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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>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3b2531f680c4d8e034d0b1936ef975648a2b4462">3b2531f6</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-09-09T16:43:31+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix the occurrence analyser

Ticket #18603 demonstrated that the occurrence analyser's
handling of

  local RULES for imported Ids

(which I now call IMP-RULES) was inadequate.  It led the simplifier
into an infnite loop by failing to label a binder as a loop breaker.

The main change in this commit is to treat IMP-RULES in a simple and
uniform way: as extra rules for the local binder.  See
  Note [IMP-RULES: local rules for imported functions]

This led to quite a bit of refactoring.  The result is still tricky,
but it's much better than before, and better documented I think.

Oh, and it fixes the bug.
</pre>
</li>
</ul>
<h4>4 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#448d7f6e0151c2014de38dead3a902f511c45b75">
compiler/GHC/Core/FVs.hs
</a>
</li>
<li class="file-stats">
<a href="#bac3d5159a5688007de3aa3f5c4e50569677b347">
compiler/GHC/Core/Opt/OccurAnal.hs
</a>
</li>
<li class="file-stats">
<a href="#d1d7de5bc3d2b577ac871114201f27e9ccc2f689">
<span class="new-file">
+
testsuite/tests/simplCore/should_compile/T18603.hs
</span>
</a>
</li>
<li class="file-stats">
<a href="#fc07c260b75644727a8cdc1af5c861a44d4bfb5e">
testsuite/tests/simplCore/should_compile/all.T
</a>
</li>
</ul>
<h4>Changes:</h4>
<li id="448d7f6e0151c2014de38dead3a902f511c45b75">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3b2531f680c4d8e034d0b1936ef975648a2b4462#448d7f6e0151c2014de38dead3a902f511c45b75"><strong>compiler/GHC/Core/FVs.hs</strong></a>
<hr>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="10" 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">@@ -10,16 +10,12 @@ Taken quite directly from the Peyton Jones/Lester paper.</td>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="cd">-- | A module concerned with finding the free variables of an expression.</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.Core.FVs</span> <span class="p">(</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- * Free variables of expressions and binding groups</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC13" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeVars</span><span class="p">,</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="14" 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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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeVars</span><span class="p">,</span><span class="idiff left">     </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">exprsFreeVars</span></span><span class="p"><span class="idiff right">,</span></span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeVarsDSet</span><span class="p">,</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC15" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeVarsList</span><span class="p">,</span></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="15" 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="LC16" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeIds</span><span class="p">,</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC17" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeIdsDSet</span><span class="p">,</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC18" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeIdsList</span><span class="p">,</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC19" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprsFreeIdsDSet</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC20" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprsFreeIdsList</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC21" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprsFreeVars</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC22" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprsFreeVarsList</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeVarsList</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">exprsFreeVarsList</span><span class="p">,</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeIds</span><span class="p">,</span>      <span class="nf" style="color: #900; font-weight: 600;">exprsFreeIds</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeIdsDSet</span><span class="p">,</span>  <span class="nf" style="color: #900; font-weight: 600;">exprsFreeIdsDSet</span><span class="p">,</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">exprFreeIdsList</span><span class="p">,</span>  <span class="nf" style="color: #900; font-weight: 600;">exprsFreeIdsList</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">bindFreeVars</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- * Selective free variables of expressions</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="126" 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="122" 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">@@ -126,6 +122,9 @@ exprFreeVarsList = fvVarList . exprFVs</td>
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<pre style="margin: 0;"> <span id="LC122" class="line" lang="haskell"><span class="n" style="color: #333;">exprFreeIds</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</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;">-- Find all locally-defined free Ids</span></span>
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<pre style="margin: 0;"> <span id="LC123" class="line" lang="haskell"><span class="n" style="color: #333;">exprFreeIds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprSomeFreeVars</span> <span class="n" style="color: #333;">isLocalId</span></span>
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<pre style="margin: 0;"> <span id="LC124" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC125" class="line" lang="haskell"><span class="n" style="color: #333;">exprsFreeIds</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IdSet</span>        <span class="c1" style="color: #998; font-style: italic;">-- Find all locally-defined free Ids</span></span>
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<pre style="margin: 0;">+<span id="LC126" class="line" lang="haskell"><span class="n" style="color: #333;">exprsFreeIds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprsSomeFreeVars</span> <span class="n" style="color: #333;">isLocalId</span></span>
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<pre style="margin: 0;">+<span id="LC127" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC128" class="line" lang="haskell"><span class="cd">-- | Find all locally-defined free Ids in an expression</span></span>
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<pre style="margin: 0;"> <span id="LC129" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- returning a deterministic set.</span></span>
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<pre style="margin: 0;"> <span id="LC130" class="line" lang="haskell"><span class="n" style="color: #333;">exprFreeIdsDSet</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DIdSet</span> <span class="c1" style="color: #998; font-style: italic;">-- Find all locally-defined free Ids</span></span>
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<br>
</li>
<li id="bac3d5159a5688007de3aa3f5c4e50569677b347">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3b2531f680c4d8e034d0b1936ef975648a2b4462#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">@@ -61,10 +61,15 @@ import Data.List</td>
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<pre style="margin: 0;"> <span id="LC61" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Here's the externally-callable interface:</span></span>
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<pre style="margin: 0;"> <span id="LC62" 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="LC63" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC64" class="line" lang="haskell"><span class="n" style="color: #333;">occurAnalyseExpr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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<pre style="margin: 0;">+<span id="LC65" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Do occurrence analysis, and discard occurrence info returned</span></span>
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<pre style="margin: 0;">+<span id="LC66" class="line" lang="haskell"><span class="n" style="color: #333;">occurAnalyseExpr</span> <span class="n" style="color: #333;">expr</span></span>
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<pre style="margin: 0;">+<span id="LC67" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">snd</span> <span class="p">(</span><span class="n" style="color: #333;">occAnal</span> <span class="n" style="color: #333;">initOccEnv</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC68" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"><span class="n" style="color: #333;">occurAnalysePgm</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Module</span>         <span class="c1" style="color: #998; font-style: italic;">-- Used only in debug output</span></span>
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<pre style="margin: 0;"> <span id="LC70" 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;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)</span>         <span class="c1" style="color: #998; font-style: italic;">-- Active unfoldings</span></span>
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<pre style="margin: 0;"> <span id="LC71" 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;">Activation</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Active rules</span></span>
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<pre style="margin: 0;">-<span id="LC67" 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;">CoreRule</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC72" 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;">CoreRule</span><span class="p">]</span><span class="idiff left">           </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- Local rules for imported Ids</span></span></span>
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<pre style="margin: 0;"> <span id="LC73" class="line" lang="haskell">                <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreProgram</span></span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell"><span class="n" style="color: #333;">occurAnalysePgm</span> <span class="n" style="color: #333;">this_mod</span> <span class="n" style="color: #333;">active_unf</span> <span class="n" style="color: #333;">active_rule</span> <span class="n" style="color: #333;">imp_rules</span> <span class="n" style="color: #333;">binds</span></span>
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<pre style="margin: 0;"> <span id="LC75" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isEmptyDetails</span> <span class="n" style="color: #333;">final_usage</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">@@ -95,15 +100,21 @@ occurAnalysePgm this_mod active_unf active_rule imp_rules binds</td>
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<pre style="margin: 0;"> <span id="LC100" class="line" lang="haskell">    <span class="n" style="color: #333;">initial_uds</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="p">(</span><span class="n" style="color: #333;">rulesFreeVars</span> <span class="n" style="color: #333;">imp_rules</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC101" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- The RULES declarations keep things alive!</span></span>
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<pre style="margin: 0;"> <span id="LC102" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC98" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Note [Preventing loops due to imported functions rules]</span></span>
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<pre style="margin: 0;">-<span id="LC99" class="line" lang="haskell">    <span class="n" style="color: #333;">imp_rule_edges</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="p">(</span><span class="n" style="color: #333;">plusVarEnv_C</span> <span class="n" style="color: #333;">unionVarSet</span><span class="p">)</span> <span class="n" style="color: #333;">emptyVarEnv</span></span>
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<pre style="margin: 0;">-<span id="LC100" class="line" lang="haskell">                            <span class="p">[</span> <span class="n" style="color: #333;">mapVarEnv</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="n" style="color: #333;">maps_to</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC101" class="line" lang="haskell">                                <span class="n" style="color: #333;">getUniqSet</span> <span class="p">(</span><span class="n" style="color: #333;">exprFreeIds</span> <span class="n" style="color: #333;">arg</span> <span class="p">`</span><span class="n" style="color: #333;">delVarSetList</span><span class="p">`</span> <span class="n" style="color: #333;">ru_bndrs</span> <span class="n" style="color: #333;">imp_rule</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC102" class="line" lang="haskell">                            <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">imp_rule</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">imp_rules</span></span>
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<pre style="margin: 0;">-<span id="LC103" 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;">isBuiltinRule</span> <span class="n" style="color: #333;">imp_rule</span><span class="p">)</span>  <span class="c1" style="color: #998; font-style: italic;">-- See Note [Plugin rules]</span></span>
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<pre style="margin: 0;">-<span id="LC104" class="line" lang="haskell">                            <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">maps_to</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprFreeIds</span> <span class="p">(</span><span class="n" style="color: #333;">ru_rhs</span> <span class="n" style="color: #333;">imp_rule</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC105" class="line" lang="haskell">                                             <span class="p">`</span><span class="n" style="color: #333;">delVarSetList</span><span class="p">`</span> <span class="n" style="color: #333;">ru_bndrs</span> <span class="n" style="color: #333;">imp_rule</span></span>
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<pre style="margin: 0;">-<span id="LC106" class="line" lang="haskell">                            <span class="p">,</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ru_args</span> <span class="n" style="color: #333;">imp_rule</span> <span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC103" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- imp_rule_edges maps a top-level local binder 'f' to the</span></span>
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<pre style="margin: 0;">+<span id="LC104" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- RHS free vars of any IMP-RULE, a local RULE for an imported function,</span></span>
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<pre style="margin: 0;">+<span id="LC105" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- where 'f' appears on the LHS</span></span>
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<pre style="margin: 0;">+<span id="LC106" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--   e.g.  RULE foldr f = blah</span></span>
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<pre style="margin: 0;">+<span id="LC107" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--         imp_rule_edges contains f :-> fvs(blah)</span></span>
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<pre style="margin: 0;">+<span id="LC108" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- We treat such RULES as extra rules for 'f'</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC109" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Preventing loops due to imported functions rules]</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC110" class="line" lang="haskell">    <span class="n" style="color: #333;">imp_rule_edges</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ImpRuleEdges</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC111" class="line" lang="haskell">    <span class="n" style="color: #333;">imp_rule_edges</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="p">(</span><span class="n" style="color: #333;">plusVarEnv_C</span> <span class="p">(</span><span class="o" style="font-weight: 600;">++</span><span class="p">))</span> <span class="n" style="color: #333;">emptyVarEnv</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC112" class="line" lang="haskell">                           <span class="p">[</span> <span class="n" style="color: #333;">mapVarEnv</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="p">[(</span><span class="n" style="color: #333;">act</span><span class="p">,</span><span class="n" style="color: #333;">rhs_fvs</span><span class="p">)])</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">getUniqSet</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC113" class="line" lang="haskell">                             <span class="n" style="color: #333;">exprsFreeIds</span> <span class="n" style="color: #333;">args</span> <span class="p">`</span><span class="n" style="color: #333;">delVarSetList</span><span class="p">`</span> <span class="n" style="color: #333;">bndrs</span></span>
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<pre style="margin: 0;">+<span id="LC114" class="line" lang="haskell">                           <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Rule</span> <span class="p">{</span> <span class="n" style="color: #333;">ru_act</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">act</span><span class="p">,</span> <span class="n" style="color: #333;">ru_bndrs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bndrs</span></span>
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<pre style="margin: 0;">+<span id="LC115" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ru_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">ru_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">imp_rules</span></span>
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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell">                                   <span class="c1" style="color: #998; font-style: italic;">-- Not BuiltinRules; see Note [Plugin rules]</span></span>
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<pre style="margin: 0;">+<span id="LC117" class="line" lang="haskell">                           <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">rhs_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprFreeIds</span> <span class="n" style="color: #333;">rhs</span> <span class="p">`</span><span class="n" style="color: #333;">delVarSetList</span><span class="p">`</span> <span class="n" style="color: #333;">bndrs</span> <span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC118" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC119" class="line" lang="haskell">    <span class="n" style="color: #333;">go</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreBind</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;">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="LC120" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -115,297 +126,64 @@ occurAnalysePgm this_mod active_unf active_rule imp_rules binds</td>
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<pre style="margin: 0;"> <span id="LC126" class="line" lang="haskell">           <span class="p">(</span><span class="n" style="color: #333;">final_usage</span><span class="p">,</span> <span class="n" style="color: #333;">bind'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalBind</span> <span class="n" style="color: #333;">env</span> <span class="kt" style="color: #458; font-weight: 600;">TopLevel</span> <span class="n" style="color: #333;">imp_rule_edges</span> <span class="n" style="color: #333;">bind</span></span>
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<pre style="margin: 0;"> <span id="LC127" class="line" lang="haskell">                                              <span class="n" style="color: #333;">bs_usage</span></span>
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<pre style="margin: 0;"> <span id="LC128" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC118" class="line" lang="haskell"><span class="n" style="color: #333;">occurAnalyseExpr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>
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<pre style="margin: 0;">-<span id="LC119" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Do occurrence analysis, and discard occurrence info returned</span></span>
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<pre style="margin: 0;">-<span id="LC120" class="line" lang="haskell"><span class="n" style="color: #333;">occurAnalyseExpr</span> <span class="n" style="color: #333;">expr</span></span>
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<pre style="margin: 0;">-<span id="LC121" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">snd</span> <span class="p">(</span><span class="n" style="color: #333;">occAnal</span> <span class="n" style="color: #333;">initOccEnv</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC122" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC123" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Plugin rules]</span></span>
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<pre style="margin: 0;">-<span id="LC124" 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="LC125" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Conal Elliott (#11651) built a GHC plugin that added some</span></span>
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<pre style="margin: 0;">-<span id="LC126" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">BuiltinRules (for imported Ids) to the mg_rules field of ModGuts, to</span></span>
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<pre style="margin: 0;">-<span id="LC127" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">do some domain-specific transformations that could not be expressed</span></span>
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<pre style="margin: 0;">-<span id="LC128" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">with an ordinary pattern-matching CoreRule.  But then we can't extract</span></span>
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<pre style="margin: 0;">-<span id="LC129" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the dependencies (in imp_rule_edges) from ru_rhs etc, because a</span></span>
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<pre style="margin: 0;">-<span id="LC130" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">BuiltinRule doesn't have any of that stuff.</span></span>
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<pre style="margin: 0;">-<span id="LC131" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC132" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So we simply assume that BuiltinRules have no dependencies, and filter</span></span>
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<pre style="margin: 0;">-<span id="LC133" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">them out from the imp_rule_edges comprehension.</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC134" 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="LC135" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC136" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC137" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC129" 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="LC130" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC139" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                Bindings</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC131" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                IMP-RULES</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC132" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         Local rules for imported functions</span></span>
</pre>
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133
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<pre style="margin: 0;"> <span id="LC133" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="141" 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">
141
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC141" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="142" 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">
142
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC142" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="143" 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">
143
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC143" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Recursive bindings: the grand plan]</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="144" 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">
144
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC144" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="145" 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">
145
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC145" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When we come across a binding group</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="146" 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">
146
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC146" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  Rec { x1 = r1; ...; xn = rn }</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="147" 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">
147
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC147" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we treat it like this (occAnalRecBind):</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="148" 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">
148
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC148" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="149" 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">
149
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<pre style="margin: 0;">-<span id="LC149" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1. Occurrence-analyse each right hand side, and build a</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="150" 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">
150
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC150" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   "Details" for each binding to capture the results.</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="151" 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">
151
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC151" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="152" 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="LC152" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Wrap the details in a Node (details, node-id, dep-node-ids),</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="153" 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">
153
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC153" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   where node-id is just the unique of the binder, and</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="154" 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">
154
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC154" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   dep-node-ids lists all binders on which this binding depends.</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="155" 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">
155
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC155" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   We'll call these the "scope edges".</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="156" 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">
156
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC156" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   See Note [Forming the Rec groups].</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="157" 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">
157
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC157" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="158" 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">
158
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC158" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   All this is done by makeNode.</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="159" 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">
159
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC159" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="160" 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">
160
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<pre style="margin: 0;">-<span id="LC160" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. Do SCC-analysis on these Nodes.  Each SCC will become a new Rec or</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC161" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   NonRec.  The key property is that every free variable of a binding</span></span>
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<pre style="margin: 0;">-<span id="LC162" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   is accounted for by the scope edges, so that when we are done</span></span>
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<pre style="margin: 0;">-<span id="LC163" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   everything is still in scope.</span></span>
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<pre style="margin: 0;">-<span id="LC164" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC165" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">3. For each Cyclic SCC of the scope-edge SCC-analysis in (2), we</span></span>
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<pre style="margin: 0;">-<span id="LC166" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   identify suitable loop-breakers to ensure that inlining terminates.</span></span>
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<pre style="margin: 0;">-<span id="LC167" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   This is done by occAnalRec.</span></span>
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<pre style="margin: 0;">-<span id="LC168" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC169" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">4. To do so we form a new set of Nodes, with the same details, but</span></span>
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<pre style="margin: 0;">-<span id="LC170" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   different edges, the "loop-breaker nodes". The loop-breaker nodes</span></span>
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<pre style="margin: 0;">-<span id="LC171" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   have both more and fewer dependencies than the scope edges</span></span>
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<pre style="margin: 0;">-<span id="LC172" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   (see Note [Choosing loop breakers])</span></span>
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<pre style="margin: 0;">-<span id="LC173" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC174" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   More edges: if f calls g, and g has an active rule that mentions h</span></span>
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<pre style="margin: 0;">-<span id="LC175" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">               then we add an edge from f -> h</span></span>
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<pre style="margin: 0;">-<span id="LC176" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC177" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Fewer edges: we only include dependencies on active rules, on rule</span></span>
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<pre style="margin: 0;">-<span id="LC178" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                RHSs (not LHSs) and if there is an INLINE pragma only</span></span>
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<pre style="margin: 0;">-<span id="LC179" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                on the stable unfolding (and vice versa).  The scope</span></span>
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<pre style="margin: 0;">-<span id="LC180" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                edges must be much more inclusive.</span></span>
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181
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<pre style="margin: 0;">-<span id="LC181" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC182" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">5.  The "weak fvs" of a node are, by definition:</span></span>
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<pre style="margin: 0;">-<span id="LC183" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       the scope fvs - the loop-breaker fvs</span></span>
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<pre style="margin: 0;">-<span id="LC184" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    See Note [Weak loop breakers], and the nd_weak field of Details</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC185" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC186" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">6.  Having formed the loop-breaker nodes</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC187" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC188" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Dead code]</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC189" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="190" 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="LC190" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Dropping dead code for a cyclic Strongly Connected Component is done</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC191" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in a very simple way:</span></span>
</pre>
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192
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<pre style="margin: 0;">-<span id="LC192" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="193" 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="LC193" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        the entire SCC is dropped if none of its binders are mentioned</span></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC194" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        in the body; otherwise the whole thing is kept.</span></span>
</pre>
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195
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<pre style="margin: 0;">-<span id="LC195" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="196" 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="LC196" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The key observation is that dead code elimination happens after</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC197" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">dependency analysis: so 'occAnalBind' processes SCCs instead of the</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC198" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">original term's binding groups.</span></span>
</pre>
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199
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<pre style="margin: 0;">-<span id="LC199" class="line" lang="haskell"></span>
</pre>
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200
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<pre style="margin: 0;">-<span id="LC200" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Thus 'occAnalBind' does indeed drop 'f' in an example like</span></span>
</pre>
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201
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<pre style="margin: 0;">-<span id="LC201" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC202" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        letrec f = ...g...</span></span>
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<pre style="margin: 0;">-<span id="LC203" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">               g = ...(...g...)...</span></span>
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<pre style="margin: 0;">-<span id="LC204" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        in</span></span>
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<pre style="margin: 0;">-<span id="LC205" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">           ...g...</span></span>
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<pre style="margin: 0;">-<span id="LC206" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC207" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">when 'g' no longer uses 'f' at all (eg 'f' does not occur in a RULE in</span></span>
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<pre style="margin: 0;">-<span id="LC208" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">'g'). 'occAnalBind' first consumes 'CyclicSCC g' and then it consumes</span></span>
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<pre style="margin: 0;">-<span id="LC209" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">'AcyclicSCC f', where 'body_usage' won't contain 'f'.</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC210" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC211" 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="LC212" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Forming Rec groups]</span></span>
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<pre style="margin: 0;">-<span id="LC213" 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="LC214" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We put bindings {f = ef; g = eg } in a Rec group if "f uses g"</span></span>
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<pre style="margin: 0;">-<span id="LC215" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and "g uses f", no matter how indirectly.  We do a SCC analysis</span></span>
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<pre style="margin: 0;">-<span id="LC216" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">with an edge f -> g if "f uses g".</span></span>
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<pre style="margin: 0;">-<span id="LC217" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC218" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">More precisely, "f uses g" iff g should be in scope wherever f is.</span></span>
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<pre style="margin: 0;">-<span id="LC219" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">That is, g is free in:</span></span>
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<pre style="margin: 0;">-<span id="LC220" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  a) the rhs 'ef'</span></span>
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<td class="diff-line-num old old_line" data-linenumber="221" 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="LC221" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  b) or the RHS of a rule for f (Note [Rules are extra RHSs])</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC222" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  c) or the LHS or a rule for f (Note [Rule dependency info])</span></span>
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<pre style="margin: 0;">-<span id="LC223" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC224" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">These conditions apply regardless of the activation of the RULE (eg it might be</span></span>
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<pre style="margin: 0;">-<span id="LC225" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">inactive in this phase but become active later).  Once a Rec is broken up</span></span>
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<pre style="margin: 0;">-<span id="LC226" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">it can never be put back together, so we must be conservative.</span></span>
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<pre style="margin: 0;">-<span id="LC227" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC228" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The principle is that, regardless of rule firings, every variable is</span></span>
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<pre style="margin: 0;">-<span id="LC229" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">always in scope.</span></span>
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<pre style="margin: 0;">-<span id="LC230" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC231" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Note [Rules are extra RHSs]</span></span>
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<pre style="margin: 0;">-<span id="LC232" 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="LC233" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    A RULE for 'f' is like an extra RHS for 'f'. That way the "parent"</span></span>
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<pre style="margin: 0;">-<span id="LC234" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    keeps the specialised "children" alive.  If the parent dies</span></span>
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<pre style="margin: 0;">-<span id="LC235" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (because it isn't referenced any more), then the children will die</span></span>
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<pre style="margin: 0;">-<span id="LC236" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    too (unless they are already referenced directly).</span></span>
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<pre style="margin: 0;">-<span id="LC237" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC238" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    To that end, we build a Rec group for each cyclic strongly</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC239" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    connected component,</span></span>
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<pre style="margin: 0;">-<span id="LC240" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        *treating f's rules as extra RHSs for 'f'*.</span></span>
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<pre style="margin: 0;">-<span id="LC241" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    More concretely, the SCC analysis runs on a graph with an edge</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC242" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    from f -> g iff g is mentioned in</span></span>
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<pre style="margin: 0;">-<span id="LC243" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        (a) f's rhs</span></span>
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<pre style="margin: 0;">-<span id="LC244" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        (b) f's RULES</span></span>
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<pre style="margin: 0;">-<span id="LC245" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    These are rec_edges.</span></span>
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<pre style="margin: 0;">-<span id="LC246" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC247" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Under (b) we include variables free in *either* LHS *or* RHS of</span></span>
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<pre style="margin: 0;">-<span id="LC248" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    the rule.  The former might seems silly, but see Note [Rule</span></span>
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<pre style="margin: 0;">-<span id="LC249" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    dependency info].  So in Example [eftInt], eftInt and eftIntFB</span></span>
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<pre style="margin: 0;">-<span id="LC250" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    will be put in the same Rec, even though their 'main' RHSs are</span></span>
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<pre style="margin: 0;">-<span id="LC251" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    both non-recursive.</span></span>
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<pre style="margin: 0;">-<span id="LC252" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC253" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Note [Rule dependency info]</span></span>
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<pre style="margin: 0;">-<span id="LC254" 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="LC255" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    The VarSet in a RuleInfo is used for dependency analysis in the</span></span>
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<pre style="margin: 0;">-<span id="LC256" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    occurrence analyser.  We must track free vars in *both* lhs and rhs.</span></span>
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<pre style="margin: 0;">-<span id="LC257" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Hence use of idRuleVars, rather than idRuleRhsVars in occAnalBind.</span></span>
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<pre style="margin: 0;">-<span id="LC258" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Why both? Consider</span></span>
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<pre style="margin: 0;">-<span id="LC259" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        x = y</span></span>
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<pre style="margin: 0;">-<span id="LC260" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        RULE f x = v+4</span></span>
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<pre style="margin: 0;">-<span id="LC261" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Then if we substitute y for x, we'd better do so in the</span></span>
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<pre style="margin: 0;">-<span id="LC262" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    rule's LHS too, so we'd better ensure the RULE appears to mention 'x'</span></span>
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<pre style="margin: 0;">-<span id="LC263" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    as well as 'v'</span></span>
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<pre style="margin: 0;">-<span id="LC264" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC265" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Note [Rules are visible in their own rec group]</span></span>
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<pre style="margin: 0;">-<span id="LC266" 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="LC267" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    We want the rules for 'f' to be visible in f's right-hand side.</span></span>
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<pre style="margin: 0;">-<span id="LC268" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    And we'd like them to be visible in other functions in f's Rec</span></span>
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<pre style="margin: 0;">-<span id="LC269" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    group.  E.g. in Note [Specialisation rules] we want f' rule</span></span>
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<pre style="margin: 0;">-<span id="LC270" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    to be visible in both f's RHS, and fs's RHS.</span></span>
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<pre style="margin: 0;">-<span id="LC271" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC272" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    This means that we must simplify the RULEs first, before looking</span></span>
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<pre style="margin: 0;">-<span id="LC273" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    at any of the definitions.  This is done by Simplify.simplRecBind,</span></span>
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<pre style="margin: 0;">-<span id="LC274" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    when it calls addLetIdInfo.</span></span>
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<pre style="margin: 0;">-<span id="LC275" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC276" 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="LC277" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Choosing loop breakers]</span></span>
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<pre style="margin: 0;">-<span id="LC278" 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="LC279" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Loop breaking is surprisingly subtle.  First read the section 4 of</span></span>
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<pre style="margin: 0;">-<span id="LC280" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">"Secrets of the GHC inliner".  This describes our basic plan.</span></span>
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<pre style="margin: 0;">-<span id="LC281" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We avoid infinite inlinings by choosing loop breakers, and</span></span>
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<pre style="margin: 0;">-<span id="LC282" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">ensuring that a loop breaker cuts each loop.</span></span>
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<pre style="margin: 0;">-<span id="LC283" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC284" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">See also Note [Inlining and hs-boot files] in GHC.Core.ToIface, which</span></span>
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<pre style="margin: 0;">-<span id="LC285" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">deals with a closely related source of infinite loops.</span></span>
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<pre style="margin: 0;">-<span id="LC286" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC287" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Fundamentally, we do SCC analysis on a graph.  For each recursive</span></span>
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<pre style="margin: 0;">-<span id="LC288" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">group we choose a loop breaker, delete all edges to that node,</span></span>
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<pre style="margin: 0;">-<span id="LC289" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">re-analyse the SCC, and iterate.</span></span>
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<pre style="margin: 0;">-<span id="LC290" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC291" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But what is the graph?  NOT the same graph as was used for Note</span></span>
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<pre style="margin: 0;">-<span id="LC292" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">[Forming Rec groups]!  In particular, a RULE is like an equation for</span></span>
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<pre style="margin: 0;">-<span id="LC293" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">'f' that is *always* inlined if it is applicable.  We do *not* disable</span></span>
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<pre style="margin: 0;">-<span id="LC294" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">rules for loop-breakers.  It's up to whoever makes the rules to make</span></span>
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<pre style="margin: 0;">-<span id="LC295" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">sure that the rules themselves always terminate.  See Note [Rules for</span></span>
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<pre style="margin: 0;">-<span id="LC296" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">recursive functions] in GHC.Core.Opt.Simplify</span></span>
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<pre style="margin: 0;">-<span id="LC297" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC298" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Hence, if</span></span>
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<pre style="margin: 0;">-<span id="LC299" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    f's RHS (or its INLINE template if it has one) mentions g, and</span></span>
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<pre style="margin: 0;">-<span id="LC300" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    g has a RULE that mentions h, and</span></span>
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<pre style="margin: 0;">-<span id="LC301" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    h has a RULE that mentions f</span></span>
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<pre style="margin: 0;">-<span id="LC302" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC303" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">then we *must* choose f to be a loop breaker.  Example: see Note</span></span>
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<pre style="margin: 0;">-<span id="LC304" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">[Specialisation rules].</span></span>
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<pre style="margin: 0;">-<span id="LC305" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC306" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In general, take the free variables of f's RHS, and augment it with</span></span>
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<pre style="margin: 0;">-<span id="LC307" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">all the variables reachable by RULES from those starting points.  That</span></span>
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<pre style="margin: 0;">-<span id="LC308" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is the whole reason for computing rule_fv_env in occAnalBind.  (Of</span></span>
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<pre style="margin: 0;">-<span id="LC309" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">course we only consider free vars that are also binders in this Rec</span></span>
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<pre style="margin: 0;">-<span id="LC310" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">group.)  See also Note [Finding rule RHS free vars]</span></span>
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<pre style="margin: 0;">-<span id="LC311" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC312" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that when we compute this rule_fv_env, we only consider variables</span></span>
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<pre style="margin: 0;">-<span id="LC313" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">free in the *RHS* of the rule, in contrast to the way we build the</span></span>
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<pre style="margin: 0;">-<span id="LC314" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Rec group in the first place (Note [Rule dependency info])</span></span>
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<pre style="margin: 0;">-<span id="LC315" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC316" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that if 'g' has RHS that mentions 'w', we should add w to</span></span>
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<pre style="margin: 0;">-<span id="LC317" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">g's loop-breaker edges.  More concretely there is an edge from f -> g</span></span>
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<pre style="margin: 0;">-<span id="LC318" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">iff</span></span>
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<pre style="margin: 0;">-<span id="LC319" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        (a) g is mentioned in f's RHS `xor` f's INLINE rhs</span></span>
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<pre style="margin: 0;">-<span id="LC320" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            (see Note [Inline rules])</span></span>
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<pre style="margin: 0;">-<span id="LC321" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        (b) or h is mentioned in f's RHS, and</span></span>
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<pre style="margin: 0;">-<span id="LC322" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            g appears in the RHS of an active RULE of h</span></span>
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<pre style="margin: 0;">-<span id="LC323" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            or a transitive sequence of active rules starting with h</span></span>
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<pre style="margin: 0;">-<span id="LC324" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC325" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Why "active rules"?  See Note [Finding rule RHS free vars]</span></span>
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<pre style="margin: 0;">+<span id="LC134" 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="LC135" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC327" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that in Example [eftInt], *neither* eftInt *nor* eftIntFB is</span></span>
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<pre style="margin: 0;">-<span id="LC328" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">chosen as a loop breaker, because their RHSs don't mention each other.</span></span>
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<pre style="margin: 0;">-<span id="LC329" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">And indeed both can be inlined safely.</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC330" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC331" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note again that the edges of the graph we use for computing loop breakers</span></span>
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<pre style="margin: 0;">-<span id="LC332" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">are not the same as the edges we use for computing the Rec blocks.</span></span>
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<pre style="margin: 0;">-<span id="LC333" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">That's why we compute</span></span>
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<pre style="margin: 0;">-<span id="LC334" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC335" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">- rec_edges          for the Rec block analysis</span></span>
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<pre style="margin: 0;">-<span id="LC336" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">- loop_breaker_nodes for the loop breaker analysis</span></span>
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<pre style="margin: 0;">-<span id="LC337" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC338" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Note [Finding rule RHS free vars]</span></span>
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<pre style="margin: 0;">-<span id="LC339" 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="LC340" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Consider this real example from Data Parallel Haskell</span></span>
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<pre style="margin: 0;">-<span id="LC341" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         tagZero :: Array Int -> Array Tag</span></span>
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<pre style="margin: 0;">-<span id="LC342" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         {-# INLINE [1] tagZeroes #-}</span></span>
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<pre style="margin: 0;">-<span id="LC343" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         tagZero xs = pmap (\x -> fromBool (x==0)) xs</span></span>
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<pre style="margin: 0;">-<span id="LC344" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC345" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         {-# RULES "tagZero" [~1] forall xs n.</span></span>
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<pre style="margin: 0;">-<span id="LC346" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">             pmap fromBool <blah blah> = tagZero xs #-}</span></span>
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<pre style="margin: 0;">-<span id="LC347" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    So tagZero's RHS mentions pmap, and pmap's RULE mentions tagZero.</span></span>
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<pre style="margin: 0;">-<span id="LC348" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    However, tagZero can only be inlined in phase 1 and later, while</span></span>
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<pre style="margin: 0;">-<span id="LC349" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    the RULE is only active *before* phase 1.  So there's no problem.</span></span>
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<pre style="margin: 0;">+<span id="LC136" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">ImpRuleEdges</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IdEnv</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Activation</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span><span class="p">)]</span></span>
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<pre style="margin: 0;">+<span id="LC137" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Mapping from a local Id 'f' to info about its IMP-RULES,</span></span>
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<pre style="margin: 0;">+<span id="LC138" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- i.e. /local/ rules for an imported Id that mention 'f' on the LHS</span></span>
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<pre style="margin: 0;">+<span id="LC139" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- We record (a) its Activation and (b) the RHS free vars</span></span>
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<pre style="margin: 0;">+<span id="LC140" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [IMP-RULES: local rules for imported functions]</span></span>
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<pre style="margin: 0;"> <span id="LC141" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC351" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    To make this work, we look for the RHS free vars only for</span></span>
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<pre style="margin: 0;">-<span id="LC352" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    *active* rules. That's the reason for the occ_rule_act field</span></span>
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<pre style="margin: 0;">-<span id="LC353" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    of the OccEnv.</span></span>
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<pre style="margin: 0;">-<span id="LC354" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC355" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Note [Weak loop breakers]</span></span>
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<pre style="margin: 0;">-<span id="LC356" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    ~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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357
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC357" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    There is a last nasty wrinkle.  Suppose we have</span></span>
</pre>
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358
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<pre style="margin: 0;">-<span id="LC358" class="line" lang="haskell"></span>
</pre>
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359
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<pre style="margin: 0;">-<span id="LC359" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        Rec { f = f_rhs</span></span>
</pre>
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360
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC360" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">              RULE f [] = g</span></span>
</pre>
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361
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC361" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="362" 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="LC362" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">              h = h_rhs</span></span>
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<td class="diff-line-num old old_line" data-linenumber="363" 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">
363
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC363" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">              g = h</span></span>
</pre>
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364
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<pre style="margin: 0;">-<span id="LC364" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">              ...more...</span></span>
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365
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC365" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        }</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="366" 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">
366
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC366" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="367" 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">
367
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC367" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Remember that we simplify the RULES before any RHS (see Note</span></span>
</pre>
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368
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC368" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    [Rules are visible in their own rec group] above).</span></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC369" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC370" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    So we must *not* postInlineUnconditionally 'g', even though</span></span>
</pre>
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371
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC371" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    its RHS turns out to be trivial.  (I'm assuming that 'g' is</span></span>
</pre>
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372
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC372" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    not chosen as a loop breaker.)  Why not?  Because then we</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="373" 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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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC373" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    drop the binding for 'g', which leaves it out of scope in the</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="374" 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">
374
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC374" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    RULE!</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="375" 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">
375
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC375" class="line" lang="haskell"></span>
</pre>
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376
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC376" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Here's a somewhat different example of the same thing</span></span>
</pre>
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377
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<pre style="margin: 0;">-<span id="LC377" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        Rec { g = h</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="378" 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">
378
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC378" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            ; h = ...f...</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="379" 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">
379
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC379" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            ; f = f_rhs</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="380" 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">
380
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC380" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">              RULE f [] = g }</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="381" 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">
381
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC381" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Here the RULE is "below" g, but we *still* can't postInlineUnconditionally</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="382" 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">
382
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC382" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    g, because the RULE for f is active throughout.  So the RHS of h</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="383" 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">
383
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC383" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    might rewrite to     h = ...g...</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="384" 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">
384
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<td class="diff-line-num new_line old" data-linenumber="142" 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="LC384" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    So g must remain in scope in the output program!</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="385" 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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142
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<pre style="margin: 0;">+<span id="LC142" class="line" lang="haskell"><span class="n" style="color: #333;">noImpRuleEdges</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ImpRuleEdges</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="385" 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="143" 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">
143
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<pre style="margin: 0;">+<span id="LC143" class="line" lang="haskell"><span class="n" style="color: #333;">noImpRuleEdges</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyVarEnv</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="385" 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">
385
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<td class="diff-line-num new_line" data-linenumber="144" 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">
144
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<pre style="margin: 0;"> <span id="LC144" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="386" 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">
386
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<td class="diff-line-num new_line old" data-linenumber="145" 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="LC386" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    We "solve" this by:</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="387" 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="145" 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">
145
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<pre style="margin: 0;">+<span id="LC145" class="line" lang="haskell"><span class="n" style="color: #333;">lookupImpRules</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ImpRuleEdges</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="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Activation</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">VarSet</span><span class="p">)]</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="387" 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="146" 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">
146
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<pre style="margin: 0;">+<span id="LC146" class="line" lang="haskell"><span class="n" style="color: #333;">lookupImpRules</span> <span class="n" style="color: #333;">imp_rule_edges</span> <span class="n" style="color: #333;">bndr</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="387" 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="147" 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">
147
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<pre style="margin: 0;">+<span id="LC147" 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;">lookupVarEnv</span> <span class="n" style="color: #333;">imp_rule_edges</span> <span class="n" style="color: #333;">bndr</span> <span class="kr" style="font-weight: 600;">of</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="387" 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="148" 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">
148
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<pre style="margin: 0;">+<span id="LC148" 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="kt" style="color: #458; font-weight: 600;">[]</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="387" 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="149" 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">
149
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<pre style="margin: 0;">+<span id="LC149" 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;">vs</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="387" 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="150" 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">
150
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<pre style="margin: 0;">+<span id="LC150" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="387" 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="151" 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">
151
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<pre style="margin: 0;">+<span id="LC151" class="line" lang="haskell"><span class="n" style="color: #333;">impRulesScopeUsage</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Activation</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">VarSet</span><span class="p">)]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC152" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Variable mentioned in RHS of an IMP-RULE for the bndr,</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="153" 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">
153
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<pre style="margin: 0;">+<span id="LC153" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- whether active or not</span></span>
</pre>
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154
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<pre style="margin: 0;">+<span id="LC154" class="line" lang="haskell"><span class="n" style="color: #333;">impRulesScopeUsage</span> <span class="n" style="color: #333;">imp_rules_info</span></span>
</pre>
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155
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<pre style="margin: 0;">+<span id="LC155" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;">emptyDetails</span> <span class="n" style="color: #333;">imp_rules_info</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="156" 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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<pre style="margin: 0;">+<span id="LC156" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC157" class="line" lang="haskell">    <span class="n" style="color: #333;">add</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="n" style="color: #333;">vs</span><span class="p">)</span> <span class="n" style="color: #333;">usage</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addManyOccs</span> <span class="n" style="color: #333;">usage</span> <span class="n" style="color: #333;">vs</span></span>
</pre>
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387
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158
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<pre style="margin: 0;"> <span id="LC158" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="159" 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="LC388" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        Make g a "weak" loop breaker (OccInfo = IAmLoopBreaker True)</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC389" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        iff g is a "missing free variable" of the Rec group</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC159" class="line" lang="haskell"><span class="n" style="color: #333;">impRulesActiveFvs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</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 class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC160" 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;">Activation</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">VarSet</span><span class="p">)]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC161" class="line" lang="haskell"><span class="n" style="color: #333;">impRulesActiveFvs</span> <span class="n" style="color: #333;">is_active</span> <span class="n" style="color: #333;">bndr_set</span> <span class="n" style="color: #333;">vs</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="162" 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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<pre style="margin: 0;">+<span id="LC162" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">add</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="n" style="color: #333;">vs</span> <span class="p">`</span><span class="n" style="color: #333;">intersectVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">bndr_set</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="163" 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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<pre style="margin: 0;">+<span id="LC163" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC164" class="line" lang="haskell">    <span class="n" style="color: #333;">add</span> <span class="p">(</span><span class="n" style="color: #333;">act</span><span class="p">,</span><span class="n" style="color: #333;">vs</span><span class="p">)</span> <span class="n" style="color: #333;">acc</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">is_active</span> <span class="n" style="color: #333;">act</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vs</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">acc</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="165" 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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<pre style="margin: 0;">+<span id="LC165" 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;">acc</span></span>
</pre>
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390
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<td class="diff-line-num new_line" data-linenumber="166" 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">
166
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<pre style="margin: 0;"> <span id="LC166" class="line" lang="haskell"></span>
</pre>
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391
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<td class="diff-line-num new_line old" data-linenumber="167" 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="LC391" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    A "missing free variable" x is one that is mentioned in an RHS or</span></span>
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392
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<pre style="margin: 0;">-<span id="LC392" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    INLINE or RULE of a binding in the Rec group, but where the</span></span>
</pre>
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393
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<td class="diff-line-num new_line old" data-linenumber="167" 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="LC393" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    dependency on x may not show up in the loop_breaker_nodes (see</span></span>
</pre>
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394
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<pre style="margin: 0;">-<span id="LC394" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    note [Choosing loop breakers} above).</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="395" 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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167
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<pre style="margin: 0;">+<span id="LC167" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [IMP-RULES: local rules for imported functions]</span></span>
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<td class="diff-line-num new old_line" data-linenumber="395" 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="168" 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">
168
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<pre style="margin: 0;">+<span id="LC168" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="395" 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="169" 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">
169
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<pre style="margin: 0;">+<span id="LC169" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We quite often have</span></span>
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<td class="diff-line-num new old_line" data-linenumber="395" 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="170" 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">
170
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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * A /local/ rule</span></span>
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<td class="diff-line-num new old_line" data-linenumber="395" 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="171" 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">
171
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<pre style="margin: 0;">+<span id="LC171" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * for an /imported/ function</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="172" 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">
172
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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">like this:</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="173" 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">
173
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<pre style="margin: 0;">+<span id="LC173" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  foo x = blah</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="174" 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">
174
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<pre style="margin: 0;">+<span id="LC174" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  {-# RULE "map/foo" forall xs. map foo xs = xs #-}</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="175" 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">
175
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<pre style="margin: 0;">+<span id="LC175" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We call them IMP-RULES.  They are important in practice, and occur a</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="176" 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">
176
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<pre style="margin: 0;">+<span id="LC176" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">lot in the libraries.</span></span>
</pre>
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395
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<td class="diff-line-num new_line" data-linenumber="177" 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">
177
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<pre style="margin: 0;"> <span id="LC177" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="396" 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">
396
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<td class="diff-line-num new_line old" data-linenumber="178" 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="LC396" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    A normal "strong" loop breaker has IAmLoopBreaker False.  So</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="397" 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="178" 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">
178
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<pre style="margin: 0;">+<span id="LC178" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">IMP-RULES are held in mg_rules of ModGuts, and passed in to</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="397" 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="179" 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">
179
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<pre style="margin: 0;">+<span id="LC179" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">occurAnalysePgm.</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="397" 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">
397
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<td class="diff-line-num new_line" data-linenumber="180" 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">
180
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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="398" 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">
398
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<td class="diff-line-num new_line old" data-linenumber="181" 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="LC398" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                                    Inline  postInlineUnconditionally</span></span>
</pre>
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399
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<td class="diff-line-num new_line old" data-linenumber="181" 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="LC399" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   strong   IAmLoopBreaker False    no      no</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC400" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   weak     IAmLoopBreaker True     yes     no</span></span>
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<pre style="margin: 0;">-<span id="LC401" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            other                   yes     yes</span></span>
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<pre style="margin: 0;">+<span id="LC181" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Main Invariant:</span></span>
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<pre style="margin: 0;"> <span id="LC182" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC403" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    The **sole** reason for this kind of loop breaker is so that</span></span>
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<pre style="margin: 0;">-<span id="LC404" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    postInlineUnconditionally does not fire.  Ugh.  (Typically it'll</span></span>
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<pre style="margin: 0;">-<span id="LC405" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    inline via the usual callSiteInline stuff, so it'll be dead in the</span></span>
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<pre style="margin: 0;">-<span id="LC406" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    next pass, so the main Ugh is the tiresome complication.)</span></span>
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<pre style="margin: 0;">+<span id="LC183" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Throughout, we treat an IMP-RULE that mentions 'f' on its LHS</span></span>
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<pre style="margin: 0;">+<span id="LC184" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  just like a RULE for f.</span></span>
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<pre style="margin: 0;"> <span id="LC185" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC408" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [<span class="idiff left right">Rules for imported function</span>s]</span></span>
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<pre style="margin: 0;">+<span id="LC186" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [<span class="idiff left right">IMP-RULES: unavoidable loop</span>s]</span></span>
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<pre style="margin: 0;"> <span id="LC187" 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="LC188" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider this</span></span>
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<pre style="margin: 0;"> <span id="LC189" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   f = /\a. B.g a</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="206" 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">@@ -428,14 +206,28 @@ B.g.  We could only spot such loops by exhaustively following</td>
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<pre style="margin: 0;"> <span id="LC206" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">unfoldings of C.h etc, in case we reach B.g, and hence (via the RULE)</span></span>
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<pre style="margin: 0;"> <span id="LC207" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">f.</span></span>
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<pre style="margin: 0;"> <span id="LC208" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC431" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that RULES for imported functions are important in practice; they</span></span>
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432
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<pre style="margin: 0;">-<span id="LC432" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">occur a lot in the libraries.</span></span>
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<pre style="margin: 0;">-<span id="LC433" class="line" lang="haskell"></span>
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434
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<pre style="margin: 0;"> <span id="LC209" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We regard this potential infinite loop as a *programmer* error.</span></span>
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<pre style="margin: 0;"> <span id="LC210" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">It's up the programmer not to write silly rules like</span></span>
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<pre style="margin: 0;"> <span id="LC211" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     RULE f x = f x</span></span>
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<pre style="margin: 0;"> <span id="LC212" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and the example above is just a more complicated version.</span></span>
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<pre style="margin: 0;"> <span id="LC213" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC214" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Specialising imported functions] (referred to from Specialise)</span></span>
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<pre style="margin: 0;">+<span id="LC215" 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="LC216" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">For *automatically-generated* rules, the programmer can't be</span></span>
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<pre style="margin: 0;">+<span id="LC217" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">responsible for the "programmer error" in Note [IMP-RULES: unavoidable</span></span>
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<pre style="margin: 0;">+<span id="LC218" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">loops].  In particular, consider specialising a recursive function</span></span>
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<pre style="margin: 0;">+<span id="LC219" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">defined in another module.  If we specialise a recursive function B.g,</span></span>
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<pre style="margin: 0;">+<span id="LC220" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we get</span></span>
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<pre style="margin: 0;">+<span id="LC221" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  g_spec = .....(B.g Int).....</span></span>
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<pre style="margin: 0;">+<span id="LC222" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  RULE B.g Int = g_spec</span></span>
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<pre style="margin: 0;">+<span id="LC223" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Here, g_spec doesn't look recursive, but when the rule fires, it</span></span>
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<pre style="margin: 0;">+<span id="LC224" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">becomes so.  And if B.g was mutually recursive, the loop might not be</span></span>
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<pre style="margin: 0;">+<span id="LC225" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">as obvious as it is here.</span></span>
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<pre style="margin: 0;">+<span id="LC226" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC227" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">To avoid this,</span></span>
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<pre style="margin: 0;">+<span id="LC228" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * When specialising a function that is a loop breaker,</span></span>
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<pre style="margin: 0;">+<span id="LC229" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   give a NOINLINE pragma to the specialised function</span></span>
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<pre style="margin: 0;">+<span id="LC230" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC231" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Preventing loops due to imported functions rules]</span></span>
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<pre style="margin: 0;"> <span id="LC232" 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="LC233" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider:</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">@@ -501,70 +293,207 @@ And we are in an infinite loop again, except that this time the loop is producin</td>
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<pre style="margin: 0;"> <span id="LC293" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">infinitely large *term* (an unrolling of filter) and so the simplifier finally</span></span>
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<pre style="margin: 0;"> <span id="LC294" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">dies with "ticks exhausted"</span></span>
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<pre style="margin: 0;"> <span id="LC295" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC504" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Because of this problem, we make a small change in the occurrence analyser</span></span>
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<pre style="margin: 0;">-<span id="LC505" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">designed to mark functions like "filter" as strong loop breakers on the basis that:</span></span>
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<pre style="margin: 0;">-<span id="LC506" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  1. The RHS of filter mentions the local function "filterFB"</span></span>
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<pre style="margin: 0;">-<span id="LC507" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  2. We have a rule which mentions "filterFB" on the LHS and "filter" on the RHS</span></span>
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<pre style="margin: 0;">+<span id="LC296" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">SOLUTION: we treat the rule "filterList" as an extra rule for 'filterFB'</span></span>
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<pre style="margin: 0;">+<span id="LC297" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">because it mentions 'filterFB' on the LHS.  This is the Main Invariant</span></span>
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<pre style="margin: 0;">+<span id="LC298" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in Note [IMP-RULES: local rules for imported functions].</span></span>
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<pre style="margin: 0;">+<span id="LC299" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC300" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So, during loop-breaker analysis:</span></span>
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<pre style="margin: 0;">+<span id="LC301" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC302" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">- for each active RULE for a local function 'f' we add an edge bewteen</span></span>
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<pre style="margin: 0;">+<span id="LC303" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  'f' and the local FVs of the rule RHS</span></span>
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<pre style="margin: 0;">+<span id="LC304" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC305" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">- for each active RULE for an *imported* function we add dependency</span></span>
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<pre style="margin: 0;">+<span id="LC306" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  edges between the *local* FVS of the rule LHS and the *local* FVS of</span></span>
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<pre style="margin: 0;">+<span id="LC307" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  the rule RHS.</span></span>
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<pre style="margin: 0;">+<span id="LC308" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC309" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Even with this extra hack we aren't always going to get things</span></span>
