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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - inconsistent -Wsign-compare warnings due to type cast"
href="http://llvm.org/bugs/show_bug.cgi?id=22223">22223</a>
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<th>Summary</th>
<td>inconsistent -Wsign-compare warnings due to type cast
</td>
</tr>
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<th>Product</th>
<td>clang
</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>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>chengniansun@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>If I add the type cast (int)(0 > a), Clang warns. Otherwise not.
$: cat s.c
int a;
void fn1(int b) {
0xEE5FD967FC84F78BLL <= ((int)(0 > a) / (long long)1); //<-warning here
0xEE5FD967FC84F78BLL <= ( (0 > a) / (long long)1); //<-NO warning
}
$:
$: clang-trunk -c s.c -Wsign-compare -Wno-unused-value
s.c:3:24: warning: comparison of integers of different signs: 'unsigned long
long' and 'long long'
[-Wsign-compare]
0xEE5FD967FC84F78BLL <= ((int)(0 > a) / (long long)1); //<-warning here
~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
$:
$: gcc-trunk -c s.c -Wsign-compare
$:
$:</pre>
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</p>
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