[Bug middle-end/110282] Segmentation fault with specific optimizations

[19373742 at buaa dot edu.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110282

--- Comment #6 from CTC <19373742 at buaa dot edu.cn> ---
Another related and smaller reproducer:

# cat tmp.i
main() {
  int *a = 0;
  int b = *a;
}