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<h3>
Andreas Klebinger pushed to branch wip/andreask/refactor_cmm_weights
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/d8a84cbc5f3594db4a99c5805f570342aa6041af">d8a84cbc</a></strong>
<div>
<span>by Andreas Klebinger</span>
<i>at 2020-04-07T10:28:42+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Refactor linear reg alloc to remember past assignments.
We used to pick the first free register, which
is damn fast but produces fixup blocks on the regular.
Now we look for past assignments first. This means for
loops with blocks A, B, C if a variable is live in A & C
we will pick the right register (if available) in C.
This avoids some needless fixup blocks.
</pre>
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<h4>11 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#5986ebaacfa99d264abfd2f7ef19d99a64db720f">
compiler/GHC/CmmToAsm/BlockLayout.hs
</a>
</li>
<li class="file-stats">
<a href="#d6e95c6ffd8955a51f59d69de7525bebd693db69">
compiler/GHC/CmmToAsm/CFG.hs
</a>
</li>
<li class="file-stats">
<a href="#ee14f325b8d394d681c0d3c18a3477016d1092ef">
compiler/GHC/CmmToAsm/Instr.hs
</a>
</li>
<li class="file-stats">
<a href="#83a3b2df5c77503c3a8c6df05a7654333d30cac3">
compiler/GHC/CmmToAsm/Reg/Linear.hs
</a>
</li>
<li class="file-stats">
<a href="#e7e32ef13a93a68891f700047f89c45df0e3772d">
compiler/GHC/CmmToAsm/Reg/Linear/Base.hs
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</li>
<li class="file-stats">
<a href="#b3464ce8651c663fa952441e77c36955a283cd00">
compiler/GHC/CmmToAsm/Reg/Linear/PPC.hs
</a>
</li>
<li class="file-stats">
<a href="#9c35bb499c0b984f0940353f6f8514d39fe10870">
compiler/GHC/CmmToAsm/Reg/Linear/SPARC.hs
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</li>
<li class="file-stats">
<a href="#8fc0cb54eee9a1662a2e0ced10fc6eef66561a72">
compiler/GHC/CmmToAsm/Reg/Linear/State.hs
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<li class="file-stats">
<a href="#8a5d5b6d1415946cdbebc680a0c9d26ebca2a497">
compiler/GHC/CmmToAsm/Reg/Linear/X86.hs
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<li class="file-stats">
<a href="#c2a3ab492c92cc765c97d9d8a6537aacdd65f1f9">
compiler/GHC/CmmToAsm/Reg/Linear/X86_64.hs
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<li class="file-stats">
<a href="#7cb0c3b8a55988740abfeec25509f3897dd73950">
compiler/utils/Outputable.hs
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<h4>Changes:</h4>
<li id="5986ebaacfa99d264abfd2f7ef19d99a64db720f">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d8a84cbc5f3594db4a99c5805f570342aa6041af#5986ebaacfa99d264abfd2f7ef19d99a64db720f"><strong>compiler/GHC/CmmToAsm/BlockLayout.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">@@ -639,17 +639,19 @@ sequenceChain _info _weights [x] = [x]</td>
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<pre style="margin: 0;"> <span id="LC639" class="line" lang="haskell"><span class="n" style="color: #333;">sequenceChain</span> <span class="n" style="color: #333;">info</span> <span class="n" style="color: #333;">weights'</span> <span class="n" style="color: #333;">blocks</span><span class="o" style="font-weight: 600;">@</span><span class="p">((</span><span class="kt" style="color: #458; font-weight: 600;">BasicBlock</span> <span class="n" style="color: #333;">entry</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span><span class="o" style="font-weight: 600;">:</span><span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;"> <span id="LC640" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">weights</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CFG</span></span>
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<pre style="margin: 0;"> <span id="LC641" class="line" lang="haskell"> <span class="n" style="color: #333;">weights</span> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">--pprTrace "cfg'" (pprEdgeWeights cfg')</span></span>
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<pre style="margin: 0;">-<span id="LC642" class="line" lang="haskell"> <span class="n" style="color: #333;">cfg'</span></span>
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<pre style="margin: 0;">+<span id="LC642" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- cfg'</span></span>
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<pre style="margin: 0;">+<span id="LC643" class="line" lang="haskell"> <span class="n" style="color: #333;">weights'</span></span>
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<pre style="margin: 0;"> <span id="LC644" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC644" class="line" lang="haskell"> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">globalEdgeWeights</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="cp" style="color: #999; font-weight: 600;">{-# SCC mkGlobalWeights #-}</span> <span class="n" style="color: #333;">mkGlobalWeights</span> <span class="n" style="color: #333;">entry</span> <span class="n" style="color: #333;">weights'</span></span>
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<pre style="margin: 0;">-<span id="LC645" class="line" lang="haskell"> <span class="n" style="color: #333;">cfg'</span> <span class="o" style="font-weight: 600;">=</span> <span class="cp" style="color: #999; font-weight: 600;">{-# SCC rewriteEdges #-}</span></span>
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<pre style="margin: 0;">-<span id="LC646" class="line" lang="haskell"> <span class="n" style="color: #333;">mapFoldlWithKey</span></span>
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<pre style="margin: 0;">-<span id="LC647" class="line" lang="haskell"> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">cfg</span> <span class="n" style="color: #333;">from</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">-<span id="LC648" class="line" lang="haskell"> <span class="n" style="color: #333;">mapFoldlWithKey</span></span>
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<pre style="margin: 0;">-<span id="LC649" class="line" lang="haskell"> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">cfg</span> <span class="n" style="color: #333;">to</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">setEdgeWeight</span> <span class="n" style="color: #333;">cfg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EdgeWeight</span> <span class="n" style="color: #333;">w</span><span class="p">)</span> <span class="n" style="color: #333;">from</span> <span class="n" style="color: #333;">to</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC650" class="line" lang="haskell"> <span class="n" style="color: #333;">cfg</span> <span class="n" style="color: #333;">m</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC651" class="line" lang="haskell"> <span class="n" style="color: #333;">weights'</span></span>
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<pre style="margin: 0;">-<span id="LC652" class="line" lang="haskell"> <span class="n" style="color: #333;">globalEdgeWeights</span></span>
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<pre style="margin: 0;">+<span id="LC645" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- TODO: Remove</span></span>
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<pre style="margin: 0;">+<span id="LC646" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (_, globalEdgeWeights) = {-# SCC mkGlobalWeights #-} mkGlobalWeights entry weights'</span></span>
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<pre style="margin: 0;">+<span id="LC647" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- cfg' = {-# SCC rewriteEdges #-}</span></span>
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<pre style="margin: 0;">+<span id="LC648" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- mapFoldlWithKey</span></span>
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<pre style="margin: 0;">+<span id="LC649" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (\cfg from m -></span></span>
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<pre style="margin: 0;">+<span id="LC650" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- mapFoldlWithKey</span></span>
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<pre style="margin: 0;">+<span id="LC651" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (\cfg to w -> setEdgeWeight cfg (EdgeWeight w) from to )</span></span>
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<pre style="margin: 0;">+<span id="LC652" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- cfg m )</span></span>
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<pre style="margin: 0;">+<span id="LC653" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- weights'</span></span>
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<pre style="margin: 0;">+<span id="LC654" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- globalEdgeWeights</span></span>
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<pre style="margin: 0;"> <span id="LC655" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC656" class="line" lang="haskell"> <span class="n" style="color: #333;">directEdges</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CfgEdge</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC657" class="line" lang="haskell"> <span class="n" style="color: #333;">directEdges</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sortBy</span> <span class="p">(</span><span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">compare</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">catMaybes</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">relevantWeight</span> <span class="o" style="font-weight: 600;">$</span> <span class="p">(</span><span class="n" style="color: #333;">infoEdgeList</span> <span class="n" style="color: #333;">weights</span><span class="p">)</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d8a84cbc5f3594db4a99c5805f570342aa6041af#d6e95c6ffd8955a51f59d69de7525bebd693db69"><strong>compiler/GHC/CmmToAsm/CFG.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">@@ -670,11 +670,20 @@ findBackEdges root cfg =</td>
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<pre style="margin: 0;"> <span id="LC670" class="line" lang="haskell"> <span class="n" style="color: #333;">typedEdges</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;"> <span id="LC671" class="line" lang="haskell"> <span class="n" style="color: #333;">classifyEdges</span> <span class="n" style="color: #333;">root</span> <span class="n" style="color: #333;">getSuccs</span> <span class="n" style="color: #333;">edges</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[((</span><span class="kt" style="color: #458; font-weight: 600;">BlockId</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">BlockId</span><span class="p">),</span><span class="kt" style="color: #458; font-weight: 600;">EdgeType</span><span class="p">)]</span></span>
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<pre style="margin: 0;"> <span id="LC672" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC673" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC673" class="line" lang="haskell"><span class="n" style="color: #333;">optimizeCFG</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">D</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">CfgWeights</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RawCmmDecl</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CFG</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CFG</span></span>
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<pre style="margin: 0;"> <span id="LC674" class="line" lang="haskell"><span class="n" style="color: #333;">optimizeCFG</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CmmData</span> <span class="p">{})</span> <span class="n" style="color: #333;">cfg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cfg</span></span>
