综合报警信息

从其他模块输入过来的数据信号的高位没有用到，综合时老是出现报警信息，大家都是怎么处理的啊，数据的高位又不能移除，不管它会影响布局布线吧,是不是要加个寄存器寄存一下呢
Input <DATA_OUT2<31:24>> is never used. This port will be preserved and left unconnected if it belongs to a top-level block or it belongs to a sub-block and the hierarchy of this sub-block is preserved.

Node <row_0> of sequential type is unconnected in block ...