="margin: 0;"> <span id="LC2301" class="line" lang="haskell"><span class="n" style="color: #333;">transClosureFV</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">VarEnv</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;">VarEnv</span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span></span>
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2306
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2302
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<pre style="margin: 0;"> <span id="LC2302" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If (f,g), (g,h) are in the input, then (f,h) is in the output</span></span>
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2307
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2303
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<pre style="margin: 0;"> <span id="LC2303" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- as well as (f,g), (g,h)</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">@@ -2317,7 +2313,7 @@ transClosureFV env</td>
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2317
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2313
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<pre style="margin: 0;"> <span id="LC2313" 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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">b</span><span class="p">,</span><span class="n" style="color: #333;">new_fvs</span><span class="p">))</span></span>
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2318
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2314
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<pre style="margin: 0;"> <span id="LC2314" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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2319
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<pre style="margin: 0;"> <span id="LC2315" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">new_fvs</span><span class="p">,</span> <span class="n" style="color: #333;">no_change_here</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendFvs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;">-<span id="LC2320" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">-}</span></span></span>
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2316
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<pre style="margin: 0;">+<span id="LC2316" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2317" 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="LC2318" class="line" lang="haskell"><span class="n" style="color: #333;">extendFvs_</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">VarEnv</span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span></span>
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<pre style="margin: 0;"> <span id="LC2319" class="line" lang="haskell"><span class="n" style="color: #333;">extendFvs_</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fst</span> <span class="p">(</span><span class="n" style="color: #333;">extendFvs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Discard the Bool flag</span></span>
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