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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - -sin(-x) -> sin(x)"
href="https://bugs.llvm.org/show_bug.cgi?id=38458">38458</a>
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<th>Summary</th>
<td>-sin(-x) -> sin(x)
</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>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>david.bolvansky@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>-sin(-x) can be simplified to sin(x)
double sinrev(double x)
{
return -sin(-x);
}
Current code gen:
sinrev(double):
push rax
xorps xmm0, xmmword ptr [rip + .LCPI0_0]
call sin
xorps xmm0, xmmword ptr [rip + .LCPI0_0]
pop rax
ret</pre>
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