<div dir="ltr">SGTM then.<div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Nov 13, 2015 at 11:04 PM, Owen Anderson <span dir="ltr"><<a href="mailto:resistor@mac.com" target="_blank">resistor@mac.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><span class=""><br><div><blockquote type="cite"><div>On Nov 13, 2015, at 9:59 AM, Owen Anderson via llvm-commits <<a href="mailto:llvm-commits@lists.llvm.org" target="_blank">llvm-commits@lists.llvm.org</a>> wrote:</div><br><div><div style="word-wrap:break-word"><div><blockquote type="cite" style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div><br>I'm not opposed, I'd like to see compile time numbers first since it transforms reassociate into an iterative algorithm.</div></div></div></div></div></blockquote><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br></div><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">I’ll see what I can get you on that.</div></div></div></div></blockquote></div><br></span><div>I measured the compile time impact on “opt -O3” on a single-bitcode-file for all of opt itself. </div><div><br></div><div>— Reassociate accounts for about 0.5% of total time.</div><div><div>— I had a hard time getting stable numbers, but assuming the worst case Reassociate regresses about 2%.</div></div><div><br></div><div>I would consider this firmly below the noise floor.  </div><span class="HOEnZb"><font color="#888888"><div><br></div><div>—Owen</div></font></span></div></blockquote></div><br></div>