1. System LSI design support apparatus which supports a design for assigning system features to a system LSI comprising processing units having a plurality of different architectures, said apparatus having as an input a program describing system features in a high-level language, comprising: a function extractor, which extracts functions described in the program; an analyzer, which counts the number of conditional branch statements described in each function extracted by the function extractor; and a calculation section, which outputs calculation result information based on the counting results of the analyzer for each function extracted by the function extractor.