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<body><span class="vcard"><a class="email" href="mailto:howarth.mailing.lists@gmail.com" title="Jack Howarth <howarth.mailing.lists@gmail.com>"> <span class="fn">Jack Howarth</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - r217953 degraded lsr optimization at -O3 for -march=nehalem in SciMark2's Sparse matmult benchmark"
href="https://llvm.org/bugs/show_bug.cgi?id=22640">bug 22640</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - r217953 degraded lsr optimization at -O3 for -march=nehalem in SciMark2's Sparse matmult benchmark"
href="https://llvm.org/bugs/show_bug.cgi?id=22640#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - r217953 degraded lsr optimization at -O3 for -march=nehalem in SciMark2's Sparse matmult benchmark"
href="https://llvm.org/bugs/show_bug.cgi?id=22640">bug 22640</a>
from <span class="vcard"><a class="email" href="mailto:howarth.mailing.lists@gmail.com" title="Jack Howarth <howarth.mailing.lists@gmail.com>"> <span class="fn">Jack Howarth</span></a>
</span></b>
<pre>Clang 3.8 RC1 on Nehalem now produces Sparse matmult results within 2% of the
that from Clang 3.5.1.
clang 3,8 RC1 1183.13+/-0.46
Interestingly, passing "-mllvm -disable-lsr" in addition to "-O3 -march=native"
now heavily regresses the benchmark in Clang 3.8 RC1.
clang 3.8 RC1 579.23+/-7.51
with "-mllvm -disable-lsr"</pre>
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