<div dir="ltr">What platform, Ivybridge ?<div><br></div><div>David</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 27, 2016 at 6:28 PM, Dehao Chen <span dir="ltr"><<a href="mailto:danielcdh@gmail.com" target="_blank">danielcdh@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">danielcdh added a comment.<br>
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I just tested the perf impact of this patch for SPECCPU INT2006 benchmarks:<br>
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400.perlbench   2.21%<br>
401.bzip2       -0.46%<br>
403.gcc 1.59%<br>
429.mcf 1.79%<br>
445.gobmk       1.52%<br>
456.hmmer       1.63%<br>
458.sjeng       5.62%<br>
462.libquantum  1.54%<br>
464.h264ref     -1.28%<br>
471.omnetpp     0.00%<br>
473.astar       2.35%<br>
483.xalancbmk   -0.27%<br>
overall 1.29%<br>
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About the -Oz issue, I agree that there should be no xor inserted at -Oz. But that's a different issue and should be fixed in a separate patch.<br>
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<a href="http://reviews.llvm.org/D21560" rel="noreferrer" target="_blank">http://reviews.llvm.org/D21560</a><br>
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