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<pre style="margin: 0;">-<span id="LC676" class="line" lang="haskell"><span class="n" style="color: #333;">optimizeCFG</span> <span class="n" style="color: #333;">weights</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CmmProc</span> <span class="n" style="color: #333;">info</span> <span class="n" style="color: #333;">_lab</span> <span class="n" style="color: #333;">_live</span> <span class="n" style="color: #333;">graph</span><span class="p">)</span> <span class="n" style="color: #333;">cfg</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC677" class="line" lang="haskell"> <span class="cp" style="color: #999; font-weight: 600;">{-# SCC optimizeCFG #-}</span></span>
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<pre style="margin: 0;">+<span id="LC675" class="line" lang="haskell"><span class="n" style="color: #333;">optimizeCFG</span> <span class="n" style="color: #333;">weights</span> <span class="n" style="color: #333;">proc</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CmmProc</span> <span class="n" style="color: #333;">_info</span> <span class="n" style="color: #333;">_lab</span> <span class="n" style="color: #333;">_live</span> <span class="n" style="color: #333;">graph</span><span class="p">)</span> <span class="n" style="color: #333;">cfg</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC676" class="line" lang="haskell"> <span class="n" style="color: #333;">staticPredCfg</span> <span class="p">(</span><span class="n" style="color: #333;">g_entry</span> <span class="n" style="color: #333;">graph</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">optHsPatterns</span> <span class="n" style="color: #333;">weights</span> <span class="n" style="color: #333;">proc</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">cfg</span></span>
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<pre style="margin: 0;">+<span id="LC677" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC678" class="line" lang="haskell"><span class="cd">-- | Modify branch weights based on educated guess on</span></span>
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<pre style="margin: 0;">+<span id="LC679" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- patterns GHC tends to produce and how they affect</span></span>
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<pre style="margin: 0;">+<span id="LC680" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- performance.</span></span>
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<pre style="margin: 0;">+<span id="LC681" 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="LC682" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Most importantly we penalize jumps across info tables.</span></span>
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<pre style="margin: 0;">+<span id="LC683" class="line" lang="haskell"><span class="n" style="color: #333;">optHsPatterns</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">D</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">CfgWeights</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RawCmmDecl</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CFG</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CFG</span></span>
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<pre style="margin: 0;">+<span id="LC684" class="line" lang="haskell"><span class="n" style="color: #333;">optHsPatterns</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CmmData</span> <span class="p">{})</span> <span class="n" style="color: #333;">cfg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cfg</span></span>
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<pre style="margin: 0;">+<span id="LC685" class="line" lang="haskell"><span class="n" style="color: #333;">optHsPatterns</span> <span class="n" style="color: #333;">weights</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CmmProc</span> <span class="n" style="color: #333;">info</span> <span class="n" style="color: #333;">_lab</span> <span class="n" style="color: #333;">_live</span> <span class="n" style="color: #333;">graph</span><span class="p">)</span> <span class="n" style="color: #333;">cfg</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC686" class="line" lang="haskell"> <span class="cp" style="color: #999; font-weight: 600;">{-# SCC optHsPatterns #-}</span></span>
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<pre style="margin: 0;"> <span id="LC687" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "Initial:" (pprEdgeWeights cfg) $</span></span>
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<pre style="margin: 0;"> <span id="LC688" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- pprTrace "Initial:" (ppr $ mkGlobalWeights (g_entry graph) cfg) $</span></span>
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<pre style="margin: 0;"> <span id="LC689" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -749,6 +758,21 @@ optimizeCFG weights (CmmProc info _lab _live graph) cfg =</td>
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<pre style="margin: 0;"> <span id="LC758" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">CmmSource</span> <span class="p">{</span> <span class="n" style="color: #333;">trans_cmmNode</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">CmmCondBranch</span> <span class="p">{}</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">source</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;"> <span id="LC759" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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760
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<pre style="margin: 0;"> <span id="LC760" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC761" class="line" lang="haskell"><span class="cd">-- |</span></span>
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<pre style="margin: 0;">+<span id="LC762" class="line" lang="haskell"><span class="n" style="color: #333;">staticPredCfg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">BlockId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CFG</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CFG</span></span>
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<pre style="margin: 0;">+<span id="LC763" class="line" lang="haskell"><span class="n" style="color: #333;">staticPredCfg</span> <span class="n" style="color: #333;">entry</span> <span class="n" style="color: #333;">cfg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cfg'</span></span>
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<pre style="margin: 0;">+<span id="LC764" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC765" class="line" lang="haskell"> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">globalEdgeWeights</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="cp" style="color: #999; font-weight: 600;">{-# SCC mkGlobalWeights #-}</span></span>
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<pre style="margin: 0;">+<span id="LC766" class="line" lang="haskell"> <span class="n" style="color: #333;">mkGlobalWeights</span> <span class="n" style="color: #333;">entry</span> <span class="n" style="color: #333;">cfg</span></span>
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<pre style="margin: 0;">+<span id="LC767" class="line" lang="haskell"> <span class="n" style="color: #333;">cfg'</span> <span class="o" style="font-weight: 600;">=</span> <span class="cp" style="color: #999; font-weight: 600;">{-# SCC rewriteEdges #-}</span></span>
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768
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<pre style="margin: 0;">+<span id="LC768" class="line" lang="haskell"> <span class="n" style="color: #333;">mapFoldlWithKey</span></span>
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769
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<pre style="margin: 0;">+<span id="LC769" class="line" lang="haskell"> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">cfg</span> <span class="n" style="color: #333;">from</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">-></span></span>
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770
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<pre style="margin: 0;">+<span id="LC770" class="line" lang="haskell"> <span class="n" style="color: #333;">mapFoldlWithKey</span></span>
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771
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<pre style="margin: 0;">+<span id="LC771" class="line" lang="haskell"> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">cfg</span> <span class="n" style="color: #333;">to</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">setEdgeWeight</span> <span class="n" style="color: #333;">cfg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EdgeWeight</span> <span class="n" style="color: #333;">w</span><span class="p">)</span> <span class="n" style="color: #333;">from</span> <span class="n" style="color: #333;">to</span> <span class="p">)</span></span>
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772
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<pre style="margin: 0;">+<span id="LC772" class="line" lang="haskell"> <span class="n" style="color: #333;">cfg</span> <span class="n" style="color: #333;">m</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC773" class="line" lang="haskell"> <span class="n" style="color: #333;">cfg</span></span>
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<pre style="margin: 0;">+<span id="LC774" class="line" lang="haskell"> <span class="n" style="color: #333;">globalEdgeWeights</span></span>
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<pre style="margin: 0;">+<span id="LC775" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC776" class="line" lang="haskell"><span class="cd">-- | Determine loop membership of blocks based on SCC analysis</span></span>
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<pre style="margin: 0;"> <span id="LC777" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This is faster but only gives yes/no answers.</span></span>
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<pre style="margin: 0;"> <span id="LC778" class="line" lang="haskell"><span class="n" style="color: #333;">loopMembers</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">CFG</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LabelMap</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</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">@@ -922,6 +946,10 @@ revPostorderFrom cfg root =</td>
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<pre style="margin: 0;"> <span id="LC946" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- reverse post order. Which is required for diamond control flow to work probably.</span></span>
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947
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<pre style="margin: 0;"> <span id="LC947" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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948
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<pre style="margin: 0;"> <span id="LC948" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We also apply a few prediction heuristics (based on the same paper)</span></span>
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949
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<pre style="margin: 0;">+<span id="LC949" 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="LC950" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The returned result represents frequences.</span></span>
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<pre style="margin: 0;">+<span id="LC951" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- For blocks it's the expected number of executions and</span></span>
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952
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<pre style="margin: 0;">+<span id="LC952" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- for edges is the number of traversals.</span></span>
