[Bug tree-optimization/111727] New: wrong code at -O3 on x86_64-linux-gnu

[zhendong.su at inf dot ethz.ch via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111727

            Bug ID: 111727
           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: ---

Compiler Explorer: https://godbolt.org/z/xherWE8x6

It might be related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111652.

[508] % 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/14.0.0/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 20231008 (experimental) (GCC) 
[509] % 
[509] % gcctk -O2 small.c; ./a.out
[510] % 
[510] % gcctk -O3 small.c
[511] % ./a.out
Aborted
[512] % cat small.c
int a, b, c;
int main() {
  for (; a < 2; a += 2) {
    for (b = 0; b < 1; b++)
      if (a < 1)
        c = 0;
    for (; c < 1; c++)
      ;
    }
  if (a != 2)
    __builtin_abort();
  return 0;
}