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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [guards] GVN/NewGVN should propagate guard conditions"
href="https://llvm.org/bugs/show_bug.cgi?id=31523">31523</a>
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<th>Summary</th>
<td>[guards] GVN/NewGVN should propagate guard conditions
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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>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
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<th>Component</th>
<td>Scalar Optimizations
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>listmail@philipreames.com
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</tr>
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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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<p>
<div>
<pre>GVN currently does not have any handling for the llvm.experimental.guard
intrinsics. It does support assumes. We should extend the handling to
propagate equalities from guards as well.
As a trivial example:
guard (a != null);
...
guard (a != null); // can be removed
Note that we also need to add the same handling to the new memory SSA based
NewGVN.</pre>
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