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<pre style="margin: 0;"> <span id="LC953" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC954" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE mkGlobalWeights #-}</span></span>
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<pre style="margin: 0;"> <span id="LC955" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# SCC mkGlobalWeights #-}</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d8a84cbc5f3594db4a99c5805f570342aa6041af#ee14f325b8d394d681c0d3c18a3477016d1092ef"><strong>compiler/GHC/CmmToAsm/Instr.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">@@ -37,7 +37,10 @@ import GHC.CmmToAsm.Config</td>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (for allocation purposes, anyway).</span></span>
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<pre style="margin: 0;"> <span id="LC38" 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="LC39" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">RegUsage</span></span>
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<pre style="margin: 0;">-<span id="LC40" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">RU</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Reg</span><span class="p">]</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Reg</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">RU</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC41" class="line" lang="haskell"> <span class="n" style="color: #333;">reads</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Reg</span><span class="p">],</span></span>
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<pre style="margin: 0;">+<span id="LC42" class="line" lang="haskell"> <span class="n" style="color: #333;">writes</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Reg</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC43" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"><span class="cd">-- | No regs read or written to.</span></span>
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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell"><span class="n" style="color: #333;">noUsage</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RegUsage</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d8a84cbc5f3594db4a99c5805f570342aa6041af#83a3b2df5c77503c3a8c6df05a7654333d30cac3"><strong>compiler/GHC/CmmToAsm/Reg/Linear.hs</strong></a>
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1
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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 BangPatterns, CPP, ScopedTypeVariables #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE ConstraintKinds #-}</span></span>
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# OPTIONS_GHC -Wno-incomplete-uni-patterns #-}</span></span>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -137,6 +138,7 @@ import GHC.Platform</td>
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<pre style="margin: 0;"> <span id="LC138" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Maybe</span></span>
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<pre style="margin: 0;"> <span id="LC139" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span></span>
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<pre style="margin: 0;"> <span id="LC140" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span></span>
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<pre style="margin: 0;">+<span id="LC141" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Applicative</span></span>
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<pre style="margin: 0;"> <span id="LC142" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC143" 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="LC144" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Top level of the register allocator</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">@@ -229,8 +231,12 @@ linearRegAlloc config entry_ids block_live sccs</td>
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<pre style="margin: 0;"> <span id="LC231" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">linearRegAlloc'</span> <span class="n" style="color: #333;">config</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">entry_ids</span> <span class="n" style="color: #333;">block_live</span> <span class="n" style="color: #333;">sccs</span></span>
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<pre style="margin: 0;"> <span id="LC232" class="line" lang="haskell"> <span class="n" style="color: #333;">platform</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ncgPlatform</span> <span class="n" style="color: #333;">config</span></span>
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<pre style="margin: 0;"> <span id="LC233" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC234" class="line" lang="haskell"><span class="cd">-- |</span></span>
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<pre style="margin: 0;">+<span id="LC235" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">OutputableRegConstraint</span> <span class="n" style="color: #333;">freeRegs</span> <span class="n" style="color: #333;">instr</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC236" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">FR</span> <span class="n" style="color: #333;">freeRegs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="n" style="color: #333;">freeRegs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="n" style="color: #333;">instr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Instruction</span> <span class="n" style="color: #333;">instr</span><span class="p">)</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="n" style="color: #333;">linearRegAlloc'</span></span>
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<pre style="margin: 0;">-<span id="LC233" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">FR</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</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">Outputable</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</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">Instruction</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">+<span id="LC239" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">OutputableRegConstraint</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">instr</span></span></span>
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<pre style="margin: 0;"> <span id="LC240" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">NCGConfig</span></span>
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<pre style="margin: 0;"> <span id="LC241" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">freeRegs</span></span>
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<pre style="margin: 0;"> <span id="LC242" 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;">BlockId</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ entry points</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">@@ -246,7 +252,7 @@ linearRegAlloc' config initFreeRegs entry_ids block_live sccs</td>
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<pre style="margin: 0;"> <span id="LC252" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">blocks</span><span class="p">,</span> <span class="n" style="color: #333;">stats</span><span class="p">,</span> <span class="n" style="color: #333;">getStackUse</span> <span class="n" style="color: #333;">stack</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC253" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC254" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC249" class="line" lang="haskell"><span class="n" style="color: #333;">linearRA_SCCs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">FR</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</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">Instruction</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</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">Outputable</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">+<span id="LC255" class="line" lang="haskell"><span class="n" style="color: #333;">linearRA_SCCs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">OutputableRegConstraint</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">instr</span></span></span>
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250
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256
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<pre style="margin: 0;"> <span id="LC256" 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;">BlockId</span><span class="p">]</span></span>
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251
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257
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<pre style="margin: 0;"> <span id="LC257" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">BlockMap</span> <span class="kt" style="color: #458; font-weight: 600;">RegSet</span></span>
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252
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258
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<pre style="margin: 0;"> <span id="LC258" 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;">NatBasicBlock</span> <span class="n" style="color: #333;">instr</span><span class="p">]</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="281" style="width: 35px; color: rgba(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="287" style="width: 35px; color: rgba(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">@@ -281,7 +287,7 @@ linearRA_SCCs entry_ids block_live blocksAcc (CyclicSCC blocks : sccs)</td>
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281
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287
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<pre style="margin: 0;"> <span id="LC287" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> more sanity checking to guard against this eventuality.</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;">-}</span></span>
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289
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<pre style="margin: 0;"> <span id="LC289" class="line" lang="haskell"></span>
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284
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<pre style="margin: 0;">-<span id="LC284" class="line" lang="haskell"><span class="n" style="color: #333;">process</span> <span class="o" style="font-weight: 600;">::</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">FR</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</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">Instruction</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</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">Outputable</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">+<span id="LC290" class="line" lang="haskell"><span class="n" style="color: #333;">process</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">OutputableRegConstraint</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">instr</span></span></span>
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285
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<pre style="margin: 0;"> <span id="LC291" 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;">BlockId</span><span class="p">]</span></span>
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286
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<pre style="margin: 0;"> <span id="LC292" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">BlockMap</span> <span class="kt" style="color: #458; font-weight: 600;">RegSet</span></span>
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287
