Control Dependencies
Control dependence is a situation in which a program’s instruction executes if the previous instruction evaluates in a way that allows its execution.
A statement S2 is control dependent on S1 (written ) if and only if S2's execution is conditionally guarded by S1. The following is an example of such a control dependence:
S1 if x > 2 goto L1 S2 y := 3 S3 L1: z := y + 1Here, S2 only runs if the predicate in S1 is false.
Read more about this topic: Dependence Analysis
Famous quotes containing the word control:
“The human mind is indeed a cave swarming with strange forms of life, most of them unconscious and unilluminated. Unless we can understand something as to how the motives that issue from this obscurity are generated, we can hardly hope to foresee or control them.”
—Charles Horton Cooley (1864–1929)