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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [SSE] Scalar users should be able to fold MOVZQI2PQIrm/MOVDI2PDIrm"
href="https://llvm.org/bugs/show_bug.cgi?id=23464">23464</a>
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<th>Summary</th>
<td>[SSE] Scalar users should be able to fold MOVZQI2PQIrm/MOVDI2PDIrm
</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>All
</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>Backend: X86
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>ahmed.bougacha@gmail.com
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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</tr></table>
<p>
<div>
<pre>It's trickier than MOVSS/MOVSD because they zero the upper lanes, but if we're
able to recognize that a load feeds into a scalar op (PR23349), this is
probably as easy as canFoldLoad=1 on QI2PQI/DI2PDI.
It's also much less useful, because most integer domain instructions are packed
anyway. There are a few that aren't though; consider:
_mm256_broadcastq_epi64(_mm_loadl_epi64(src))</pre>
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