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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Backend should be able to unfold masked merge"
href="https://bugs.llvm.org/show_bug.cgi?id=37104">37104</a>
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<th>Summary</th>
<td>Backend should be able to unfold masked merge
</td>
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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
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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>Backend: X86
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>lebedev.ri@gmail.com
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</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
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<pre>Moving the disscussion from <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [instcombine, sha] Add Instruction Fold for Masked Merge"
href="show_bug.cgi?id=6773#c9">https://bugs.llvm.org/show_bug.cgi?id=6773#c9</a>
That ^ will introduce IR canonicalization, which is likely suboptimal for the
final assembly.
I'm guessing the backend (what specifically?) should be able to undo it:
<a href="https://rise4fun.com/Alive/HqI">https://rise4fun.com/Alive/HqI</a>
<a href="https://godbolt.org/g/skwsvY">https://godbolt.org/g/skwsvY</a></pre>
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</p>
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