1. A hierarchical interface module embodied on a non-transitory computer readable medium that directs operation of a processor when initiated, comprising: an assessment unit configured to identify an internal structure of a partitioned block of an integrated circuit (IC) that is incompatible with a hierarchical implementation of the IC; and an interface unit configured to substitute within the partitioned block a directly registered hierarchical interface structure for the internal structure identified as incompatible, wherein the directly registered hierarchical interface structure includes at least one input structure which directly corresponds to at least one output structure within the partitioned block or at least one output structure which directly corresponds to at least one input structure within the partitioned block.