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* [Bug target/98917] New: SVE: wrong code with -O -ftree-vectorize -msve-vector-bits=128 --param=aarch64-autovec-preference=2
@ 2021-02-01 13:09 acoplan at gcc dot gnu.org
2021-02-01 14:01 ` [Bug target/98917] " ktkachov at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: acoplan at gcc dot gnu.org @ 2021-02-01 13:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98917
Bug ID: 98917
Summary: SVE: wrong code with -O -ftree-vectorize
-msve-vector-bits=128
--param=aarch64-autovec-preference=2
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: acoplan at gcc dot gnu.org
Target Milestone: ---
Created attachment 50109
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50109&action=edit
reduced testcase
The attached C++ testcase appears to be miscompiled with -O -ftree-vectorize
-march=armv8.2-a+sve -msve-vector-bits=128
--param=aarch64-autovec-preference=2.
The testcase comes from YARPGen and is hard to reduce. It runs fine
with/without sanitizers at various optimisation levels under GCC/clang for both
x86 and aarch64 but segfaults with the above options on trunk.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug target/98917] SVE: wrong code with -O -ftree-vectorize -msve-vector-bits=128 --param=aarch64-autovec-preference=2 2021-02-01 13:09 [Bug target/98917] New: SVE: wrong code with -O -ftree-vectorize -msve-vector-bits=128 --param=aarch64-autovec-preference=2 acoplan at gcc dot gnu.org @ 2021-02-01 14:01 ` ktkachov at gcc dot gnu.org 2021-02-01 14:21 ` acoplan at gcc dot gnu.org 2021-03-30 16:05 ` rsandifo at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: ktkachov at gcc dot gnu.org @ 2021-02-01 14:01 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98917 ktkachov at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ktkachov at gcc dot gnu.org --- Comment #1 from ktkachov at gcc dot gnu.org --- Is this a 11 regression? ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/98917] SVE: wrong code with -O -ftree-vectorize -msve-vector-bits=128 --param=aarch64-autovec-preference=2 2021-02-01 13:09 [Bug target/98917] New: SVE: wrong code with -O -ftree-vectorize -msve-vector-bits=128 --param=aarch64-autovec-preference=2 acoplan at gcc dot gnu.org 2021-02-01 14:01 ` [Bug target/98917] " ktkachov at gcc dot gnu.org @ 2021-02-01 14:21 ` acoplan at gcc dot gnu.org 2021-03-30 16:05 ` rsandifo at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: acoplan at gcc dot gnu.org @ 2021-02-01 14:21 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98917 --- Comment #2 from Alex Coplan <acoplan at gcc dot gnu.org> --- (In reply to ktkachov from comment #1) > Is this a 11 regression? It's hard to tell given the dependency on --param=aarch64-autovec-preference=2. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/98917] SVE: wrong code with -O -ftree-vectorize -msve-vector-bits=128 --param=aarch64-autovec-preference=2 2021-02-01 13:09 [Bug target/98917] New: SVE: wrong code with -O -ftree-vectorize -msve-vector-bits=128 --param=aarch64-autovec-preference=2 acoplan at gcc dot gnu.org 2021-02-01 14:01 ` [Bug target/98917] " ktkachov at gcc dot gnu.org 2021-02-01 14:21 ` acoplan at gcc dot gnu.org @ 2021-03-30 16:05 ` rsandifo at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rsandifo at gcc dot gnu.org @ 2021-03-30 16:05 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98917 rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |DUPLICATE Status|UNCONFIRMED |RESOLVED CC| |rsandifo at gcc dot gnu.org --- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> --- Same underlying problem as PR99102. *** This bug has been marked as a duplicate of bug 99102 *** ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-03-30 16:05 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-02-01 13:09 [Bug target/98917] New: SVE: wrong code with -O -ftree-vectorize -msve-vector-bits=128 --param=aarch64-autovec-preference=2 acoplan at gcc dot gnu.org 2021-02-01 14:01 ` [Bug target/98917] " ktkachov at gcc dot gnu.org 2021-02-01 14:21 ` acoplan at gcc dot gnu.org 2021-03-30 16:05 ` rsandifo at gcc dot gnu.org
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