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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - -Wcast-align doesn't special case char*"
href="http://llvm.org/bugs/show_bug.cgi?id=18711">18711</a>
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<th>Summary</th>
<td>-Wcast-align doesn't special case char*
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>3.4
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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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>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>htam@apple.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>$ cat foo.c
void foo(char* bar) {
*(int*)(bar + 4) = 7;
}
$ clang foo.c -c -o /dev/null -Wcast-align
foo.c:2:6: warning: cast from 'char *' to 'int *' increases required alignment
from 1 to 4 [-Wcast-align]
*(int*)(bar + 4) = 7;
^~~~~~~~~~~~~~~
1 warning generated.
The -Wcast-align warning should not be generated by casts from char*, since it
is magical and often points to things that are not remotely related to char.</pre>
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