re PR target/33132 (m32r: ICE: RTL check: expected elt 0 type 'i' or 'n', have 'w' (rtx const_int) in insn_current_length, at insn-attrtab.c:29)

PR target/33132
* config/m32r/constraints.md: Add W constraint for integer zero.
* config/m32r/m32r.md (get_pc): Use W and i constraints.
  Fix length calculation by using alternatives.

From-SVN: r127992