Constant Propagation Transformation: Difference between revisions

Constant propagation is an optimization technique used in compilers to improve execution efficiency by replacing variables with known constant values during compilation. If an expression consists entirely of constants or previously propagated values, it is evaluated at compile time and replaced with its computed result. This transformation reduces runtime computations, simplifies code, and enables further optimizations by minimizing unnecessary variable assignments. By eliminating redundant calculations, constant propagation enhances program performance while preserving its original behavior.

emmtrix Studio can implement constant propagation using #pragma directives or via the GUI. Constant propagation is a transformation that propagates all known variable values within the block it is applied to. If an expression consists of propagated values and of constants, it will itself be evaluated to and replaced with its constant value.