[Bug debug/118790] [15 Regression] ICE when building fiat (crash in loc_list_from_tree_1)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118790

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
    case MEM_REF:
      if (!integer_zerop (TREE_OPERAND (loc, 1)))
        {
          have_address = 1;
          goto do_plus;
        }
      /* Fallthru.  */
    case INDIRECT_REF:
      list_ret = loc_list_from_tree_1 (TREE_OPERAND (loc, 0), 0, context);
      have_address = 1;
      break;


And then the crash is at:
  switch (TREE_CODE (loc))

Which means there is a null for either MEM_REF/INDIRECT_REF