Nov 22, 2024 · A Control Flow Graph (CFG) is the graphical representation of control flow or computation during the execution of programs or applications. Control flow graphs are mostly used in static analysis as well as compiler applications, as they can accurately represent the flow inside a program unit.

In computer science, control flow (or flow of control) is the order in which individual statements, instructions or function calls of an imperative program are executed or evaluated. The emphasis on explicit control flow distinguishes an imperative programming language from a declarative programming language.

A control-flow graph (CFG) of a program is a graph \(G = (V, E)\) where: \(V\) is the set of all (maximal) basic blocks in the program code, plus one special elements representing the end of a program.

A program control flow diagram shows the flow of control through a program as a graph. Each node in the graph represents a statement in the flow.

How to propagate available expression facts over control flow graph? How should we combine facts from predecessors? Din[L] ? Union or intersection? to the empty set. for each L: block. We know the available expressions dataflow analysis will terminate!

A node p in a CFG dominates a node q if every path from the entry node to q goes through p. We say that node p is a dominator of node q. 1 <d 2, 2 <d 3, ... IDOM(2) = 1, IDOM(3) = 2 ... Does a node strictly (or properly) dominate itself? Does a predecessor of a node B always dominate B? Suppose a node A dominates all of B’s predecessors.

Question 1: how does information flow between the program points before and after an instruction? Question 2: how does information flow between successor and predecessor basic blocks? Q1: what is the effect of instructions? Q2: what is the effect of control flow?

In software testing, a control flow diagram is a visual representation of the paths or sequences of steps that a program or system can take during its execution. It is a powerful tool used by testers to understand, analyze, and communicate the flow of control within a software system.

Learn about Control Flow Graphs (CFG) in Compiler Design. Discover their importance, structure, and applications in optimizing programs and analyzing code.

Jul 3, 2018 · A control flow graph (CFG) in computer science is a representation, using graph notation, of all paths that might be traversed through a program during its execution. Ref: https://en.wikipedia.org/wiki/Control_flow_graph