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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Missing conditional optimization compared to gcc"
href="http://llvm.org/bugs/show_bug.cgi?id=15964">15964</a>
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<th>Summary</th>
<td>Missing conditional optimization compared to gcc
</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>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Global Analyses
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>jmuizelaar@mozilla.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following two programs give the same result with gcc but B produces worse
code with clang.
A:
int
PL_strcasecmp(const char *a, const char *b)
{
while( (*a == *b) && ('\0' != *a))
{
a++;
b++;
}
return *a - *b;
}
B:
int
PL_strcasecmp(const char *a, const char *b)
{
while( (*a == *b) && ('\0' != *a) && ('\0' != *b))
{
a++;
b++;
}
return *a - *b;
}</pre>
</div>
</p>
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