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<pre style="margin: 0;"> <span id="LC293" 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;">GenBasicBlock</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LiveInstr</span> <span class="n" style="color: #333;">instr</span><span class="p">)]</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="325" style="width: 35px; color: rgba(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">@@ -325,15 +331,20 @@ process entry_ids block_live (b@(BasicBlock id _) : blocks)</td>
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325
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331
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<pre style="margin: 0;"> <span id="LC331" class="line" lang="haskell"><span class="cd">-- | Do register allocation on this basic block</span></span>
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<pre style="margin: 0;"> <span id="LC332" 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="LC333" class="line" lang="haskell"><span class="n" style="color: #333;">processBlock</span></span>
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<pre style="margin: 0;">-<span id="LC328" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">FR</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</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">Outputable</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</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">Instruction</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">+<span id="LC334" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">OutputableRegConstraint</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">instr</span></span></span>
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329
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<pre style="margin: 0;"> <span id="LC335" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">BlockMap</span> <span class="kt" style="color: #458; font-weight: 600;">RegSet</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ live regs on entry to each basic block</span></span>
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<pre style="margin: 0;"> <span id="LC336" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LiveBasicBlock</span> <span class="n" style="color: #333;">instr</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ block to do register allocation on</span></span>
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<pre style="margin: 0;"> <span id="LC337" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RegM</span> <span class="n" style="color: #333;">freeRegs</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">NatBasicBlock</span> <span class="n" style="color: #333;">instr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ block with registers allocated</span></span>
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<pre style="margin: 0;"> <span id="LC338" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC339" class="line" lang="haskell"><span class="n" style="color: #333;">processBlock</span> <span class="n" style="color: #333;">block_live</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">BasicBlock</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">instrs</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC334" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">initBlock</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">block_live</span></span>
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<pre style="margin: 0;">+<span id="LC340" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="c1" style="color: #998; font-style: italic;">-- pprTraceM "processBlock" $ text "" $$ ppr (BasicBlock id instrs)</span></span>
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<pre style="margin: 0;">+<span id="LC341" class="line" lang="haskell"> <span class="n" style="color: #333;">initBlock</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">block_live</span></span>
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<pre style="margin: 0;">+<span id="LC342" class="line" lang="haskell"> <span class="n" style="color: #333;">assig</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getBlockAssigR</span></span>
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<pre style="margin: 0;">+<span id="LC343" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC344" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- pprTraceM "assignment" $ ppr assig</span></span>
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<pre style="margin: 0;"> <span id="LC345" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">instrs'</span><span class="p">,</span> <span class="n" style="color: #333;">fixups</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC346" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">linearRA</span> <span class="n" style="color: #333;">block_live</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">instrs</span></span>
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<pre style="margin: 0;">+<span id="LC347" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- pprTraceM "blockResult" $ ppr (instrs', fixups)</span></span>
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<pre style="margin: 0;"> <span id="LC348" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">BasicBlock</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">instrs'</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">fixups</span></span>
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<pre style="margin: 0;"> <span id="LC349" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC350" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -369,7 +380,7 @@ initBlock id block_live</td>
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<pre style="margin: 0;"> <span id="LC380" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC381" class="line" lang="haskell"><span class="cd">-- | Do allocation for a sequence of instructions.</span></span>
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<pre style="margin: 0;"> <span id="LC382" class="line" lang="haskell"><span class="n" style="color: #333;">linearRA</span></span>
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<pre style="margin: 0;">-<span id="LC372" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">FR</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</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">Outputable</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</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">Instruction</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">+<span id="LC383" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">OutputableRegConstraint</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">instr</span></span></span>
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384
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<pre style="margin: 0;"> <span id="LC384" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">BlockMap</span> <span class="kt" style="color: #458; font-weight: 600;">RegSet</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ map of what vregs are live on entry to each block.</span></span>
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374
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385
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<pre style="margin: 0;"> <span id="LC385" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">instr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ accumulator for instructions already processed.</span></span>
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375
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386
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<pre style="margin: 0;"> <span id="LC386" 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;">NatBasicBlock</span> <span class="n" style="color: #333;">instr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ accumulator for blocks of fixup code.</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="396" style="width: 35px; color: rgba(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">@@ -396,7 +407,7 @@ linearRA block_live accInstr accFixups id (instr:instrs)</td>
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396
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407
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<pre style="margin: 0;"> <span id="LC407" class="line" lang="haskell"></span>
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397
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408
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<pre style="margin: 0;"> <span id="LC408" class="line" lang="haskell"><span class="cd">-- | Do allocation for a single instruction.</span></span>
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398
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409
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<pre style="margin: 0;"> <span id="LC409" class="line" lang="haskell"><span class="n" style="color: #333;">raInsn</span></span>
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399
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<pre style="margin: 0;">-<span id="LC399" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">FR</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</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">Outputable</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</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">Instruction</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</span></span><span class="p"><span class="idiff right">)</span></span></span>
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410
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<pre style="margin: 0;">+<span id="LC410" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">OutputableRegConstraint</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">instr</span></span></span>
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400
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<pre style="margin: 0;"> <span id="LC411" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">BlockMap</span> <span class="kt" style="color: #458; font-weight: 600;">RegSet</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ map of what vregs are love on entry to each block.</span></span>
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401
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412
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<pre style="margin: 0;"> <span id="LC412" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">instr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ accumulator for instructions already processed.</span></span>
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402
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413
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<pre style="margin: 0;"> <span id="LC413" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">BlockId</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ the id of the current block, for debugging</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">@@ -476,7 +487,7 @@ isInReg src assig | Just (InReg _) <- lookupUFM assig src = True</td>
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476
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487
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<pre style="margin: 0;"> <span id="LC487" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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477
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488
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<pre style="margin: 0;"> <span id="LC488" class="line" lang="haskell"></span>
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478
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489
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<pre style="margin: 0;"> <span id="LC489" class="line" lang="haskell"></span>
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479
