http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56935
Richard Biener changed:
What|Removed |Added
Status|WAITING |RESOLVED
Resolution|
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56935
--- Comment #6 from Yuri Rumyantsev 2013-04-22
14:46:16 UTC ---
Richard,
Sorry for troubles since we found out the real cause of performance degradation
- code layout was changed after your fix and it caused ~5% slowdown on
253.perlbmk
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56935
--- Comment #5 from rguenther at suse dot de
2013-04-16 07:48:47 UTC ---
On Mon, 15 Apr 2013, ysrumyan at gmail dot com wrote:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56935
>
> --- Comment #4 from Yuri Rumyantsev 2013-04-15
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56935
--- Comment #4 from Yuri Rumyantsev 2013-04-15
14:54:50 UTC ---
Richard,
both subq's are accessed the same cash line and it means that after 1st store
tthe 2nd load will stall till finish updating data cash (this is not exact
explanatio
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56935
Richard Biener changed:
What|Removed |Added
Status|ASSIGNED|WAITING
--- Comment #3 from Ri
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56935
Richard Biener changed:
What|Removed |Added
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed|
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56935
--- Comment #1 from Yuri Rumyantsev 2013-04-12
14:01:50 UTC ---
Created attachment 29862
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29862
testcase
Need to be compiled with the following options:
-O3 -mavx -march=corei7
