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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Failure to optimize division by abs(x) to sign check"
href="https://bugs.llvm.org/show_bug.cgi?id=45972">45972</a>
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<th>Summary</th>
<td>Failure to optimize division by abs(x) to sign check
</td>
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<th>Product</th>
<td>libraries
</td>
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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>Linux
</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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<th>Reporter</th>
<td>gabravier@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>int f(int c)
{
if (c != 0)
c /= abs(c);
return c;
}
This can be optimized to something like `c ? (c >> 31) | 1 : c` (I think). This
transformation is done by GCC, but not by LLVM.</pre>
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