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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [X86][AVX512] Should KSHIFT map to X86ISD::VSHLI and VSRLI ?"
href="https://llvm.org/bugs/show_bug.cgi?id=31223">31223</a>
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<th>Summary</th>
<td>[X86][AVX512] Should KSHIFT map to X86ISD::VSHLI and VSRLI ?
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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>Windows NT
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
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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>llvm-dev@redking.me.uk
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<th>CC</th>
<td>craig.topper@gmail.com, elena.demikhovsky@intel.com, llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
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<pre>X86ISD::VSHLI and VSRLI are for vector shifts within elements but kshift (<X x
i1> mask register types) uses it as a vector element shift (which is closer to
X86ISD::VSHLDQ and VSRLDQ).
So we see shifts such as X86ISD::VSHLI/VSRLI <16 x i1>, #8
This was encountered when I began looking at better VSHLI/VSRLI combining.</pre>
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