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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 --- - AVX512: unable to select vcvtps2ph/ph2ps from fpext/fptrunc" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23941&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=9fJYKuO_LntQv_B9L1eO2C9wHARfZzL6bn0qzIculUM&s=cCnCQyc1FwxpPMPv3MDLHkVVii5tRvZWY5QzQsHxvFQ&e=">23941</a>
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<th>Summary</th>
<td>AVX512: unable to select vcvtps2ph/ph2ps from fpext/fptrunc
</td>
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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>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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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>ahmed.bougacha@gmail.com
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>This fails to select the native instructions with +avx512f,-f16c:
define float @test_extend32(half* %addr) {
%val16 = load half, half* %addr
%val32 = fpext half %val16 to float
ret float %val32
}
When users specify -mavx512f without any CPU (so without specifying F16C), this
means we'll get the libcalls instead of the cvt instructions, because of the
hasF16C() checks guarding legality.</pre>
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