Question

Define the following:

⋅ Code motion

⋅ Loop unrolling

⋅ Dead code elimination

Answer 1

Code motion, loop unrolling, and dead code elimination are optimization techniques used to improve the performance and efficiency of computer programs.

Step-by-step explanation:

Code motion: Code motion refers to the optimization technique that involves moving a block of code to a different location in the program. It is used to improve the performance and efficiency of the code by reducing redundant operations. For example, moving a frequently used calculation outside of a loop can save computation time.

Loop unrolling: Loop unrolling is an optimization technique used to improve the performance of loops. It involves expanding the loop body by duplicating its contents, reducing the number of loop iterations. This can eliminate loop overhead and improve instruction-level parallelism.

Dead code elimination: Dead code elimination is an optimization technique used to remove code that is never executed. This can be achieved by analyzing the control flow of the program and identifying code that is unreachable or has no effect on the program's output. Removing dead code can reduce the size of the program and improve its performance.