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<pre style="margin: 0;">+<span id="LC310" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">right. For example, it might be that the rule LHS mentions an imported</span></span>
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<pre style="margin: 0;">+<span id="LC311" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Id, and another module has a RULE that can rewrite that imported Id to</span></span>
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<pre style="margin: 0;">+<span id="LC312" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">one of our local Ids.</span></span>
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<pre style="margin: 0;">+<span id="LC313" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">+<span id="LC314" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Plugin rules]</span></span>
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<pre style="margin: 0;">+<span id="LC315" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC316" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Conal Elliott (#11651) built a GHC plugin that added some</span></span>
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<pre style="margin: 0;">+<span id="LC317" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">BuiltinRules (for imported Ids) to the mg_rules field of ModGuts, to</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC318" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">do some domain-specific transformations that could not be expressed</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC319" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">with an ordinary pattern-matching CoreRule.  But then we can't extract</span></span>
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<pre style="margin: 0;">+<span id="LC320" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the dependencies (in imp_rule_edges) from ru_rhs etc, because a</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC321" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">BuiltinRule doesn't have any of that stuff.</span></span>
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<pre style="margin: 0;">+<span id="LC322" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">+<span id="LC323" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So we simply assume that BuiltinRules have no dependencies, and filter</span></span>
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<pre style="margin: 0;">+<span id="LC324" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">them out from the imp_rule_edges comprehension.</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC325" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">+<span id="LC326" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Glomming]</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC327" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC328" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">RULES for imported Ids can make something at the top refer to</span></span>
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<pre style="margin: 0;">+<span id="LC329" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">something at the bottom:</span></span>
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<pre style="margin: 0;">+<span id="LC330" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC331" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        foo = ...(B.f @Int)...</span></span>
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<pre style="margin: 0;">+<span id="LC332" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        $sf = blah</span></span>
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<pre style="margin: 0;">+<span id="LC333" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        RULE:  B.f @Int = $sf</span></span>
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<pre style="margin: 0;">+<span id="LC334" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC335" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Applying this rule makes foo refer to $sf, although foo doesn't appear to</span></span>
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<pre style="margin: 0;">+<span id="LC336" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">depend on $sf.  (And, as in Note [Rules for imported functions], the</span></span>
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<pre style="margin: 0;">+<span id="LC337" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">dependency might be more indirect. For example, foo might mention C.t</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC338" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">rather than B.f, where C.t eventually inlines to B.f.)</span></span>
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<pre style="margin: 0;">+<span id="LC339" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC340" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">NOTICE that this cannot happen for rules whose head is a</span></span>
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<pre style="margin: 0;">+<span id="LC341" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">locally-defined function, because we accurately track dependencies</span></span>
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<pre style="margin: 0;">+<span id="LC342" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">through RULES.  It only happens for rules whose head is an imported</span></span>
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<pre style="margin: 0;">+<span id="LC343" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">function (B.f in the example above).</span></span>
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<pre style="margin: 0;">+<span id="LC344" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC345" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Solution:</span></span>
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<pre style="margin: 0;">+<span id="LC346" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - When simplifying, bring all top level identifiers into</span></span>
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<pre style="margin: 0;">+<span id="LC347" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    scope at the start, ignoring the Rec/NonRec structure, so</span></span>
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<pre style="margin: 0;">+<span id="LC348" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    that when 'h' pops up in f's rhs, we find it in the in-scope set</span></span>
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<pre style="margin: 0;">+<span id="LC349" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (as the simplifier generally expects). This happens in simplTopBinds.</span></span>
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<pre style="margin: 0;">+<span id="LC350" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC351" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - In the occurrence analyser, if there are any out-of-scope</span></span>
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<pre style="margin: 0;">+<span id="LC352" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    occurrences that pop out of the top, which will happen after</span></span>
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<pre style="margin: 0;">+<span id="LC353" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    firing the rule:      f = \x -> h x</span></span>
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<pre style="margin: 0;">+<span id="LC354" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                          h = \y -> 3</span></span>
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<pre style="margin: 0;">+<span id="LC355" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    then just glom all the bindings into a single Rec, so that</span></span>
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<pre style="margin: 0;">+<span id="LC356" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    the *next* iteration of the occurrence analyser will sort</span></span>
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<pre style="margin: 0;">+<span id="LC357" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    them all out.   This part happens in occurAnalysePgm.</span></span>
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<pre style="margin: 0;">+<span id="LC358" 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="LC359" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC360" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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361
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<pre style="margin: 0;">+<span id="LC361" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
</pre>
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362
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<pre style="margin: 0;">+<span id="LC362" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>
</pre>
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363
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<pre style="margin: 0;">+<span id="LC363" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                Bindings</span></span>
</pre>
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364
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<pre style="margin: 0;">+<span id="LC364" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="365" 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">
365
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<pre style="margin: 0;">+<span id="LC365" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
</pre>
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366
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<pre style="margin: 0;">+<span id="LC366" class="line" lang="haskell"></span>
</pre>
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367
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<pre style="margin: 0;">+<span id="LC367" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Recursive bindings: the grand plan]</span></span>
</pre>
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368
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<pre style="margin: 0;">+<span id="LC368" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="369" 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">
369
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<pre style="margin: 0;">+<span id="LC369" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When we come across a binding group</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="370" 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">
370
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<pre style="margin: 0;">+<span id="LC370" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  Rec { x1 = r1; ...; xn = rn }</span></span>
</pre>
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371
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<pre style="margin: 0;">+<span id="LC371" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we treat it like this (occAnalRecBind):</span></span>
</pre>
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372
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<pre style="margin: 0;">+<span id="LC372" class="line" lang="haskell"></span>
</pre>
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373
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<pre style="margin: 0;">+<span id="LC373" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1. Note [Forming Rec groups]</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="374" 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">
374
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<pre style="margin: 0;">+<span id="LC374" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Occurrence-analyse each right hand side, and build a</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="375" 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">
375
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<pre style="margin: 0;">+<span id="LC375" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   "Details" for each binding to capture the results.</span></span>
</pre>
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376
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<pre style="margin: 0;">+<span id="LC376" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Wrap the details in a LetrecNode, ready for SCC analysis.</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="377" 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">
377
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<pre style="margin: 0;">+<span id="LC377" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   All this is done by makeNode.</span></span>
</pre>
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378
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<pre style="margin: 0;">+<span id="LC378" class="line" lang="haskell"></span>
</pre>
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379
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<pre style="margin: 0;">+<span id="LC379" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. Do SCC-analysis on these Nodes:</span></span>
</pre>
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380
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<pre style="margin: 0;">+<span id="LC380" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   - Each CyclicSCC will become a new Rec</span></span>
</pre>
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381
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<pre style="margin: 0;">+<span id="LC381" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   - Each AcyclicSCC will become a new NonRec</span></span>
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382
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<pre style="margin: 0;">+<span id="LC382" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   The key property is that every free variable of a binding is</span></span>
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383
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<pre style="margin: 0;">+<span id="LC383" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   accounted for by the scope edges, so that when we are done</span></span>
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384
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<pre style="margin: 0;">+<span id="LC384" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   everything is still in scope.</span></span>
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385
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<pre style="margin: 0;">+<span id="LC385" class="line" lang="haskell"></span>
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386
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<pre style="margin: 0;">+<span id="LC386" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">3. For each AcyclicSCC, just make a NonRec binding.</span></span>
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387
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<pre style="margin: 0;">+<span id="LC387" class="line" lang="haskell"></span>
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388
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<pre style="margin: 0;">+<span id="LC388" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">4. For each CyclicSCC of the scope-edge SCC-analysis in (2), we</span></span>
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389
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<pre style="margin: 0;">+<span id="LC389" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   identify suitable loop-breakers to ensure that inlining terminates.</span></span>
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390
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<pre style="margin: 0;">+<span id="LC390" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   This is done by occAnalRec.</span></span>
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391
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<pre style="margin: 0;">+<span id="LC391" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC392" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   4a To do so we form a new set of Nodes, with the same details, but</span></span>
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<pre style="margin: 0;">+<span id="LC393" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      different edges, the "loop-breaker nodes". The loop-breaker nodes</span></span>
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394
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<pre style="margin: 0;">+<span id="LC394" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      have both more and fewer dependencies than the scope edges</span></span>
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395
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<pre style="margin: 0;">+<span id="LC395" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      (see Note [Choosing loop breakers])</span></span>
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396
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<pre style="margin: 0;">+<span id="LC396" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC397" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      More edges: if f calls g, and g has an active rule that mentions h</span></span>
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398
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<pre style="margin: 0;">+<span id="LC398" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                 then we add an edge from f -> h</span></span>
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<pre style="margin: 0;">+<span id="LC399" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC400" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      Fewer edges: we only include dependencies on active rules, on rule</span></span>
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<pre style="margin: 0;">+<span id="LC401" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                   RHSs (not LHSs) and if there is an INLINE pragma only</span></span>
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<pre style="margin: 0;">+<span id="LC402" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                   on the stable unfolding (and vice versa).  The scope</span></span>
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<pre style="margin: 0;">+<span id="LC403" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                   edges must be much more inclusive.</span></span>
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<pre style="margin: 0;">+<span id="LC404" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC405" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   4b. The "weak fvs" of a node are, by definition:</span></span>
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<pre style="margin: 0;">+<span id="LC406" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       the scope fvs - the loop-breaker fvs</span></span>
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<pre style="margin: 0;">+<span id="LC407" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       See Note [Weak loop breakers], and the nd_weak field of Details</span></span>
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<pre style="margin: 0;">+<span id="LC408" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC409" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Dead code]</span></span>
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<pre style="margin: 0;">+<span id="LC410" 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="LC411" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Dropping dead code for a cyclic Strongly Connected Component is done</span></span>
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<pre style="margin: 0;">+<span id="LC412" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in a very simple way:</span></span>
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<pre style="margin: 0;">+<span id="LC413" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">+<span id="LC414" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        the entire SCC is dropped if none of its binders are mentioned</span></span>
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<pre style="margin: 0;">+<span id="LC415" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        in the body; otherwise the whole thing is kept.</span></span>
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<pre style="margin: 0;"> <span id="LC416" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">-<span id="LC509" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So for each RULE for an *imported* function we are going to add</span></span>
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<pre style="margin: 0;">-<span id="LC510" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">dependency edges between the *local* FVS of the rule LHS and the</span></span>
</pre>
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<pre style="margin: 0;">-<span id="LC511" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*local* FVS of the rule RHS. We don't do anything special for RULES on</span></span>
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<pre style="margin: 0;">-<span id="LC512" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">local functions because the standard occurrence analysis stuff is</span></span>
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513
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<pre style="margin: 0;">-<span id="LC513" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">pretty good at getting loop-breakerness correct there.</span></span>
</pre>
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417
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<pre style="margin: 0;">+<span id="LC417" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The key observation is that dead code elimination happens after</span></span>
</pre>
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418
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<pre style="margin: 0;">+<span id="LC418" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">dependency analysis: so 'occAnalBind' processes SCCs instead of the</span></span>
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419
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<pre style="margin: 0;">+<span id="LC419" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">original term's binding groups.</span></span>
</pre>
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514
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420
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<pre style="margin: 0;"> <span id="LC420" class="line" lang="haskell"></span>
</pre>
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515
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<pre style="margin: 0;">-<span id="LC515" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">It is important to note that even with this extra hack we aren't always going to get</span></span>
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516
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<pre style="margin: 0;">-<span id="LC516" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">things right. For example, it might be that the rule LHS mentions an imported Id,</span></span>
</pre>
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517
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<pre style="margin: 0;">-<span id="LC517" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and another module has a RULE that can rewrite that imported Id to one of our local</span></span>
</pre>
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518
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<pre style="margin: 0;">-<span id="LC518" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Ids.</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC421" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Thus 'occAnalBind' does indeed drop 'f' in an example like</span></span>
</pre>
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519
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422
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<pre style="margin: 0;"> <span id="LC422" class="line" lang="haskell"></span>
</pre>
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520
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<pre style="margin: 0;">-<span id="LC520" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Specialising imported functions] (referred to from Specialise)</span></span>
</pre>
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521
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<pre style="margin: 0;">-<span id="LC521" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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522
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<td class="diff-line-num new_line old" data-linenumber="423" 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="LC522" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">BUT for *automatically-generated* rules, the programmer can't be</span></span>
</pre>
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523
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<td class="diff-line-num new_line old" data-linenumber="423" 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="LC523" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">responsible for the "programmer error" in Note [Rules for imported</span></span>
</pre>
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524
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<pre style="margin: 0;">-<span id="LC524" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">functions].  In particular, consider specialising a recursive function</span></span>
</pre>
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525
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<pre style="margin: 0;">-<span id="LC525" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">defined in another module.  If we specialise a recursive function B.g,</span></span>
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526
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<pre style="margin: 0;">-<span id="LC526" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we get</span></span>
</pre>
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527
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<pre style="margin: 0;">-<span id="LC527" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         g_spec = .....(B.g Int).....</span></span>
</pre>
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528
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<pre style="margin: 0;">-<span id="LC528" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         RULE B.g Int = g_spec</span></span>
</pre>
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529
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<pre style="margin: 0;">-<span id="LC529" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Here, g_spec doesn't look recursive, but when the rule fires, it</span></span>
</pre>
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530
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<td class="diff-line-num new_line old" data-linenumber="423" 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="LC530" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">becomes so.  And if B.g was mutually recursive, the loop might</span></span>
</pre>
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531
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<td class="diff-line-num new_line old" data-linenumber="423" 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="LC531" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">not be as obvious as it is here.</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="532" 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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423
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<pre style="margin: 0;">+<span id="LC423" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        letrec f = ...g...</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="532" 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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424
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<pre style="margin: 0;">+<span id="LC424" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">               g = ...(...g...)...</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="425" 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">
425
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<pre style="margin: 0;">+<span id="LC425" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        in</span></span>
</pre>
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426
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<pre style="margin: 0;">+<span id="LC426" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">           ...g...</span></span>
</pre>
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532
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427
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<pre style="margin: 0;"> <span id="LC427" class="line" lang="haskell"></span>
</pre>
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533
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<td class="diff-line-num new_line old" data-linenumber="428" 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="LC533" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">To avoid this,</span></span></span>
</pre>
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534
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<td class="diff-line-num new_line old" data-linenumber="428" 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="LC534" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right"> * When specialising a function that is a loop breaker,</span></span></span>
</pre>
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535
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<td class="diff-line-num new_line old" data-linenumber="428" 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="LC535" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">   give a NOINLINE pragma to the specialised function</span></span></span>
</pre>
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428
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<pre style="margin: 0;">+<span id="LC428" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">when 'g' no longer uses 'f' at all (eg 'f' does not occur in a RULE in</span></span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="429" 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">
429
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<pre style="margin: 0;">+<span id="LC429" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">'g'). 'occAnalBind' first consumes 'CyclicSCC g' and then it consumes</span></span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="536" 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="430" 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">
430
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<pre style="margin: 0;">+<span id="LC430" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">'AcyclicSCC f', where 'body_usage' won't contain 'f'.</span></span></span>
</pre>
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536
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<td class="diff-line-num new_line" data-linenumber="431" 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">
431
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<pre style="margin: 0;"> <span id="LC431" class="line" lang="haskell"></span>
</pre>
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537
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<td class="diff-line-num new_line old" data-linenumber="432" 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="LC537" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Glomming]</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="538" 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">
538
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<td class="diff-line-num new_line old" data-linenumber="432" 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="LC538" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="539" 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">
539
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<td class="diff-line-num new_line old" data-linenumber="432" 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="LC539" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">RULES for imported Ids can make something at the top refer to something at the bottom:</span></span>
</pre>
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540
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<td class="diff-line-num new_line old" data-linenumber="432" 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="LC540" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        f = \x -> B.g (q x)</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="541" 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">
541
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<td class="diff-line-num new_line old" data-linenumber="432" 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="LC541" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        h = \y -> 3</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC432" 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="LC433" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Forming Rec groups]</span></span>
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<pre style="margin: 0;">+<span id="LC434" 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="LC435" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The key point about the "Forming Rec groups" step is that it /preserves</span></span>
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<pre style="margin: 0;">+<span id="LC436" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">scoping/.  If 'x' is mentioned, it had better be bound somewhere.  So if</span></span>
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<pre style="margin: 0;">+<span id="LC437" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we start with</span></span>
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<pre style="margin: 0;">+<span id="LC438" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  Rec { f = ...h...</span></span>
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<pre style="margin: 0;">+<span id="LC439" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      ; g = ...f...</span></span>
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<pre style="margin: 0;">+<span id="LC440" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      ; h = ...f... }</span></span>
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<pre style="margin: 0;">+<span id="LC441" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we can split into SCCs</span></span>
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<pre style="margin: 0;">+<span id="LC442" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  Rec { f = ...h...</span></span>
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<pre style="margin: 0;">+<span id="LC443" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      ; h = ..f... }</span></span>
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<pre style="margin: 0;">+<span id="LC444" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  NonRec { g = ...f... }</span></span>
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<pre style="margin: 0;">+<span id="LC445" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC446" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We put bindings {f = ef; g = eg } in a Rec group if "f uses g" and "g</span></span>
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<pre style="margin: 0;">+<span id="LC447" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">uses f", no matter how indirectly.  We do a SCC analysis with an edge</span></span>
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<pre style="margin: 0;">+<span id="LC448" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">f -> g if "f mentions g". That is, g is free in:</span></span>
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<pre style="margin: 0;">+<span id="LC449" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  a) the rhs 'ef'</span></span>
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<pre style="margin: 0;">+<span id="LC450" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  b) or the RHS of a rule for f, whether active or inactive</span></span>
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<pre style="margin: 0;">+<span id="LC451" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       Note [Rules are extra RHSs]</span></span>
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<pre style="margin: 0;">+<span id="LC452" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  c) or the LHS or a rule for f, whether active or inactive</span></span>
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<pre style="margin: 0;">+<span id="LC453" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       Note [Rule dependency info]</span></span>
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<pre style="margin: 0;">+<span id="LC454" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  d) the RHS of an /active/ local IMP-RULE</span></span>
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<pre style="margin: 0;">+<span id="LC455" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       Note [IMP-RULES: local rules for imported functions]</span></span>
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<pre style="margin: 0;">+<span id="LC456" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC457" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(b) and (c) apply regardless of the activation of the RULE, because even if</span></span>
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<pre style="margin: 0;">+<span id="LC458" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the rule is inactive its free variables must be bound.  But (d) doesn't need</span></span>
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<pre style="margin: 0;">+<span id="LC459" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">to worry about this because IMP-RULES are always notionally at the bottom</span></span>
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<pre style="margin: 0;">+<span id="LC460" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of the file.</span></span>
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<pre style="margin: 0;"> <span id="LC461" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC543" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        RULE:  B.g (q x) = h x</span></span>
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<pre style="margin: 0;">+<span id="LC462" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Note [Rules are extra RHSs]</span></span>
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<pre style="margin: 0;">+<span id="LC463" 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="LC464" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    A RULE for 'f' is like an extra RHS for 'f'. That way the "parent"</span></span>
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<pre style="margin: 0;">+<span id="LC465" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    keeps the specialised "children" alive.  If the parent dies</span></span>
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<pre style="margin: 0;">+<span id="LC466" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (because it isn't referenced any more), then the children will die</span></span>
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<pre style="margin: 0;">+<span id="LC467" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    too (unless they are already referenced directly).</span></span>
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<pre style="margin: 0;"> <span id="LC468" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC545" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Applying this rule makes f refer to h, although f doesn't appear to</span></span>
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<pre style="margin: 0;">-<span id="LC546" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">depend on h.  (And, as in Note [Rules for imported functions], the</span></span>
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<pre style="margin: 0;">-<span id="LC547" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">dependency might be more indirect. For example, f might mention C.t</span></span>
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<pre style="margin: 0;">-<span id="LC548" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">rather than B.g, where C.t eventually inlines to B.g.)</span></span>
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<pre style="margin: 0;">+<span id="LC469" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    So in Example [eftInt], eftInt and eftIntFB will be put in the</span></span>
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<pre style="margin: 0;">+<span id="LC470" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    same Rec, even though their 'main' RHSs are both non-recursive.</span></span>
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<pre style="margin: 0;"> <span id="LC471" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC550" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">NOTICE that this cannot happen for rules whose head is a</span></span>
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<pre style="margin: 0;">-<span id="LC551" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">locally-defined function, because we accurately track dependencies</span></span>
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<pre style="margin: 0;">-<span id="LC552" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">through RULES.  It only happens for rules whose head is an imported</span></span>
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<pre style="margin: 0;">-<span id="LC553" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">function (B.g in the example above).</span></span>
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<pre style="margin: 0;">+<span id="LC472" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    We must also include inactive rules, so that their free vars</span></span>
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<pre style="margin: 0;">+<span id="LC473" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    remain in scope.</span></span>
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<pre style="margin: 0;"> <span id="LC474" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC555" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Solution:</span></span>
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<pre style="margin: 0;">-<span id="LC556" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - When simplifying, bring all top level identifiers into</span></span>
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<pre style="margin: 0;">-<span id="LC557" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    scope at the start, ignoring the Rec/NonRec structure, so</span></span>
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<pre style="margin: 0;">-<span id="LC558" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    that when 'h' pops up in f's rhs, we find it in the in-scope set</span></span>
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<pre style="margin: 0;">-<span id="LC559" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (as the simplifier generally expects). This happens in simplTopBinds.</span></span>
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<pre style="margin: 0;">+<span id="LC475" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Note [Rule dependency info]</span></span>
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<pre style="margin: 0;">+<span id="LC476" 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="LC477" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    The VarSet in a RuleInfo is used for dependency analysis in the</span></span>
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<pre style="margin: 0;">+<span id="LC478" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    occurrence analyser.  We must track free vars in *both* lhs and rhs.</span></span>
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<pre style="margin: 0;">+<span id="LC479" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Hence use of idRuleVars, rather than idRuleRhsVars in occAnalBind.</span></span>
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<pre style="margin: 0;">+<span id="LC480" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Why both? Consider</span></span>
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<pre style="margin: 0;">+<span id="LC481" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        x = y</span></span>
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<pre style="margin: 0;">+<span id="LC482" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        RULE f x = v+4</span></span>
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<pre style="margin: 0;">+<span id="LC483" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Then if we substitute y for x, we'd better do so in the</span></span>
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<pre style="margin: 0;">+<span id="LC484" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    rule's LHS too, so we'd better ensure the RULE appears to mention 'x'</span></span>
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<pre style="margin: 0;">+<span id="LC485" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    as well as 'v'</span></span>
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<pre style="margin: 0;"> <span id="LC486" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC561" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - In the occurrence analyser, if there are any out-of-scope</span></span>
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<pre style="margin: 0;">-<span id="LC562" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    occurrences that pop out of the top, which will happen after</span></span>
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<pre style="margin: 0;">-<span id="LC563" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    firing the rule:      f = \x -> h x</span></span>
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<pre style="margin: 0;">-<span id="LC564" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                          h = \y -> 3</span></span>
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<pre style="margin: 0;">-<span id="LC565" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    then just glom all the bindings into a single Rec, so that</span></span>
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<pre style="margin: 0;">-<span id="LC566" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    the *next* iteration of the occurrence analyser will sort</span></span>
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<pre style="margin: 0;">-<span id="LC567" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    them all out.   This part happens in occurAnalysePgm.</span></span>
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<pre style="margin: 0;">+<span id="LC487" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Note [Rules are visible in their own rec group]</span></span>
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<pre style="margin: 0;">+<span id="LC488" 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="LC489" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    We want the rules for 'f' to be visible in f's right-hand side.</span></span>
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<pre style="margin: 0;">+<span id="LC490" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    And we'd like them to be visible in other functions in f's Rec</span></span>
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491
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<pre style="margin: 0;">+<span id="LC491" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    group.  E.g. in Note [Specialisation rules] we want f' rule</span></span>
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492
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<pre style="margin: 0;">+<span id="LC492" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    to be visible in both f's RHS, and fs's RHS.</span></span>
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493
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<pre style="margin: 0;">+<span id="LC493" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="568" 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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494
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<pre style="margin: 0;">+<span id="LC494" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    This means that we must simplify the RULEs first, before looking</span></span>
</pre>
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495
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<pre style="margin: 0;">+<span id="LC495" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    at any of the definitions.  This is done by Simplify.simplRecBind,</span></span>
</pre>
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496
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<pre style="margin: 0;">+<span id="LC496" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    when it calls addLetIdInfo.</span></span>
</pre>
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568
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497
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<pre style="margin: 0;"> <span id="LC497" class="line" lang="haskell"></span>
</pre>
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569
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498
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<pre style="margin: 0;"> <span id="LC498" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">------------------------------------------------------------</span></span>
</pre>
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570
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<td class="diff-line-num new_line" data-linenumber="499" 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">
499
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<pre style="margin: 0;"> <span id="LC499" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Inline rules]</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="724" 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="653" 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">@@ -724,6 +653,13 @@ propagate.</td>
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724
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653
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<pre style="margin: 0;"> <span id="LC653" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  This appears to be very rare in practice. TODO Perhaps we should gather</span></span>
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725
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<td class="diff-line-num new_line" data-linenumber="654" 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">
654
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<pre style="margin: 0;"> <span id="LC654" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  statistics to be sure.</span></span>
</pre>
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726
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655
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<pre style="margin: 0;"> <span id="LC655" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">+<span id="LC656" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Unfoldings and join points]</span></span>
</pre>
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657
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<pre style="margin: 0;">+<span id="LC657" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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658
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<pre style="margin: 0;">+<span id="LC658" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We assume that anything in an unfolding occurs multiple times, since</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="659" 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">
659
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<pre style="margin: 0;">+<span id="LC659" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">unfoldings are often copied (that's the whole point!). But we still</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="660" 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">
660
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC660" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">need to track tail calls for the purpose of finding join points.</span></span>
</pre>
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661
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<pre style="margin: 0;">+<span id="LC661" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">+<span id="LC662" class="line" lang="haskell"></span>
</pre>
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727
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663
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<pre style="margin: 0;"> <span id="LC663" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">------------------------------------------------------------</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="728" 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">
728
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<td class="diff-line-num new_line" data-linenumber="664" 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">
664
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<pre style="margin: 0;"> <span id="LC664" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Adjusting right-hand sides]</span></span>
</pre>
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729
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<td class="diff-line-num new_line" data-linenumber="665" 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">
665
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<pre style="margin: 0;"> <span id="LC665" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="794" 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="730" 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">@@ -794,45 +730,50 @@ occAnalNonRecBind env lvl imp_rule_edges bndr rhs body_usage</td>
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794
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<td class="diff-line-num new_line" data-linenumber="730" 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">
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<pre style="margin: 0;"> <span id="LC730" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="795" 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">
795
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<td class="diff-line-num new_line" data-linenumber="731" 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">
731
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<pre style="margin: 0;"> <span id="LC731" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="796" 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">
796
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<td class="diff-line-num new_line" data-linenumber="732" 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">
732
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<pre style="margin: 0;"> <span id="LC732" 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>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="797" 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">
797
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<td class="diff-line-num new_line old" data-linenumber="733" 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="LC797" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">body_usage'</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">rhs_usage<span class="idiff left right">4</span></span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">final_bndr</span> <span class="n" style="color: #333;">rhs'</span><span class="p">])</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="798" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="733" 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">
733
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<pre style="margin: 0;">+<span id="LC733" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">body_usage'</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">rhs_usage</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">final_bndr</span> <span class="n" style="color: #333;">rhs'</span><span class="p">])</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="798" 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">
798
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<td class="diff-line-num new_line" data-linenumber="734" 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">
734
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<pre style="margin: 0;"> <span id="LC734" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="799" 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">
799
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<td class="diff-line-num new_line" data-linenumber="735" 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">
735
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<pre style="margin: 0;"> <span id="LC735" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">body_usage'</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_usage</span> <span class="n" style="color: #333;">bndr</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="800" 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">
800
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<td class="diff-line-num new_line old" data-linenumber="736" 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="LC800" class="line" lang="haskell">    <span class="n" style="color: #333;">occ</span>                        <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idOccInfo</span> <span class="n" style="color: #333;">tagged_bndr</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="801" 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="736" 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">
736
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<pre style="margin: 0;">+<span id="LC736" 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;">tagged_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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="801" 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="737" 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">
737
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<pre style="margin: 0;">+<span id="LC737" class="line" lang="haskell">                             <span class="p">`</span><span class="n" style="color: #333;">setIdSpecialisation</span><span class="p">`</span> <span class="n" style="color: #333;">mkRuleInfo</span> <span class="n" style="color: #333;">rules'</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="801" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="738" 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">
738
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<pre style="margin: 0;">+<span id="LC738" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs_usage</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;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">unf_uds</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">rule_uds</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="801" 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">
801
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<td class="diff-line-num new_line" data-linenumber="739" 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">
739
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<pre style="margin: 0;"> <span id="LC739" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="802" 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">
802
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<td class="diff-line-num new_line" data-linenumber="740" 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">
740
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<pre style="margin: 0;"> <span id="LC740" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Get the join info from the *new* decision</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="803" 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">
803
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<td class="diff-line-num new_line" data-linenumber="741" 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">
741
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<pre style="margin: 0;"> <span id="LC741" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Join points and unfoldings/rules]</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="804" 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">
804
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<td class="diff-line-num new_line" data-linenumber="742" 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">
742
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<pre style="margin: 0;"> <span id="LC742" class="line" lang="haskell">    <span class="n" style="color: #333;">mb_join_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">willBeJoinId_maybe</span> <span class="n" style="color: #333;">tagged_bndr</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="805" 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">
805
</td>
<td class="diff-line-num new_line" data-linenumber="743" 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">
743
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<pre style="margin: 0;"> <span id="LC743" class="line" lang="haskell">    <span class="n" style="color: #333;">is_join_point</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isJust</span> <span class="n" style="color: #333;">mb_join_arity</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="806" 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">
806
</td>
<td class="diff-line-num new_line" data-linenumber="744" 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">
744
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC744" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="807" 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">
807
</td>
<td class="diff-line-num new_line old" data-linenumber="745" 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="LC807" 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;">tagged_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>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="808" 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">
808
</td>
<td class="diff-line-num new_line old" data-linenumber="745" 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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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC808" class="line" lang="haskell">                             <span class="p">`</span><span class="n" style="color: #333;">setIdSpecialisation</span><span class="p">`</span> <span class="n" style="color: #333;">mkRuleInfo</span> <span class="n" style="color: #333;">rules'</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="809" 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">
809
</td>
<td class="diff-line-num new_line old" data-linenumber="745" 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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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC809" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="810" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="745" 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">
745
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<pre style="margin: 0;">+<span id="LC745" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--------- Right hand side ---------</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="810" 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">
810
</td>
<td class="diff-line-num new_line" data-linenumber="746" 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">
746
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<pre style="margin: 0;"> <span id="LC746" class="line" lang="haskell">    <span class="n" style="color: #333;">env1</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">is_join_point</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</span>  <span class="c1" style="color: #998; font-style: italic;">-- See Note [Join point RHSs]</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="811" 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">
811
</td>
<td class="diff-line-num new_line" data-linenumber="747" 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">
747
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<pre style="margin: 0;"> <span id="LC747" class="line" lang="haskell">         <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">certainly_inline</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env</span>  <span class="c1" style="color: #998; font-style: italic;">-- See Note [Cascading inlines]</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="812" 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">
812
</td>
<td class="diff-line-num new_line" data-linenumber="748" 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">
748
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<pre style="margin: 0;"> <span id="LC748" 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;">rhsCtxt</span> <span class="n" style="color: #333;">env</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="813" 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">
813
</td>
<td class="diff-line-num new_line" data-linenumber="749" 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">
749
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC749" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
<tr class="line_holder" id="" style="line-height: 1.6;">
<td class="diff-line-num old_line" data-linenumber="814" 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">
814
</td>
<td class="diff-line-num new_line" data-linenumber="750" 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">
750
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC750" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Sources of one-shot information]</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="815" 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">
815
</td>
<td class="diff-line-num new_line" data-linenumber="751" 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">
751
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<pre style="margin: 0;"> <span id="LC751" 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;">env1</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;">argOneShots</span> <span class="n" style="color: #333;">dmd</span> <span class="p">}</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="816" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="752" 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">
752
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<pre style="margin: 0;">+<span id="LC752" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">rhs_uds</span><span class="p">,</span> <span class="n" style="color: #333;">rhs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalRhs</span> <span class="n" style="color: #333;">rhs_env</span> <span class="kt" style="color: #458; font-weight: 600;">NonRecursive</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">rhs</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="816" 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">
816
</td>
<td class="diff-line-num new_line" data-linenumber="753" 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">
753
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC753" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="817" 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">
817
</td>
<td class="diff-line-num new_line old" data-linenumber="754" 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="LC817" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">rhs_usage1</span><span class="p">,</span> <span class="n" style="color: #333;">rhs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalRhs</span> <span class="n" style="color: #333;">rhs_env</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">rhs</span></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="818" 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">
818
</td>
<td class="diff-line-num new_line old" data-linenumber="754" 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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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC818" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="819" 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">
819
</td>
<td class="diff-line-num new_line old" data-linenumber="754" 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="LC819" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Unfoldings</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="820" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="754" 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">
754
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<pre style="margin: 0;">+<span id="LC754" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--------- Unfolding ---------</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="820" 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">
820
</td>
<td class="diff-line-num new_line" data-linenumber="755" 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">
755
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<pre style="margin: 0;"> <span id="LC755" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Unfoldings and join points]</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="821" 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">
821
</td>
<td class="diff-line-num new_line" data-linenumber="756" 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">
756
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<pre style="margin: 0;"> <span id="LC756" 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;">idUnfolding</span> <span class="n" style="color: #333;">bndr</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="822" 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">
822
</td>
<td class="diff-line-num new_line old" data-linenumber="757" 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="LC822" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">unf_usage</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="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">unf</span></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="823" 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">
823
</td>
<td class="diff-line-num new_line old" data-linenumber="757" 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="LC823" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs_usage2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs_usage1</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">unf_usage</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="824" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="757" 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">
757
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<pre style="margin: 0;">+<span id="LC757" 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;">NonRecursive</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">unf</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="824" 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">
824
</td>
<td class="diff-line-num new_line" data-linenumber="758" 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">
758
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC758" class="line" lang="haskell"></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="825" 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">
825
</td>
<td class="diff-line-num new_line old" data-linenumber="759" 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="LC825" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--<span class="idiff left right"> Rules</span></span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="826" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="759" 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">
759
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC759" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--<span class="idiff left right">------- Rules ---------</span></span></span>
</pre>
</td>
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<tr class="line_holder" id="" style="line-height: 1.6;">
<td class="diff-line-num old_line" data-linenumber="826" 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">
826
</td>
<td class="diff-line-num new_line" data-linenumber="760" 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">
760
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<pre style="margin: 0;"> <span id="LC760" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Rules are extra RHSs] and Note [Rule dependency info]</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="827" 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">
827
</td>
<td class="diff-line-num new_line old" data-linenumber="761" 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="LC827" class="line" lang="haskell">    <span class="n" style="color: #333;">rules_w_uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalRules</span> <span class="n" style="color: #333;">rhs_env</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">bndr</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="828" 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">
828
</td>
<td class="diff-line-num new_line old" data-linenumber="761" 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="LC828" class="line" lang="haskell">    <span class="n" style="color: #333;">rule_uds</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">l</span><span class="p">,</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">l</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="n" style="color: #333;">rules_w_uds</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="829" 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">
829
</td>
<td class="diff-line-num new_line old" data-linenumber="761" 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="LC829" class="line" lang="haskell">    <span class="n" style="color: #333;">rules'</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">fstOf3</span> <span class="n" style="color: #333;">rules_w_uds</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="830" 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">
830
</td>
<td class="diff-line-num new_line old" data-linenumber="761" 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="LC830" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs_usage3</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">andUDs</span> <span class="n" style="color: #333;">rhs_usage2</span> <span class="n" style="color: #333;">rule_uds</span></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="831" 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">
831
</td>
<td class="diff-line-num new_line old" data-linenumber="761" 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="LC831" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs_usage4</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">lookupVarEnv</span> <span class="n" style="color: #333;">imp_rule_edges</span> <span class="n" style="color: #333;">bndr</span> <span class="kr" style="font-weight: 600;">of</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="832" 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">
832
</td>
<td class="diff-line-num new_line old" data-linenumber="761" 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="LC832" 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;">rhs_usage3</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="833" 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">
833
</td>
<td class="diff-line-num new_line old" data-linenumber="761" 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="LC833" 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;">rhs_usage3</span> <span class="n" style="color: #333;">vs</span></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="834" 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">
834
</td>
<td class="diff-line-num new_line old" data-linenumber="761" 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="LC834" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- See Note [Preventing loops due to imported functions rules]</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="835" 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">
835
</td>
<td class="diff-line-num new_line old" data-linenumber="761" 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="LC835" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="761" 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">
761
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<pre style="margin: 0;">+<span id="LC761" class="line" lang="haskell">    <span class="n" style="color: #333;">rules_w_uds</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalRules</span> <span class="n" style="color: #333;">rhs_env</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">bndr</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="762" 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">
762
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<pre style="margin: 0;">+<span id="LC762" class="line" lang="haskell">    <span class="n" style="color: #333;">rules'</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">fstOf3</span> <span class="n" style="color: #333;">rules_w_uds</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="763" 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">
763
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<pre style="margin: 0;">+<span id="LC763" class="line" lang="haskell">    <span class="n" style="color: #333;">imp_rule_uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">impRulesScopeUsage</span> <span class="p">(</span><span class="n" style="color: #333;">lookupImpRules</span> <span class="n" style="color: #333;">imp_rule_edges</span> <span class="n" style="color: #333;">bndr</span><span class="p">)</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="764" 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">
764
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<pre style="margin: 0;">+<span id="LC764" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- imp_rule_uds: consider</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="765" 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">
765
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<pre style="margin: 0;">+<span id="LC765" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">--     h = ...</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="766" 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">
766
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<pre style="margin: 0;">+<span id="LC766" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">--     g = ...</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="767" 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">
767
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<pre style="margin: 0;">+<span id="LC767" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">--     RULE map g = h</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="768" 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">
768
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<pre style="margin: 0;">+<span id="LC768" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- Then we want to ensure that h is in scope everwhere</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="769" 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">
769
</td>
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<pre style="margin: 0;">+<span id="LC769" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- that g is (since the RULE might turn g into h), so</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="770" 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">
770
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<pre style="margin: 0;">+<span id="LC770" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- we make g mention h.</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="771" 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">
771
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<pre style="margin: 0;">+<span id="LC771" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="772" 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">
772
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<pre style="margin: 0;">+<span id="LC772" class="line" lang="haskell">    <span class="n" style="color: #333;">rule_uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">add_rule_uds</span> <span class="n" style="color: #333;">imp_rule_uds</span> <span class="n" style="color: #333;">rules_w_uds</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="773" 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">
773
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<pre style="margin: 0;">+<span id="LC773" class="line" lang="haskell">    <span class="n" style="color: #333;">add_rule_uds</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">l</span><span class="p">,</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="n" style="color: #333;">uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">l</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">r</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">uds</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="774" 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">
774
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC774" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="775" 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">
775
</td>
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<pre style="margin: 0;">+<span id="LC775" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">----------</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="836" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="776" 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">
776
</td>
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<pre style="margin: 0;">+<span id="LC776" class="line" lang="haskell">    <span class="n" style="color: #333;">occ</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idOccInfo</span> <span class="n" style="color: #333;">tagged_bndr</span></span>
</pre>
</td>
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<tr class="line_holder" id="" style="line-height: 1.6;">
<td class="diff-line-num old_line" data-linenumber="836" 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">
836
</td>
<td class="diff-line-num new_line" data-linenumber="777" 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">
777
</td>
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<pre style="margin: 0;"> <span id="LC777" class="line" lang="haskell">    <span class="n" style="color: #333;">certainly_inline</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Cascading inlines]</span></span>
</pre>
</td>
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<tr class="line_holder" id="" style="line-height: 1.6;">
<td class="diff-line-num old_line" data-linenumber="837" 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">
837
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<pre style="margin: 0;"> <span id="LC778" 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;">occ</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC779" class="line" lang="haskell">          <span class="kt" style="color: #458; font-weight: 600;">OneOcc</span> <span class="p">{</span> <span class="n" style="color: #333;">occ_in_lam</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NotInsideLam</span><span class="p">,</span> <span class="n" style="color: #333;">occ_n_br</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">1</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC787" 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="LC788" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRecBind</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ImpRuleEdges</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="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="LC789" 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="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="LC790" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- For a recursive group, we</span></span>
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<pre style="margin: 0;">+<span id="LC791" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      * occ-analyse all the RHSs</span></span>
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<pre style="margin: 0;">+<span id="LC792" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      * compute strongly-connected components</span></span>
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<pre style="margin: 0;">+<span id="LC793" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      * feed those components to occAnalRec</span></span>
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<pre style="margin: 0;">+<span id="LC794" 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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<pre style="margin: 0;"> <span id="LC795" 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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<pre style="margin: 0;"> <span id="LC796" 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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<pre style="margin: 0;">-<span id="LC851" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- For a recursive group, we</span></span>
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<pre style="margin: 0;">-<span id="LC852" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--      * occ-analyse all the RHSs</span></span>
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<pre style="margin: 0;">-<span id="LC853" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--      * compute strongly-connected components</span></span>
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<pre style="margin: 0;">-<span id="LC854" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--      * feed those components to occAnalRec</span></span>
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<pre style="margin: 0;">-<span id="LC855" 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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797
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<pre style="margin: 0;"> <span id="LC797" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
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857
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<td class="diff-line-num new_line" data-linenumber="798" 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">
798
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<pre style="margin: 0;"> <span id="LC798" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="858" 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">
858
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<td class="diff-line-num new_line" data-linenumber="799" 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">
799
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<pre style="margin: 0;"> <span id="LC799" 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>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="866" 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="807" 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">@@ -866,14 +807,6 @@ occAnalRecBind env lvl imp_rule_edges pairs body_usage</td>
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866
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<td class="diff-line-num new_line" data-linenumber="807" 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">
807
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<pre style="margin: 0;"> <span id="LC807" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="867" 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">
867
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<td class="diff-line-num new_line" data-linenumber="808" 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">
808
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<pre style="margin: 0;"> <span id="LC808" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="868" 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">
868
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<td class="diff-line-num new_line" data-linenumber="809" 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">
809
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<pre style="margin: 0;"> <span id="LC809" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="869" 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">
869
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<td class="diff-line-num new_line old" data-linenumber="810" 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="LC869" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="870" 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">
870
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<td class="diff-line-num new_line old" data-linenumber="810" 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="LC870" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Unfoldings and join points]</span></span>
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<td class="diff-line-num old old_line" data-linenumber="871" 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">
871
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<td class="diff-line-num new_line old" data-linenumber="810" 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="LC871" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="872" 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">
872
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<td class="diff-line-num new_line old" data-linenumber="810" 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="LC872" class="line" lang="haskell"></span>
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<td class="diff-line-num old old_line" data-linenumber="873" 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">
873
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<td class="diff-line-num new_line old" data-linenumber="810" 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="LC873" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We assume that anything in an unfolding occurs multiple times, since unfoldings</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="874" 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">
874
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<td class="diff-line-num new_line old" data-linenumber="810" 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="LC874" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">are often copied (that's the whole point!). But we still need to track tail</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="875" 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">
875
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<td class="diff-line-num new_line old" data-linenumber="810" 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="LC875" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">calls for the purpose of finding join points.</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="876" 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">
876
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<td class="diff-line-num new_line old" data-linenumber="810" 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="LC876" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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<td class="diff-line-num old_line" data-linenumber="877" 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">
877
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<td class="diff-line-num new_line" data-linenumber="810" 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">
810
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<pre style="margin: 0;"> <span id="LC810" class="line" lang="haskell"></span>
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<td class="diff-line-num old_line" data-linenumber="878" 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">
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<td class="diff-line-num new_line" data-linenumber="811" 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">
811
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<pre style="margin: 0;"> <span id="LC811" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------</span></span>
</pre>
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879
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<td class="diff-line-num new_line" data-linenumber="812" 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">
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<pre style="margin: 0;"> <span id="LC812" 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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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="893" 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="826" 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">@@ -893,8 +826,8 @@ occAnalRec _ lvl (AcyclicSCC (ND { nd_bndr = bndr, nd_rhs = rhs</td>
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893
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<pre style="margin: 0;"> <span id="LC826" class="line" lang="haskell">     <span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">tagged_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="894" 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">
894
</td>
<td class="diff-line-num new_line" data-linenumber="827" 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">
827
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC827" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="895" 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">
895
</td>
<td class="diff-line-num new_line" data-linenumber="828" 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">
828
</td>
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<pre style="margin: 0;"> <span id="LC828" 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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="896" 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">
896
</td>
<td class="diff-line-num new_line old" data-linenumber="829" 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="LC896" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs_uds'</span> <span class="o" style="font-weight: 600;"><span class="idiff left">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">adjustRhsUsage</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">willBeJoinId_maybe</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tagged_bndr</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">NonRecursive</span></span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="897" 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">
897
</td>
<td class="diff-line-num new_line old" data-linenumber="829" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC897" class="line" lang="haskell">                              <span class="n" style="color: #333;">rhs_bndrs</span> <span class="n" style="color: #333;">rhs_uds</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="898" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="829" 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">
829
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<pre style="margin: 0;">+<span id="LC829" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs_uds'</span> <span class="idiff left">  </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">adjustRhsUsage</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">NonRecursive</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">willBeJoinId_maybe</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tagged_bndr</span></span><span class="p"><span class="idiff right">)</span></span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="898" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="830" 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">
830
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<pre style="margin: 0;">+<span id="LC830" class="line" lang="haskell">                              <span class="idiff left right">  </span><span class="n" style="color: #333;">rhs_bndrs</span> <span class="n" style="color: #333;">rhs_uds</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="898" 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">
898
</td>
<td class="diff-line-num new_line" data-linenumber="831" 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">
831
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC831" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="899" 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">
899
</td>
<td class="diff-line-num new_line" data-linenumber="832" 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">
832
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<pre style="margin: 0;"> <span id="LC832" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- The Rec case is the interesting one</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="900" 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">
900
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<td class="diff-line-num new_line" data-linenumber="833" 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">
833
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC833" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- See Note [Recursive bindings: the grand plan]</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="910" 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="843" 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">@@ -910,15 +843,14 @@ occAnalRec env lvl (CyclicSCC details_s) (body_uds, binds)</td>
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<td class="diff-line-num old_line" data-linenumber="910" 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">
910
</td>
<td class="diff-line-num new_line" data-linenumber="843" 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">
843
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<pre style="margin: 0;"> <span id="LC843" 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>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="911" 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">
911
</td>
<td class="diff-line-num new_line" data-linenumber="844" 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">
844
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC844" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="912" 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">
912
</td>
<td class="diff-line-num new_line" data-linenumber="845" 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">
845
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC845" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="913" 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">
913
</td>
<td class="diff-line-num new_line old" data-linenumber="846" 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="LC913" 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>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="914" 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">
914
</td>
<td class="diff-line-num new_line old" data-linenumber="846" 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">
 
