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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Failure to use vfmadd132sd when appropriate"
href="https://bugs.llvm.org/show_bug.cgi?id=46079">46079</a>
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<th>Summary</th>
<td>Failure to use vfmadd132sd when appropriate
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
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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
</td>
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<th>Severity</th>
<td>enhancement
</td>
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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
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<th>Reporter</th>
<td>gabravier@gmail.com
</td>
</tr>
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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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<p>
<div>
<pre>double f(double a, double b, double c)
{
return a * b + c;
}
When compiled with `-O3 -mavx512f`, GCC produces this :
f(double, double, double):
vfmadd132sd xmm0, xmm2, xmm1
ret
Clang produces this :
f(double, double, double): # @f(double, double, double)
vmulsd xmm0, xmm0, xmm1
vaddsd xmm0, xmm0, xmm2
ret</pre>
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