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<body><span class="vcard"><a class="email" href="mailto:isanbard@gmail.com" title="Bill Wendling <isanbard@gmail.com>"> <span class="fn">Bill Wendling</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Instcombine quadratic in add chain length"
href="http://llvm.org/bugs/show_bug.cgi?id=3953">bug 3953</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>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>isanbard@gmail.com
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<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Instcombine quadratic in add chain length"
href="http://llvm.org/bugs/show_bug.cgi?id=3953#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Instcombine quadratic in add chain length"
href="http://llvm.org/bugs/show_bug.cgi?id=3953">bug 3953</a>
from <span class="vcard"><a class="email" href="mailto:isanbard@gmail.com" title="Bill Wendling <isanbard@gmail.com>"> <span class="fn">Bill Wendling</span></a>
</span></b>
<pre>I'm going to claim that this isn't a problem anymore:
$ for N in 500 1000 1500 2000 2500 5000 5500 10000; do python
./instcombine_test3.py $N | time $LLVM/opt -instcombine -disable-output; done
0.03 real 0.00 user 0.00 sys
0.03 real 0.01 user 0.00 sys
0.04 real 0.01 user 0.00 sys
0.05 real 0.02 user 0.00 sys
0.05 real 0.02 user 0.00 sys
0.08 real 0.05 user 0.00 sys
0.08 real 0.05 user 0.00 sys
0.14 real 0.10 user 0.01 sys</pre>
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