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* [Bug tree-optimization/111652] New: wrong code at -O3 on x86_64-linux-gnu
@ 2023-10-01 11:59 zhendong.su at inf dot ethz.ch
  2023-10-01 16:18 ` [Bug tree-optimization/111652] [14 Regression] " pinskia at gcc dot gnu.org
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: zhendong.su at inf dot ethz.ch @ 2023-10-01 11:59 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111652

            Bug ID: 111652
           Summary: wrong code at -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/89h8W1Pvs

[505] % 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 --enable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20231001 (experimental) (GCC) 
[506] % 
[506] % gcctk -O2 small.c; ./a.out
[507] % 
[507] % gcctk -O3 small.c
[508] % ./a.out
Aborted
[509] % 
[509] % cat small.c
volatile int a;
int b;
int main() {
  for (; b < 5; b += 3) {
    b && a;
    if (b < 4)
      a--;
  }
  if (b != 6)
    __builtin_abort();
  return 0;
}

^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2023-11-14 14:16 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-10-01 11:59 [Bug tree-optimization/111652] New: wrong code at -O3 on x86_64-linux-gnu zhendong.su at inf dot ethz.ch
2023-10-01 16:18 ` [Bug tree-optimization/111652] [14 Regression] " pinskia at gcc dot gnu.org
2023-10-01 16:32 ` pinskia at gcc dot gnu.org
2023-10-02 17:58 ` tkoenig at gcc dot gnu.org
2023-10-02 19:51 ` ppalka at gcc dot gnu.org
2023-10-02 20:29 ` pinskia at gcc dot gnu.org
2023-10-04  9:26 ` rguenth at gcc dot gnu.org
2023-11-14 14:13 ` [Bug tree-optimization/111652] [14 Regression] wrong code at -O3 on x86_64-linux-gnu since r14-2852-gf5fb9ff2396fd4 cvs-commit at gcc dot gnu.org
2023-11-14 14:16 ` rguenth at gcc dot gnu.org

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