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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang hangs at -O3 on loop"
href="http://llvm.org/bugs/show_bug.cgi?id=15748">15748</a>
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<th>Summary</th>
<td>clang hangs at -O3 on loop
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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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>
</tr>
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<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>dhazeghi@yahoo.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 testcase (generated by csmith) causes current clang trunk to hang
when compiling at -O3.
This does not appear to be the same as 15714, which was recently fixed.
$ clang -v
clang version 3.3 (trunk 179483)
Target: x86_64-pc-linux-gnu
Thread model: posix
$ clang -O2 -c try.c
$ clang -O3 -c try.c
^C
--------------
int a, b, c, d;
void fn1 ()
{
int e = 0;
for (; a; a++)
{
int *f = &c;
d || (e |= *f);
b ^= *f = 1;
}
}</pre>
</div>
</p>
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