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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Poor MMX+SSE codegen"
href="http://llvm.org/bugs/show_bug.cgi?id=17548">17548</a>
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<tr>
<th>Summary</th>
<td>Poor MMX+SSE codegen
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>3.3
</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>
<tr>
<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>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dsaritz@gmail.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>Noticed in FFT code in the NT2 library, please consult this MSVC ticket for
information on how to get to the code:
<a href="https://connect.microsoft.com/VisualStudio/feedback/details/804579/msvc-serious-sse-codegen-regression">https://connect.microsoft.com/VisualStudio/feedback/details/804579/msvc-serious-sse-codegen-regression</a>
Pay attention to the note in extra_registers.hpp for line 41...
- possibly related to:
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Excessive register spilling with large functions"
href="show_bug.cgi?id=13292">http://llvm.org/bugs/show_bug.cgi?id=13292</a>
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - llvm spills like crazy on fft code"
href="show_bug.cgi?id=1821">http://llvm.org/bugs/show_bug.cgi?id=1821</a>
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Consider "register-to-register spilling""
href="show_bug.cgi?id=17547">http://llvm.org/bugs/show_bug.cgi?id=17547</a></pre>
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</p>
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