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* [Bug c/103977] New: ice in try_vectorize_loop_1
@ 2022-01-11 12:10 dcb314 at hotmail dot com
2022-01-11 12:17 ` [Bug tree-optimization/103977] " jakub at gcc dot gnu.org
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: dcb314 at hotmail dot com @ 2022-01-11 12:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103977
Bug ID: 103977
Summary: ice in try_vectorize_loop_1
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
Created attachment 52163
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52163&action=edit
gzipped C source code
The attached C code does this:
$ /home/dcb/gcc/results/bin/gcc -c -w -std=gnu89 -mno-sse -mno-mmx -O3
bug785.c
during GIMPLE pass: vect
mm/slab_common.c: In function ‘cache_random_seq_create’:
mm/slab_common.c:992:5: internal compiler error: in operator[], at vec.h:889
0x10367ab vect_analyze_loop(loop*, vec_info_shared*)
../../trunk.git/gcc/tree-vect-loop.c:0
0x1082487 try_vectorize_loop_1(hash_table<simduid_to_vf, false, xcallocator>*&,
unsigned int*, loop*, gimple*, gimple*, function*)
../../trunk.git/gcc/tree-vectorizer.c:1047
0x1082487 try_vectorize_loop(hash_table<simduid_to_vf, false, xcallocator>*&,
unsigned int*, loop*, function*)
../../trunk.git/gcc/tree-vectorizer.c:1162
Code derived from the Linux kernel.
I will have a go at reducing the code.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/103977] ice in try_vectorize_loop_1
2022-01-11 12:10 [Bug c/103977] New: ice in try_vectorize_loop_1 dcb314 at hotmail dot com
@ 2022-01-11 12:17 ` jakub at gcc dot gnu.org
2022-01-11 12:43 ` [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af dcb314 at hotmail dot com
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-01-11 12:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103977
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |tree-optimization
Target Milestone|--- |12.0
Ever confirmed|0 |1
CC| |avieira at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
Status|UNCONFIRMED |NEW
Priority|P3 |P1
Last reconfirmed| |2022-01-11
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-11 12:10 [Bug c/103977] New: ice in try_vectorize_loop_1 dcb314 at hotmail dot com
2022-01-11 12:17 ` [Bug tree-optimization/103977] " jakub at gcc dot gnu.org
@ 2022-01-11 12:43 ` dcb314 at hotmail dot com
2022-01-11 12:59 ` rguenth at gcc dot gnu.org
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: dcb314 at hotmail dot com @ 2022-01-11 12:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103977
--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Reduced C source code is
int *freelist_randomize_list;
int cache_random_seq_create_count_i;
void cache_random_seq_create_count() {
for (; cache_random_seq_create_count_i; cache_random_seq_create_count_i++)
freelist_randomize_list[cache_random_seq_create_count_i] =
cache_random_seq_create_count_i;
}
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-11 12:10 [Bug c/103977] New: ice in try_vectorize_loop_1 dcb314 at hotmail dot com
2022-01-11 12:17 ` [Bug tree-optimization/103977] " jakub at gcc dot gnu.org
2022-01-11 12:43 ` [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af dcb314 at hotmail dot com
@ 2022-01-11 12:59 ` rguenth at gcc dot gnu.org
2022-01-11 23:30 ` law at gcc dot gnu.org
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-01-11 12:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103977
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
/* For epilogues start the analysis from the first mode. The motivation
behind starting from the beginning comes from cases where the VECTOR_MODES
array may contain length-agnostic and length-specific modes. Their
ordering is not guaranteed, so we could end up picking a mode for the main
loop that is after the epilogue's optimal mode. */
mode_i = 1;
that's only valid if vector_modes.length () > 1 but for the testcase it only
contains the artificial VOIDmode aka autodetect mode. I wonder why
we don't start from 0?
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-11 12:10 [Bug c/103977] New: ice in try_vectorize_loop_1 dcb314 at hotmail dot com
` (2 preceding siblings ...)
2022-01-11 12:59 ` rguenth at gcc dot gnu.org
@ 2022-01-11 23:30 ` law at gcc dot gnu.org
2022-01-12 10:20 ` avieira at gcc dot gnu.org
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: law at gcc dot gnu.org @ 2022-01-11 23:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103977
Jeffrey A. Law <law at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at gcc dot gnu.org
--- Comment #4 from Jeffrey A. Law <law at gcc dot gnu.org> ---
FWIW, the patch Jakub identified is causing similar testsuite regressions
across ~30 targets at this point.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-11 12:10 [Bug c/103977] New: ice in try_vectorize_loop_1 dcb314 at hotmail dot com
` (3 preceding siblings ...)
