private static byte intNot(OPT_Instruction s) {
private static DefUseEffect intNot(OPT_Instruction s) {
  private static byte intNot(OPT_Instruction s) {   if (CF_INT) {      OPT_Operand op = Unary.getVal(s);      if (op.isIntConstant()) {        // CONSTANT: FOLD        int val = op.asIntConstant().value;        Move.mutate(s, INT_MOVE, Unary.getClearResult(s), IC(~val));        return MOVE_FOLDED;      }    }    return UNCHANGED;  }