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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Merging alias.scope metadata should create a union, not an intersection"
href="http://llvm.org/bugs/show_bug.cgi?id=22507">22507</a>
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<th>Summary</th>
<td>Merging alias.scope metadata should create a union, not an intersection
</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
</td>
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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>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Blocks</th>
<td>22374
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
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<pre>The alias.scope metadata represents sets of things an instruction might alias
with, when combining the metadata from two instructions the resulting metadata
must be the union of the original sets, because the new instruction might alias
with anything any of the original instructions aliased with.
Since the scoped alias metadata is new in 3.6 and things like function inlining
automatically generate such metadata, I consider this a regression.
Fix at <a href="http://reviews.llvm.org/D7490">http://reviews.llvm.org/D7490</a></pre>
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