[Bug tree-optimization/92689] Improve stmt_may_clobber_ref_p_1 on constant memory reference

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92689

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Actually the testcase which causes the return true to be correct would be:
extern int data;
void gggg(void)
{
  foo (&data);
}

void fn(void)
{
  data++;
}
---- CUT ---
I think you need either a better testcase again.