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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - New Pass Manager: LoopUnswitch requires Divergence Analysis to work correctly"
href="https://bugs.llvm.org/show_bug.cgi?id=48819">48819</a>
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<th>Summary</th>
<td>New Pass Manager: LoopUnswitch requires Divergence Analysis to work correctly
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<th>Product</th>
<td>libraries
</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
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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>Loop Optimizer
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>sameer.sahasrabuddhe@amd.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>The loop-unswitch transform should not be performed on a loop whose condition
is divergent. For this to happen correctly, divergence analysis must be
available. The existing divergence analysis has not been ported to the new pass
manager yet. As a result, loop unswitching on the new pass manager is currently
unsafe on targets that care about divergence.
The following lit test for opt currently fails with the new pass manager:
LLVM :: CodeGen/AMDGPU/amdgpu-inline.ll</pre>
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