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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Himeno performance regression since r243460"
href="https://llvm.org/bugs/show_bug.cgi?id=29051">29051</a>
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<th>Summary</th>
<td>Himeno performance regression since r243460
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>3.8
</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>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Scalar Optimizations
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>lukebenes@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>Himeno Benchmark v 3.0 performance decreases by ~13% after r243460.
Steps to reproduce:
$ export CC=clang
$ export CFLAGS="-O3 -march=native"
$ phoronix-test-suite run pts/himeno
Or you should be able to use the llvm test suite version:
<a href="https://llvm.org/svn/llvm-project/test-suite/trunk/SingleSource/Benchmarks/Misc/himenobmtxpa.c">https://llvm.org/svn/llvm-project/test-suite/trunk/SingleSource/Benchmarks/Misc/himenobmtxpa.c</a>
On my system,
gcc 5.4 : 1122.2
clang 243459: 946.7
clang 243460: 840.6
I bisected the regression down to this commit:
<a href="http://llvm.org/viewvc/llvm-project?view=revision&revision=243460">http://llvm.org/viewvc/llvm-project?view=revision&revision=243460</a></pre>
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