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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - llc -O0 producing incorrect binary where llc -O2 and gcc produce correct code"
href="http://llvm.org/bugs/show_bug.cgi?id=16528">16528</a>
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<tr>
<th>Summary</th>
<td>llc -O0 producing incorrect binary where llc -O2 and gcc produce correct code
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<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>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Backend: X86
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>richard-llvm@metafoo.co.uk
</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>Created <span class=""><a href="attachment.cgi?id=10810" name="attach_10810" title="csmith-produced testcase">attachment 10810</a> <a href="attachment.cgi?id=10810&action=edit" title="csmith-produced testcase">[details]</a></span>
csmith-produced testcase
Attached testcase produced by csmith; this is claimed to not have any undefined
behavior. A correct binary produces
checksum = 55A8B9C3
gcc produces a correct binary, as does clang with any optimizations, as does
clang test.c -O0 -emit-llvm | llc -O1 - | clang -x assembler -
but llc -O0 produces an incorrect binary.</pre>
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