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<pre style="margin: 0;">-<span id="LC479" class="line" lang="haskell"><span class="n" style="color: #333;">genRaInsn</span> <span class="o" style="font-weight: 600;">::</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">FR</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</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">Instruction</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</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">Outputable</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</span></span><span class="p"><span class="idiff right">)</span></span></span>
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490
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<pre style="margin: 0;">+<span id="LC490" class="line" lang="haskell"><span class="n" style="color: #333;">genRaInsn</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">OutputableRegConstraint</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">instr</span></span></span>
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480
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491
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<pre style="margin: 0;"> <span id="LC491" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">BlockMap</span> <span class="kt" style="color: #458; font-weight: 600;">RegSet</span></span>
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481
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492
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<pre style="margin: 0;"> <span id="LC492" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">instr</span><span class="p">]</span></span>
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482
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493
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<pre style="margin: 0;"> <span id="LC493" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">BlockId</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="486" style="width: 35px; color: rgba(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="497" style="width: 35px; color: rgba(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">@@ -486,7 +497,9 @@ genRaInsn :: (FR freeRegs, Instruction instr, Outputable instr)</td>
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<pre style="margin: 0;"> <span id="LC497" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RegM</span> <span class="n" style="color: #333;">freeRegs</span> <span class="p">([</span><span class="n" style="color: #333;">instr</span><span class="p">],</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">NatBasicBlock</span> <span class="n" style="color: #333;">instr</span><span class="p">])</span></span>
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<pre style="margin: 0;"> <span id="LC498" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC499" class="line" lang="haskell"><span class="n" style="color: #333;">genRaInsn</span> <span class="n" style="color: #333;">block_live</span> <span class="n" style="color: #333;">new_instrs</span> <span class="n" style="color: #333;">block_id</span> <span class="n" style="color: #333;">instr</span> <span class="n" style="color: #333;">r_dying</span> <span class="n" style="color: #333;">w_dying</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC500" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- pprTraceM "genRaInsn" $ ppr (block_id, instr)</span></span>
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<pre style="margin: 0;"> <span id="LC501" class="line" lang="haskell"> <span class="n" style="color: #333;">platform</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getPlatform</span></span>
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<pre style="margin: 0;">+<span id="LC502" class="line" lang="haskell"> <span class="n" style="color: #333;">block_assig</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getBlockAssigR</span></span>
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<pre style="margin: 0;"> <span id="LC503" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">regUsageOfInstr</span> <span class="n" style="color: #333;">platform</span> <span class="n" style="color: #333;">instr</span> <span class="kr" style="font-weight: 600;">of</span> <span class="p">{</span> <span class="kt" style="color: #458; font-weight: 600;">RU</span> <span class="n" style="color: #333;">read</span> <span class="n" style="color: #333;">written</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;"> <span id="LC504" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span></span>
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492
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<pre style="margin: 0;"> <span id="LC505" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">real_written</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span> <span class="n" style="color: #333;">rr</span> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RegReal</span> <span class="n" style="color: #333;">rr</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">written</span> <span class="p">]</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -525,10 +538,12 @@ genRaInsn block_live new_instrs block_id instr r_dying w_dying = do</td>
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<pre style="margin: 0;"> <span id="LC538" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">fixup_blocks</span><span class="p">,</span> <span class="n" style="color: #333;">adjusted_instr</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC539" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">joinToTargets</span> <span class="n" style="color: #333;">block_live</span> <span class="n" style="color: #333;">block_id</span> <span class="n" style="color: #333;">instr</span></span>
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<pre style="margin: 0;"> <span id="LC540" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC541" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- when (not $ null fixup_blocks) $ pprTraceM "genRA:FixBlocks" $ ppr fixup_blocks</span></span>
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<pre style="margin: 0;">+<span id="LC542" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC543" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Debugging - show places where the reg alloc inserted</span></span>
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<pre style="margin: 0;"> <span id="LC544" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- assignment fixup blocks.</span></span>
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<pre style="margin: 0;">-<span id="LC530" class="line" lang="haskell"><span class="idiff left"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">--</span> when (not $ null fixup_blocks) $</span></span>
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<pre style="margin: 0;">-<span id="LC531" class="line" lang="haskell"><span class="idiff left"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">--</span> pprTrace "fixup_blocks" (ppr fixup_blocks) (return ())</span></span>
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<pre style="margin: 0;">+<span id="LC545" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">-- </span> when (not $ null fixup_blocks) $</span></span>
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<pre style="margin: 0;">+<span id="LC546" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">-- </span> pprTrace "fixup_blocks" (ppr fixup_blocks) (return ())</span></span>
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<pre style="margin: 0;"> <span id="LC547" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC548" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (e) Delete all register assignments for temps which are read</span></span>
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<pre style="margin: 0;"> <span id="LC549" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (only) and die here. Update the free register list.</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">@@ -737,7 +752,7 @@ data SpillLoc = ReadMem StackSlot -- reading from register only in memory</td>
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<pre style="margin: 0;"> <span id="LC752" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the list of free registers and free stack slots.</span></span>
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<pre style="margin: 0;"> <span id="LC753" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC754" class="line" lang="haskell"><span class="n" style="color: #333;">allocateRegsAndSpill</span></span>
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<pre style="margin: 0;">-<span id="LC740" 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;">FR</span> <span class="n" style="color: #333;">freeRegs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="n" style="color: #333;">instr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Instruction</span> <span class="n" style="color: #333;">instr</span><span class="p">)</span></span>
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755
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<pre style="margin: 0;">+<span id="LC755" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;"><span class="idiff left">forall</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">freeRegs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">instr</span></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;">FR</span> <span class="n" style="color: #333;">freeRegs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="n" style="color: #333;">instr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Instruction</span> <span class="n" style="color: #333;">instr</span><span class="p">)</span></span>
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741
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<pre style="margin: 0;"> <span id="LC756" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="c1" style="color: #998; font-style: italic;">-- True <=> reading (load up spilled regs)</span></span>
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<pre style="margin: 0;"> <span id="LC757" 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;">VirtualReg</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- don't push these out</span></span>
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758
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<pre style="margin: 0;"> <span id="LC758" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">instr</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- spill insns</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">@@ -749,7 +764,8 @@ allocateRegsAndSpill _ _ spills alloc []</td>
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<pre style="margin: 0;"> <span id="LC764" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">spills</span><span class="p">,</span> <span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">alloc</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC765" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC766" class="line" lang="haskell"><span class="n" style="color: #333;">allocateRegsAndSpill</span> <span class="n" style="color: #333;">reading</span> <span class="n" style="color: #333;">keep</span> <span class="n" style="color: #333;">spills</span> <span class="n" style="color: #333;">alloc</span> <span class="p">(</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 class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC752" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">assig</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getAssigR</span></span>
