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Marge Bot pushed to branch master at <a href="https://gitlab.haskell.org/ghc/ghc" style="color: #1068bf;">Glasgow Haskell Compiler / GHC</a>
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Commits:
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<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/552b7908d8703e9478cee418721b311e033391dc" style="color: #1068bf;">552b7908</a></strong>
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<span> by Ben Gamari </span> <i> at 2022-12-15T03:55:15-05:00 </i>
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<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>compiler: Ensure that MutVar operations have necessary barriers
Here we add acquire and release barriers in readMutVar# and
writeMutVar#, which are necessary for soundness.
Fixes #22468.
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compiler/GHC/StgToCmm/Prim.hs
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Changes:
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/552b7908d8703e9478cee418721b311e033391dc#d12a108e34fe83acc9c99357ae841e22a0af0a23" style="color: #1068bf;"><strong style="font-weight: bold;">compiler/GHC/StgToCmm/Prim.hs</strong></a>
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<td class="line_content match" style="color: rgba(0,0,0,0.3); padding: inherit;" bgcolor="#fafafa">@@ -283,9 +283,10 @@ emitPrimOp cfg primop =</td>
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<td class="old_line diff-line-num" data-linenumber="283" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
283
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<td class="new_line diff-line-num" data-linenumber="283" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
283
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC283" class="line" lang="haskell"> <span class="n" style="color: #333;">emitAssign</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CmmLocal</span> <span class="n" style="color: #333;">res</span><span class="p">)</span> <span class="n" style="color: #333;">currentTSOExpr</span></span>
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284
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<td class="new_line diff-line-num" data-linenumber="284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
284
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC284" class="line" lang="haskell"></span>
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<td class="old_line diff-line-num" data-linenumber="285" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
285
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<td class="new_line diff-line-num" data-linenumber="285" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
285
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC285" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ReadMutVarOp</span> <span class="o" style="font-weight: 600;">-></span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">mutv</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">opIntoRegs</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">res</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span></span>
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<td class="old_line diff-line-num old" data-linenumber="286" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
286
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<td class="new_line diff-line-num old" data-linenumber="286" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding: inherit;" bgcolor="#fbe9eb"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'>-<span id="LC286" class="line" lang="haskell"> <span class="n" style="color: #333;">emitAssign</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CmmLocal</span> <span class="n" style="color: #333;">res</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">cmmLoadIndexW</span> <span class="n" style="color: #333;">platform</span> <span class="n" style="color: #333;">mutv</span> <span class="p">(</span><span class="n" style="color: #333;">fixedHdrSizeW</span> <span class="n" style="color: #333;">profile</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">gcWord</span> <span class="n" style="color: #333;">platform</span><span class="p">))</span></span>
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<td class="old_line diff-line-num new" data-linenumber="287" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
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<td class="new_line diff-line-num new" data-linenumber="286" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
286
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'>+<span id="LC286" class="line" lang="haskell"> <span class="n" style="color: #333;">emitPrimCall</span> <span class="p">[</span><span class="n" style="color: #333;">res</span><span class="p">]</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MO_AtomicRead</span> <span class="p">(</span><span class="n" style="color: #333;">wordWidth</span> <span class="n" style="color: #333;">platform</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">MemOrderAcquire</span><span class="p">)</span></span>
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<td class="new_line diff-line-num new" data-linenumber="287" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
287
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'>+<span id="LC287" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">cmmOffsetW</span> <span class="n" style="color: #333;">platform</span> <span class="n" style="color: #333;">mutv</span> <span class="p">(</span><span class="n" style="color: #333;">fixedHdrSizeW</span> <span class="n" style="color: #333;">profile</span><span class="p">)</span> <span class="p">]</span></span>
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287
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<td class="new_line diff-line-num" data-linenumber="288" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
288
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC288" class="line" lang="haskell"></span>
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<td class="old_line diff-line-num old" data-linenumber="288" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
288
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<td class="new_line diff-line-num old" data-linenumber="289" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding: inherit;" bgcolor="#fbe9eb"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'>-<span id="LC288" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">WriteMutVarOp</span> <span class="o" style="font-weight: 600;">-></span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">mutv</span><span class="p">,</span> <span class="n" style="color: #333;">var</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">opIntoRegs</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;"><span class="idiff left deletion" style="background-color: #fac5cd;">res</span></span><span class="o" style="font-weight: 600;"><span class="idiff right deletion" style="background-color: #fac5cd;">@</span></span><span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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<td class="new_line diff-line-num new" data-linenumber="289" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
289
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'>+<span id="LC289" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">WriteMutVarOp</span> <span class="o" style="font-weight: 600;">-></span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">[</span><span class="n" style="color: #333;">mutv</span><span class="p">,</span> <span class="n" style="color: #333;">var</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">opIntoRegs</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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<td class="new_line diff-line-num" data-linenumber="290" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
290
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC290" class="line" lang="haskell"> <span class="n" style="color: #333;">old_val</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kt" style="color: #458; font-weight: 600;">CmmLocal</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">newTemp</span> <span class="p">(</span><span class="n" style="color: #333;">cmmExprType</span> <span class="n" style="color: #333;">platform</span> <span class="n" style="color: #333;">var</span><span class="p">)</span></span>
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<td class="new_line diff-line-num" data-linenumber="291" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
291
