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* [Bug rtl-optimization/104663] New: A 50% C-Ray regression in GCC 12.0 for ADL at -O2
@ 2022-02-23 14:19 aros at gmx dot com
2022-02-23 18:08 ` [Bug target/104663] " pinskia at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: aros at gmx dot com @ 2022-02-23 14:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104663
Bug ID: 104663
Summary: A 50% C-Ray regression in GCC 12.0 for ADL at -O2
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: aros at gmx dot com
Target Milestone: ---
Check the first graph at
https://www.phoronix.com/scan.php?page=article&item=gcc12-feb-alderlake&num=3
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug target/104663] A 50% C-Ray regression in GCC 12.0 for ADL at -O2 2022-02-23 14:19 [Bug rtl-optimization/104663] New: A 50% C-Ray regression in GCC 12.0 for ADL at -O2 aros at gmx dot com @ 2022-02-23 18:08 ` pinskia at gcc dot gnu.org 2022-02-23 23:43 ` pinskia at gcc dot gnu.org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-02-23 18:08 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104663 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- My bet is this is because the vectorizer is enabled now at -O2. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/104663] A 50% C-Ray regression in GCC 12.0 for ADL at -O2 2022-02-23 14:19 [Bug rtl-optimization/104663] New: A 50% C-Ray regression in GCC 12.0 for ADL at -O2 aros at gmx dot com 2022-02-23 18:08 ` [Bug target/104663] " pinskia at gcc dot gnu.org @ 2022-02-23 23:43 ` pinskia at gcc dot gnu.org 2022-02-23 23:47 ` [Bug target/104663] [12 Regression] C-ray 1.1 performance is 50% worse at -O2 in GCC 12 than before on alderlake pinskia at gcc dot gnu.org ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-02-23 23:43 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104663 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target| |x86_64-linux-gnu Keywords| |missed-optimization Target Milestone|--- |12.0 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/104663] [12 Regression] C-ray 1.1 performance is 50% worse at -O2 in GCC 12 than before on alderlake 2022-02-23 14:19 [Bug rtl-optimization/104663] New: A 50% C-Ray regression in GCC 12.0 for ADL at -O2 aros at gmx dot com 2022-02-23 18:08 ` [Bug target/104663] " pinskia at gcc dot gnu.org 2022-02-23 23:43 ` pinskia at gcc dot gnu.org @ 2022-02-23 23:47 ` pinskia at gcc dot gnu.org 2022-02-24 5:24 ` aros at gmx dot com ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-02-23 23:47 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104663 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Ever confirmed|0 |1 Last reconfirmed| |2022-02-23 Status|UNCONFIRMED |WAITING --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Someone is going to need to anlysis this. I suspect -fno-tree-vectorize gets the performance back. This would mean most likely a cost model issue. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/104663] [12 Regression] C-ray 1.1 performance is 50% worse at -O2 in GCC 12 than before on alderlake 2022-02-23 14:19 [Bug rtl-optimization/104663] New: A 50% C-Ray regression in GCC 12.0 for ADL at -O2 aros at gmx dot com ` (2 preceding siblings ...) 2022-02-23 23:47 ` [Bug target/104663] [12 Regression] C-ray 1.1 performance is 50% worse at -O2 in GCC 12 than before on alderlake pinskia at gcc dot gnu.org @ 2022-02-24 5:24 ` aros at gmx dot com 2022-02-24 9:25 ` jakub at gcc dot gnu.org 2022-02-24 9:54 ` rguenth at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: aros at gmx dot com @ 2022-02-24 5:24 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104663 --- Comment #3 from Artem S. Tashkinov <aros at gmx dot com> --- Also -O3 is 50% faster which sounds unreasonable. -O2 with GCC12 is 75% slower than -O3 for GCC 11. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/104663] [12 Regression] C-ray 1.1 performance is 50% worse at -O2 in GCC 12 than before on alderlake 2022-02-23 14:19 [Bug rtl-optimization/104663] New: A 50% C-Ray regression in GCC 12.0 for ADL at -O2 aros at gmx dot com ` (3 preceding siblings ...) 2022-02-24 5:24 ` aros at gmx dot com @ 2022-02-24 9:25 ` jakub at gcc dot gnu.org 2022-02-24 9:54 ` rguenth at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: jakub at gcc dot gnu.org @ 2022-02-24 9:25 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104663 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Isn't this related or dup of PR101908 ? ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/104663] [12 Regression] C-ray 1.1 performance is 50% worse at -O2 in GCC 12 than before on alderlake 2022-02-23 14:19 [Bug rtl-optimization/104663] New: A 50% C-Ray regression in GCC 12.0 for ADL at -O2 aros at gmx dot com ` (4 preceding siblings ...) 2022-02-24 9:25 ` jakub at gcc dot gnu.org @ 2022-02-24 9:54 ` rguenth at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu.org @ 2022-02-24 9:54 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104663 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |DUPLICATE Status|WAITING |RESOLVED --- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- Yes, it is. *** This bug has been marked as a duplicate of bug 101908 *** ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-02-24 9:54 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-02-23 14:19 [Bug rtl-optimization/104663] New: A 50% C-Ray regression in GCC 12.0 for ADL at -O2 aros at gmx dot com 2022-02-23 18:08 ` [Bug target/104663] " pinskia at gcc dot gnu.org 2022-02-23 23:43 ` pinskia at gcc dot gnu.org 2022-02-23 23:47 ` [Bug target/104663] [12 Regression] C-ray 1.1 performance is 50% worse at -O2 in GCC 12 than before on alderlake pinskia at gcc dot gnu.org 2022-02-24 5:24 ` aros at gmx dot com 2022-02-24 9:25 ` jakub at gcc dot gnu.org 2022-02-24 9:54 ` rguenth at gcc dot gnu.org
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