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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Failure to optimize code converted to memset call into tail call"
href="https://bugs.llvm.org/show_bug.cgi?id=48508">48508</a>
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<th>Summary</th>
<td>Failure to optimize code converted to memset call into tail call
</td>
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<th>Product</th>
<td>libraries
</td>
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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>Scalar Optimizations
</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>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>void f(char *d, size_t c)
{
while (c-- > 0)
*d++ = 0;
}
This code can be optimized to using `memset`. It can also be further optimize
to optimize out the call to `memset` to a tail call. This transformation is
done by GCC, but not by LLVM.
Comparison here : <a href="https://godbolt.org/z/sjP8P8">https://godbolt.org/z/sjP8P8</a></pre>
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