Programmable logic circuit apparatus and programmable logic circuit reconfiguration method

A programmable logic circuit apparatus includes a programmable logic circuit that dynamically switches and operates a plurality of circuit blocks. The circuit blocks include a branch circuit block that performs branch processing and a plurality of child circuit blocks that selectively perform a plurality of kinds of processing on data obtained by the branch circuit block. The apparatus also includes a storage unit that stores data obtained by the branch circuit block and an identifier of a child circuit block into which the data is input. The identifier is associated with the data. The apparatus also includes a controller that causes the programmable logic circuit to process data associated with the same identifier as an identifier of a child circuit block being in operation in the programmable logic circuit, among the data stored in the storage unit, in preference to data associated with identifiers of other child circuit blocks.