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* [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893
@ 2021-09-28 15:00 clyon at gcc dot gnu.org
2021-09-29 6:13 ` [Bug tree-optimization/102516] " rguenth at gcc dot gnu.org
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: clyon at gcc dot gnu.org @ 2021-09-28 15:00 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102516
Bug ID: 102516
Summary: [12 regression] pr65947-13.c and vect-alias-check-18.c
fail on armeb since r12-3893
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: clyon at gcc dot gnu.org
Target Milestone: ---
Since r12-3893 (g:6390c5047adb75960f86d56582e6322aaa4d9281), I've noticed
regressions on armeb targets:
gcc.dg/vect/pr65947-13.c: pattern found 1 times
FAIL: gcc.dg/vect/pr65947-13.c scan-tree-dump-times vect "LOOP VECTORIZED" 2
gcc.dg/vect/pr65947-13.c -flto -ffat-lto-objects : pattern found 1 times
FAIL: gcc.dg/vect/pr65947-13.c -flto -ffat-lto-objects scan-tree-dump-times
vect "LOOP VECTORIZED" 2
FAIL: gcc:gcc.dg/vect/vect.exp=gcc.dg/vect/vect-alias-check-18.c -flto
-ffat-lto-objects scan-tree-dump vect "using an index-based WAR/WAW test"
FAIL: gcc:gcc.dg/vect/vect.exp=gcc.dg/vect/vect-alias-check-18.c scan-tree-dump
vect "using an index-based WAR/WAW test"
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/102516] [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893
2021-09-28 15:00 [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893 clyon at gcc dot gnu.org
@ 2021-09-29 6:13 ` rguenth at gcc dot gnu.org
2021-09-29 12:44 ` rguenth at gcc dot gnu.org
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-09-29 6:13 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102516
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |12.0
Last reconfirmed| |2021-09-29
Ever confirmed|0 |1
Component|middle-end |tree-optimization
Status|UNCONFIRMED |ASSIGNED
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/102516] [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893
2021-09-28 15:00 [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893 clyon at gcc dot gnu.org
2021-09-29 6:13 ` [Bug tree-optimization/102516] " rguenth at gcc dot gnu.org
@ 2021-09-29 12:44 ` rguenth at gcc dot gnu.org
2021-09-29 13:12 ` clyon at gcc dot gnu.org
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-09-29 12:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102516
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |WAITING
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
How do I need to configure GCC? --target=armeb-linux-gnu isn't supported.
Note this looks like peeling related, maybe it's also fixed after
g:4c7731081647c22cbd249dc0faa20c3df9ed6411
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/102516] [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893
2021-09-28 15:00 [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893 clyon at gcc dot gnu.org
2021-09-29 6:13 ` [Bug tree-optimization/102516] " rguenth at gcc dot gnu.org
2021-09-29 12:44 ` rguenth at gcc dot gnu.org
@ 2021-09-29 13:12 ` clyon at gcc dot gnu.org
2022-04-12 15:31 ` rearnsha at gcc dot gnu.org
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: clyon at gcc dot gnu.org @ 2021-09-29 13:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102516
--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> ---
The target name is armeb-linux-gnueabi or armeb-linux-gnueabihf
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/102516] [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893
2021-09-28 15:00 [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893 clyon at gcc dot gnu.org
` (2 preceding siblings ...)
2021-09-29 13:12 ` clyon at gcc dot gnu.org
@ 2022-04-12 15:31 ` rearnsha at gcc dot gnu.org
2022-04-12 21:11 ` clyon at gcc dot gnu.org
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rearnsha at gcc dot gnu.org @ 2022-04-12 15:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102516
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
I can reproduce this on an normal arm-eabi cross compiler with
$build/gcc/xgcc -B$build/gcc/ $src/gcc/testsuite/gcc.dg/vect/pr65947-13.c
-mbig-endian -march=armv7-a+simd -fdiagnostics-plain-output -mfloat-abi=softfp
-ffast-math -ftree-vectorize -fno-tree-loop-distribute-patterns
-fno-vect-cost-model -fno-common -O2 -fdump-tree-vect-details --param
vect-epilogues-nomask=0 -S -isystem
$build/arm-eabi/thumb/v7-a/nofp/newlib/targ-include -isystem
$src/newlib/libc/include -o pr65947-13.s
The test expects "LOOP VECTORIZED" to appear twice in the dump file, but it
only appears once.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/102516] [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893
2021-09-28 15:00 [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893 clyon at gcc dot gnu.org
` (3 preceding siblings ...)
