ID:236042 If the same driver feeds multiple ports of a partition, those ports are logically equivalent. However, because inter-partition optimizations are forbidden, the compilation of that partition cannot take advantage of this fact and the ports can no longer be merged. For example, if a single clock is used to drive the read and write clocks of the RAM block and if the RAM block is compiled separately in a bottom-up design flow, it appears that there are two unique clocks when there is really only one.