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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - DAGCombiner::MatchBswapHword logic is wrong for OR trees"
href="https://llvm.org/bugs/show_bug.cgi?id=31357">31357</a>
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<th>Summary</th>
<td>DAGCombiner::MatchBswapHword logic is wrong for OR trees
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>Linux
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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
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>jlewis@knupath.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=17750" name="attach_17750" title="Fix to DAGCombiner.cpp and two new unit test files">attachment 17750</a> <a href="attachment.cgi?id=17750&action=edit" title="Fix to DAGCombiner.cpp and two new unit test files">[details]</a></span>
Fix to DAGCombiner.cpp and two new unit test files
The existing code only looks at half of the tree when matching bswap + rol
patterns ending in an OR tree (as opposed to a cascade).
Proposed patch with test coverage is attached</pre>
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