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<h3>
Andreas Klebinger pushed to branch wip/andreask/exprSizeBangs
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d1dae72ee1b62054d8056d32578d222550f047b7">d1dae72e</a></strong>
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<span>by Andreas Klebinger</span>
<i>at 2020-07-14T16:15:54+02:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Make sizeExpr strict in the size threshold to facilitate WW.
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<h4>1 changed file:</h4>
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<a href="#2811a7297b8aa206197ac1f5dabd0818e3c7ec5a">
compiler/GHC/Core/Unfold.hs
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<h4>Changes:</h4>
<li id="2811a7297b8aa206197ac1f5dabd0818e3c7ec5a">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d1dae72ee1b62054d8056d32578d222550f047b7#2811a7297b8aa206197ac1f5dabd0818e3c7ec5a"><strong>compiler/GHC/Core/Unfold.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">@@ -16,6 +16,7 @@ find, unsurprisingly, a Core expression.</td>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC18" 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="LC19" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE BangPatterns #-}</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="cp" style="color: #999; font-weight: 600;">{-# OPTIONS_GHC -Wno-incomplete-record-updates #-}</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="612" style="width: 35px; color: rgba(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">@@ -612,7 +613,9 @@ sizeExpr :: DynFlags</td>
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613
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<pre style="margin: 0;"> <span id="LC613" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC614" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note [Computing the size of an expression]</span></span>
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<pre style="margin: 0;"> <span id="LC615" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC615" class="line" lang="haskell"><span class="n" style="color: #333;">sizeExpr</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">bOMB_OUT_SIZE</span> <span class="n" style="color: #333;">top_args</span> <span class="n" style="color: #333;">expr</span></span>
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<pre style="margin: 0;">+<span id="LC616" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Forcing bOMB_OUT_SIZE early prevents repeated</span></span>
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<td class="diff-line-num new new_line" data-linenumber="617" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC617" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- unboxing of the Int argument.</span></span>
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<pre style="margin: 0;">+<span id="LC618" class="line" lang="haskell"><span class="n" style="color: #333;">sizeExpr</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">bOMB_OUT_SIZE</span> <span class="n" style="color: #333;">top_args</span> <span class="n" style="color: #333;">expr</span></span>
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619
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<pre style="margin: 0;"> <span id="LC619" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">size_up</span> <span class="n" style="color: #333;">expr</span></span>
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617
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<pre style="margin: 0;"> <span id="LC620" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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618
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621
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<pre style="margin: 0;"> <span id="LC621" class="line" lang="haskell"> <span class="n" style="color: #333;">size_up</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">size_up</span> <span class="n" style="color: #333;">e</span></span>
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