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC291" class="line" lang="haskell"> <span class="n" style="color: #333;">emitAssign</span> <span class="n" style="color: #333;">old_val</span> <span class="p">(</span><span class="n" style="color: #333;">cmmLoadIndexW</span> <span class="n" style="color: #333;">platform</span> <span class="n" style="color: #333;">mutv</span> <span class="p">(</span><span class="n" style="color: #333;">fixedHdrSizeW</span> <span class="n" style="color: #333;">profile</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">gcWord</span> <span class="n" style="color: #333;">platform</span><span class="p">))</span></span>
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC292" class="line" lang="haskell"></span>
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<td class="line_content match" style="color: rgba(0,0,0,0.3); padding: inherit;" bgcolor="#fafafa">@@ -294,8 +295,8 @@ emitPrimOp cfg primop =</td>
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294
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<td class="new_line diff-line-num" data-linenumber="295" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
295
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC295" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Note that this also must come after we read the old value to ensure</span></span>
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295
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<td class="new_line diff-line-num" data-linenumber="296" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
296
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC296" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- that the read of old_val comes before another core's write to the</span></span>
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296
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<td class="new_line diff-line-num" data-linenumber="297" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
297
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC297" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- MutVar's value.</span></span>
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<td class="old_line diff-line-num old" data-linenumber="297" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
297
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<td class="new_line diff-line-num old" data-linenumber="298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding: inherit;" bgcolor="#fbe9eb"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'>-<span id="LC297" class="line" lang="haskell"> <span class="n" style="color: #333;">emitPrimCall</span> <span class="n" style="color: #333;"><span class="idiff left deletion" style="background-color: #fac5cd;">res</span></span><span class="idiff deletion" style="background-color: #fac5cd;"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff deletion" style="background-color: #fac5cd;">MO_WriteBarrier</span></span><span class="idiff deletion" style="background-color: #fac5cd;"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right deletion" style="background-color: #fac5cd;">[]</span></span></span>
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<td class="old_line diff-line-num old" data-linenumber="298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
298
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<td class="new_line diff-line-num old" data-linenumber="298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: inherit;" align="right" bgcolor="#f9d7dc">
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<td class="line_content old" style="padding: inherit;" bgcolor="#fbe9eb"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'>-<span id="LC298" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left deletion" style="background-color: #fac5cd;">emitStore</span></span><span class="idiff deletion" style="background-color: #fac5cd;"> </span><span class="p"><span class="idiff deletion" style="background-color: #fac5cd;">(</span></span><span class="n" style="color: #333;">cmmOffsetW</span> <span class="n" style="color: #333;">platform</span> <span class="n" style="color: #333;">mutv</span> <span class="p">(</span><span class="n" style="color: #333;">fixedHdrSizeW</span> <span class="n" style="color: #333;">profile</span><span class="p">)<span class="idiff right deletion" style="background-color: #fac5cd;">)</span></span> <span class="n" style="color: #333;">var</span></span>
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<td class="old_line diff-line-num new" data-linenumber="299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
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<td class="new_line diff-line-num new" data-linenumber="298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
298
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'>+<span id="LC298" class="line" lang="haskell"> <span class="n" style="color: #333;">emitPrimCall</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left addition" style="background-color: #c7f0d2;">[]</span></span><span class="idiff addition" style="background-color: #c7f0d2;"> </span><span class="p"><span class="idiff addition" style="background-color: #c7f0d2;">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff addition" style="background-color: #c7f0d2;">MO_AtomicWrite</span></span><span class="idiff addition" style="background-color: #c7f0d2;"> </span><span class="p"><span class="idiff addition" style="background-color: #c7f0d2;">(</span></span><span class="n" style="color: #333;"><span class="idiff addition" style="background-color: #c7f0d2;">wordWidth</span></span><span class="idiff addition" style="background-color: #c7f0d2;"> </span><span class="n" style="color: #333;"><span class="idiff addition" style="background-color: #c7f0d2;">platform</span></span><span class="p"><span class="idiff addition" style="background-color: #c7f0d2;">)</span></span><span class="idiff addition" style="background-color: #c7f0d2;"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff addition" style="background-color: #c7f0d2;">MemOrderRelease</span></span><span class="p"><span class="idiff right addition" style="background-color: #c7f0d2;">)</span></span></span>
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<td class="new_line diff-line-num new" data-linenumber="299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: inherit;" align="right" bgcolor="#ddfbe6">
299
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<td class="line_content new" style="padding: inherit;" bgcolor="#ecfdf0"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'>+<span id="LC299" class="line" lang="haskell"> <span class="idiff left addition" style="background-color: #c7f0d2;"> </span><span class="p"><span class="idiff addition" style="background-color: #c7f0d2;">[</span></span><span class="idiff addition" style="background-color: #c7f0d2;"> </span><span class="n" style="color: #333;">cmmOffsetW</span> <span class="n" style="color: #333;">platform</span> <span class="n" style="color: #333;">mutv</span> <span class="p">(</span><span class="n" style="color: #333;">fixedHdrSizeW</span> <span class="n" style="color: #333;">profile</span><span class="p">)<span class="idiff addition" style="background-color: #c7f0d2;">,</span></span> <span class="n" style="color: #333;">var</span><span class="idiff addition" style="background-color: #c7f0d2;"> </span><span class="p"><span class="idiff right addition" style="background-color: #c7f0d2;">]</span></span></span>
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299
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<td class="new_line diff-line-num" data-linenumber="300" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
300
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC300" class="line" lang="haskell"></span>
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300
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<td class="new_line diff-line-num" data-linenumber="301" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
301
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC301" 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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301
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<td class="new_line diff-line-num" data-linenumber="302" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: inherit;" align="right" bgcolor="#fafafa">
302
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<td class="line_content" style="padding: inherit;"><pre style='display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: inherit; border-radius: 2px; margin: 0; padding: 0; border: inherit solid #dbdbdb;'> <span id="LC302" class="line" lang="haskell"> <span class="n" style="color: #333;">mkdirtyMutVarCCall</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getCode</span> <span class="o" style="font-weight: 600;">$!</span> <span class="n" style="color: #333;">emitCCall</span></span>
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