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* [Bug tree-optimization/110365] New: wrong code at -O2 and -O3 on x86_64-linux-gnu
@ 2023-06-22 14:58 zhendong.su at inf dot ethz.ch
2023-06-22 15:34 ` [Bug tree-optimization/110365] " pinskia at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: zhendong.su at inf dot ethz.ch @ 2023-06-22 14:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110365
Bug ID: 110365
Summary: wrong code at -O2 and -O3 on x86_64-linux-gnu
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zhendong.su at inf dot ethz.ch
Target Milestone: ---
It appears to be a recent regression.
Compiler Explorer: https://godbolt.org/z/aP9aMrsGq
[725] % gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/local/home/suz/suz-local/software/local/gcc-trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--enable-checking=yes --prefix=/local/suz-local/software/local/gcc-trunk
--enable-sanitizers --enable-languages=c,c++ --disable-werror
--disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20230622 (experimental) [master r14-924-gd709841ae0f] (GCC)
[726] %
[726] % gcctk -O1 small.c; ./a.out
[727] %
[727] % gcctk -O2 small.c
[728] % ./a.out
Aborted
[729] %
[729] % cat small.c
int a = 1;
void b() {
int *c = &a, d = a;
if (a < -1)
d = a + d;
a = d;
if (a > 0)
*c = 1;
int e = -a;
if (e < a) {
e = a;
if (!a)
__builtin_abort();
}
a = e;
}
int main() {
b();
if (a != 1)
__builtin_abort();
return 0;
}
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/110365] wrong code at -O2 and -O3 on x86_64-linux-gnu
2023-06-22 14:58 [Bug tree-optimization/110365] New: wrong code at -O2 and -O3 on x86_64-linux-gnu zhendong.su at inf dot ethz.ch
@ 2023-06-22 15:34 ` pinskia at gcc dot gnu.org
2023-06-22 15:36 ` pinskia at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-06-22 15:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110365
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
phiopt match-simplify trying:
d_6 > 0 ? 1 : e_1
Matching expression match.pd:1990, gimple-match-5.cc:23
Matching expression match.pd:1990, gimple-match-5.cc:23
Applying pattern match.pd:4742, gimple-match-2.cc:16205
Folded into the sequence:
_16 = d_6 > 0;
_8 = (int) _16;
_13 = e_1 | _8;
statement un-sinked:
e_1 = -d_6;
Removing basic block 5
;; basic block 5, loop depth 0
;; pred: 4
;; succ: 6
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/110365] wrong code at -O2 and -O3 on x86_64-linux-gnu
2023-06-22 14:58 [Bug tree-optimization/110365] New: wrong code at -O2 and -O3 on x86_64-linux-gnu zhendong.su at inf dot ethz.ch
2023-06-22 15:34 ` [Bug tree-optimization/110365] " pinskia at gcc dot gnu.org
@ 2023-06-22 15:36 ` pinskia at gcc dot gnu.org
2023-06-22 18:41 ` zhendong.su at inf dot ethz.ch
2023-06-22 21:45 ` pinskia at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-06-22 15:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110365
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Duplicate of bug 110252 really.
*** This bug has been marked as a duplicate of bug 110252 ***
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/110365] wrong code at -O2 and -O3 on x86_64-linux-gnu
2023-06-22 14:58 [Bug tree-optimization/110365] New: wrong code at -O2 and -O3 on x86_64-linux-gnu zhendong.su at inf dot ethz.ch
2023-06-22 15:34 ` [Bug tree-optimization/110365] " pinskia at gcc dot gnu.org
2023-06-22 15:36 ` pinskia at gcc dot gnu.org
@ 2023-06-22 18:41 ` zhendong.su at inf dot ethz.ch
2023-06-22 21:45 ` pinskia at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: zhendong.su at inf dot ethz.ch @ 2023-06-22 18:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110365
--- Comment #3 from Zhendong Su <zhendong.su at inf dot ethz.ch> ---
(In reply to Andrew Pinski from comment #2)
> Duplicate of bug 110252 really.
>
> *** This bug has been marked as a duplicate of bug 110252 ***
Sorry about the dup, and thanks for triaging it.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/110365] wrong code at -O2 and -O3 on x86_64-linux-gnu
2023-06-22 14:58 [Bug tree-optimization/110365] New: wrong code at -O2 and -O3 on x86_64-linux-gnu zhendong.su at inf dot ethz.ch
` (2 preceding siblings ...)
2023-06-22 18:41 ` zhendong.su at inf dot ethz.ch
@ 2023-06-22 21:45 ` pinskia at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-06-22 21:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110365
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Zhendong Su from comment #3)
> Sorry about the dup, and thanks for triaging it.
I really should fix PR 110252 before more different new testcases are produced.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-06-22 21:45 UTC | newest]
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2023-06-22 14:58 [Bug tree-optimization/110365] New: wrong code at -O2 and -O3 on x86_64-linux-gnu zhendong.su at inf dot ethz.ch
2023-06-22 15:34 ` [Bug tree-optimization/110365] " pinskia at gcc dot gnu.org
2023-06-22 15:36 ` pinskia at gcc dot gnu.org
2023-06-22 18:41 ` zhendong.su at inf dot ethz.ch
2023-06-22 21:45 ` pinskia at gcc dot gnu.org
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