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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Infinite Loop in InstCombine when Volatile memcpy are Present"
href="https://bugs.llvm.org/show_bug.cgi?id=51273">51273</a>
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<th>Summary</th>
<td>Infinite Loop in InstCombine when Volatile memcpy are Present
</td>
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<th>Product</th>
<td>tools
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>opt
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<th>Assignee</th>
<td>tstellar@redhat.com
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<th>Reporter</th>
<td>mohammad.fawaz@intel.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
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<pre>This issues started happening after
<a href="https://github.com/llvm/llvm-project/commit/b373b5990d5991a920c421b21a352e4ccf4c4993">https://github.com/llvm/llvm-project/commit/b373b5990d5991a920c421b21a352e4ccf4c4993</a>
Basically, if the memcpy is volatile, the collectUsers() function should return
false, just like we do for volatile loads.
The fix just got merged into trunk:
<a href="https://github.com/llvm/llvm-project/commit/b4d945bacdaf2c60dd5fdb119b90cced73c41beb">https://github.com/llvm/llvm-project/commit/b4d945bacdaf2c60dd5fdb119b90cced73c41beb</a>
The request here is to also merge the change on the 13.x branch. I believe the
first change mentioned above is already on the 13.x branch.
Thanks!</pre>
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