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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Warn when the return value of memcpy is compared to 0"
href="http://llvm.org/bugs/show_bug.cgi?id=19679">19679</a>
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<th>Summary</th>
<td>Warn when the return value of memcpy is compared to 0
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.4
</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>
</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>-New Bugs
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>ju.orth@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Consider this code:
```
#include <string.h>
int f(char *a);
int f(char *a)
{
return memcpy(a, "test", 4) != 0;
}
```
It is clear that this memcpy should actually be memcmp. The comparison makes no
sense and should cause clang to emit a warning.</pre>
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