</td>
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<pre style="margin: 0;">-<span id="LC914" 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>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="915" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="846" 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">
846
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC846" 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>
</pre>
</td>
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<td class="diff-line-num old_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
</td>
<td class="diff-line-num new_line" data-linenumber="847" 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">
847
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC847" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_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
</td>
<td class="diff-line-num new_line" data-linenumber="848" 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">
848
</td>
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<pre style="margin: 0;"> <span id="LC848" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">------------------------------</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="917" 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">
917
</td>
<td class="diff-line-num new_line old" data-linenumber="849" 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="LC917" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- See Note [Choosing loop breakers] for loop_breaker_nodes</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="918" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="849" 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">
849
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<pre style="margin: 0;">+<span id="LC849" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Make the nodes for the loop-breaker analysis</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="918" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="850" 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">
850
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC850" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Choosing loop breakers] for loop_breaker_nodes</span></span>
</pre>
</td>
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<td class="diff-line-num old_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
</td>
<td class="diff-line-num new_line" data-linenumber="851" 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">
851
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<pre style="margin: 0;"> <span id="LC851" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="919" 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">
919
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<td class="diff-line-num new_line" data-linenumber="852" 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">
852
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<pre style="margin: 0;"> <span id="LC852" 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>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="920" 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">
920
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<td class="diff-line-num new_line old" data-linenumber="853" 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="LC920" 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>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="921" 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">
921
</td>
<td class="diff-line-num new_line old" data-linenumber="853" 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="LC921" 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;">bndr_set</span> <span class="n" style="color: #333;">body_uds</span> <span class="n" style="color: #333;">details_s</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="922" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="853" 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">
853
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<pre style="margin: 0;">+<span id="LC853" 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>
</pre>
</td>
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<td class="diff-line-num old_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
</td>
<td class="diff-line-num new_line" data-linenumber="854" 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">
854
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<pre style="margin: 0;"> <span id="LC854" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_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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<td class="diff-line-num new_line" data-linenumber="855" 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">
855
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<pre style="margin: 0;"> <span id="LC855" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">------------------------------</span></span>
</pre>
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<td class="diff-line-num old_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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<td class="diff-line-num new_line" data-linenumber="856" 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">
856
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<pre style="margin: 0;"> <span id="LC856" 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>
</pre>
</td>
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<td class="diff-line-num unfold js-unfold 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">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="859" 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">@@ -927,8 +859,8 @@ occAnalRec env lvl (CyclicSCC details_s) (body_uds, binds)</td>
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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="859" 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">
859
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<pre style="margin: 0;"> <span id="LC859" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">---------------------------</span></span>
</pre>
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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
</td>
<td class="diff-line-num new_line" data-linenumber="860" 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">
860
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<pre style="margin: 0;"> <span id="LC860" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Now reconstruct the cycle</span></span>
</pre>
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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
</td>
<td class="diff-line-num new_line" data-linenumber="861" 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">
861
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<pre style="margin: 0;"> <span id="LC861" 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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="930" 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">
930
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<td class="diff-line-num new_line old" data-linenumber="862" 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="LC930" 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>
</pre>
</td>
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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
</td>
<td class="diff-line-num new_line old" data-linenumber="862" 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="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>
</pre>
</td>
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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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="862" 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">
862
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<pre style="margin: 0;">+<span id="LC862" 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>
</pre>
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863
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<pre style="margin: 0;">+<span id="LC863" 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>
</pre>
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932
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864
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<pre style="margin: 0;"> <span id="LC864" 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>
</pre>
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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="865" 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">
865
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<pre style="margin: 0;"> <span id="LC865" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- all the edges in the original scope edges [remember,</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="934" 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">
934
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<td class="diff-line-num new_line" data-linenumber="866" 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">
866
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<pre style="margin: 0;"> <span id="LC866" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- weak_fvs is the difference between scope edges and</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold 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">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="869" 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">@@ -937,14 +869,151 @@ occAnalRec env lvl (CyclicSCC details_s) (body_uds, binds)</td>
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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="869" 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">
869
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<pre style="margin: 0;"> <span id="LC869" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- exactly that case</span></span>
</pre>
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938
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870
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<pre style="margin: 0;"> <span id="LC870" class="line" lang="haskell"></span>
</pre>
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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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871
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<pre style="margin: 0;"> <span id="LC871" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="940" 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">
940
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<td class="diff-line-num new_line old" data-linenumber="872" 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="LC940" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------------------------------------</span></span>
</pre>
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941
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<td class="diff-line-num new_line old" data-linenumber="872" 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="c1" style="color: #998; font-style: italic;">--                 Loop breaking</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="872" 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="c1" style="color: #998; font-style: italic;">------------------------------------------------------------------</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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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872
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<pre style="margin: 0;">+<span id="LC872" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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="873" 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">
873
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<pre style="margin: 0;">+<span id="LC873" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="874" 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">
874
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<pre style="margin: 0;">+<span id="LC874" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                Loop breaking</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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="875" 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">
875
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<pre style="margin: 0;">+<span id="LC875" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC876" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">********************************************************************* -}</span></span>
</pre>
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877
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<pre style="margin: 0;">+<span id="LC877" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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="878" 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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<pre style="margin: 0;">+<span id="LC878" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Choosing loop breakers]</span></span>
</pre>
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879
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<pre style="margin: 0;">+<span id="LC879" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC880" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Loop breaking is surprisingly subtle.  First read the section 4 of</span></span>
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881
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<pre style="margin: 0;">+<span id="LC881" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">"Secrets of the GHC inliner".  This describes our basic plan.</span></span>
</pre>
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882
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<pre style="margin: 0;">+<span id="LC882" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We avoid infinite inlinings by choosing loop breakers, and</span></span>
</pre>
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883
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<pre style="margin: 0;">+<span id="LC883" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">ensuring that a loop breaker cuts each loop.</span></span>
</pre>
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884
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<pre style="margin: 0;">+<span id="LC884" class="line" lang="haskell"></span>
</pre>
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885
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<pre style="margin: 0;">+<span id="LC885" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">See also Note [Inlining and hs-boot files] in GHC.Core.ToIface, which</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="886" 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">
886
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<pre style="margin: 0;">+<span id="LC886" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">deals with a closely related source of infinite loops.</span></span>
</pre>
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887
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<pre style="margin: 0;">+<span id="LC887" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="888" 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">
888
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<pre style="margin: 0;">+<span id="LC888" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Fundamentally, we do SCC analysis on a graph.  For each recursive</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="889" 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">
889
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<pre style="margin: 0;">+<span id="LC889" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">group we choose a loop breaker, delete all edges to that node,</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="890" 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">
890
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<pre style="margin: 0;">+<span id="LC890" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">re-analyse the SCC, and iterate.</span></span>
</pre>
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891
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<pre style="margin: 0;">+<span id="LC891" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="892" 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">
892
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<pre style="margin: 0;">+<span id="LC892" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But what is the graph?  NOT the same graph as was used for Note</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="893" 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">
893
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<pre style="margin: 0;">+<span id="LC893" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">[Forming Rec groups]!  In particular, a RULE is like an equation for</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="894" 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">
894
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<pre style="margin: 0;">+<span id="LC894" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">'f' that is *always* inlined if it is applicable.  We do *not* disable</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="895" 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">
895
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<pre style="margin: 0;">+<span id="LC895" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">rules for loop-breakers.  It's up to whoever makes the rules to make</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="896" 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">
896
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<pre style="margin: 0;">+<span id="LC896" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">sure that the rules themselves always terminate.  See Note [Rules for</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="897" 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">
897
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<pre style="margin: 0;">+<span id="LC897" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">recursive functions] in GHC.Core.Opt.Simplify</span></span>
</pre>
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898
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<pre style="margin: 0;">+<span id="LC898" class="line" lang="haskell"></span>
</pre>
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899
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<pre style="margin: 0;">+<span id="LC899" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Hence, if</span></span>
</pre>
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900
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<pre style="margin: 0;">+<span id="LC900" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    f's RHS (or its INLINE template if it has one) mentions g, and</span></span>
</pre>
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901
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<pre style="margin: 0;">+<span id="LC901" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    g has a RULE that mentions h, and</span></span>
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902
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<pre style="margin: 0;">+<span id="LC902" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    h has a RULE that mentions f</span></span>
</pre>
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903
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<pre style="margin: 0;">+<span id="LC903" class="line" lang="haskell"></span>
</pre>
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904
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<pre style="margin: 0;">+<span id="LC904" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">then we *must* choose f to be a loop breaker.  Example: see Note</span></span>
</pre>
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905
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<pre style="margin: 0;">+<span id="LC905" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">[Specialisation rules].</span></span>
</pre>
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906
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<pre style="margin: 0;">+<span id="LC906" class="line" lang="haskell"></span>
</pre>
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907
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<pre style="margin: 0;">+<span id="LC907" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In general, take the free variables of f's RHS, and augment it with</span></span>
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908
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<pre style="margin: 0;">+<span id="LC908" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">all the variables reachable by RULES from those starting points.  That</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="909" 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">
909
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<pre style="margin: 0;">+<span id="LC909" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is the whole reason for computing rule_fv_env in occAnalBind.  (Of</span></span>
</pre>
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910
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<pre style="margin: 0;">+<span id="LC910" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">course we only consider free vars that are also binders in this Rec</span></span>
</pre>
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911
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<pre style="margin: 0;">+<span id="LC911" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">group.)  See also Note [Finding rule RHS free vars]</span></span>
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912
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<pre style="margin: 0;">+<span id="LC912" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="913" 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">
913
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<pre style="margin: 0;">+<span id="LC913" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that when we compute this rule_fv_env, we only consider variables</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="914" 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">
914
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<pre style="margin: 0;">+<span id="LC914" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">free in the *RHS* of the rule, in contrast to the way we build the</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="915" 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">
915
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<pre style="margin: 0;">+<span id="LC915" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Rec group in the first place (Note [Rule dependency info])</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="916" 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">
916
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<pre style="margin: 0;">+<span id="LC916" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="917" 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">
917
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<pre style="margin: 0;">+<span id="LC917" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that if 'g' has RHS that mentions 'w', we should add w to</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="918" 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">
918
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<pre style="margin: 0;">+<span id="LC918" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">g's loop-breaker edges.  More concretely there is an edge from f -> g</span></span>
</pre>
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919
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<pre style="margin: 0;">+<span id="LC919" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">iff</span></span>
</pre>
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920
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<pre style="margin: 0;">+<span id="LC920" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        (a) g is mentioned in f's RHS `xor` f's INLINE rhs</span></span>
</pre>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="921" 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">
921
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<pre style="margin: 0;">+<span id="LC921" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            (see Note [Inline rules])</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="922" 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">
922
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC922" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        (b) or h is mentioned in f's RHS, and</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="923" 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">
923
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC923" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            g appears in the RHS of an active RULE of h</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="924" 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">
924
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC924" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            or a /transitive sequence/ of /active rules/ starting with h</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_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">
925
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC925" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="926" 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">
926
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC926" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Why "active rules"?  See Note [Finding rule RHS free vars]</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="927" 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">
927
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC927" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="928" 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">
928
</td>
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<pre style="margin: 0;">+<span id="LC928" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Why "transitive sequence"?  Because active rules apply</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="929" 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">
929
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC929" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">unconditionallly, without checking loop-breaker-ness.</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="930" 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">
930
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC930" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">See Note [Loop breaker dependencies].</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="931" 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">
931
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC931" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_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">
932
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC932" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that in Example [eftInt], *neither* eftInt *nor* eftIntFB is</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="933" 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">
933
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC933" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">chosen as a loop breaker, because their RHSs don't mention each other.</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="934" 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">
934
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC934" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">And indeed both can be inlined safely.</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="935" 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">
935
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC935" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="936" 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">
936
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC936" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note again that the edges of the graph we use for computing loop breakers</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="937" 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">
937
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC937" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">are not the same as the edges we use for computing the Rec blocks.</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="938" 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">
938
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC938" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">That's why we use</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="939" 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">
939
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC939" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="940" 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">
940
</td>
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<pre style="margin: 0;">+<span id="LC940" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">- makeNode             for the Rec block analysis</span></span>
</pre>
</td>
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<td class="diff-line-num new new_line" data-linenumber="941" 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">
941
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<pre style="margin: 0;">+<span id="LC941" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">- makeLoopBreakerNodes for the loop breaker analysis</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="942" 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">
942
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<pre style="margin: 0;">+<span id="LC942" class="line" lang="haskell"></span>
</pre>
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943
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<pre style="margin: 0;">+<span id="LC943" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Note [Finding rule RHS free vars]</span></span>
</pre>
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944
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<pre style="margin: 0;">+<span id="LC944" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="945" 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">
945
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<pre style="margin: 0;">+<span id="LC945" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Consider this real example from Data Parallel Haskell</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="946" 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">
946
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<pre style="margin: 0;">+<span id="LC946" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         tagZero :: Array Int -> Array Tag</span></span>
</pre>
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947
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<pre style="margin: 0;">+<span id="LC947" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         {-# INLINE [1] tagZeroes #-}</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="948" 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">
948
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<pre style="margin: 0;">+<span id="LC948" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         tagZero xs = pmap (\x -> fromBool (x==0)) xs</span></span>
</pre>
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949
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<pre style="margin: 0;">+<span id="LC949" class="line" lang="haskell"></span>
</pre>
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950
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<pre style="margin: 0;">+<span id="LC950" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         {-# RULES "tagZero" [~1] forall xs n.</span></span>
</pre>
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951
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<pre style="margin: 0;">+<span id="LC951" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">             pmap fromBool <blah blah> = tagZero xs #-}</span></span>
</pre>
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952
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<pre style="margin: 0;">+<span id="LC952" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    So tagZero's RHS mentions pmap, and pmap's RULE mentions tagZero.</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="953" 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">
953
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<pre style="margin: 0;">+<span id="LC953" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    However, tagZero can only be inlined in phase 1 and later, while</span></span>
</pre>
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954
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<pre style="margin: 0;">+<span id="LC954" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    the RULE is only active *before* phase 1.  So there's no problem.</span></span>
</pre>
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955
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<pre style="margin: 0;">+<span id="LC955" class="line" lang="haskell"></span>
</pre>
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956
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<pre style="margin: 0;">+<span id="LC956" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    To make this work, we look for the RHS free vars only for</span></span>
</pre>
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957
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<pre style="margin: 0;">+<span id="LC957" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    *active* rules. That's the reason for the occ_rule_act field</span></span>
</pre>
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958
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<pre style="margin: 0;">+<span id="LC958" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    of the OccEnv.</span></span>
</pre>
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959
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<pre style="margin: 0;">+<span id="LC959" class="line" lang="haskell"></span>
</pre>
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960
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<pre style="margin: 0;">+<span id="LC960" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Note [Weak loop breakers]</span></span>
</pre>
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</td>
<td class="diff-line-num new new_line" data-linenumber="961" 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">
961
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<pre style="margin: 0;">+<span id="LC961" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    ~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="962" 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">
962
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<pre style="margin: 0;">+<span id="LC962" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    There is a last nasty wrinkle.  Suppose we have</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="963" 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">
963
</td>
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<pre style="margin: 0;">+<span id="LC963" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="964" 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">
964
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<pre style="margin: 0;">+<span id="LC964" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        Rec { f = f_rhs</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="965" 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">
965
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<pre style="margin: 0;">+<span id="LC965" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">              RULE f [] = g</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="966" 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">
966
</td>
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<pre style="margin: 0;">+<span id="LC966" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="967" 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">
967
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<pre style="margin: 0;">+<span id="LC967" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">              h = h_rhs</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="968" 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">
968
</td>
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<pre style="margin: 0;">+<span id="LC968" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">              g = h</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="969" 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">
969
</td>
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<pre style="margin: 0;">+<span id="LC969" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">              ...more...</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="970" 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">
970
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC970" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        }</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="971" 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">
971
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC971" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="972" 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">
972
</td>
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<pre style="margin: 0;">+<span id="LC972" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Remember that we simplify the RULES before any RHS (see Note</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="973" 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">
973
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC973" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    [Rules are visible in their own rec group] above).</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="974" 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">
974
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC974" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="975" 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">
975
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC975" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    So we must *not* postInlineUnconditionally 'g', even though</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="976" 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">
976
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC976" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    its RHS turns out to be trivial.  (I'm assuming that 'g' is</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="977" 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">
977
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC977" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    not chosen as a loop breaker.)  Why not?  Because then we</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="978" 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">
978
</td>
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<pre style="margin: 0;">+<span id="LC978" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    drop the binding for 'g', which leaves it out of scope in the</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="979" 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">
979
</td>
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<pre style="margin: 0;">+<span id="LC979" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    RULE!</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="980" 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">
980
</td>
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<pre style="margin: 0;">+<span id="LC980" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="981" 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">
981
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<pre style="margin: 0;">+<span id="LC981" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Here's a somewhat different example of the same thing</span></span>
</pre>
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</td>
<td class="diff-line-num new new_line" data-linenumber="982" 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">
982
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<pre style="margin: 0;">+<span id="LC982" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        Rec { g = h</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="983" 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">
983
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<pre style="margin: 0;">+<span id="LC983" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            ; h = ...f...</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="984" 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">
984
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<pre style="margin: 0;">+<span id="LC984" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            ; f = f_rhs</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="985" 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">
985
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<pre style="margin: 0;">+<span id="LC985" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">              RULE f [] = g }</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="986" 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">
986
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<pre style="margin: 0;">+<span id="LC986" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Here the RULE is "below" g, but we *still* can't postInlineUnconditionally</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="987" 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">
987
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<pre style="margin: 0;">+<span id="LC987" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    g, because the RULE for f is active throughout.  So the RHS of h</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="988" 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">
988
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<pre style="margin: 0;">+<span id="LC988" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    might rewrite to     h = ...g...</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="989" 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">
989
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<pre style="margin: 0;">+<span id="LC989" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    So g must remain in scope in the output program!</span></span>
</pre>
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</td>
<td class="diff-line-num new new_line" data-linenumber="990" 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">
990
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<pre style="margin: 0;">+<span id="LC990" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="991" 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">
991
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<pre style="margin: 0;">+<span id="LC991" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    We "solve" this by:</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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="992" 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">
992
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<pre style="margin: 0;">+<span id="LC992" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="993" 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">
993
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<pre style="margin: 0;">+<span id="LC993" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        Make g a "weak" loop breaker (OccInfo = IAmLoopBreaker True)</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="994" 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">
994
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<pre style="margin: 0;">+<span id="LC994" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        iff g is a "missing free variable" of the Rec group</span></span>
</pre>
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</td>
<td class="diff-line-num new new_line" data-linenumber="995" 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">
995
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<pre style="margin: 0;">+<span id="LC995" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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="996" 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">
996
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<pre style="margin: 0;">+<span id="LC996" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    A "missing free variable" x is one that is mentioned in an RHS or</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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="997" 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">
997
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<pre style="margin: 0;">+<span id="LC997" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    INLINE or RULE of a binding in the Rec group, but where the</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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="998" 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">
998
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<pre style="margin: 0;">+<span id="LC998" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    dependency on x may not show up in the loop_breaker_nodes (see</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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="999" 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">
999
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<pre style="margin: 0;">+<span id="LC999" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    note [Choosing loop breakers} above).</span></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="1000" 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">
1000
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<pre style="margin: 0;">+<span id="LC1000" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new new_line" data-linenumber="1001" 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">
1001
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<pre style="margin: 0;">+<span id="LC1001" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    A normal "strong" loop breaker has IAmLoopBreaker False.  So</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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="1002" 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">
1002
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<pre style="margin: 0;">+<span id="LC1002" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1003" 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">
1003
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<pre style="margin: 0;">+<span id="LC1003" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                                    Inline  postInlineUnconditionally</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1004" 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">
1004
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<pre style="margin: 0;">+<span id="LC1004" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   strong   IAmLoopBreaker False    no      no</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1005" 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">
1005
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<pre style="margin: 0;">+<span id="LC1005" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   weak     IAmLoopBreaker True     yes     no</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1006" 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">
1006
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<pre style="margin: 0;">+<span id="LC1006" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            other                   yes     yes</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1007" 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">
1007
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<pre style="margin: 0;">+<span id="LC1007" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1008" 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">
1008
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<pre style="margin: 0;">+<span id="LC1008" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    The **sole** reason for this kind of loop breaker is so that</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1009" 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">
1009
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<pre style="margin: 0;">+<span id="LC1009" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    postInlineUnconditionally does not fire.  Ugh.  (Typically it'll</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1010" 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">
1010
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<pre style="margin: 0;">+<span id="LC1010" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    inline via the usual callSiteInline stuff, so it'll be dead in the</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1011" 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">
1011
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<pre style="margin: 0;">+<span id="LC1011" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    next pass, so the main Ugh is the tiresome complication.)</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="943" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1012" 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">
1012
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<pre style="margin: 0;">+<span id="LC1012" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="943" 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">
943
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<td class="diff-line-num new_line" data-linenumber="1013" 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">
1013
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<pre style="margin: 0;"> <span id="LC1013" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="944" 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">
944
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<td class="diff-line-num new_line" data-linenumber="1014" 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">
1014
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<pre style="margin: 0;"> <span id="LC1014" 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>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="945" 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">
945
</td>
<td class="diff-line-num new_line" data-linenumber="1015" 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">
1015
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<pre style="margin: 0;"> <span id="LC1015" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="946" 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">
946
</td>
<td class="diff-line-num new_line" data-linenumber="1016" 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">
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="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="947" 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">
947
</td>
<td class="diff-line-num new_line old" data-linenumber="1017" 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="LC947" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="948" 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">
948
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<td class="diff-line-num new_line" data-linenumber="1017" 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">
1017
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<pre style="margin: 0;"> <span id="LC1017" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="949" 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">
949
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<td class="diff-line-num new_line" data-linenumber="1018" 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">
1018
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<pre style="margin: 0;"> <span id="LC1018" class="line" lang="haskell">                                <span class="c1" style="color: #998; font-style: italic;">-- See Note [Weak loop breakers]</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="950" 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">
950
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<td class="diff-line-num new_line" data-linenumber="1019" 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">
1019
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<pre style="margin: 0;"> <span id="LC1019" 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>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="968" 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="1037" 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">@@ -968,7 +1037,7 @@ recording inlinings for any Ids which aren't marked as "no-inline" as it goes.</td>
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<td class="diff-line-num old_line" data-linenumber="968" 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">
968
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<td class="diff-line-num new_line" data-linenumber="1037" 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">
1037
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<pre style="margin: 0;"> <span id="LC1037" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="969" 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">
969
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<td class="diff-line-num new_line" data-linenumber="1038" 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">
1038
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<pre style="margin: 0;"> <span id="LC1038" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="970" 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">
970
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<td class="diff-line-num new_line" data-linenumber="1039" 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">
1039
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<pre style="margin: 0;"> <span id="LC1039" 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>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="971" 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">
971
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<td class="diff-line-num new_line old" data-linenumber="1040" 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="LC971" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="972" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1040" 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">
1040
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<pre style="margin: 0;">+<span id="LC1040" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="972" 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">
972
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<td class="diff-line-num new_line" data-linenumber="1041" 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">
1041
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<pre style="margin: 0;"> <span id="LC1041" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="973" 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">
973
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<td class="diff-line-num new_line" data-linenumber="1042" 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">
1042
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<pre style="margin: 0;"> <span id="LC1042" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="974" 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">
974
</td>
<td class="diff-line-num new_line" data-linenumber="1043" 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">
1043
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<pre style="margin: 0;"> <span id="LC1043" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
</td>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="977" 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="1046" 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">@@ -977,20 +1046,20 @@ loopBreakNodes depth bndr_set weak_fvs nodes binds</td>
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<td class="diff-line-num old_line" data-linenumber="977" 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">
977
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<td class="diff-line-num new_line" data-linenumber="1046" 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">
1046
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<pre style="margin: 0;"> <span id="LC1046" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="978" 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">
978
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<td class="diff-line-num new_line" data-linenumber="1047" 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">
1047
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<pre style="margin: 0;"> <span id="LC1047" 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>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="979" 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">
979
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<td class="diff-line-num new_line" data-linenumber="1048" 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">
1048
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<pre style="margin: 0;"> <span id="LC1048" 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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="980" 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">
980
</td>
<td class="diff-line-num new_line old" data-linenumber="1049" 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="LC980" 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;"><span class="idiff left">mk_non_loop_breaker</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">weak_fvs</span></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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="981" 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">
981
</td>
<td class="diff-line-num new_line old" data-linenumber="1049" 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="LC981" 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>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="982" 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="1049" 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">
1049
</td>
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<pre style="margin: 0;">+<span id="LC1049" 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;"><span class="idiff left">nodeBinding</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">mk_non_loop_breaker</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">weak_fvs</span></span><span class="p"><span class="idiff right">)</span></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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="982" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1050" 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">
1050
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<pre style="margin: 0;">+<span id="LC1050" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="982" 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">
982
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<td class="diff-line-num new_line" data-linenumber="1051" 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">
1051
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1051" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="983" 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">
983
</td>
<td class="diff-line-num new_line" data-linenumber="1052" 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">
1052
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1052" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">----------------------------------</span></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="984" 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">
984
</td>
<td class="diff-line-num new_line old" data-linenumber="1053" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC984" 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>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="985" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1053" 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">
1053
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1053" 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>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="985" 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">
985
</td>
<td class="diff-line-num new_line" data-linenumber="1054" 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">
1054
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<pre style="margin: 0;"> <span id="LC1054" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Choose a loop breaker, mark it no-inline,</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="986" 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">
986
</td>
<td class="diff-line-num new_line" data-linenumber="1055" 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">
1055
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<pre style="margin: 0;"> <span id="LC1055" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- and call loopBreakNodes on the rest</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="987" 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">
987
</td>
<td class="diff-line-num new_line old" data-linenumber="1056" 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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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC987" 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>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="988" 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">
988
</td>
<td class="diff-line-num new_line old" data-linenumber="1056" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC988" 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"> </span><span class="p"><span class="idiff">[</span></span><span class="n" style="color: #333;"><span class="idiff">node</span></span><span class="p"><span class="idiff">]</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">binds</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">=</span></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>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="989" 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">
989
</td>
<td class="diff-line-num new_line old" data-linenumber="1056" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC989" 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>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="990" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1056" 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">
1056
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1056" 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>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="990" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1057" 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">
1057
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1057" 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 class="idiff left">[</span></span><span class="n" style="color: #333;"><span class="idiff">node</span></span><span class="p"><span class="idiff">]</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">binds</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">nodeBinding</span></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>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="990" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1058" 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">
1058
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1058" 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>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="990" 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">
990
</td>
<td class="diff-line-num new_line" data-linenumber="1059" 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">
1059
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<pre style="margin: 0;"> <span id="LC1059" 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>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="991" 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">
991
</td>
<td class="diff-line-num new_line" data-linenumber="1060" 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">
1060
</td>
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<pre style="margin: 0;"> <span id="LC1060" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--                               , text "chosen" <+> ppr chosen_nodes ]) $</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="992" 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">
992
</td>
<td class="diff-line-num new_line old" data-linenumber="1061" 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="LC992" 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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="993" 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">
993
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<td class="diff-line-num new_line old" data-linenumber="1061" 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="LC993" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;"><span class="idiff left right">mk_loop_breaker</span></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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="994" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1061" 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">
1061
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<pre style="margin: 0;">+<span id="LC1061" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="994" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1062" 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">
1062
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<pre style="margin: 0;">+<span id="LC1062" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">nodeBinding</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mk_loop_breaker</span></span><span class="p"><span class="idiff right">)</span></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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="994" 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">
994
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<td class="diff-line-num new_line" data-linenumber="1063" 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">
1063
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<pre style="margin: 0;"> <span id="LC1063" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="995" 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">
995
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<td class="diff-line-num new_line" data-linenumber="1064" 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">
1064
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<pre style="margin: 0;"> <span id="LC1064" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="996" 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">
996
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<td class="diff-line-num new_line" data-linenumber="1065" 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">
1065
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<pre style="margin: 0;"> <span id="LC1065" class="line" lang="haskell">                                                 <span class="p">(</span><span class="n" style="color: #333;">nd_score</span> <span class="p">(</span><span class="n" style="color: #333;">node_payload</span> <span class="n" style="color: #333;">node</span><span class="p">))</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1002" 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="1071" 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">@@ -1002,20 +1071,24 @@ reOrderNodes depth bndr_set weak_fvs (node : nodes) binds</td>
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<td class="diff-line-num old_line" data-linenumber="1002" 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">
1002
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<td class="diff-line-num new_line" data-linenumber="1071" 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">
1071
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<pre style="margin: 0;"> <span id="LC1071" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- After two iterations (d=0, d=1) give up</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1003" 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">
1003
</td>
<td class="diff-line-num new_line" data-linenumber="1072" 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">
1072
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<pre style="margin: 0;"> <span id="LC1072" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- and approximate, returning to d=0</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1004" 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">
1004
</td>
<td class="diff-line-num new_line" data-linenumber="1073" 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">
1073
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<pre style="margin: 0;"> <span id="LC1073" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1005" 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">
1005
</td>
<td class="diff-line-num new_line old" data-linenumber="1074" 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="LC1005" class="line" lang="haskell"><span class="n" style="color: #333;">mk_loop_breaker</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LetrecNode</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Binding</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1006" 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">
1006
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<td class="diff-line-num new_line old" data-linenumber="1074" 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="LC1006" class="line" lang="haskell"><span class="n" style="color: #333;">mk_loop_breaker</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;">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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1007" 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">
1007
</td>
<td class="diff-line-num new_line old" data-linenumber="1074" 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="LC1007" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span> <span class="p">`</span><span class="n" style="color: #333;">setIdOccInfo</span><span class="p">`</span> <span class="n" style="color: #333;">strongLoopBreaker</span> <span class="p">{</span> <span class="n" style="color: #333;">occ_tail</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tail_info</span> <span class="p">},</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1008" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1074" 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">
1074
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<pre style="margin: 0;">+<span id="LC1074" class="line" lang="haskell"><span class="n" style="color: #333;">nodeBinding</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LetrecNode</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Binding</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1008" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1075" 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">
1075
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<pre style="margin: 0;">+<span id="LC1075" class="line" lang="haskell"><span class="n" style="color: #333;">nodeBinding</span> <span class="n" style="color: #333;">set_id_occ</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;">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>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1008" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1076" 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">
1076
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<pre style="margin: 0;">+<span id="LC1076" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">set_id_occ</span> <span class="n" style="color: #333;">bndr</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1008" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1077" 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">
1077
</td>
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<pre style="margin: 0;">+<span id="LC1077" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1008" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1078" 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">
1078
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<pre style="margin: 0;">+<span id="LC1078" class="line" lang="haskell"><span class="n" style="color: #333;">mk_loop_breaker</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>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1008" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1079" 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">
1079
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1079" class="line" lang="haskell"><span class="n" style="color: #333;">mk_loop_breaker</span> <span class="n" style="color: #333;">bndr</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1008" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1080" 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">
1080
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1080" class="line" lang="haskell">  <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;">setIdOccInfo</span><span class="p">`</span> <span class="n" style="color: #333;">occ'</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1008" 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">
1008
</td>
<td class="diff-line-num new_line" data-linenumber="1081" 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">
1081
</td>
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<pre style="margin: 0;"> <span id="LC1081" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1009" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1082" 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">
1082
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1082" class="line" lang="haskell">    <span class="n" style="color: #333;">occ'</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">strongLoopBreaker</span> <span class="p">{</span> <span class="n" style="color: #333;">occ_tail</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tail_info</span> <span class="p">}</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1009" 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">
1009
</td>
<td class="diff-line-num new_line" data-linenumber="1083" 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">
1083
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<pre style="margin: 0;"> <span id="LC1083" class="line" lang="haskell">    <span class="n" style="color: #333;">tail_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tailCallInfo</span> <span class="p">(</span><span class="n" style="color: #333;">idOccInfo</span> <span class="n" style="color: #333;">bndr</span><span class="p">)</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1010" 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">
1010
</td>
<td class="diff-line-num new_line" data-linenumber="1084" 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">
1084
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1084" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1011" 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">
1011
</td>
<td class="diff-line-num new_line old" data-linenumber="1085" 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">
 
