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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Absurd program results in illegal hardware instruction under optimization"
href="http://llvm.org/bugs/show_bug.cgi?id=16347">16347</a>
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<th>Summary</th>
<td>Absurd program results in illegal hardware instruction under optimization
</td>
</tr>
<tr>
<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>Macintosh
</td>
</tr>
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<th>OS</th>
<td>MacOS X
</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>C++11
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>so.townsend@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, 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=10691" name="attach_10691" title="Try removing the comment, it works then.">attachment 10691</a> <a href="attachment.cgi?id=10691&action=edit" title="Try removing the comment, it works then.">[details]</a></span>
Try removing the comment, it works then.
The attached program does not fail to compile but emits invalid instructions
when compiled under
clang++ -O4 -std=c++11
clang++ -O3 -std=c++11
clang++ -O2 -std=c++11
clang++ -O1 -std=c++11 results in a proper segmentation fault.
otool -Vt dump
----------------------
Optimizer level 4:
(__TEXT,__text) section
_main:
0000000100000f70 ud2</pre>
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