Discussion
A flow graph represents
Answer: D
Correct answer: basic blocks as nodes with edges showing possible control flow
The flow graph abstracts the program to its control structure: each node is a basic block, and an edge from one to another means control may pass between them.
Loops appear as cycles and conditionals as branching and rejoining paths. It is the structure on which global data flow analysis runs, since questions such as "which definitions reach this point" are answered by propagating facts along the edges until they settle.
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