</td>
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<pre style="margin: 0;">-<span id="LC1011" class="line" lang="haskell"><span class="n" style="color: #333;">mk_non_loop_breaker</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">LetrecNode</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Binding</span></span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1012" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1085" 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">
1085
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<pre style="margin: 0;">+<span id="LC1085" class="line" lang="haskell"><span class="n" style="color: #333;">mk_non_loop_breaker</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">Id</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Id</span></span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old_line" data-linenumber="1012" 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">
1012
</td>
<td class="diff-line-num new_line" data-linenumber="1086" 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">
1086
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<pre style="margin: 0;"> <span id="LC1086" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Weak loop breakers]</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1013" 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">
1013
</td>
<td class="diff-line-num new_line old" data-linenumber="1087" 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="LC1013" class="line" lang="haskell"><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_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;">bndr</span></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1014" 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">
1014
</td>
<td class="diff-line-num new_line old" data-linenumber="1087" 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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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1014" class="line" lang="haskell">                                                 <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>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1015" 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">
1015
</td>
<td class="diff-line-num new_line old" data-linenumber="1087" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1015" class="line" lang="haskell">  <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;">weak_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">setIdOccInfo</span> <span class="n" style="color: #333;">bndr</span> <span class="n" style="color: #333;">occ'</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1016" 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">
1016
</td>
<td class="diff-line-num new_line old" data-linenumber="1087" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1016" 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="n" style="color: #333;">bndr</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1017" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1087" 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">
1087
</td>
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<pre style="margin: 0;">+<span id="LC1087" class="line" lang="haskell"><span class="n" style="color: #333;">mk_non_loop_breaker</span> <span class="n" style="color: #333;">weak_fvs</span> <span class="n" style="color: #333;">bndr</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1017" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1088" 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">
1088
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1088" class="line" lang="haskell">  <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;">weak_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setIdOccInfo</span> <span class="n" style="color: #333;">bndr</span> <span class="n" style="color: #333;">occ'</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1017" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1089" 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">
1089
</td>
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<pre style="margin: 0;">+<span id="LC1089" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1017" 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">
1017
</td>
<td class="diff-line-num new_line" data-linenumber="1090" 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">
1090
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1090" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1018" 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">
1018
</td>
<td class="diff-line-num new_line old" data-linenumber="1091" 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="LC1018" class="line" lang="haskell">    <span class="n" style="color: #333;">occ'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">weakLoopBreaker</span> <span class="p">{</span> <span class="n" style="color: #333;">occ_tail</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tail_info</span> <span class="p">}</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1019" 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="1091" 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">
1091
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<pre style="margin: 0;">+<span id="LC1091" class="line" lang="haskell">    <span class="n" style="color: #333;">occ'</span> <span class="idiff left right">     </span><span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">weakLoopBreaker</span> <span class="p">{</span> <span class="n" style="color: #333;">occ_tail</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tail_info</span> <span class="p">}</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1019" 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">
1019
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<td class="diff-line-num new_line" data-linenumber="1092" 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">
1092
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<pre style="margin: 0;"> <span id="LC1092" class="line" lang="haskell">    <span class="n" style="color: #333;">tail_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tailCallInfo</span> <span class="p">(</span><span class="n" style="color: #333;">idOccInfo</span> <span class="n" style="color: #333;">bndr</span><span class="p">)</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1020" 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">
1020
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<td class="diff-line-num new_line" data-linenumber="1093" 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">
1093
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1093" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1021" 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">
1021
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<td class="diff-line-num new_line" data-linenumber="1094" 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">
1094
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<pre style="margin: 0;"> <span id="LC1094" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">----------------------------------</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1178" 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="1251" 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">@@ -1178,11 +1251,6 @@ ToDo: try using the occurrence info for the inline'd binder.</td>
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1178
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<td class="diff-line-num new_line" data-linenumber="1251" 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">
1251
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<pre style="margin: 0;"> <span id="LC1251" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1179" 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">
1179
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<td class="diff-line-num new_line" data-linenumber="1252" 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">
1252
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1252" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1180" 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">
1180
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<td class="diff-line-num new_line" data-linenumber="1253" 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">
1253
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1253" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1181" 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">
1181
</td>
<td class="diff-line-num new_line old" data-linenumber="1254" 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="LC1181" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">ImpRuleEdges</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 class="c1" style="color: #998; font-style: italic;">-- Mapping from FVs of imported RULE LHSs to RHS FVs</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1182" 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">
1182
</td>
<td class="diff-line-num new_line old" data-linenumber="1254" 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="LC1182" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1183" 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">
1183
</td>
<td class="diff-line-num new_line old" data-linenumber="1254" 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">
 
