o = new OPT_LocationOperand(JTOCindex);
o = new OPT_LocationOperand(JTOCoffset);
  public OPT_Operand copy() {    OPT_LocationOperand o = null;    switch (type) {    case FIELD_ACCESS:         o = new OPT_LocationOperand(fieldRef);       break;    case ARRAY_ACCESS:         o = new OPT_LocationOperand(arrayElementType);       break;    case JTOC_ACCESS:          o = new OPT_LocationOperand(JTOCindex);       break;    case SPILL_ACCESS:         o = new OPT_LocationOperand(spillOffset);       break;    case ALENGTH_ACCESS:       o = new OPT_LocationOperand();       break;    case METHOD_ACCESS:        o = new OPT_LocationOperand(methOp);      break;    default:      o = new OPT_LocationOperand();       break;    }    return o;  }