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<body><span class="vcard"><a class="email" href="mailto:rnk@google.com" title="Reid Kleckner <rnk@google.com>"> <span class="fn">Reid Kleckner</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - Bug destroying data in utils/TableGen/CodeGenDAGPatterns.cpp"
href="https://bugs.llvm.org/show_bug.cgi?id=48054">bug 48054</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>DUPLICATE
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<tr>
<td style="text-align:right;">Status</td>
<td>NEW
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<td>RESOLVED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - Bug destroying data in utils/TableGen/CodeGenDAGPatterns.cpp"
href="https://bugs.llvm.org/show_bug.cgi?id=48054#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED DUPLICATE - Bug destroying data in utils/TableGen/CodeGenDAGPatterns.cpp"
href="https://bugs.llvm.org/show_bug.cgi?id=48054">bug 48054</a>
from <span class="vcard"><a class="email" href="mailto:rnk@google.com" title="Reid Kleckner <rnk@google.com>"> <span class="fn">Reid Kleckner</span></a>
</span></b>
<pre>I think this is <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Crash when using LLVM10 built with MSVC for x86-32 Debug"
href="show_bug.cgi?id=46176">https://bugs.llvm.org/show_bug.cgi?id=46176</a>
It looks like the build is 32-bit, judging by the width of the hex pointers in
the stack trace. Debug is the default CMake config, so that's probably in play
too.
It's an MSVC bug:
<a href="https://developercommunity.visualstudio.com/content/problem/1179643/msvc-copies-overaligned-non-trivially-copyable-par.html">https://developercommunity.visualstudio.com/content/problem/1179643/msvc-copies-overaligned-non-trivially-copyable-par.html</a>
MSVC passes SmallVector by value incorrectly in this config. ¯\_(ツ)_/¯
We landed a workaround, but I don't think it's in LLVM 10:
<a href="http://github.com/llvm/llvm-project/commit/4e3edef4b8b637c0c76897497eb7c66f00157210">http://github.com/llvm/llvm-project/commit/4e3edef4b8b637c0c76897497eb7c66f00157210</a>
*** This bug has been marked as a duplicate of <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Crash when using LLVM10 built with MSVC for x86-32 Debug"
href="show_bug.cgi?id=46176">bug 46176</a> ***</pre>
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