2022-01-11 23:30 ` law at gcc dot gnu.org
@ 2022-01-12 10:20 ` avieira at gcc dot gnu.org
2022-01-12 16:04 ` law at gcc dot gnu.org
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: avieira at gcc dot gnu.org @ 2022-01-12 10:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103977
--- Comment #5 from avieira at gcc dot gnu.org ---
Posted a fix on ML:
https://gcc.gnu.org/pipermail/gcc-patches/2022-January/588237.html
Sorry for the breakage, wrong assumption by my part :(
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-11 12:10 [Bug c/103977] New: ice in try_vectorize_loop_1 dcb314 at hotmail dot com
` (4 preceding siblings ...)
2022-01-12 10:20 ` avieira at gcc dot gnu.org
@ 2022-01-12 16:04 ` law at gcc dot gnu.org
2022-01-12 16:10 ` avieira at gcc dot gnu.org
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: law at gcc dot gnu.org @ 2022-01-12 16:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103977
--- Comment #6 from Jeffrey A. Law <law at gcc dot gnu.org> ---
And just to follow-up. With the patch that was committed to the trunk, the 30+
targets that were previously failing are now working.
A few are still building, but I expect them to succeed. mips* is failing, but
I suspect it's the recent allocator changes, not the vectorizer changes causing
problems.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-11 12:10 [Bug c/103977] New: ice in try_vectorize_loop_1 dcb314 at hotmail dot com
` (5 preceding siblings ...)
2022-01-12 16:04 ` law at gcc dot gnu.org
@ 2022-01-12 16:10 ` avieira at gcc dot gnu.org
2022-01-12 16:17 ` avieira at gcc dot gnu.org
2022-01-13 7:13 ` rguenth at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: avieira at gcc dot gnu.org @ 2022-01-12 16:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103977
--- Comment #7 from avieira at gcc dot gnu.org ---
Thanks for confirming that Jeff :)
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-11 12:10 [Bug c/103977] New: ice in try_vectorize_loop_1 dcb314 at hotmail dot com
` (6 preceding siblings ...)
2022-01-12 16:10 ` avieira at gcc dot gnu.org
@ 2022-01-12 16:17 ` avieira at gcc dot gnu.org
2022-01-13 7:13 ` rguenth at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: avieira at gcc dot gnu.org @ 2022-01-12 16:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103977
--- Comment #8 from avieira at gcc dot gnu.org ---
The patch Jeff mentioned is this:
[vect] PR103971, PR103977: Fix epilogue mode selection for autodetect only
gcc/ChangeLog:
* tree-vect-loop.c (vect-analyze-loop): Handle scenario where target
does not add autovectorize_vector_modes.
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=016bd7523131b645bca5b5530c81ab5149922743
Should be OK to close this now?
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af
2022-01-11 12:10 [Bug c/103977] New: ice in try_vectorize_loop_1 dcb314 at hotmail dot com
` (7 preceding siblings ...)
2022-01-12 16:17 ` avieira at gcc dot gnu.org
@ 2022-01-13 7:13 ` rguenth at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-01-13 7:13 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103977
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2022-01-13 7:13 UTC | newest]
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2022-01-11 12:10 [Bug c/103977] New: ice in try_vectorize_loop_1 dcb314 at hotmail dot com
2022-01-11 12:17 ` [Bug tree-optimization/103977] " jakub at gcc dot gnu.org
2022-01-11 12:43 ` [Bug tree-optimization/103977] [12 Regression] ice in try_vectorize_loop_1 since r12-6420-gd3ff7420e941931d32ce2e332e7968fe67ba20af dcb314 at hotmail dot com
2022-01-11 12:59 ` rguenth at gcc dot gnu.org
2022-01-11 23:30 ` law at gcc dot gnu.org
2022-01-12 10:20 ` avieira at gcc dot gnu.org
2022-01-12 16:04 ` law at gcc dot gnu.org
2022-01-12 16:10 ` avieira at gcc dot gnu.org
2022-01-12 16:17 ` avieira at gcc dot gnu.org
2022-01-13 7:13 ` rguenth at gcc dot gnu.org
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