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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang should warn on suspicious increments of loop variables"
href="http://llvm.org/bugs/show_bug.cgi?id=15636">15636</a>
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<th>Summary</th>
<td>clang should warn on suspicious increments of loop variables
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>resistor@mac.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Consider the following code snippet:
void foo(char *a, char *b, unsigned c) {
for (unsigned i = 0; i < c; ++i) {
a[i] = b[i];
++i;
}
}
clang does not currently warn on this, even though the code is likely incorrect
(incrementing i both in the loop latch and in the body of the loop). clang
should produce a warning when it detects a variable that is incremented in the
latch of the for header, and *unconditionally* incremented in the body of the
loop.</pre>
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