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<pre style="margin: 0;">+<span id="LC767" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">assig</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getAssigR</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RegM</span> <span class="n" style="color: #333;">freeRegs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RegMap</span> <span class="kt" style="color: #458; font-weight: 600;">Loc</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC768" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- pprTraceM "allocateRegsAndSpill:assig" (ppr (r:rs) $$ ppr assig)</span></span>
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<pre style="margin: 0;"> <span id="LC769" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">doSpill</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">allocRegsAndSpill_spill</span> <span class="n" style="color: #333;">reading</span> <span class="n" style="color: #333;">keep</span> <span class="n" style="color: #333;">spills</span> <span class="n" style="color: #333;">alloc</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">rs</span> <span class="n" style="color: #333;">assig</span></span>
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<pre style="margin: 0;"> <span id="LC770" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">lookupUFM</span> <span class="n" style="color: #333;">assig</span> <span class="n" style="color: #333;">r</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC771" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- case (1a): already in a register</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">@@ -779,6 +795,15 @@ allocateRegsAndSpill reading keep spills alloc (r:rs)</td>
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<pre style="margin: 0;"> <span id="LC795" class="line" lang="haskell"></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;">otherwise</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">doSpill</span> <span class="kt" style="color: #458; font-weight: 600;">WriteNew</span></span>
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<pre style="margin: 0;"> <span id="LC797" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC798" class="line" lang="haskell"><span class="n" style="color: #333;">findVirtRegAny</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">freeRegs</span> <span class="n" style="color: #333;">u</span><span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">Uniquable</span> <span class="n" style="color: #333;">u</span></span>
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<pre style="margin: 0;">+<span id="LC799" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">u</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RegM</span> <span class="n" style="color: #333;">freeRegs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">Loc</span><span class="p">)</span></span>
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800
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<pre style="margin: 0;">+<span id="LC800" class="line" lang="haskell"><span class="n" style="color: #333;">findVirtRegAny</span> <span class="n" style="color: #333;">vreg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC801" class="line" lang="haskell"> <span class="n" style="color: #333;">bassig</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getBlockAssigR</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RegM</span> <span class="n" style="color: #333;">freeRegs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">BlockMap</span> <span class="p">(</span><span class="n" style="color: #333;">freeRegs</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">RegMap</span> <span class="kt" style="color: #458; font-weight: 600;">Loc</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC802" class="line" lang="haskell"> <span class="n" style="color: #333;">return</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;">findVirtRegAssig</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="n" style="color: #333;">bassig</span></span>
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803
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<pre style="margin: 0;">+<span id="LC803" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC804" class="line" lang="haskell"> <span class="n" style="color: #333;">findVirtRegAssig</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">freeRegs</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">RegMap</span> <span class="kt" style="color: #458; font-weight: 600;">Loc</span><span class="p">)</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;">Loc</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;">Loc</span></span>
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<pre style="margin: 0;">+<span id="LC805" class="line" lang="haskell"> <span class="n" style="color: #333;">findVirtRegAssig</span> <span class="n" style="color: #333;">assig</span> <span class="n" style="color: #333;">z</span> <span class="o" style="font-weight: 600;">=</span></span>
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806
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<pre style="margin: 0;">+<span id="LC806" class="line" lang="haskell"> <span class="n" style="color: #333;">lookupUFM</span> <span class="p">(</span><span class="n" style="color: #333;">snd</span> <span class="n" style="color: #333;">assig</span><span class="p">)</span> <span class="n" style="color: #333;">vreg</span> <span class="o" style="font-weight: 600;"><|></span> <span class="n" style="color: #333;">z</span></span>
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<pre style="margin: 0;"> <span id="LC807" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC808" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- reading is redundant with reason, but we keep it around because it's</span></span>
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<pre style="margin: 0;"> <span id="LC809" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- convenient and it maintains the recursive structure of the allocator. -- EZY</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">@@ -795,13 +820,20 @@ allocRegsAndSpill_spill :: (FR freeRegs, Instruction instr, Outputable instr)</td>
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<pre style="margin: 0;"> <span id="LC820" class="line" lang="haskell"><span class="n" style="color: #333;">allocRegsAndSpill_spill</span> <span class="n" style="color: #333;">reading</span> <span class="n" style="color: #333;">keep</span> <span class="n" style="color: #333;">spills</span> <span class="n" style="color: #333;">alloc</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">rs</span> <span class="n" style="color: #333;">assig</span> <span class="n" style="color: #333;">spill_loc</span></span>
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<pre style="margin: 0;"> <span id="LC821" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">platform</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getPlatform</span></span>
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<pre style="margin: 0;"> <span id="LC822" class="line" lang="haskell"> <span class="n" style="color: #333;">freeRegs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getFreeRegsR</span></span>
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<pre style="margin: 0;">-<span id="LC798" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">freeRegs_thisClass</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">frGetFreeRegs</span> <span class="n" style="color: #333;">platform</span> <span class="p">(</span><span class="n" style="color: #333;">classOfVirtualReg</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="n" style="color: #333;">freeRegs</span></span>
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<pre style="margin: 0;">+<span id="LC823" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">freeRegs_thisClass</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">frGetFreeRegs</span> <span class="n" style="color: #333;">platform</span> <span class="p">(</span><span class="n" style="color: #333;">classOfVirtualReg</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="n" style="color: #333;">freeRegs</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">RealReg</span></span><span class="p"><span class="idiff right">]</span></span></span>
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<pre style="margin: 0;"> <span id="LC824" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC825" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">freeRegs_thisClass</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC826" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC827" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- case (2): we have a free register</span></span>
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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;">my_reg</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">-<span id="LC804" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">spills'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">loadTemp</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">spill_loc</span> <span class="n" style="color: #333;">my_reg</span> <span class="n" style="color: #333;">spills</span></span>
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<pre style="margin: 0;">+<span id="LC829" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">_r</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">findVirtRegAny</span> <span class="n" style="color: #333;">r</span></span>
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830
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<pre style="margin: 0;">+<span id="LC830" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- pprTraceM "free" $ ppr (_r, my_reg, freeRegs_thisClass)</span></span>
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<pre style="margin: 0;">+<span id="LC831" class="line" lang="haskell"> <span class="n" style="color: #333;">my_reg</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">_r</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC832" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">InReg</span> <span class="n" style="color: #333;">my_reg'</span><span class="p">)</span></span>
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833
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<pre style="margin: 0;">+<span id="LC833" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">my_reg'</span> <span class="p">`</span><span class="n" style="color: #333;">elem</span><span class="p">`</span> <span class="n" style="color: #333;">freeRegs_thisClass</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">my_reg'</span></span>
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<pre style="margin: 0;">+<span id="LC834" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">my_reg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RealReg</span></span>
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<pre style="margin: 0;">+<span id="LC835" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- pprTraceM "findVirtRegAny" $ ppr (my_reg, _r)</span></span>
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836
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<pre style="margin: 0;">+<span id="LC836" class="line" lang="haskell"> <span class="n" style="color: #333;">spills'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">loadTemp</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">spill_loc</span> <span class="n" style="color: #333;">my_reg</span> <span class="n" style="color: #333;">spills</span></span>
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805
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837
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<pre style="margin: 0;"> <span id="LC837" class="line" lang="haskell"></span>
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806
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838