</td>
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<pre style="margin: 0;">-<span id="LC1183" class="line" lang="haskell"><span class="n" style="color: #333;">noImpRuleEdges</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ImpRuleEdges</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="1184" 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">
1184
</td>
<td class="diff-line-num new_line old" data-linenumber="1254" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1184" class="line" lang="haskell"><span class="n" style="color: #333;">noImpRuleEdges</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyVarEnv</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1185" 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">
1185
</td>
<td class="diff-line-num new_line old" data-linenumber="1254" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1185" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1186" 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">
1186
</td>
<td class="diff-line-num new_line" data-linenumber="1254" 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">
1254
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<pre style="margin: 0;"> <span id="LC1254" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">LetrecNode</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span> <span class="kt" style="color: #458; font-weight: 600;">Unique</span> <span class="kt" style="color: #458; font-weight: 600;">Details</span>  <span class="c1" style="color: #998; font-style: italic;">-- Node comes from Digraph</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1187" 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">
1187
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<td class="diff-line-num new_line" data-linenumber="1255" 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">
1255
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<pre style="margin: 0;"> <span id="LC1255" class="line" lang="haskell">                                       <span class="c1" style="color: #998; font-style: italic;">-- The Unique key is gotten from the Id</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1188" 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">
1188
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<td class="diff-line-num 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">
1256
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<pre style="margin: 0;"> <span id="LC1256" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">Details</span></span>
</pre>
</td>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1209" 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="1277" 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">@@ -1209,7 +1277,8 @@ data Details</td>
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<td class="diff-line-num old_line" data-linenumber="1209" 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">
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<pre style="margin: 0;"> <span id="LC1277" class="line" lang="haskell">                                <span class="c1" style="color: #998; font-style: italic;">-- dependencies might not be respected by loop_breaker_nodes</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1210" 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">
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<td class="diff-line-num new_line" data-linenumber="1278" 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">
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<pre style="margin: 0;"> <span id="LC1278" class="line" lang="haskell">                                <span class="c1" style="color: #998; font-style: italic;">-- See Note [Weak loop breakers]</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1211" 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">
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<td class="diff-line-num new_line" data-linenumber="1279" 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">
1279
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<pre style="margin: 0;"> <span id="LC1279" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1212" 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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<td class="diff-line-num new_line old" data-linenumber="1280" 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="LC1212" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1213" 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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<pre style="margin: 0;">+<span id="LC1280" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1213" 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="1281" 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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<pre style="margin: 0;">+<span id="LC1281" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1213" 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">
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<td class="diff-line-num new_line" data-linenumber="1282" 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">
1282
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<pre style="margin: 0;"> <span id="LC1282" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1214" 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">
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<td class="diff-line-num new_line" data-linenumber="1283" 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">
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<pre style="margin: 0;"> <span id="LC1283" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1215" 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">
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<td class="diff-line-num new_line" data-linenumber="1284" 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">
1284
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<pre style="margin: 0;"> <span id="LC1284" 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="1220" 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="1289" 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">@@ -1220,7 +1289,7 @@ instance Outputable Details where</td>
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<pre style="margin: 0;"> <span id="LC1289" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1221" 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">
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<td class="diff-line-num 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">
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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;">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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1222" 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">
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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">
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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;">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>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1223" 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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<td class="diff-line-num new_line old" data-linenumber="1292" 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="LC1223" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1224" 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="1292" 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">
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;">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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1224" 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">
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<td class="diff-line-num new_line" data-linenumber="1293" 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">
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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;">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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1225" 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">
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<td class="diff-line-num new_line" data-linenumber="1294" 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">
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<pre style="margin: 0;"> <span id="LC1294" class="line" lang="haskell">             <span class="p">])</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC1295" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1241" 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="1310" 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">@@ -1241,7 +1310,9 @@ makeNode :: OccEnv -> ImpRuleEdges -> VarSet</td>
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<pre style="margin: 0;"> <span id="LC1310" 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;">Var</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LetrecNode</span></span>
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<pre style="margin: 0;"> <span id="LC1311" 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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<pre style="margin: 0;"> <span id="LC1312" class="line" lang="haskell"><span class="n" style="color: #333;">makeNode</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">imp_rule_edges</span> <span class="n" style="color: #333;">bndr_set</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span></span>
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<td class="diff-line-num new_line old" data-linenumber="1313" 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="LC1244" 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="n" style="color: #333;">details</span> <span class="p">(</span><span class="n" style="color: #333;">varUnique</span> <span class="n" style="color: #333;">bndr</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">nonDetKeysUniqSet</span> <span class="n" style="color: #333;">node_fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1313" 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;">details</span></span>
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<td class="diff-line-num new old_line" data-linenumber="1245" 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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<pre style="margin: 0;">+<span id="LC1314" 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;">bndr</span></span>
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<pre style="margin: 0;">+<span id="LC1315" 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;">node_fvs</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC1316" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetKeysUniqSet here as stronglyConnCompFromEdgedVerticesR</span></span>
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<pre style="margin: 0;"> <span id="LC1317" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- is still deterministic with edges in nondeterministic order as</span></span>
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<pre style="margin: 0;"> <span id="LC1318" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- explained in Note [Deterministic SCC] in GHC.Data.Graph.Directed.</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">@@ -1249,7 +1320,7 @@ makeNode env imp_rule_edges bndr_set (bndr, rhs)</td>
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<pre style="margin: 0;"> <span id="LC1320" class="line" lang="haskell">    <span class="n" style="color: #333;">details</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;">bndr'</span></span>
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<pre style="margin: 0;"> <span id="LC1321" class="line" lang="haskell">                 <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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<pre style="margin: 0;"> <span id="LC1322" class="line" lang="haskell">                 <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;">bndrs'</span></span>
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<pre style="margin: 0;">-<span id="LC1252" 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 class="idiff left right">3</span></span></span>
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<pre style="margin: 0;">+<span id="LC1323" 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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1324
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<pre style="margin: 0;"> <span id="LC1324" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1254" 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">
1254
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<td class="diff-line-num new_line" data-linenumber="1325" 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">
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;">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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1255" 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">
1255
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<td class="diff-line-num new_line" data-linenumber="1326" 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">
1326
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<pre style="margin: 0;"> <span id="LC1326" 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>
</pre>
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<td class="diff-line-num unfold js-unfold old_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">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1329" 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">@@ -1258,6 +1329,11 @@ makeNode env imp_rule_edges bndr_set (bndr, rhs)</td>
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1258
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<pre style="margin: 0;"> <span id="LC1329" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1259" 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">
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<td class="diff-line-num new_line" data-linenumber="1330" 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">
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<pre style="margin: 0;"> <span id="LC1330" class="line" lang="haskell">                 <span class="p">`</span><span class="n" style="color: #333;">setIdSpecialisation</span><span class="p">`</span> <span class="n" style="color: #333;">mkRuleInfo</span> <span class="n" style="color: #333;">rules'</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1260" 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">
1260
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<td class="diff-line-num new_line" data-linenumber="1331" 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">
1331
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<pre style="margin: 0;"> <span id="LC1331" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1261" 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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<pre style="margin: 0;">+<span id="LC1332" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs_usage</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;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">unf_uds</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">rule_uds</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1261" 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="1333" 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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<pre style="margin: 0;">+<span id="LC1333" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- Note [Rules are extra RHSs]</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1261" 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="1334" 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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<pre style="margin: 0;">+<span id="LC1334" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- Note [Rule dependency info]</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1261" 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="1335" 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">
1335
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<pre style="margin: 0;">+<span id="LC1335" class="line" lang="haskell">    <span class="n" style="color: #333;">node_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;">rhs_usage</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1261" 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="1336" 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">
1336
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<pre style="margin: 0;">+<span id="LC1336" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1261" 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">
1261
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<td class="diff-line-num new_line" data-linenumber="1337" 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">
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<pre style="margin: 0;"> <span id="LC1337" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Get join point info from the *current* decision</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1262" 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">
1262
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<td class="diff-line-num new_line" data-linenumber="1338" 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">
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<pre style="margin: 0;"> <span id="LC1338" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- We don't know what the new decision will be!</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1263" 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">
1263
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<td class="diff-line-num new_line" data-linenumber="1339" 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">
1339
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<pre style="margin: 0;"> <span id="LC1339" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Using the old decision at least allows us to</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1265" 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="1341" 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">@@ -1265,66 +1341,68 @@ makeNode env imp_rule_edges bndr_set (bndr, rhs)</td>
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<td class="diff-line-num new_line" data-linenumber="1341" 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">
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<pre style="margin: 0;"> <span id="LC1341" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Join points and unfoldings/rules]</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1266" 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">
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<td class="diff-line-num new_line" data-linenumber="1342" 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">
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<pre style="margin: 0;"> <span id="LC1342" class="line" lang="haskell">    <span class="n" style="color: #333;">mb_join_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isJoinId_maybe</span> <span class="n" style="color: #333;">bndr</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1267" 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">
1267
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1343
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<pre style="margin: 0;"> <span id="LC1343" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1268" 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="1344" 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">
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;">--------- Right hand side ---------</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1268" 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">
1268
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<td class="diff-line-num new_line" data-linenumber="1345" 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">
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;">-- Constructing the edges for the main Rec computation</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1269" 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">
1269
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<td class="diff-line-num new_line" data-linenumber="1346" 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">
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;">-- See Note [Forming Rec groups]</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1270" 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">
1270
</td>
<td class="diff-line-num new_line old" data-linenumber="1347" 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="LC1270" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">body</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">collectBinders</span> <span class="n" style="color: #333;">rhs</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1271" 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">
1271
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<td class="diff-line-num new_line old" data-linenumber="1347" 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="LC1271" 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;">rhsCtxt</span> <span class="n" style="color: #333;">env</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1272" 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">
1272
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<td class="diff-line-num new_line old" data-linenumber="1347" 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="LC1272" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">rhs_usage1</span><span class="p">,</span> <span class="n" style="color: #333;">bndrs'</span><span class="p">,</span> <span class="n" style="color: #333;">body'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalLamOrRhs</span> <span class="n" style="color: #333;">rhs_env</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">body</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1273" 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">
1273
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<td class="diff-line-num new_line old" data-linenumber="1347" 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="LC1273" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs'</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkLams</span> <span class="n" style="color: #333;">bndrs'</span> <span class="n" style="color: #333;">body'</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1274" 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">
1274
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<td class="diff-line-num new_line old" data-linenumber="1347" 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="LC1274" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs_usage3</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">andUDs</span> <span class="n" style="color: #333;">rhs_usage1</span> <span class="n" style="color: #333;">rule_uds</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1275" 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">
1275
</td>
<td class="diff-line-num new_line old" data-linenumber="1347" 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="LC1275" class="line" lang="haskell">                 <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">unf_uds</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1276" 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">
1276
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<td class="diff-line-num new_line old" data-linenumber="1347" 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="LC1276" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- Note [Rules are extra RHSs]</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1277" 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">
1277
</td>
<td class="diff-line-num new_line old" data-linenumber="1347" 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="LC1277" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- Note [Rule dependency info]</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1278" 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">
1278
</td>
<td class="diff-line-num new_line old" data-linenumber="1347" 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="LC1278" class="line" lang="haskell">    <span class="n" style="color: #333;">node_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;">rhs_usage3</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1347" 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">
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;">-- Do not use occAnalRhs because we don't yet know</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1348" 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">
1348
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<pre style="margin: 0;">+<span id="LC1348" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- the final answer for mb_join_arity</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1349" 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">
1349
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<pre style="margin: 0;">+<span id="LC1349" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">body</span><span class="p">)</span>            <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">collectBinders</span> <span class="n" style="color: #333;">rhs</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1350" 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">
1350
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<pre style="margin: 0;">+<span id="LC1350" 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;">rhsCtxt</span> <span class="n" style="color: #333;">env</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1351" 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">
1351
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<pre style="margin: 0;">+<span id="LC1351" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">rhs_uds</span><span class="p">,</span> <span class="n" style="color: #333;">bndrs'</span><span class="p">,</span> <span class="n" style="color: #333;">body'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalLamOrRhs</span> <span class="n" style="color: #333;">rhs_env</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">body</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1352" 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">
1352
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<pre style="margin: 0;">+<span id="LC1352" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs'</span>                     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkLams</span> <span class="n" style="color: #333;">bndrs'</span> <span class="n" style="color: #333;">body'</span></span>
</pre>
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</td>
<td class="diff-line-num new new_line" data-linenumber="1353" 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">
1353
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<pre style="margin: 0;">+<span id="LC1353" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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="1354" 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">
1354
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<pre style="margin: 0;">+<span id="LC1354" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--------- Unfolding ---------</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1355" 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">
1355
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<pre style="margin: 0;">+<span id="LC1355" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Unfoldings and join points]</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1356" 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">
1356
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<pre style="margin: 0;">+<span id="LC1356" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1357" 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">
1357
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<pre style="margin: 0;">+<span id="LC1357" class="line" lang="haskell">                               <span class="c1" style="color: #998; font-style: italic;">-- here because that is what we are setting!</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1358" 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">
1358
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<pre style="margin: 0;">+<span id="LC1358" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1359" 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">
1359
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<pre style="margin: 0;">+<span id="LC1359" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1360" 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">
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="n" style="color: #333;">otherwise</span>             <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs_uds</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1361" 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">
1361
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<pre style="margin: 0;">+<span id="LC1361" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1362" 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">
1362
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<pre style="margin: 0;">+<span id="LC1362" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1363" 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">
1363
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<pre style="margin: 0;">+<span id="LC1363" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1364" 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">
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;">-- Note: We could do this only for functions with an *active* unfolding</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1365" 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">
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;">--       (returning emptyVarSet for an inactive one), but is_active</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1366" 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">
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;">--       isn't the right thing (it tells about RULE activation),</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1279" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1367" 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">
1367
</td>
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<pre style="margin: 0;">+<span id="LC1367" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--       so we'd need more plumbing</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1279" 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">
1279
</td>
<td class="diff-line-num new_line" data-linenumber="1368" 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">
1368
</td>
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<pre style="margin: 0;"> <span id="LC1368" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1280" 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">
1280
</td>
<td class="diff-line-num new_line old" data-linenumber="1369" 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="LC1280" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Finding the free variables of the rules</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1281" 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">
1281
</td>
<td class="diff-line-num new_line old" data-linenumber="1369" 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">
 
