<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Oct 16, 2014 at 9:56 PM, Adam Nemet <span dir="ltr"><<a href="mailto:anemet@apple.com" target="_blank">anemet@apple.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">> On Oct 16, 2014, at 3:04 AM, Renato Golin <<a href="mailto:renato.golin@linaro.org">renato.golin@linaro.org</a>> wrote:<br>
><br>
> On 16 October 2014 09:34, Hal Finkel <<a href="mailto:hfinkel@anl.gov">hfinkel@anl.gov</a>> wrote:<br>
>> Interesting. Looks like the problem is in (219545, 219569].<br>
><br>
> Yes.<br>
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</span>Chandler’s complex arithmetic changes are also in the range: r219557 in clang. We saw it change the code in mandel-2 significantly.</blockquote></div><br>I would not at all be surprised by regression in some cases here.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Complex arithmetic with reals got *much* faster. Complex arithmetic with other complex numbers may have gotten slower. If there were fastmath flags, *crazy preposterously slower*.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Note that I have a patch out needing review which addresses most of the regression in this case, and should address all of the regressions if fastmath flags are in play.</div></div>