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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - llvm.masked.gather not creating optimal code on haswell for avx2"
href="https://bugs.llvm.org/show_bug.cgi?id=43643">43643</a>
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<th>Summary</th>
<td>llvm.masked.gather not creating optimal code on haswell for avx2
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<th>Product</th>
<td>libraries
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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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>deepak.rajendrakumaran@intel.com
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<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, spatel+llvm@rotateright.com
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<pre>I have 2 separate IR implementations below. One using llvm.masked.gather and
the other using avx2.gather. The generic masked gather doesn't use the vector
gather. If the cpu is explicitly chosen as skylake(anything after haswwell),
vector gather is used.
<a href="https://godbolt.org/z/EFmBdx">https://godbolt.org/z/EFmBdx</a></pre>
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