How Common Subexpression Elimination Works?
CSE operates on the principle of recognizing recurring subexpressions in code. A subexpression is a portion of code that computes a value and can be a part of multiple larger expressions. Instead of recomputing the same subexpression every time it appears in the code, CSE calculates it once and stores the result in a temporary variable. This variable is then used wherever the subexpression occurs in the code, effectively replacing the repetitive calculations with a single reference.
Common Sub Expression Elimination
Common subexpression elimination (CSE) is a technique used to optimize the codes. It works by computing the value of the subexpression and assigning the value to a variable. Now, the initial common subexpression is replaced by that variable. It helps in reducing the number of repeated computations. CSE focuses on identifying and eliminating redundant calculations within a program, leading to faster and more efficient code execution.