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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - AVX512F crashes lowering anyext from i1 to i64"
href="https://llvm.org/bugs/show_bug.cgi?id=28173">28173</a>
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<th>Summary</th>
<td>AVX512F crashes lowering anyext from i1 to i64
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: X86
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>mkuper@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>long long bar();
long long foo(bool i, int j) {
if (j)
return bar();
return i | (-1ULL - 1);
}
When compiling with -mavx512f, we get:
fatal error: error in backend: Cannot select: 0x417f800: i64 = any_extend
0x4181c10
0x4181c10: i1,ch = CopyFromReg 0x4106ec0, Register:i1 %vreg2
0x4182200: i1 = Register %vreg2</pre>
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