A Program Data Flow Analysis Procedure The global data relationships in a program can be exposed and codified by the static analysis methods described in this paper. A procedure is given which determines all the definitions which can possibly "reach" each node of the control flow graph of the program and all the definitions that are "live" on each edge of the graph. The procedure uses an "interval" ordered edge listing data structure and handles reducible and irreducible graphs indistinguishably. CACM March, 1976 Allen, J. E. Cocke, J. program optimization, data flow analysis, flow graphs, algorithms, compilers 4.12 5.24 CA760303 JB January 5, 1978 8:33 AM 2877 5 2877 2877 5 2877 2877 5 2877 3103 5 2877 1860 6 2877 2877 6 2877