int disp,
Offset disp,
  public OPT_MemoryOperand(OPT_RegisterOperand base,                     OPT_RegisterOperand index,                    byte scale,                    int disp,                    byte size,                    OPT_LocationOperand loc,                    OPT_Operand guard) {    this.loc = loc;    this.guard = guard;    this.base = base;    this.index = index;    this.scale = scale;    this.disp = disp;    this.size = size;    if (loc != null) loc.instruction = null;    if (guard != null) guard.instruction = null;    if (base != null) base.instruction = null;    if (index != null) index.instruction = null;  }