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<pre style="margin: 0;"> <span id="LC838" class="line" lang="haskell"> <span class="n" style="color: #333;">setAssigR</span> <span class="p">(</span><span class="n" style="color: #333;">addToUFM</span> <span class="n" style="color: #333;">assig</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">$!</span> <span class="n" style="color: #333;">newLocation</span> <span class="n" style="color: #333;">spill_loc</span> <span class="n" style="color: #333;">my_reg</span><span class="p">)</span></span>
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807
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839
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<pre style="margin: 0;"> <span id="LC839" class="line" lang="haskell"> <span class="n" style="color: #333;">setFreeRegsR</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">frAllocateReg</span> <span class="n" style="color: #333;">platform</span> <span class="n" style="color: #333;">my_reg</span> <span class="n" style="color: #333;">freeRegs</span></span>
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<li id="e7e32ef13a93a68891f700047f89c45df0e3772d">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d8a84cbc5f3594db4a99c5805f570342aa6041af#e7e32ef13a93a68891f700047f89c45df0e3772d"><strong>compiler/GHC/CmmToAsm/Reg/Linear/Base.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">@@ -138,6 +138,9 @@ data RA_State freeRegs</td>
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<pre style="margin: 0;"> <span id="LC138" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ra_config</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="kt" style="color: #458; font-weight: 600;">NCGConfig</span></span>
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<pre style="margin: 0;"> <span id="LC139" class="line" lang="haskell"></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;">-- | (from,fixup,to) : We inserted fixup code between from and to</span></span>
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<pre style="margin: 0;">-<span id="LC141" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ra_fixups</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">BlockId</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">BlockId</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">BlockId</span><span class="p">)]</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC141" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ra_fixups</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">BlockId</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">BlockId</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">BlockId</span><span class="p">)]</span></span>
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<pre style="margin: 0;">+<span id="LC142" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC143" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Map virtual regs to regs they have been assigned in the past.</span></span>
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<pre style="margin: 0;">+<span id="LC144" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ra_sugg_assig</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RegMap</span> <span class="kt" style="color: #458; font-weight: 600;">Loc</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC145" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC146" class="line" lang="haskell"></span></pre>
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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 GeneralizedNewtypeDeriving #-}</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="cd">-- | Free regs map for PowerPC</span></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.CmmToAsm.Reg.Linear.PPC</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -27,6 +29,9 @@ import Data.Bits</td>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="o" style="font-weight: 600;">!</span><span class="kt" style="color: #458; font-weight: 600;">Word32</span> <span class="o" style="font-weight: 600;">!</span><span class="kt" style="color: #458; font-weight: 600;">Word32</span></span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">deriving</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Show</span> <span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- The Show is used in an ASSERT</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">show</span></span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC35" class="line" lang="haskell"><span class="n" style="color: #333;">noFreeRegs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span></span>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="haskell"><span class="n" style="color: #333;">noFreeRegs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="mi" style="color: #099;">0</span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"></span>
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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 CPP #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE GeneralizedNewtypeDeriving #-}</span></span>
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="cd">-- | Free regs map for SPARC</span></span>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.CmmToAsm.Reg.Linear.SPARC</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -38,6 +39,9 @@ data FreeRegs</td>
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<pre style="margin: 0;"> <span id="LC39" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Show</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC40" class="line" lang="haskell"> <span class="n" style="color: #333;">show</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">showFreeRegs</span></span>
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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC42" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC43" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">showFreeRegs</span></span>
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<pre style="margin: 0;">+<span id="LC44" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"><span class="cd">-- | A reg map where no regs are free to be allocated.</span></span>
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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell"><span class="n" style="color: #333;">noFreeRegs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span></span>
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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell"><span class="n" style="color: #333;">noFreeRegs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="mi" style="color: #099;">0</span> <span class="mi" style="color: #099;">0</span> <span class="mi" style="color: #099;">0</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d8a84cbc5f3594db4a99c5805f570342aa6041af#8fc0cb54eee9a1662a2e0ced10fc6eef66561a72"><strong>compiler/GHC/CmmToAsm/Reg/Linear/State.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 CPP, PatternSynonyms, DeriveFunctor #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE ScopedTypeVariables #-}</span></span>
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="kr" style="font-weight: 600;">if</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">defined</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GHC_LOADED_INTO_GHCI</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE UnboxedTuples #-}</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">@@ -52,7 +53,9 @@ import GHC.Cmm.BlockId</td>
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Platform</span></span>
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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique</span></span>
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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.Supply</span></span>
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<pre style="margin: 0;">+<span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.FM</span></span>
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<pre style="margin: 0;"> <span id="LC57" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC58" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Applicative</span></span>
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<pre style="margin: 0;"> <span id="LC59" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">ap</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC60" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC61" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Avoids using unboxed tuples when loading into GHCi</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -111,7 +114,8 @@ runR config block_assig freeregs assig stack us thing =</td>
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<pre style="margin: 0;"> <span id="LC114" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ra_us</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">us</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;">ra_spills</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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<pre style="margin: 0;"> <span id="LC116" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ra_config</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">config</span></span>
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<pre style="margin: 0;">-<span id="LC114" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ra_fixups</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="p">})</span></span>
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<pre style="margin: 0;">+<span id="LC117" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ra_fixups</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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<pre style="margin: 0;">+<span id="LC118" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">ra_sugg_assig</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">assig</span> <span class="p">})</span></span>
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<pre style="margin: 0;"> <span id="LC119" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC120" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">RA_Result</span> <span class="n" style="color: #333;">state</span> <span class="n" style="color: #333;">returned_thing</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="p">(</span><span class="n" style="color: #333;">ra_blockassig</span> <span class="n" style="color: #333;">state</span><span class="p">,</span> <span class="n" style="color: #333;">ra_stack</span> <span class="n" style="color: #333;">state</span><span class="p">,</span> <span class="n" style="color: #333;">makeRAStats</span> <span class="n" style="color: #333;">state</span><span class="p">,</span> <span class="n" style="color: #333;">returned_thing</span><span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -157,6 +161,24 @@ setAssigR :: RegMap Loc -> RegM freeRegs ()</td>
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<pre style="margin: 0;"> <span id="LC161" class="line" lang="haskell"><span class="n" style="color: #333;">setAssigR</span> <span class="n" style="color: #333;">assig</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">RegM</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;"> <span id="LC162" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">RA_Result</span> <span class="n" style="color: #333;">s</span><span class="p">{</span><span class="n" style="color: #333;">ra_assig</span><span class="o" style="font-weight: 600;">=</span><span class="n" style="color: #333;">assig</span><span class="p">}</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;"> <span id="LC163" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC164" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- findVirtRegAny :: forall freeRegs u. Uniquable u</span></span>
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<pre style="margin: 0;">+<span id="LC165" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- => u -> RegM freeRegs (Maybe Loc)</span></span>
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166
