return UNCHANGED;
return DefUseEffect.UNCHANGED;
  private static byte longCmp(OPT_Instruction s) {   if (CF_LONG) {      OPT_Operand op1 = Binary.getVal1(s);      OPT_Operand op2 = Binary.getVal2(s);      if (op1.similar(op2)) {        // THE SAME OPERAND: op1 == op2        Move.mutate(s, INT_MOVE, Binary.getClearResult(s),                     IC(0));        return MOVE_FOLDED;      }      if (op2.isLongConstant()) {        if (op1.isLongConstant()) {          // BOTH CONSTANTS: FOLD          long val1 = op1.asLongConstant().value;          long val2 = op2.asLongConstant().value;          int result = (val1 > val2) ? 1 : ((val1 == val2) ? 0 : -1);          Move.mutate(s, INT_MOVE, Binary.getClearResult(s), IC(result));          return MOVE_FOLDED;        }      }    }    return UNCHANGED;  }