[Bug tree-optimization/78788] [7 Regression] ICE (segfault) on s390x-linux-gnu

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78788

--- Comment #4 from Matthias Klose <doko at gcc dot gnu.org> ---
$ cat ghosts.i
int a;
long b;
long c;
void d() {
  int e = 0;
  for (; b; b++)
    if (c) {
      e++;
      e++;
    }
  while (e)
    a = e -= 2;
}