</td>
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<pre style="margin: 0;">-<span id="LC1281" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1282" 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">
1282
</td>
<td class="diff-line-num new_line" data-linenumber="1369" 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">
1369
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<pre style="margin: 0;"> <span id="LC1369" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1283" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1370" 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">
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;">--------- IMP-RULES --------</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1283" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1371" 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">
1371
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<pre style="margin: 0;">+<span id="LC1371" 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>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1283" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1372" 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">
1372
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<pre style="margin: 0;">+<span id="LC1372" class="line" lang="haskell">    <span class="n" style="color: #333;">imp_rule_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lookupImpRules</span> <span class="n" style="color: #333;">imp_rule_edges</span> <span class="n" style="color: #333;">bndr</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1283" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1373" 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">
1373
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1373" class="line" lang="haskell">    <span class="n" style="color: #333;">imp_rule_uds</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">impRulesScopeUsage</span> <span class="n" style="color: #333;">imp_rule_info</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1283" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1374" 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">
1374
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<pre style="margin: 0;">+<span id="LC1374" 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;">impRulesActiveFvs</span> <span class="n" style="color: #333;">is_active</span> <span class="n" style="color: #333;">bndr_set</span> <span class="n" style="color: #333;">imp_rule_info</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1283" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1375" 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">
1375
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1375" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
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<td class="diff-line-num new old_line" data-linenumber="1283" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1376" 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">
1376
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<pre style="margin: 0;">+<span id="LC1376" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--------- All rules --------</span></span>
</pre>
</td>
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<tr class="line_holder" id="" style="line-height: 1.6;">
<td class="diff-line-num old_line" data-linenumber="1283" 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">
1283
</td>
<td class="diff-line-num new_line" data-linenumber="1377" 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">
1377
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<pre style="margin: 0;"> <span id="LC1377" 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>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1284" 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">
1284
</td>
<td class="diff-line-num new_line" data-linenumber="1378" 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">
1378
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<pre style="margin: 0;"> <span id="LC1378" class="line" lang="haskell">    <span class="n" style="color: #333;">rules_w_uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalRules</span> <span class="n" style="color: #333;">rhs_env</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">bndr</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1285" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1379" 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">
1379
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<pre style="margin: 0;">+<span id="LC1379" class="line" lang="haskell">    <span class="n" style="color: #333;">rules'</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">fstOf3</span> <span class="n" style="color: #333;">rules_w_uds</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1285" 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">
1285
</td>
<td class="diff-line-num new_line" data-linenumber="1380" 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">
1380
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1380" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1286" 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">
1286
</td>
<td class="diff-line-num new_line old" data-linenumber="1381" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1286" class="line" lang="haskell">    <span class="n" style="color: #333;">rules'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">fstOf3</span> <span class="n" style="color: #333;">rules_w_uds</span></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1287" 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">
1287
</td>
<td class="diff-line-num new_line old" data-linenumber="1381" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1287" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1288" 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">
1288
</td>
<td class="diff-line-num new_line old" data-linenumber="1381" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1288" class="line" lang="haskell">    <span class="n" style="color: #333;">rules_w_rhs_fvs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Activation</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span><span class="p">)]</span>    <span class="c1" style="color: #998; font-style: italic;">-- Find the RHS fvs</span></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1289" 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">
1289
</td>
<td class="diff-line-num new_line old" data-linenumber="1381" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1289" class="line" lang="haskell">    <span class="n" style="color: #333;">rules_w_rhs_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybe</span> <span class="n" style="color: #333;">id</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ids</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">((</span><span class="kt" style="color: #458; font-weight: 600;">AlwaysActive</span><span class="p">,</span> <span class="n" style="color: #333;">ids</span><span class="p">)</span><span class="o" style="font-weight: 600;">:</span><span class="p">))</span></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1290" 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">
1290
</td>
<td class="diff-line-num new_line old" data-linenumber="1381" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1290" class="line" lang="haskell">                               <span class="p">(</span><span class="n" style="color: #333;">lookupVarEnv</span> <span class="n" style="color: #333;">imp_rule_edges</span> <span class="n" style="color: #333;">bndr</span><span class="p">)</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1291" 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">
1291
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<td class="diff-line-num new_line old" data-linenumber="1381" 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="LC1291" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- See Note [Preventing loops due to imported functions rules]</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1292" 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">
1292
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<td class="diff-line-num new_line old" data-linenumber="1381" 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="LC1292" class="line" lang="haskell">                      <span class="p">[</span> <span class="p">(</span><span class="n" style="color: #333;">ru_act</span> <span class="n" style="color: #333;">rule</span><span class="p">,</span> <span class="n" style="color: #333;">udFreeVars</span> <span class="n" style="color: #333;">bndr_set</span> <span class="n" style="color: #333;">rhs_uds</span><span class="p">)</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1293" 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">
1293
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<td class="diff-line-num new_line old" data-linenumber="1381" 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="LC1293" class="line" lang="haskell">                      <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">rule</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_uds</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rules_w_uds</span> <span class="p">]</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1294" 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">
1294
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<td class="diff-line-num new_line old" data-linenumber="1381" 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="LC1294" class="line" lang="haskell">    <span class="n" style="color: #333;">rule_uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">l</span><span class="p">,</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">l</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="n" style="color: #333;">rules_w_uds</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1295" 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">
1295
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<td class="diff-line-num new_line old" data-linenumber="1381" 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="LC1295" class="line" lang="haskell">    <span class="n" style="color: #333;">active_rule_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unionVarSets</span> <span class="p">[</span><span class="n" style="color: #333;">fvs</span> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="p">,</span><span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rules_w_rhs_fvs</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1296" 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">
1296
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<td class="diff-line-num new_line old" data-linenumber="1381" 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="LC1296" class="line" lang="haskell">                                        <span class="p">,</span> <span class="n" style="color: #333;">is_active</span> <span class="n" style="color: #333;">a</span><span class="p">]</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1297" 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="1381" 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">
1381
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<pre style="margin: 0;">+<span id="LC1381" class="line" lang="haskell">    <span class="n" style="color: #333;">rule_uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">add_rule_uds</span> <span class="n" style="color: #333;">imp_rule_uds</span> <span class="n" style="color: #333;">rules_w_uds</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1297" 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="1382" 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">
1382
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<pre style="margin: 0;">+<span id="LC1382" class="line" lang="haskell">    <span class="n" style="color: #333;">add_rule_uds</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">l</span><span class="p">,</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="n" style="color: #333;">uds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">l</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">r</span> <span class="p">`</span><span class="n" style="color: #333;">andUDs</span><span class="p">`</span> <span class="n" style="color: #333;">uds</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1297" 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">
1297
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<td class="diff-line-num new_line" data-linenumber="1383" 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">
1383
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<pre style="margin: 0;"> <span id="LC1383" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1298" 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">
1298
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<td class="diff-line-num new_line old" data-linenumber="1384" 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="LC1298" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Finding the usage details of the INLINE pragma (if any)</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1299" 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">
1299
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<td class="diff-line-num new_line old" data-linenumber="1384" 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="LC1299" 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>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1300" 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">
1300
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<td class="diff-line-num new_line old" data-linenumber="1384" 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="LC1300" class="line" lang="haskell">                               <span class="c1" style="color: #998; font-style: italic;">-- here because that is what we are setting!</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1301" 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">
1301
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<td class="diff-line-num new_line old" data-linenumber="1384" 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="LC1301" 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="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">unf</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1302" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1384" 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">
1384
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<pre style="margin: 0;">+<span id="LC1384" class="line" lang="haskell">    <span class="n" style="color: #333;">active_rule_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">add_active_rule</span> <span class="n" style="color: #333;">imp_rule_fvs</span> <span class="n" style="color: #333;">rules_w_uds</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1302" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1385" 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">
1385
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<pre style="margin: 0;">+<span id="LC1385" class="line" lang="haskell">    <span class="n" style="color: #333;">add_active_rule</span> <span class="p">(</span><span class="n" style="color: #333;">rule</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_uds</span><span class="p">)</span> <span class="n" style="color: #333;">fvs</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1302" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1386" 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">
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;">is_active</span> <span class="p">(</span><span class="n" style="color: #333;">ruleActivation</span> <span class="n" style="color: #333;">rule</span><span class="p">)</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1302" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1387" 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">
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;">udFreeVars</span> <span class="n" style="color: #333;">bndr_set</span> <span class="n" style="color: #333;">rhs_uds</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">fvs</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1302" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1388" 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">
1388
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<pre style="margin: 0;">+<span id="LC1388" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1302" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1389" 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">
1389
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<pre style="margin: 0;">+<span id="LC1389" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fvs</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1302" 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">
1302
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<td class="diff-line-num new_line" data-linenumber="1390" 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">
1390
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<pre style="margin: 0;"> <span id="LC1390" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1303" 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">
1303
</td>
<td class="diff-line-num new_line old" data-linenumber="1391" 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="LC1303" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Find the "nd_inl" free vars; for the loop-breaker phase</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1304" 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">
1304
</td>
<td class="diff-line-num new_line old" data-linenumber="1391" 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="LC1304" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- These are the vars that would become free if the function</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1305" 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">
1305
</td>
<td class="diff-line-num new_line old" data-linenumber="1391" 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">
 
