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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - -O3 on AMD Phenom causes long compilation time"
href="https://llvm.org/bugs/show_bug.cgi?id=25981">25981</a>
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<th>Summary</th>
<td>-O3 on AMD Phenom causes long compilation time
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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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>
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<th>Component</th>
<td>new bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>dcb314@hotmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</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=15538" name="attach_15538" title="C source code">attachment 15538</a> <a href="attachment.cgi?id=15538&action=edit" title="C source code">[details]</a></span>
C source code
The attached file, when compiled with clang trunk revision 256486,
fails to compile in 20 minutes CPU time on a 3.5GHz AMD Phenom.
-O2 takes 2.4 seconds.
clang version 3.8 with -O3 takes 1.8 seconds.</pre>
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