[Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)

2018-02-26 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82862 Richard Biener changed: What|Removed |Added Status|WAITING |RESOLVED Resolution|---

[Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)

2018-02-19 Thread alexander.nesterovskiy at intel dot com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82862 --- Comment #8 from Alexander Nesterovskiy --- I'd say that it's not just fixed but improved with an impressive gain. It is about +4% on HSW AVX2 and about +8% on SKX AVX512 after r257734 (compared to r257732) for a 465.tonto SPEC rate.

[Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)

2018-02-16 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82862 Richard Biener changed: What|Removed |Added Status|NEW |WAITING --- Comment #7 from Richard

[Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)

2018-02-16 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82862 --- Comment #6 from Richard Biener --- Author: rguenth Date: Fri Feb 16 13:47:25 2018 New Revision: 257734 URL: https://gcc.gnu.org/viewcvs?rev=257734=gcc=rev Log: 2018-02-16 Richard Biener PR

[Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)

2017-11-22 Thread hubicka at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82862 Jan Hubicka changed: What|Removed |Added Status|ASSIGNED|NEW CC|

[Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)

2017-11-22 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82862 --- Comment #4 from Richard Biener --- I don't have any good ideas here. Fortran with allocated arrays tends to use quite some integer registers for all the IV setup and computation. One can experiment with less peeling of vector epilogues

[Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)

2017-11-22 Thread hubicka at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82862 --- Comment #3 from Jan Hubicka --- Created attachment 42680 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42680=edit Assembly produced showing register pressure issues.

[Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)

2017-11-22 Thread hubicka at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82862 --- Comment #2 from Jan Hubicka --- First of all, thanks a lot for reproducer! Here are times with vectorizer enabled, disabled and no costmodel Performance counter stats for './a.out-vect 21 100' (10 runs): 4588.055614

[Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)

2017-11-19 Thread hubicka at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82862 Jan Hubicka changed: What|Removed |Added Status|UNCONFIRMED |ASSIGNED Last reconfirmed|

[Bug target/82862] [8 Regression] SPEC CPU2006 465.tonto performance regression with r253975 (up to 40% drop for particular loop)

2017-11-06 Thread pinskia at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82862 Andrew Pinski changed: What|Removed |Added Keywords||missed-optimization Target|