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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Failure to optimize comparison of strlen with 0 on string where operations on it should force the result to be non-0"
href="https://bugs.llvm.org/show_bug.cgi?id=47149">47149</a>
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<th>Summary</th>
<td>Failure to optimize comparison of strlen with 0 on string where operations on it should force the result to be non-0
</td>
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<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>Linux
</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>
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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>gabravier@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>char a[32];
bool f(void)
{
a[0] = '1';
return strlen(a) == 0;
}
The operand of the `return` statement can be optimized to `false`. This
transformation is done by GCC, but not by LLVM.</pre>
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