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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - AVX512 mask8 miscompilation"
href="https://bugs.llvm.org/show_bug.cgi?id=45736">45736</a>
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<th>Summary</th>
<td>AVX512 mask8 miscompilation
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</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>normal
</td>
</tr>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>lopresti@gmail.com
</td>
</tr>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23424" name="attach_23424" title="Test case for -O3 -march=skylake-avx512">attachment 23424</a> <a href="attachment.cgi?id=23424&action=edit" title="Test case for -O3 -march=skylake-avx512">[details]</a></span>
Test case for -O3 -march=skylake-avx512
I have tested with 10.0 and trunk as of this morning.
Compile the attached program with "clang -O3 -march=skylake-avx512" and run it.
Both assertions should pass (and they do on GCC and IC18), but the second
assertion fails.
The assembly is pretty clearly bogus; see <a href="https://godbolt.org/z/ABnLNc">https://godbolt.org/z/ABnLNc</a>. There
should be one kmovb, not two, and neither one should be accessing masks[idx+4].</pre>
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