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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - WQM handling misses VCC dependencies"
href="https://llvm.org/bugs/show_bug.cgi?id=28694">28694</a>
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<th>Summary</th>
<td>WQM handling misses VCC dependencies
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Backend: AMDGPU
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>nhaehnle@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Sometimes, uniform branch conditions are lowered to VALU comparisons, e.g.
v_cmp_lt vcc, N, v0
s_cbranch_vccnz BB
The fact that v0 can require WQM conditions isn't picked up, which can lead to
GPU hangs.
Candidate fix is at <a href="https://reviews.llvm.org/D22673">https://reviews.llvm.org/D22673</a></pre>
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