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<pre style="margin: 0;">+<span id="LC166" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- findVirtRegAny vreg = do</span></span>
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<pre style="margin: 0;">+<span id="LC167" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- bassig <- getBlockAssigR :: RegM freeRegs (BlockMap (freeRegs,RegMap Loc))</span></span>
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168
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<pre style="margin: 0;">+<span id="LC168" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- return $ foldr (findVirtRegAssig) Nothing bassig</span></span>
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169
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<pre style="margin: 0;">+<span id="LC169" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- where</span></span>
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170
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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- findVirtRegAssig :: (freeRegs,RegMap Loc) -> Maybe Loc -> Maybe Loc</span></span>
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171
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<pre style="margin: 0;">+<span id="LC171" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- findVirtRegAssig assig z =</span></span>
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172
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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- lookupUFM (snd assig) vreg <|> z</span></span>
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173
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<pre style="margin: 0;">+<span id="LC173" class="line" lang="haskell"></span>
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174
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<pre style="margin: 0;">+<span id="LC174" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- suggestAssig :: RegMap Loc -> RegM ()</span></span>
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175
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<pre style="margin: 0;">+<span id="LC175" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- suggestAssig assig = RegM $ \ s -></span></span>
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176
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<pre style="margin: 0;">+<span id="LC176" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- RA_Result s{ra_sugg_assig=plusUFM (ra_sugg_assig s) assig} ()</span></span>
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177
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<pre style="margin: 0;">+<span id="LC177" class="line" lang="haskell"></span>
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178
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<pre style="margin: 0;">+<span id="LC178" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- getSug :: Unique -> RegM Loc</span></span>
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179
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<pre style="margin: 0;">+<span id="LC179" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- getSug = RegM $ \ s@RA_State{ra_sugg_assig = sugg_assig} -></span></span>
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180
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<pre style="margin: 0;">+<span id="LC180" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- RA_Result s sugg_assig</span></span>
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181
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<pre style="margin: 0;">+<span id="LC181" class="line" lang="haskell"></span>
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160
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182
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<pre style="margin: 0;"> <span id="LC182" class="line" lang="haskell"><span class="n" style="color: #333;">getBlockAssigR</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RegM</span> <span class="n" style="color: #333;">freeRegs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">BlockAssignment</span> <span class="n" style="color: #333;">freeRegs</span><span class="p">)</span></span>
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161
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183
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<pre style="margin: 0;"> <span id="LC183" class="line" lang="haskell"><span class="n" style="color: #333;">getBlockAssigR</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">RegM</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;">s</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">RA_State</span><span class="p">{</span><span class="n" style="color: #333;">ra_blockassig</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">assig</span><span class="p">}</span> <span class="o" style="font-weight: 600;">-></span></span>
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162
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184
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<pre style="margin: 0;"> <span id="LC184" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">RA_Result</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">assig</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d8a84cbc5f3594db4a99c5805f570342aa6041af#8a5d5b6d1415946cdbebc680a0c9d26ebca2a497"><strong>compiler/GHC/CmmToAsm/Reg/Linear/X86.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 GeneralizedNewtypeDeriving #-}</span></span>
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2
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<pre style="margin: 0;"> <span id="LC2" class="line" lang="haskell"></span>
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2
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell"><span class="cd">-- | Free regs map for i386</span></span>
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3
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4
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.CmmToAsm.Reg.Linear.X86</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -9,12 +10,13 @@ import GHC.Platform.Reg.Class</td>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Platform.Reg</span></span>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Panic</span></span>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Platform</span></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Outputable</span></span>
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Word</span></span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Bits</span></span>
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="kt" style="color: #458; font-weight: 600;">Word32</span></span>
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<pre style="margin: 0;">-<span id="LC17" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Show</span></span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">deriving</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Show</span></span><span class="p"><span class="idiff">,</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Outputable</span></span><span class="p"><span class="idiff right">)</span></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="n" style="color: #333;">noFreeRegs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"><span class="n" style="color: #333;">noFreeRegs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="mi" style="color: #099;">0</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d8a84cbc5f3594db4a99c5805f570342aa6041af#c2a3ab492c92cc765c97d9d8a6537aacdd65f1f9"><strong>compiler/GHC/CmmToAsm/Reg/Linear/X86_64.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 GeneralizedNewtypeDeriving #-}</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="cd">-- | Free regs map for x86_64</span></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.CmmToAsm.Reg.Linear.X86_64</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -9,12 +10,13 @@ import GHC.Platform.Reg.Class</td>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Platform.Reg</span></span>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Panic</span></span>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Platform</span></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Outputable</span></span>
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Word</span></span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Bits</span></span>
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="kt" style="color: #458; font-weight: 600;">Word64</span></span>
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<pre style="margin: 0;">-<span id="LC17" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Show</span></span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">deriving</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Show</span></span><span class="p"><span class="idiff">,</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Outputable</span></span><span class="p"><span class="idiff right">)</span></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="n" style="color: #333;">noFreeRegs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"><span class="n" style="color: #333;">noFreeRegs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">FreeRegs</span> <span class="mi" style="color: #099;">0</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d8a84cbc5f3594db4a99c5805f570342aa6041af#7cb0c3b8a55988740abfeec25509f3897dd73950"><strong>compiler/utils/Outputable.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">@@ -847,6 +847,9 @@ instance Outputable Word16 where</td>
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<pre style="margin: 0;"> <span id="LC847" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">Word32</span> <span class="kr" style="font-weight: 600;">where</span></span>
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848
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<pre style="margin: 0;"> <span id="LC848" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">integer</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">fromIntegral</span> <span class="n" style="color: #333;">n</span></span>
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849
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849
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<pre style="margin: 0;"> <span id="LC849" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC850" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">Word64</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC851" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">integer</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">fromIntegral</span> <span class="n" style="color: #333;">n</span></span>
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<pre style="margin: 0;">+<span id="LC852" class="line" lang="haskell"></span>
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853
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<pre style="margin: 0;"> <span id="LC853" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">Word</span> <span class="kr" style="font-weight: 600;">where</span></span>
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851
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854
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<pre style="margin: 0;"> <span id="LC854" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">integer</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">fromIntegral</span> <span class="n" style="color: #333;">n</span></span>
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852
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855
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<pre style="margin: 0;"> <span id="LC855" class="line" lang="haskell"></span>
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