2022-04-12 15:31 ` rearnsha at gcc dot gnu.org
@ 2022-04-12 21:11 ` clyon at gcc dot gnu.org
2022-05-06 8:31 ` [Bug tree-optimization/102516] [12/13 " jakub at gcc dot gnu.org
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: clyon at gcc dot gnu.org @ 2022-04-12 21:11 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102516
--- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Indeed. I know that vectorization does not work on armeb as well as on arm
(little-endian), I was just wondering whether this regression was "expected"
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/102516] [12/13 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893
2021-09-28 15:00 [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893 clyon at gcc dot gnu.org
` (4 preceding siblings ...)
2022-04-12 21:11 ` clyon at gcc dot gnu.org
@ 2022-05-06 8:31 ` jakub at gcc dot gnu.org
2022-10-19 9:34 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-05-06 8:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102516
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|12.0 |12.2
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 12.1 is being released, retargeting bugs to GCC 12.2.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/102516] [12/13 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893
2021-09-28 15:00 [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893 clyon at gcc dot gnu.org
` (5 preceding siblings ...)
2022-05-06 8:31 ` [Bug tree-optimization/102516] [12/13 " jakub at gcc dot gnu.org
@ 2022-10-19 9:34 ` rguenth at gcc dot gnu.org
2022-10-24 12:56 ` clyon at gcc dot gnu.org
2023-02-21 15:04 ` rguenth at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-10-19 9:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102516
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note the change wasn't expected.
Btw, with what Richard says in comment#4 I see LOOP VECTORIZED twice on recent
trunk.
So is this still an issue? Can somebody bisect for the fix?
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/102516] [12/13 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893
2021-09-28 15:00 [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893 clyon at gcc dot gnu.org
` (6 preceding siblings ...)
2022-10-19 9:34 ` rguenth at gcc dot gnu.org
@ 2022-10-24 12:56 ` clyon at gcc dot gnu.org
2023-02-21 15:04 ` rguenth at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: clyon at gcc dot gnu.org @ 2022-10-24 12:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102516
--- Comment #9 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Indeed it works again on trunk, I bisected and it started with one of our
commits: r12-3958-g4c7731081647c22cbd249dc0faa20c3df9ed6411
Author: Richard Biener <rguenther@suse.de>
Date: Wed Sep 29 11:18:23 2021 +0200
Fix peeling for alignment with negative step
The following fixes a regression causing us to no longer peel
negative step loops for alignment. With dr_misalignment now
applying the bias for negative step we have to do the reverse
when adjusting the misalignment for peeled DRs.
2021-09-29 Richard Biener <rguenther@suse.de>
* tree-vect-data-refs.c (vect_dr_misalign_for_aligned_access):
New helper.
(vect_update_misalignment_for_peel): Use it to update
misaligned to the value necessary for an aligned access.
(vect_get_peeling_costs_all_drs): Likewise.
(vect_enhance_data_refs_alignment): Likewise.
* gcc.target/i386/vect-alignment-peeling-1.c: New testcase.
* gcc.target/i386/vect-alignment-peeling-2.c: Likewise.
We still have
FAIL: gcc.dg/vect/pr65947-13.c scan-tree-dump-times vect "condition expression
based on integer induction." 2
but based on the original report, this was already present
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/102516] [12/13 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893
2021-09-28 15:00 [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893 clyon at gcc dot gnu.org
` (7 preceding siblings ...)
2022-10-24 12:56 ` clyon at gcc dot gnu.org
@ 2023-02-21 15:04 ` rguenth at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-02-21 15:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102516
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Thus fixed.
^ permalink raw reply [flat|nested] 10+ messages in thread
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2021-09-28 15:00 [Bug middle-end/102516] New: [12 regression] pr65947-13.c and vect-alias-check-18.c fail on armeb since r12-3893 clyon at gcc dot gnu.org
2021-09-29 6:13 ` [Bug tree-optimization/102516] " rguenth at gcc dot gnu.org
2021-09-29 12:44 ` rguenth at gcc dot gnu.org
2021-09-29 13:12 ` clyon at gcc dot gnu.org
2022-04-12 15:31 ` rearnsha at gcc dot gnu.org
2022-04-12 21:11 ` clyon at gcc dot gnu.org
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2022-10-19 9:34 ` rguenth at gcc dot gnu.org
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