[Bug debug/32563] [4.2/4.3 regression] ICE on pointer arithmetic

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2007-08-20 08:38 -------
The difference comes from:
  /* If OFFSET is constant, see if we can return the whole thing as a
     constant bit position.  Otherwise, split it up.  */
  if (host_integerp (offset, 0)
      && 0 != (tem = size_binop (MULT_EXPR,
                                 fold_convert (bitsizetype, offset),
                                 bitsize_unit_node))
      && 0 != (tem = size_binop (PLUS_EXPR, tem, bit_offset))
      && host_integerp (tem, 0))
    *pbitpos = tree_low_cst (tem, 0), *poffset = 0;
  else
    *pbitpos = tree_low_cst (bit_offset, 0), *poffset = offset;


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32563