A unified interprocedural program representation for a maintenance environment

A unified interprocedural program representation, the unified interprocedural graph (UIG) is presented; it combines the features of existing program representations to permit access to information for modifying, understanding, analyzing, testing and debugging. The algorithms developed for each of these independent graphs are adapted to use this unified representation by identifying the subset of nodes and edges required for that computation. The UIG can be incorporated into a maintenance environment and the associated algorithms used to build program maintenance tools. The authors present a brief overview of the graph representations on which the UIG is based and illustrate them with an example. The algorithms that use these graphs to gather the interprocedural information are described