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1. |
A variable x is said to be live at a statement Si in a program if the following three conditions hold simultaneously:i. There exists a statement Sj that uses xii. There is a path from Si to Sj in the flow graph corresponding to the programiii. The path has no intervening assignment to x including at Si and SjThe variables which are live both at the statement in basic block 2 and at the statement in basic block 3 of the above control flow graph are |
A. | p, s, u |
B. | r, s, u |
C. | r, u |
D. | q, v |
Answer» D. q, v | |