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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Missing FP optimization opportunities for fcmp ord operations"
href="https://bugs.llvm.org/show_bug.cgi?id=49831">49831</a>
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<th>Summary</th>
<td>Missing FP optimization opportunities for fcmp ord operations
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>juneyoung.lee@sf.snu.ac.kr
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>; Excerpted from llvm/test/Transforms/InstCombine/and-fcmp.ll
```
$ cat src.ll
define i1 @PR41069_commute_logical(i1 %z, float %c, float %d) {
%ord1 = fcmp ninf ord float %c, 0.0
%and = select i1 %ord1, i1 %z, i1 false
%ord2 = fcmp ninf reassoc ord float %d, 0.0
%r = select i1 %ord2, i1 %and, i1 false
ret i1 %r
}
```
This can be optimized to
```
%c.fr = freeze float %c
%ord1 = fcmp ord float %c.fr, %d
%r = select i1 %ord1, i1 %z, i1 false
```
Alive2 link: <a href="https://alive2.llvm.org/ce/z/QfkJak">https://alive2.llvm.org/ce/z/QfkJak</a></pre>
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