public PNode(PCode ins)
{
INS = ins;
}
/// <summary>
/// Type: 1:立即数，2:临时变量，3:变量，4:地址, 5:类型
/// </summary>
/// <param name="ins"></param>
/// <param name="arg"></param>
/// <param name="type"> </param>
public PNode(PCode ins, int arg, int type)
{
DataType = type;
Arg = arg;
INS = ins;
}