[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

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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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