[Bug tree-optimization/120903] Alias information not used to optimize out hand-written buffer aliasing checks

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120903

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
With `char*` GCC has:
  _7 = a_2(D) < &MEM <uint32_t> [(void *)&r + 4B];
  _4 = a_2(D) > &r;
  _9 = _4 & _7;

But we only optimize ==/!= for aliasing IIRC.