[Bug rtl-optimization/110391] [12/13/14 Regression] wrong code at -O2 and -O3 with "-fsel-sched-pipelining -fselective-scheduling2" on x86_64-linux-gnu

["zhendong.su at inf dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110391

--- Comment #3 from Zhendong Su <zhendong.su at inf dot ethz.ch> ---
Another related reproducer. 

Compiler Explorer: https://godbolt.org/z/E8GPcfPY5


[543] % 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 20230629 (experimental) [master r14-924-gd709841ae0f] (GCC) 
[544] % 
[544] % gcctk -O2 -fselective-scheduling2 small.c
[545] % timeout -s 9 5 ./a.out
Killed
[546] % 
[546] % gcctk -O1 small.c; ./a.out
[547] % 
[547] % cat small.c
int printf(const char *, ...);
int a = -1, b = 1, *c = &a;
int main() {
  *c |= 1;
  if (a) {
  L:
    if (a < -1)
      printf("%d", 0);
    if (!b) {
      printf("%d", 1);
      goto L;
    }
    if (a > 0)
      goto L;
    b = 0;
  }
  return 0;
}