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<p class="MsoPlainText">We did a quick check with and without the patch for cpu2006 INT bms only. Looks like overall impact is neutral. Most of the ups/downs are in the noise range except probably sjeng.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:black">445.gobmk</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">456.hmmer</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">458.sjeng</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
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<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">-----Original Message-----<br>
From: llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org] On Behalf Of Evgeny Stupachenko via llvm-dev<br>
Sent: Wednesday, February 15, 2017 2:15 AM<br>
To: llvm-dev@lists.llvm.org<br>
Subject: [llvm-dev] An option switching LSR to choose solution with minimum instructions</p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Hi All,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">A new option for LSR "-lsr-insns-cost" was introduced in the patch
<a href="https://reviews.llvm.org/D28307"><span style="color:windowtext;text-decoration:none">https://reviews.llvm.org/D28307</span></a>.<o:p></o:p></p>
<p class="MsoPlainText">Basically it set instruction count as priority number one for solutions with low register use.<o:p></o:p></p>
<p class="MsoPlainText">This lead to smaller loops in most cases.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">The goal is to enable the option by default for x86.<o:p></o:p></p>
<p class="MsoPlainText">Could you please check your benchmarks to see if there are gains/loses and report this here?<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">That I have for now is:<o:p></o:p></p>
<p class="MsoPlainText">177.mesa on -O2 +3%<o:p></o:p></p>
<p class="MsoPlainText">256.bzip2 on -Ofast -flto +1.5%<o:p></o:p></p>
<p class="MsoPlainText">and overall good improvements for x86.<o:p></o:p></p>
<p class="MsoPlainText">The only regression is on linpack test 3% on HSW, however it differs on other CPUs (say for Atoms it is 3% gain).<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Thanks,<o:p></o:p></p>
<p class="MsoPlainText">Evgeny<o:p></o:p></p>
<p class="MsoPlainText">_______________________________________________<o:p></o:p></p>
<p class="MsoPlainText">LLVM Developers mailing list<o:p></o:p></p>
<p class="MsoPlainText"><a href="mailto:llvm-dev@lists.llvm.org"><span style="color:windowtext;text-decoration:none">llvm-dev@lists.llvm.org</span></a><o:p></o:p></p>
<p class="MsoPlainText"><a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev"><span style="color:windowtext;text-decoration:none">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</span></a><o:p></o:p></p>
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