</td>
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<pre style="margin: 0;">-<span id="LC1305" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- was inlinined; usually that means the RHS, unless the</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1306" 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">
1306
</td>
<td class="diff-line-num new_line old" data-linenumber="1391" 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="LC1306" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- unfolding is a stable one.</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1307" 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">
1307
</td>
<td class="diff-line-num new_line old" data-linenumber="1391" 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="LC1307" 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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1308" 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">
1308
</td>
<td class="diff-line-num new_line old" data-linenumber="1391" 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="LC1308" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--       (returning emptyVarSet for an inactive one), but is_active</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1309" 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">
1309
</td>
<td class="diff-line-num new_line old" data-linenumber="1391" 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">
 
</td>
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<pre style="margin: 0;">-<span id="LC1309" 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>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1310" 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">
1310
</td>
<td class="diff-line-num new_line old" data-linenumber="1391" 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">
 
</td>
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<pre style="margin: 0;">-<span id="LC1310" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--       so we'd need more plumbing</span></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="1311" 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">
1311
</td>
<td class="diff-line-num new_line old" data-linenumber="1391" 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="LC1311" 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;">isStableUnfolding</span> <span class="n" style="color: #333;">unf</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;">unf_uds</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1312" 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">
1312
</td>
<td class="diff-line-num new_line old" data-linenumber="1391" 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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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1312" 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;">udFreeVars</span> <span class="n" style="color: #333;">bndr_set</span> <span class="n" style="color: #333;">rhs_usage1</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1313" 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">
1313
</td>
<td class="diff-line-num new_line" data-linenumber="1391" 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">
1391
</td>
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<pre style="margin: 0;"> <span id="LC1391" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1314" 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">
1314
</td>
<td class="diff-line-num new_line" data-linenumber="1392" 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">
1392
</td>
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<pre style="margin: 0;"> <span id="LC1392" 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>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1315" 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">
1315
</td>
<td class="diff-line-num new_line old" data-linenumber="1393" 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">
 
</td>
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<pre style="margin: 0;">-<span id="LC1315" class="line" lang="haskell">                   <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span></span>
</pre>
</td>
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<tr class="line_holder" id="" style="line-height: 1.6;">
<td class="diff-line-num old_line" data-linenumber="1316" 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">
1316
</td>
<td class="diff-line-num new_line" data-linenumber="1393" 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">
1393
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<pre style="margin: 0;"> <span id="LC1393" 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>
</pre>
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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="1394" 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">
1394
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<pre style="margin: 0;"> <span id="LC1394" 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>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1318" 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">
1318
</td>
<td class="diff-line-num new_line" data-linenumber="1395" 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">
1395
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<pre style="margin: 0;"> <span id="LC1395" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1319" 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">
1319
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<td class="diff-line-num new_line" data-linenumber="1396" 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">
1396
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<pre style="margin: 0;"> <span id="LC1396" class="line" lang="haskell">                       <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LetrecNode</span><span class="p">])</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1320" 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">
1320
</td>
<td class="diff-line-num new_line old" data-linenumber="1397" 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="LC1320" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Does four things</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1321" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1397" 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">
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;">-- This function primarily creates the Nodes for the</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1321" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1398" 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">
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;">-- loop-breaker SCC analysis.  More specifically:</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1321" 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">
1321
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<td class="diff-line-num new_line" data-linenumber="1399" 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">
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;">--   a) tag each binder with its occurrence info</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1322" 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">
1322
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<td class="diff-line-num new_line" data-linenumber="1400" 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">
1400
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<pre style="margin: 0;"> <span id="LC1400" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   b) add a NodeScore to each node</span></span>
</pre>
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<td class="diff-line-num old_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">
1323
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<td class="diff-line-num new_line" data-linenumber="1401" 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">
1401
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<pre style="margin: 0;"> <span id="LC1401" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1324" 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">
1324
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<td class="diff-line-num new_line" data-linenumber="1402" 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">
1402
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<pre style="margin: 0;"> <span id="LC1402" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      the loop-breaker SCC analysis</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1325" 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">
1325
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<td class="diff-line-num new_line" data-linenumber="1403" 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">
1403
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<pre style="margin: 0;"> <span id="LC1403" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   d) adjust each RHS's usage details according to</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1326" 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">
1326
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<td class="diff-line-num new_line" data-linenumber="1404" 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">
1404
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<pre style="margin: 0;"> <span id="LC1404" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      the binder's (new) shotness and join-point-hood</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1327" 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">
1327
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<td class="diff-line-num new_line old" data-linenumber="1405" 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="LC1327" 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;">b<span class="idiff left">ndr_set</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">b</span>ody_uds</span> <span class="n" style="color: #333;">details_s</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1328" 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="1405" 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">
1405
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<pre style="margin: 0;">+<span id="LC1405" 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>
</pre>
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<td class="diff-line-num old_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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<td class="diff-line-num new_line" data-linenumber="1406" 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">
1406
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<pre style="margin: 0;"> <span id="LC1406" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1329" 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">
1329
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<td class="diff-line-num new_line" data-linenumber="1407" 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">
1407
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<pre style="margin: 0;"> <span id="LC1407" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1330" 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">
1330
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<td class="diff-line-num new_line" data-linenumber="1408" 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">
1408
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<pre style="margin: 0;"> <span id="LC1408" 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>
</pre>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1412" 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">@@ -1334,28 +1412,46 @@ mkLoopBreakerNodes env lvl bndr_set body_uds details_s</td>
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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="n" style="color: #333;">details_s</span> <span class="p">]</span></span>
</pre>
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<td class="diff-line-num old_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">
1335
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<td class="diff-line-num new_line" data-linenumber="1413" 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">
1413
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<pre style="margin: 0;"> <span id="LC1413" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1336" 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">
1336
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<td class="diff-line-num new_line" data-linenumber="1414" 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">
1414
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<pre style="margin: 0;"> <span id="LC1414" 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>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1337" 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">
1337
</td>
<td class="diff-line-num new_line old" data-linenumber="1415" 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="LC1337" 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="n" style="color: #333;">nd'</span> <span class="p">(</span><span class="n" style="color: #333;">varUnique</span> <span class="n" style="color: #333;">old_bndr</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">nonDetKeysUniqSet</span> <span class="n" style="color: #333;">lb_deps</span><span class="p">)</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1338" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1415" 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">
1415
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<pre style="margin: 0;">+<span id="LC1415" 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;">new_nd</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1338" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1416" 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">
1416
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<pre style="margin: 0;">+<span id="LC1416" 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>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1338" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1417" 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">
1417
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<pre style="margin: 0;">+<span id="LC1417" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1338" 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">
1338
</td>
<td class="diff-line-num new_line" data-linenumber="1418" 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">
1418
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<pre style="margin: 0;"> <span id="LC1418" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- It's OK to use nonDetKeysUniqSet here as</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1339" 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">
1339
</td>
<td class="diff-line-num new_line" data-linenumber="1419" 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">
1419
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<pre style="margin: 0;"> <span id="LC1419" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- stronglyConnCompFromEdgedVerticesR is still deterministic with edges</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1340" 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">
1340
</td>
<td class="diff-line-num new_line" data-linenumber="1420" 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">
1420
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<pre style="margin: 0;"> <span id="LC1420" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- in nondeterministic order as explained in</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1341" 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">
1341
</td>
<td class="diff-line-num new_line" data-linenumber="1421" 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">
1421
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<pre style="margin: 0;"> <span id="LC1421" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- Note [Deterministic SCC] in GHC.Data.Graph.Directed.</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1342" 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">
1342
</td>
<td class="diff-line-num new_line" data-linenumber="1422" 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">
1422
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<pre style="margin: 0;"> <span id="LC1422" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1343" 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">
1343
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<td class="diff-line-num new_line old" data-linenumber="1423" 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="LC1343" 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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1344" 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">
1344
</td>
<td class="diff-line-num new_line old" data-linenumber="1423" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1344" 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>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1345" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1423" 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">
1423
</td>
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<pre style="margin: 0;">+<span id="LC1423" 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>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1345" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1424" 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">
1424
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1424" 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>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1345" 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">
1345
</td>
<td class="diff-line-num new_line" data-linenumber="1425" 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">
1425
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<pre style="margin: 0;"> <span id="LC1425" 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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1346" 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">
1346
</td>
<td class="diff-line-num new_line old" data-linenumber="1426" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1346" class="line" lang="haskell"></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1347" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1426" 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">
1426
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1426" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- See Note [Loop breaker dependencies]</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1347" 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">
1347
</td>
<td class="diff-line-num new_line" data-linenumber="1427" 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">
1427
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1427" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num 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">
1348
</td>
<td class="diff-line-num new_line" data-linenumber="1428" 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">
1428
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<pre style="margin: 0;"> <span id="LC1428" 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>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1349" 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">
1349
</td>
<td class="diff-line-num new_line old" data-linenumber="1429" 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="LC1349" 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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1350" 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">
1350
</td>
<td class="diff-line-num new_line old" data-linenumber="1429" 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">
 
</td>
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<pre style="margin: 0;">-<span id="LC1350" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--      mentioned in RHS of active rules for f</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1351" 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">
1351
</td>
<td class="diff-line-num new_line old" data-linenumber="1429" 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="LC1351" 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>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1352" 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">
1352
</td>
<td class="diff-line-num new_line old" data-linenumber="1429" 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="LC1352" 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="p">(</span><span class="n" style="color: #333;">mkVarEnv</span> <span class="n" style="color: #333;">init_rule_fvs</span><span class="p">)</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1353" 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">
1353
</td>
<td class="diff-line-num new_line old" data-linenumber="1429" 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="LC1353" class="line" lang="haskell">    <span class="n" style="color: #333;">init_rule_fvs</span>   <span class="c1" style="color: #998; font-style: italic;">-- See Note [Finding rule RHS free vars]</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1354" 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">
1354
</td>
<td class="diff-line-num new_line old" data-linenumber="1429" 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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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1354" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</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;">trimmed_rule_fvs</span><span class="p">)</span></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1355" 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">
1355
</td>
<td class="diff-line-num new_line old" data-linenumber="1429" 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="LC1355" 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>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1356" 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">
1356
</td>
<td class="diff-line-num new_line old" data-linenumber="1429" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1356" class="line" lang="haskell">        <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">trimmed_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="n" style="color: #333;">intersectVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">bndr_set</span></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="1357" 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">
1357
</td>
<td class="diff-line-num new_line old" data-linenumber="1429" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1357" 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;">trimmed_rule_fvs</span><span class="p">)</span> <span class="p">]</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1429" 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">
1429
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1429" 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>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1430" 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">
1430
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1430" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--      reachable by a sequence of RULES starting with f</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1431" 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">
1431
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1431" 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>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1432" 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">
1432
</td>
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<pre style="margin: 0;">+<span id="LC1432" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Finding rule RHS free vars]</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1433" 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">
1433
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1433" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Why transClosureFV?  See Note [Loop breaker dependencies]</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1434" 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">
1434
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<pre style="margin: 0;">+<span id="LC1434" 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>
</pre>
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</td>
<td class="diff-line-num new new_line" data-linenumber="1435" 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">
1435
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<pre style="margin: 0;">+<span id="LC1435" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1358" 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="1436" 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">
1436
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<pre style="margin: 0;">+<span id="LC1436" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1437" 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">
1437
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<pre style="margin: 0;">+<span id="LC1437" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1438" 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">
1438
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<pre style="margin: 0;">+<span id="LC1438" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1439" 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">
1439
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<pre style="margin: 0;">+<span id="LC1439" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Loop breaker dependencies]</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1440" 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">
1440
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<pre style="margin: 0;">+<span id="LC1440" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1441" 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">
1441
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<pre style="margin: 0;">+<span id="LC1441" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The loop breaker dependencies of x in a recursive</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1358" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1442" 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">
1442
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<pre style="margin: 0;">+<span id="LC1442" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">group { f1 = e1; ...; fn = en } are:</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1358" 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">
1358
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<td class="diff-line-num new_line" data-linenumber="1443" 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">
1443
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<pre style="margin: 0;"> <span id="LC1443" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1359" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1444" 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">
1444
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<pre style="margin: 0;">+<span id="LC1444" 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>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1359" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1445" 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">
1445
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<pre style="margin: 0;">+<span id="LC1445" 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>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1359" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1446" 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">
1446
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<pre style="margin: 0;">+<span id="LC1446" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  of     f's RHS       (if not)</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1359" 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="1447" 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">
1447
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1447" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1359" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1448" 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">
1448
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<pre style="margin: 0;">+<span id="LC1448" 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>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1359" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1449" 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">
1449
</td>
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<pre style="margin: 0;">+<span id="LC1449" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  of RULE rewrites.  Remember, rule rewriting is not affected</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1359" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1450" 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">
1450
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<pre style="margin: 0;">+<span id="LC1450" 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>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1359" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1451" 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">
1451
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<pre style="margin: 0;">+<span id="LC1451" 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>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1359" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1452" 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">
1452
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1452" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1359" 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="1453" 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">
1453
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<pre style="margin: 0;">+<span id="LC1453" 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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<pre style="margin: 0;">+<span id="LC1454" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC1455" class="line" lang="haskell"></span>
</pre>
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1456
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<pre style="margin: 0;"> <span id="LC1456" 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="LC1457" 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>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1567" 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="1663" 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">@@ -1567,29 +1663,31 @@ Hence the is_lb field of NodeScore</td>
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<pre style="margin: 0;"> <span id="LC1663" 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="LC1664" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC1665" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1570" 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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<td class="diff-line-num new_line old" data-linenumber="1666" 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="LC1570" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRhs</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;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">JoinArity</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC1666" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRhs</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;"><span class="idiff left">RecFlag</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff right"> </span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">JoinArity</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC1667" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span>   <span class="c1" style="color: #998; font-style: italic;">-- RHS</span></span>
</pre>
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1572
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<td class="diff-line-num new_line" data-linenumber="1668" 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">
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<pre style="margin: 0;"> <span id="LC1668" 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="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="1669" 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="LC1573" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRhs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">rhs</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC1669" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalRhs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;"><span class="idiff left">is_rec</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">rhs</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC1670" 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;">occAnalLamOrRhs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">body</span> <span class="kr" style="font-weight: 600;">of</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">body_usage</span><span class="p">,</span> <span class="n" style="color: #333;">bndrs'</span><span class="p">,</span> <span class="n" style="color: #333;">body'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="1671" 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="LC1575" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">rhs'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkLams</span> <span class="p">(</span><span class="n" style="color: #333;">markJoinOneShots</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">bndrs'</span><span class="p">)</span> <span class="n" style="color: #333;">body'</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC1671" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">final_bndrs</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isRec</span> <span class="n" style="color: #333;">is_rec</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bndrs'</span></span>
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<td class="diff-line-num new old_line" data-linenumber="1576" 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="1672" 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">
1672
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<pre style="margin: 0;">+<span id="LC1672" 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;">markJoinOneShots</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">bndrs'</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1576" 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">
1576
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<td class="diff-line-num new_line" data-linenumber="1673" 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">
1673
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<pre style="margin: 0;"> <span id="LC1673" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- For a /non-recursive/ join point we can mark all</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1577" 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">
1577
</td>
<td class="diff-line-num new_line" data-linenumber="1674" 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">
1674
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<pre style="margin: 0;"> <span id="LC1674" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- its join-lambda as one-shot; and it's a good idea to do so</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1578" 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">
1578
</td>
<td class="diff-line-num new_line" data-linenumber="1675" 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">
1675
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1675" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1579" 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">
1579
</td>
<td class="diff-line-num new_line" data-linenumber="1676" 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">
1676
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<pre style="margin: 0;"> <span id="LC1676" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Final adjustment</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="1580" 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">
1580
</td>
<td class="diff-line-num new_line old" data-linenumber="1677" 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="LC1580" class="line" lang="haskell">        <span class="n" style="color: #333;">rhs_usage</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">adjustRhsUsage</span> <span class="n" style="color: #333;"><span class="idiff left">mb_join_arity</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">NonRecursive</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">bndrs'</span></span> <span class="n" style="color: #333;">body_usage</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1581" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1677" 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">
1677
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<pre style="margin: 0;">+<span id="LC1677" class="line" lang="haskell">        <span class="n" style="color: #333;">rhs_usage</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">adjustRhsUsage</span> <span class="n" style="color: #333;"><span class="idiff left">is_rec</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mb_join_arity</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">final_bndrs</span></span> <span class="n" style="color: #333;">body_usage</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1581" 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">
1581
</td>
<td class="diff-line-num new_line" data-linenumber="1678" 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">
1678
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1678" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old old_line" data-linenumber="1582" 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">
1582
</td>
<td class="diff-line-num new_line old" data-linenumber="1679" 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">
 
