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* [Bug tree-optimization/114796] New: wrong code at -O2 with "-fno-tree-fre -fno-inline -fselective-scheduling2" on x86_64-linux-gnu
@ 2024-04-21 16:32 zhendong.su at inf dot ethz.ch
2024-04-21 19:56 ` [Bug tree-optimization/114796] [11/12/13/14 Regression] " hjl.tools at gmail dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: zhendong.su at inf dot ethz.ch @ 2024-04-21 16:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114796
Bug ID: 114796
Summary: wrong code at -O2 with "-fno-tree-fre -fno-inline
-fselective-scheduling2" 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: ---
This seems quite long-latent and affects all versions 9.* and later.
Compiler Explorer: https://godbolt.org/z/nKx6f4hjK
[526] % gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/local/suz-local/software/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/14.0.1/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 --enable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.1 20240421 (experimental) (GCC)
[527] %
[527] % gcctk -O0 small.c
[528] % ./a.out
[529] %
[529] % gcctk -O2 -fno-tree-fre -fno-inline -fselective-scheduling2 small.c
[530] % ./a.out
Aborted
[531] %
[531] % cat small.c
int printf(const char *, ...);
int a, b, c = -3, h, j, k;
struct d {
int e;
char f;
char g;
};
int i, l, m;
char n[10][9] = {{1}};
struct d o = {1,0,0};
unsigned p;
void q(int s) { b = a; }
void r() {
k = 0;
while (k)
while (l)
while (i)
if (m)
while (1)
;
for (; p < 1; p++) {
if (j) {
q(n[j][c]);
if (h)
printf("\n");
}
n[p][k] = 1;
}
}
int main() {
r();
if (o.g != 0)
__builtin_abort();
return 0;
}
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/114796] [11/12/13/14 Regression] wrong code at -O2 with "-fno-tree-fre -fno-inline -fselective-scheduling2" on x86_64-linux-gnu
2024-04-21 16:32 [Bug tree-optimization/114796] New: wrong code at -O2 with "-fno-tree-fre -fno-inline -fselective-scheduling2" on x86_64-linux-gnu zhendong.su at inf dot ethz.ch
@ 2024-04-21 19:56 ` hjl.tools at gmail dot com
2024-04-21 20:00 ` [Bug rtl-optimization/114796] " pinskia at gcc dot gnu.org
2024-04-22 7:14 ` jakub at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: hjl.tools at gmail dot com @ 2024-04-21 19:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114796
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|wrong code at -O2 with |[11/12/13/14 Regression]
|"-fno-tree-fre -fno-inline |wrong code at -O2 with
|-fselective-scheduling2" on |"-fno-tree-fre -fno-inline
|x86_64-linux-gnu |-fselective-scheduling2" on
| |x86_64-linux-gnu
Last reconfirmed| |2024-04-21
CC| |abel at gcc dot gnu.org
Status|UNCONFIRMED |NEW
Version|unknown |14.0
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
This is caused by r9-6789.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/114796] [11/12/13/14 Regression] wrong code at -O2 with "-fno-tree-fre -fno-inline -fselective-scheduling2" on x86_64-linux-gnu
2024-04-21 16:32 [Bug tree-optimization/114796] New: wrong code at -O2 with "-fno-tree-fre -fno-inline -fselective-scheduling2" on x86_64-linux-gnu zhendong.su at inf dot ethz.ch
2024-04-21 19:56 ` [Bug tree-optimization/114796] [11/12/13/14 Regression] " hjl.tools at gmail dot com
@ 2024-04-21 20:00 ` pinskia at gcc dot gnu.org
2024-04-22 7:14 ` jakub at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-04-21 20:00 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114796
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|tree-optimization |rtl-optimization
Target Milestone|--- |11.5
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/114796] [11/12/13/14 Regression] wrong code at -O2 with "-fno-tree-fre -fno-inline -fselective-scheduling2" on x86_64-linux-gnu
2024-04-21 16:32 [Bug tree-optimization/114796] New: wrong code at -O2 with "-fno-tree-fre -fno-inline -fselective-scheduling2" on x86_64-linux-gnu zhendong.su at inf dot ethz.ch
2024-04-21 19:56 ` [Bug tree-optimization/114796] [11/12/13/14 Regression] " hjl.tools at gmail dot com
2024-04-21 20:00 ` [Bug rtl-optimization/114796] " pinskia at gcc dot gnu.org
@ 2024-04-22 7:14 ` jakub at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: jakub at gcc dot gnu.org @ 2024-04-22 7:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114796
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Priority|P3 |P2
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-04-22 7:14 UTC | newest]
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2024-04-21 16:32 [Bug tree-optimization/114796] New: wrong code at -O2 with "-fno-tree-fre -fno-inline -fselective-scheduling2" on x86_64-linux-gnu zhendong.su at inf dot ethz.ch
2024-04-21 19:56 ` [Bug tree-optimization/114796] [11/12/13/14 Regression] " hjl.tools at gmail dot com
2024-04-21 20:00 ` [Bug rtl-optimization/114796] " pinskia at gcc dot gnu.org
2024-04-22 7:14 ` jakub at gcc dot gnu.org
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