Comparing Flow- and Context-Sensitivity on the Modification Side-effects Problem

Precision and scalability are two desirable, yet often conflicting, features of data-flow analyses. This paper reports on a case study of the modification-side-effects problem for C in the presence of pointers from the perspective of contrasting the flow and context sensitivity of the solution procedure with respect to precision and scalability. The results show that the cost of precision of flow- and context-sensitive analysis is not always prohibitive, and that the precision of flow- and context-insensitive analysis is substantially better than worst case estimates and can be sufficient for certain applications. Program characteristics that affect the performance of dataflow analysis are identified.Technical report DCS-TR-33