DU-chains(Definition-Use) in compiler design
2018
DU-chains(Definition-Use) in compiler design
- A.
consist of a definition of a variable and all its uses, reachable from that definition
- B.
are created using a form of static code analysis
- C.
are prerequisite for many compiler optimization including constant propagation and common sub-expression elimination
- D.
All of the above
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Correct answer: D
DU-chains (Definition-Use chains) represent the relationship between where a variable is defined and where it is subsequently used.
They are constructed using static code analysis to identify all reachable uses from a definition without executing the program.
These chains are critical for enabling compiler optimizations such as constant propagation and common sub-expression elimination.
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