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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Missing copysign(1., x) < 0. to std::signbit(x) fold"
href="https://bugs.llvm.org/show_bug.cgi?id=49179">49179</a>
</td>
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<th>Summary</th>
<td>Missing copysign(1., x) < 0. to std::signbit(x) fold
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
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<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>nok.raven@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>#include <cmath>
bool foo(double x)
{
return std::copysign(1., x) < 0.;
}
bool bar(double x)
{
return std::signbit(x);
}
<a href="https://godbolt.org/z/xPMzj9">https://godbolt.org/z/xPMzj9</a></pre>
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