What is the primary goal of constant propagation in compiler optimization?
2025
What is the primary goal of constant propagation in compiler optimization?
- A.
To propagate constant values through program variables
- B.
To remove unused variables
- C.
To allocate memory for constants at runtime
- D.
To replace variables with their declared types
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Correct answer: A
Constant Propagation is a powerful compile-time optimization technique used in the middle-end of a compiler. Its main objective is to identify expressions that evaluate to a known constant value at compile time and substitute those constants throughout the execution path.