[Bug tree-optimization/64193] [4.8/4.9/5 Regression] Decreased performance after r173250

2014-12-08 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64193 Richard Biener changed: What|Removed |Added Keywords||missed-optimization Status|

[Bug tree-optimization/64193] [4.8/4.9/5 Regression] Decreased performance after r173250

2014-12-09 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64193 --- Comment #4 from Richard Biener --- Created attachment 34229 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34229&action=edit patch Ok, I see the regression introduced by that rev., but on trunk (r218479) I get the same code generated w

[Bug tree-optimization/64193] [4.8/4.9/5 Regression] Decreased performance after r173250

2014-12-09 Thread cederman at gaisler dot com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64193 --- Comment #5 from Daniel Cederman --- > Probably the regression was mitigated by the partial fix for PR63677: Yes, that seems to be the case for my attached example. Do you think that the regression is mitigated in general, or is your attached

[Bug tree-optimization/64193] [4.8/4.9/5 Regression] Decreased performance after r173250

2014-12-09 Thread rguenther at suse dot de
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64193 --- Comment #6 from rguenther at suse dot de --- On Tue, 9 Dec 2014, cederman at gaisler dot com wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64193 > > --- Comment #5 from Daniel Cederman --- > > Probably the regression was mitigated

[Bug tree-optimization/64193] [4.8/4.9/5 Regression] Decreased performance after r173250

2014-12-09 Thread dominiq at lps dot ens.fr
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64193 --- Comment #7 from Dominique d'Humieres --- AFAICT if there is any speedup with the patch in comment 5, it is negligible on a 2.8Ghz Corei7 and x86_64-apple-darwin14: ~7.1s with/without the patch. Note that the timing in the test is not very pre

[Bug tree-optimization/64193] [4.8/4.9/5 Regression] Decreased performance after r173250

2014-12-09 Thread rguenther at suse dot de
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64193 --- Comment #8 from rguenther at suse dot de --- On Tue, 9 Dec 2014, dominiq at lps dot ens.fr wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64193 > > --- Comment #7 from Dominique d'Humieres --- > AFAICT if there is any speedup with t