What is the goal of constant propagation optimization ?

Constant propagation is a compiler optimization technique designed to improve code efficiency by tracking the values of variables throughout execution. When a variable is assigned a constant value, such as x = 5, the compiler replaces all subsequent uses of that variable with the literal value 5. This process eliminates redundant expressions because operations involving known constants can often be simplified or computed at compile time rather than runtime. For instance, if an expression is 5 + 3, constant propagation replaces it with the pre-calculated result of 8. Option B is incorrect because eliminating function calls relates more to inlining or dead code elimination, not specifically constant propagation. Option C describes memory optimization techniques like register allocation or stack management, while Option D refers to control flow analysis for branch prediction. Therefore, the primary goal is replacing constants with their values to remove redundant computations.