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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [AVX512] Cannot select: intrinsic %llvm.x86.avx512.rndscale.ss"
href="http://llvm.org/bugs/show_bug.cgi?id=20684">20684</a>
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<th>Summary</th>
<td>[AVX512] Cannot select: intrinsic %llvm.x86.avx512.rndscale.ss
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</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>new bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>matt@pharr.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=12907" name="attach_12907" title="test case">attachment 12907</a> <a href="attachment.cgi?id=12907&action=edit" title="test case">[details]</a></span>
test case
I get the following error if I try to compile the attached test-case, which
tries to call the scalar variant of the avx512 rndscale instruction:
% llc -mcpu=knl bug.ll -filetype=asm -o -
.section __TEXT,__text,regular,pure_instructions
.macosx_version_min 13, 3
LLVM ERROR: Cannot select: intrinsic %llvm.x86.avx512.rndscale.ss
%
It's entirely possible that this is user error, but I'm pretty sure I've
deciphered the right declaration of the intrinsic from IntrinsicsX86.td. (There
wasn't a test to confirm I had it right, FWIW.)</pre>
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