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* [Bug rtl-optimization/97851] New: aarch64: Wrong code with -Os -fmodulo-sched since r7-879-g43c0068e60
@ 2020-11-16 14:45 acoplan at gcc dot gnu.org
2020-11-16 15:25 ` [Bug rtl-optimization/97851] " rguenth at gcc dot gnu.org
2020-11-20 10:55 ` zhroma at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: acoplan at gcc dot gnu.org @ 2020-11-16 14:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97851
Bug ID: 97851
Summary: aarch64: Wrong code with -Os -fmodulo-sched since
r7-879-g43c0068e60
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: acoplan at gcc dot gnu.org
Target Milestone: ---
AArch64 GCC miscompiles the following testcase:
int a, b, c;
short d;
void e(void) {
unsigned f = 0;
for (; f <= 2; f++) {
int g[1];
int h = (long)g;
c = 0;
for (; c < 10; c++)
g[0] = a = 0;
for (; a <= 2; a++)
b = d;
}
}
int main(void) {
e();
if (a != 3)
__builtin_abort();
}
with -Os -fmodulo-sched since r7-879-g43c0068e60ad1518cc6196eeac51eb811fe62f8f.
It seems likely that this is just a latent bug revealed by the above revision,
however (hence tagging as rtl-optimization). Possibly related to PR97440 or
PR97421.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug rtl-optimization/97851] aarch64: Wrong code with -Os -fmodulo-sched since r7-879-g43c0068e60
2020-11-16 14:45 [Bug rtl-optimization/97851] New: aarch64: Wrong code with -Os -fmodulo-sched since r7-879-g43c0068e60 acoplan at gcc dot gnu.org
@ 2020-11-16 15:25 ` rguenth at gcc dot gnu.org
2020-11-20 10:55 ` zhroma at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-11-16 15:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97851
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zhroma at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Indeed.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug rtl-optimization/97851] aarch64: Wrong code with -Os -fmodulo-sched since r7-879-g43c0068e60
2020-11-16 14:45 [Bug rtl-optimization/97851] New: aarch64: Wrong code with -Os -fmodulo-sched since r7-879-g43c0068e60 acoplan at gcc dot gnu.org
2020-11-16 15:25 ` [Bug rtl-optimization/97851] " rguenth at gcc dot gnu.org
@ 2020-11-20 10:55 ` zhroma at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: zhroma at gcc dot gnu.org @ 2020-11-20 10:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97851
Roman Zhuykov <zhroma at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |DUPLICATE
Status|UNCONFIRMED |RESOLVED
--- Comment #2 from Roman Zhuykov <zhroma at gcc dot gnu.org> ---
(In reply to Alex Coplan from comment #0)
> Possibly related to PR97440 or PR97421.
Yep, all those are actually duplicates.
Thanks Richard for CCing!
*** This bug has been marked as a duplicate of bug 97421 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-11-20 10:55 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2020-11-16 14:45 [Bug rtl-optimization/97851] New: aarch64: Wrong code with -Os -fmodulo-sched since r7-879-g43c0068e60 acoplan at gcc dot gnu.org
2020-11-16 15:25 ` [Bug rtl-optimization/97851] " rguenth at gcc dot gnu.org
2020-11-20 10:55 ` zhroma at gcc dot gnu.org
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