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* [Bug tree-optimization/104058] New: [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
@ 2022-01-17 2:04 admin at levyhsu dot com
2022-01-17 2:07 ` [Bug tree-optimization/104058] " pinskia at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: admin at levyhsu dot com @ 2022-01-17 2:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104058
Bug ID: 104058
Summary: [12 Regression] 6-7% x264_r regression with
-march=native -Ofast -funroll-loops -flto on x86 since
r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: admin at levyhsu dot com
Target Milestone: ---
We observed regression on 525.x264_r with commit
d3ff7420e941931d32ce2e332e7968fe67ba20af
On IceLake(8358):
-7.27%
On Zen3(7763):
-6.67%
On Zen3(5800x):
-6.45%
The regression on Zen 3 can also be found in
https://lnt.opensuse.org/db_default/v4/SPEC/graph?highlight_run=22984&plot.0=475.377.0
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/104058] [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-17 2:04 [Bug tree-optimization/104058] New: [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af admin at levyhsu dot com
@ 2022-01-17 2:07 ` pinskia at gcc dot gnu.org
2022-01-17 2:10 ` pinskia at gcc dot gnu.org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-01-17 2:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104058
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |12.0
Blocks| |53947
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/104058] [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-17 2:04 [Bug tree-optimization/104058] New: [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af admin at levyhsu dot com
2022-01-17 2:07 ` [Bug tree-optimization/104058] " pinskia at gcc dot gnu.org
@ 2022-01-17 2:10 ` pinskia at gcc dot gnu.org
2022-01-17 8:39 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-01-17 2:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104058
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103997#c4 might be the discussion
around what is happening.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/104058] [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-17 2:04 [Bug tree-optimization/104058] New: [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af admin at levyhsu dot com
2022-01-17 2:07 ` [Bug tree-optimization/104058] " pinskia at gcc dot gnu.org
2022-01-17 2:10 ` pinskia at gcc dot gnu.org
@ 2022-01-17 8:39 ` rguenth at gcc dot gnu.org
2022-01-17 10:45 ` marxin at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-01-17 8:39 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104058
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yeah, it's likely missed epilogue vectorization because of that change.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/104058] [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-17 2:04 [Bug tree-optimization/104058] New: [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af admin at levyhsu dot com
` (2 preceding siblings ...)
2022-01-17 8:39 ` rguenth at gcc dot gnu.org
@ 2022-01-17 10:45 ` marxin at gcc dot gnu.org
2022-01-18 13:46 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: marxin at gcc dot gnu.org @ 2022-01-17 10:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104058
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
Last reconfirmed| |2022-01-17
Blocks| |26163
Status|UNCONFIRMED |NEW
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/104058] [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-17 2:04 [Bug tree-optimization/104058] New: [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af admin at levyhsu dot com
` (3 preceding siblings ...)
2022-01-17 10:45 ` marxin at gcc dot gnu.org
@ 2022-01-18 13:46 ` rguenth at gcc dot gnu.org
2022-01-20 8:51 ` admin at levyhsu dot com
2022-01-25 11:02 ` rguenth at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-01-18 13:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104058
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
Depends on| |103997
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Waiting for the PR103997 fix, please re-evaluate after that bug is closed.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103997
[Bug 103997] [12 Regression] gcc.target/i386/pr88531-??.c scan-assembler-times
FAILs
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/104058] [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-17 2:04 [Bug tree-optimization/104058] New: [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af admin at levyhsu dot com
` (4 preceding siblings ...)
2022-01-18 13:46 ` rguenth at gcc dot gnu.org
@ 2022-01-20 8:51 ` admin at levyhsu dot com
2022-01-25 11:02 ` rguenth at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: admin at levyhsu dot com @ 2022-01-20 8:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104058
Levy Hsu <admin at levyhsu dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|WAITING |RESOLVED
--- Comment #4 from Levy Hsu <admin at levyhsu dot com> ---
SkyLake
+6.79%
CascadeLake
+7.56%
Zen2
+5.77%
Look likes it's resolved. We'll track it further in weekly report.
Thanks
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/104058] [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-17 2:04 [Bug tree-optimization/104058] New: [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af admin at levyhsu dot com
` (5 preceding siblings ...)
2022-01-20 8:51 ` admin at levyhsu dot com
@ 2022-01-25 11:02 ` rguenth at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-01-25 11:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104058
Bug 104058 depends on bug 103997, which changed state.
Bug 103997 Summary: [12 Regression] gcc.target/i386/pr88531-??.c scan-assembler-times FAILs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103997
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
^ permalink raw reply [flat|nested] 8+ messages in thread
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2022-01-17 2:04 [Bug tree-optimization/104058] New: [12 Regression] 6-7% x264_r regression with -march=native -Ofast -funroll-loops -flto on x86 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af admin at levyhsu dot com
2022-01-17 2:07 ` [Bug tree-optimization/104058] " pinskia at gcc dot gnu.org
2022-01-17 2:10 ` pinskia at gcc dot gnu.org
2022-01-17 8:39 ` rguenth at gcc dot gnu.org
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2022-01-18 13:46 ` rguenth at gcc dot gnu.org
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