[Bug tree-optimization/95663] static_cast checks for null even when the pointer is dereferenced

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95663

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Or to be more clear:

struct Large {
  char pad[1024*1024];
  int x;
};

Large* p = 0;
int i = p->x;