[Bug tree-optimization/116579] New: wrong code at -O{2,3} with "-fno-thread-jumps" on x86_64-linux-gnu

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116579

            Bug ID: 116579
           Summary: wrong code at -O{2,3} with "-fno-thread-jumps" 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/ocnbjba4c

It appears to be a recent regression as it doesn't reproduce with 14.2 and
earlier. 

[517] % 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/15.0.0/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 15.0.0 20240903 (experimental) (GCC) 
[518] % 
[518] % gcctk -O2 small.c; ./a.out
[519] % 
[519] % gcctk -O2 -fno-thread-jumps small.c
[520] % ./a.out
Aborted
[521] % 
[521] % cat small.c
int a, c, d, e;
char b;
long f;
int main() {
  unsigned char g;
  int h = -2, i = 0;
  g = a + 128;
  d = 0 <= (c || (h = g));
  f = h < 0 || i >= 32 ? h : 0;
  (b = h) | (e = f);
  if (e != 0)
    __builtin_abort();
  return 0;
}