[Bug tree-optimization/94163] [8/9 Regression] ICE in set_ptr_info_alignment with -O2 and __builtin_assume_aligned

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94163

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
E.g. in tree-ssa-ccp.c, we drop very large alignments on the floor.
          /* Trailing mask bits specify the alignment, trailing value
             bits the misalignment.  */
          tem = val->mask.to_uhwi ();
          align = least_bit_hwi (tem);
int *
foo (int *p)
{
  p = (int *) ((__UINTPTR_TYPE__) p & 0xfffffff000000000ULL);
  (*p)++;
  return p;
}
because tem is unsigned int and so will be 0, align 0 too and so align > 1 will
not be true.