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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - AA metadata is not properly updated during call slot optimization"
href="http://llvm.org/bugs/show_bug.cgi?id=22501">22501</a>
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<th>Summary</th>
<td>AA metadata is not properly updated during call slot optimization
</td>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>3.6
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>bsteinbr@gmail.com
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Blocks</th>
<td>22374
</td>
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>Call slot optimization might update a call in a way that the set of things it
aliases with changes, but it doesn't update the AA metadata. This can lead to
various misoptimizations later on because of invalid NoAlias results.
We've hit such issues when we updated the LLVM version in the rust compiler to
3.6.
I submitted a patch for this at <a href="http://reviews.llvm.org/D7482">http://reviews.llvm.org/D7482</a></pre>
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