</td>
<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC1582" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">in</span> <span class="p">(</span><span class="n" style="color: #333;">rhs_usage</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left right">rhs</span>'</span><span class="p">)</span> <span class="p">}</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="1583" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1679" 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">
1679
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<pre style="margin: 0;">+<span id="LC1679" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">in</span> <span class="p">(</span><span class="n" style="color: #333;">rhs_usage</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left">mkLams</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">final_bndrs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">body</span>'</span><span class="p">)</span> <span class="p">}</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1583" 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">
1583
</td>
<td class="diff-line-num new_line" data-linenumber="1680" 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">
1680
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1680" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1584" 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">
1584
</td>
<td class="diff-line-num new_line" data-linenumber="1681" 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">
1681
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1681" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">body</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">collectBinders</span> <span class="n" style="color: #333;">rhs</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1585" 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">
1585
</td>
<td class="diff-line-num new_line" data-linenumber="1682" 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">
1682
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1682" class="line" lang="haskell"></span>
</pre>
</td>
</tr>
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<td class="diff-line-num old_line" data-linenumber="1586" 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">
1586
</td>
<td class="diff-line-num new_line" data-linenumber="1683" 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">
1683
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1683" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalUnfolding</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccEnv</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="1587" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1684" 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">
1684
</td>
<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC1684" class="line" lang="haskell">                 <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RecFlag</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1587" 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">
1587
</td>
<td class="diff-line-num new_line" data-linenumber="1685" 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">
1685
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1685" class="line" lang="haskell">                 <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">JoinArity</span>   <span class="c1" style="color: #998; font-style: italic;">-- See Note [Join points and unfoldings/rules]</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1588" 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">
1588
</td>
<td class="diff-line-num new_line" data-linenumber="1686" 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">
1686
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1686" class="line" lang="haskell">                 <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Unfolding</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1589" 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">
1589
</td>
<td class="diff-line-num new_line" data-linenumber="1687" 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">
1687
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC1687" 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="kt" style="color: #458; font-weight: 600;">Unfolding</span><span class="p">)</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="1590" 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">
1590
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<td class="diff-line-num new_line" data-linenumber="1688" 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">
1688
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<pre style="margin: 0;"> <span id="LC1688" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Occurrence-analyse a stable unfolding;</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1591" 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">
1591
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<td class="diff-line-num new_line" data-linenumber="1689" 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">
1689
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<pre style="margin: 0;"> <span id="LC1689" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- discard a non-stable one altogether.</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1592" 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">
1592
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<td class="diff-line-num new_line old" data-linenumber="1690" 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="LC1592" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalUnfolding</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">unf</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1593" 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="1690" 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">
1690
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<pre style="margin: 0;">+<span id="LC1690" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalUnfolding</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;"><span class="idiff left">is_rec</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">unf</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1593" 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">
1593
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<td class="diff-line-num new_line" data-linenumber="1691" 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">
1691
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<pre style="margin: 0;"> <span id="LC1691" 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;">unf</span> <span class="kr" style="font-weight: 600;">of</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1594" 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">
1594
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<td class="diff-line-num new_line" data-linenumber="1692" 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">
1692
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<pre style="margin: 0;"> <span id="LC1692" class="line" lang="haskell">      <span class="n" style="color: #333;">unf</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreUnfolding</span> <span class="p">{</span> <span class="n" style="color: #333;">uf_tmpl</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;">uf_src</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">src</span> <span class="p">})</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1595" 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">
1595
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<td class="diff-line-num new_line" data-linenumber="1693" 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">
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<pre style="margin: 0;"> <span id="LC1693" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isStableSource</span> <span class="n" style="color: #333;">src</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">usage</span><span class="p">,</span>        <span class="n" style="color: #333;">unf'</span><span class="p">)</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1600" 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="1698" 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">@@ -1600,7 +1698,7 @@ occAnalUnfolding env mb_join_arity unf</td>
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<pre style="margin: 0;"> <span id="LC1698" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- to guide its decisions.  It's ok to leave un-substituted</span></span>
</pre>
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<td class="diff-line-num new_line" data-linenumber="1699" 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">
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<pre style="margin: 0;"> <span id="LC1699" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- expressions in the tree because all the variables that were in</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1602" 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">
1602
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<td class="diff-line-num new_line" data-linenumber="1700" 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">
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<pre style="margin: 0;"> <span id="LC1700" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- scope remain in scope; there is no cloning etc.</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1603" 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">
1603
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<td class="diff-line-num new_line old" data-linenumber="1701" 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="LC1603" class="line" lang="haskell">          <span class="p">(</span><span class="n" style="color: #333;">usage</span><span class="p">,</span> <span class="n" style="color: #333;">rhs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalRhs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">rhs</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1604" 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="1701" 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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<pre style="margin: 0;">+<span id="LC1701" class="line" lang="haskell">          <span class="p">(</span><span class="n" style="color: #333;">usage</span><span class="p">,</span> <span class="n" style="color: #333;">rhs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalRhs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;"><span class="idiff left">is_rec</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">rhs</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1604" 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">
1604
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<td class="diff-line-num new_line" data-linenumber="1702" 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">
1702
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<pre style="margin: 0;"> <span id="LC1702" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1605" 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">
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<td class="diff-line-num new_line" data-linenumber="1703" 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">
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<pre style="margin: 0;"> <span id="LC1703" 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;">noBinderSwaps</span> <span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unf</span> <span class="c1" style="color: #998; font-style: italic;">-- Note [Unfoldings and rules]</span></span>
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<td class="diff-line-num old_line" data-linenumber="1606" 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">
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<td class="diff-line-num new_line" data-linenumber="1704" 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">
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<pre style="margin: 0;"> <span id="LC1704" 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;">unf</span> <span class="p">{</span> <span class="n" style="color: #333;">uf_tmpl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs'</span> <span class="p">}</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1897" 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="1995" 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">@@ -1897,7 +1995,7 @@ occAnalApp env (Var fun, args, ticks)</td>
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1897
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<pre style="margin: 0;"> <span id="LC1995" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">--     This caused #18296</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1898" 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">
1898
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<td class="diff-line-num new_line" data-linenumber="1996" 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">
1996
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<pre style="margin: 0;"> <span id="LC1996" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">fun</span> <span class="p">`</span><span class="n" style="color: #333;">hasKey</span><span class="p">`</span> <span class="n" style="color: #333;">runRWKey</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1899" 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">
1899
</td>
<td class="diff-line-num new_line" data-linenumber="1997" 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">
1997
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<pre style="margin: 0;"> <span id="LC1997" class="line" lang="haskell">  <span class="p">,</span> <span class="p">[</span><span class="n" style="color: #333;">t1</span><span class="p">,</span> <span class="n" style="color: #333;">t2</span><span class="p">,</span> <span class="n" style="color: #333;">arg</span><span class="p">]</span>  <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">args</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="1900" 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">
1900
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<td class="diff-line-num new_line old" data-linenumber="1998" 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="LC1900" class="line" lang="haskell">  <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">usage</span><span class="p">,</span> <span class="n" style="color: #333;">arg'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalRhs</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="n" style="color: #333;">arg</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="1901" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="1998" 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">
1998
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<pre style="margin: 0;">+<span id="LC1998" class="line" lang="haskell">  <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">usage</span><span class="p">,</span> <span class="n" style="color: #333;">arg'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occAnalRhs</span> <span class="n" style="color: #333;">env</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NonRecursive</span></span><span class="idiff right"> </span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="n" style="color: #333;">arg</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1901" 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">
1901
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<td class="diff-line-num new_line" data-linenumber="1999" 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">
1999
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<pre style="margin: 0;"> <span id="LC1999" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">usage</span><span class="p">,</span> <span class="n" style="color: #333;">mkTicks</span> <span class="n" style="color: #333;">ticks</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkApps</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">fun</span><span class="p">)</span> <span class="p">[</span><span class="n" style="color: #333;">t1</span><span class="p">,</span> <span class="n" style="color: #333;">t2</span><span class="p">,</span> <span class="n" style="color: #333;">arg'</span><span class="p">])</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1902" 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">
1902
</td>
<td class="diff-line-num new_line" data-linenumber="2000" 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">
2000
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<pre style="margin: 0;"> <span id="LC2000" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="1903" 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">
1903
</td>
<td class="diff-line-num new_line" data-linenumber="2001" 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">
2001
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<pre style="margin: 0;"> <span id="LC2001" class="line" lang="haskell"><span class="n" style="color: #333;">occAnalApp</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">fun</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">ticks</span><span class="p">)</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2233" 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="2331" 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">@@ -2233,6 +2331,7 @@ addAppCtxt :: OccEnv -> [Arg CoreBndr] -> OccEnv</td>
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<td class="diff-line-num old_line" data-linenumber="2233" 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">
2233
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<td class="diff-line-num new_line" data-linenumber="2331" 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">
2331
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<pre style="margin: 0;"> <span id="LC2331" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2234" 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">
2234
</td>
<td class="diff-line-num new_line" data-linenumber="2332" 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">
2332
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<pre style="margin: 0;"> <span id="LC2332" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2235" 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">
2235
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<td class="diff-line-num new_line" data-linenumber="2333" 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">
2333
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<pre style="margin: 0;"> <span id="LC2333" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="2236" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="2334" 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">
2334
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<pre style="margin: 0;">+<span id="LC2334" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--------------------</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2236" 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">
2236
</td>
<td class="diff-line-num new_line" data-linenumber="2335" 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">
2335
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<pre style="margin: 0;"> <span id="LC2335" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2237" 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">
2237
</td>
<td class="diff-line-num new_line" data-linenumber="2336" 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">
2336
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<pre style="margin: 0;"> <span id="LC2336" 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>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2238" 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">
2238
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<td class="diff-line-num new_line" data-linenumber="2337" 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">
2337
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<pre style="margin: 0;"> <span id="LC2337" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--                                   as well as (f,g), (g,h)</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2643" 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="2742" 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">@@ -2643,7 +2742,10 @@ v `usedIn` ud = isExportedId v || v `elemVarEnv` ud_env ud</td>
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<td class="diff-line-num old_line" data-linenumber="2643" 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">
2643
</td>
<td class="diff-line-num new_line" data-linenumber="2742" 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">
2742
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC2742" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2644" 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">
2644
</td>
<td class="diff-line-num new_line" data-linenumber="2743" 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">
2743
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<pre style="margin: 0;"> <span id="LC2743" class="line" lang="haskell"><span class="n" style="color: #333;">udFreeVars</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2645" 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">
2645
</td>
<td class="diff-line-num new_line" data-linenumber="2744" 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">
2744
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<pre style="margin: 0;"> <span id="LC2744" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Find the subset of bndrs that are mentioned in uds</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="2646" 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">
2646
</td>
<td class="diff-line-num new_line old" data-linenumber="2745" 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">
 
</td>
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<pre style="margin: 0;">-<span id="LC2646" class="line" lang="haskell"><span class="n" style="color: #333;">udFreeVars</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">ud</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">restrictUniqSetToUFM</span> <span class="n" style="color: #333;">bndrs</span> <span class="p">(</span><span class="n" style="color: #333;">ud_env</span> <span class="n" style="color: #333;">ud</span><span class="p">)</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="2647" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="2745" 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">
2745
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC2745" class="line" lang="haskell"><span class="n" style="color: #333;">udFreeVars</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">ud</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">restrictFreeVars</span> <span class="n" style="color: #333;">bndrs</span> <span class="p">(</span><span class="n" style="color: #333;">ud_env</span> <span class="n" style="color: #333;">ud</span><span class="p">)</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="2647" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="2746" 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">
2746
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC2746" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="2647" 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="2747" 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">
2747
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC2747" class="line" lang="haskell"><span class="n" style="color: #333;">restrictFreeVars</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;">OccInfoEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="2647" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="2748" 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">
2748
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<pre style="margin: 0;">+<span id="LC2748" class="line" lang="haskell"><span class="n" style="color: #333;">restrictFreeVars</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">restrictUniqSetToUFM</span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">fvs</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2647" 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">
2647
</td>
<td class="diff-line-num new_line" data-linenumber="2749" 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">
2749
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC2749" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2648" 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">
2648
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<td class="diff-line-num new_line" data-linenumber="2750" 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">
2750
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<pre style="margin: 0;"> <span id="LC2750" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Do not mark CoVars as dead]</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2649" 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">
2649
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<td class="diff-line-num new_line" data-linenumber="2751" 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">
2751
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<pre style="margin: 0;"> <span id="LC2751" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
</pre>
</td>
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<tr class="line_holder match" id="" style="line-height: 1.6;">
<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2712" 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="2814" 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">@@ -2712,20 +2814,20 @@ flattenUsageDetails ud</td>
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<td class="diff-line-num old_line" data-linenumber="2712" 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">
2712
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<td class="diff-line-num new_line" data-linenumber="2814" 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">
2814
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC2814" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2713" 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">
2713
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<td class="diff-line-num new_line" data-linenumber="2815" 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">
2815
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<pre style="margin: 0;"> <span id="LC2815" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-------------------</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2714" 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">
2714
</td>
<td class="diff-line-num new_line" data-linenumber="2816" 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">
2816
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<pre style="margin: 0;"> <span id="LC2816" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Adjusting right-hand sides]</span></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="2715" 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">
2715
</td>
<td class="diff-line-num new_line old" data-linenumber="2817" 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="LC2715" class="line" lang="haskell"><span class="n" style="color: #333;">adjustRhsUsage</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Maybe</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">JoinArity</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">RecFlag</span></span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="2716" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="2817" 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">
2817
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<pre style="margin: 0;">+<span id="LC2817" class="line" lang="haskell"><span class="n" style="color: #333;">adjustRhsUsage</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">RecFlag</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Maybe</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">JoinArity</span></span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2716" 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">
2716
</td>
<td class="diff-line-num new_line" data-linenumber="2818" 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">
2818
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<pre style="margin: 0;"> <span id="LC2818" 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;">CoreBndr</span><span class="p">]</span>     <span class="c1" style="color: #998; font-style: italic;">-- Outer lambdas, AFTER occ anal</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2717" 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">
2717
</td>
<td class="diff-line-num new_line" data-linenumber="2819" 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">
2819
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<pre style="margin: 0;"> <span id="LC2819" 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;">-- From body of lambda</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2718" 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">
2718
</td>
<td class="diff-line-num new_line" data-linenumber="2820" 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">
2820
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<pre style="margin: 0;"> <span id="LC2820" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageDetails</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="2719" 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">
2719
</td>
<td class="diff-line-num new_line old" data-linenumber="2821" 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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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">
<pre style="margin: 0;">-<span id="LC2719" class="line" lang="haskell"><span class="n" style="color: #333;">adjustRhsUsage</span> <span class="n" style="color: #333;"><span class="idiff left">mb_join_arity</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">rec_flag</span></span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">usage</span></span>
</pre>
</td>
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<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="2720" 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">
2720
</td>
<td class="diff-line-num new_line old" data-linenumber="2821" 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="LC2720" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">markAllInsideLamIf</span> <span class="idiff left">    </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">not</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">one_shot</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff right">  </span> <span class="o" style="font-weight: 600;">$</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="2721" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="2821" 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">
2821
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<pre style="margin: 0;">+<span id="LC2821" class="line" lang="haskell"><span class="n" style="color: #333;">adjustRhsUsage</span> <span class="n" style="color: #333;"><span class="idiff left">is_rec</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">mb_join_arity</span></span> <span class="n" style="color: #333;">bndrs</span> <span class="n" style="color: #333;">usage</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="2721" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="2822" 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">
2822
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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">
<pre style="margin: 0;">+<span id="LC2822" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">markAllInsideLamIf</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">not</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">one_shot</span></span><span class="p"><span class="idiff right">)</span></span> <span class="o" style="font-weight: 600;">$</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2721" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
2721
</td>
<td class="diff-line-num new_line" data-linenumber="2823" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
2823
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<pre style="margin: 0;"> <span id="LC2823" class="line" lang="haskell">    <span class="n" style="color: #333;">markAllNonTailIf</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">exact_join</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2722" 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">
2722
</td>
<td class="diff-line-num new_line" data-linenumber="2824" 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">
2824
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC2824" class="line" lang="haskell">    <span class="n" style="color: #333;">usage</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2723" 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">
2723
</td>
<td class="diff-line-num new_line" data-linenumber="2825" 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">
2825
</td>
<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC2825" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2724" 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">
2724
</td>
<td class="diff-line-num new_line" data-linenumber="2826" 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">
2826
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<pre style="margin: 0;"> <span id="LC2826" class="line" lang="haskell">    <span class="n" style="color: #333;">one_shot</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="kr" style="font-weight: 600;">of</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="2725" 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">
2725
</td>
<td class="diff-line-num new_line" data-linenumber="2827" 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">
2827
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<pre style="margin: 0;"> <span id="LC2827" class="line" lang="haskell">                 <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">join_arity</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="2726" 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">
2726
</td>
<td class="diff-line-num new_line old" data-linenumber="2828" 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="LC2726" class="line" lang="haskell">                   <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isRec</span> <span class="n" style="color: #333;"><span class="idiff left right">rec_flag</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="2727" 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">
2727
</td>
<td class="diff-line-num new_line old" data-linenumber="2828" 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="LC2727" class="line" lang="haskell">                   <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>    <span class="idiff left right">  </span><span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">all</span> <span class="n" style="color: #333;">isOneShotBndr</span> <span class="p">(</span><span class="n" style="color: #333;">drop</span> <span class="n" style="color: #333;">join_arity</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span></span>
</pre>
</td>
</tr>
<tr class="line_holder old" id="" style="line-height: 1.6;">
<td class="diff-line-num old old_line" data-linenumber="2728" 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">
2728
</td>
<td class="diff-line-num new_line old" data-linenumber="2828" 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="LC2728" class="line" lang="haskell">                 <span class="kt" style="color: #458; font-weight: 600;">Nothing</span>          <span class="idiff left right">  </span><span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">all</span> <span class="n" style="color: #333;">isOneShotBndr</span> <span class="n" style="color: #333;">bndrs</span></span>
</pre>
</td>
</tr>
<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="2729" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="2828" 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">
2828
</td>
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<pre style="margin: 0;">+<span id="LC2828" class="line" lang="haskell">                   <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isRec</span> <span class="n" style="color: #333;"><span class="idiff left right">is_rec</span></span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
</pre>
</td>
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<tr class="line_holder new" id="" style="line-height: 1.6;">
<td class="diff-line-num new old_line" data-linenumber="2729" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="2829" 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">
2829
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<pre style="margin: 0;">+<span id="LC2829" 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;">all</span> <span class="n" style="color: #333;">isOneShotBndr</span> <span class="p">(</span><span class="n" style="color: #333;">drop</span> <span class="n" style="color: #333;">join_arity</span> <span class="n" style="color: #333;">bndrs</span><span class="p">)</span></span>
</pre>
</td>
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<td class="diff-line-num new old_line" data-linenumber="2729" 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">
 
</td>
<td class="diff-line-num new new_line" data-linenumber="2830" 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">
2830
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<pre style="margin: 0;">+<span id="LC2830" 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;">all</span> <span class="n" style="color: #333;">isOneShotBndr</span> <span class="n" style="color: #333;">bndrs</span></span>
</pre>
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2729
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2831
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<pre style="margin: 0;"> <span id="LC2831" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2730" 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">
2730
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<td class="diff-line-num new_line" data-linenumber="2832" 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">
2832
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<pre style="margin: 0;"> <span id="LC2832" class="line" lang="haskell">    <span class="n" style="color: #333;">exact_join</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exactJoin</span> <span class="n" style="color: #333;">mb_join_arity</span> <span class="n" style="color: #333;">bndrs</span></span>
</pre>
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2731
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<td class="diff-line-num new_line" data-linenumber="2833" 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">
2833
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<pre style="margin: 0;"> <span id="LC2833" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2806" 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="2908" 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">@@ -2806,7 +2908,7 @@ tagRecBinders lvl body_uds triples</td>
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<td class="diff-line-num new_line" data-linenumber="2908" 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">
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<pre style="margin: 0;"> <span id="LC2908" class="line" lang="haskell">     <span class="c1" style="color: #998; font-style: italic;">--    join-point-hood decision</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2807" 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">
2807
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<td class="diff-line-num new_line" data-linenumber="2909" 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">
2909
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<pre style="margin: 0;"> <span id="LC2909" class="line" lang="haskell">     <span class="n" style="color: #333;">rhs_udss'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">adjust</span> <span class="n" style="color: #333;">triples</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="2808" 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">
2808
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<td class="diff-line-num new_line" data-linenumber="2910" 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">
2910
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<pre style="margin: 0;"> <span id="LC2910" class="line" lang="haskell">     <span class="n" style="color: #333;">adjust</span> <span class="p">(</span><span class="n" style="color: #333;">bndr</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_uds</span><span class="p">,</span> <span class="n" style="color: #333;">rhs_bndrs</span><span class="p">)</span></span>
</pre>
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<td class="diff-line-num new_line old" data-linenumber="2911" 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="LC2809" class="line" lang="haskell">       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">adjustRhsUsage</span> <span class="n" style="color: #333;"><span class="idiff left">mb_join_arity</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Recursive</span></span> <span class="n" style="color: #333;">rhs_bndrs</span> <span class="n" style="color: #333;">rhs_uds</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC2911" class="line" lang="haskell">       <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;"><span class="idiff left">Recursive</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">mb_join_arity</span></span> <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 new_line" data-linenumber="2912" 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">
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<pre style="margin: 0;"> <span id="LC2912" class="line" lang="haskell">       <span class="kr" style="font-weight: 600;">where</span></span>
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<td class="diff-line-num new_line" data-linenumber="2913" 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">
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<pre style="margin: 0;"> <span id="LC2913" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- Can't use willBeJoinId_maybe here because we haven't tagged the</span></span>
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<td class="diff-line-num new_line" data-linenumber="2914" 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">
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<pre style="margin: 0;"> <span id="LC2914" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- binder yet (the tag depends on these adjustments!)</span></span>
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<br>
</li>
<li id="d1d7de5bc3d2b577ac871114201f27e9ccc2f689">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3b2531f680c4d8e034d0b1936ef975648a2b4462#d1d7de5bc3d2b577ac871114201f27e9ccc2f689"><strong>testsuite/tests/simplCore/should_compile/T18603.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE NoImplicitPrelude #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">Test</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="0" 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="5" 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">
5
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Base</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">build</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">foldr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">id</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>
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7
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="n" style="color: #333;">catMaybes</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">a</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span></span>
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8
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="n" style="color: #333;">catMaybes</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapMaybe</span> <span class="n" style="color: #333;">id</span></span>
</pre>
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9
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"></span>
</pre>
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10
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="n" style="color: #333;">mapMaybe</span>          <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">b</span><span class="p">]</span></span>
</pre>
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11
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">mapMaybe</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span>     <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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12
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="n" style="color: #333;">mapMaybe</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">xs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
</pre>
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13
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">rs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapMaybe</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">xs</span> <span class="kr" style="font-weight: 600;">in</span></span>
</pre>
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14
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">x</span> <span class="kr" style="font-weight: 600;">of</span></span>
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15
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<pre style="margin: 0;">+<span id="LC15" 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;">rs</span></span>
</pre>
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16
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">r</span>  <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">r</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">rs</span></span>
</pre>
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17
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE [1] mapMaybe #-}</span></span>
</pre>
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18
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"></span>
</pre>
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19
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# RULES</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">"mapMaybe"     [~1] forall f xs. mapMaybe f xs</span></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">                    = build (\c n -> foldr (mapMaybeFB c f) n xs)</span></span>
</pre>
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22
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">"mapMaybeList" [1]  forall f. foldr (mapMaybeFB (:) f) [] = mapMaybe f</span></span>
</pre>
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23
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">  #-}</span></span>
</pre>
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24
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"></span>
</pre>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE [0] mapMaybeFB #-}</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Inline FB functions] in GHC.List</span></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="n" style="color: #333;">mapMaybeFB</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">r</span></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"><span class="n" style="color: #333;">mapMaybeFB</span> <span class="n" style="color: #333;">cons</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">next</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">x</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC28" 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;">next</span></span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">cons</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">next</span></span></pre>
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<li id="fc07c260b75644727a8cdc1af5c861a44d4bfb5e">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3b2531f680c4d8e034d0b1936ef975648a2b4462#fc07c260b75644727a8cdc1af5c861a44d4bfb5e"><strong>testsuite/tests/simplCore/should_compile/all.T</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="333" 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">@@ -333,3 +333,4 @@ test('T18347', normal, compile, ['-dcore-lint -O'])</td>
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<pre style="margin: 0;"> <span id="LC333" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18355</span><span class="p">',</span> <span class="p">[</span> <span class="nv" style="color: #008080;">grep_errmsg</span><span class="p">(</span><span class="nv" style="color: #008080;">r</span><span class="p">'</span><span class="s1" style="color: #d14;">OneShot</span><span class="p">')</span> <span class="p">],</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-O -ddump-simpl -dsuppress-uniques</span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC334" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18399</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-dcore-lint -O</span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC335" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18589</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-dcore-lint -O</span><span class="p">'])</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC336" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18603</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-dcore-lint -O</span><span class="p">'])</span></span></pre>
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