Dead Code Elimination: An Effective Compiler Optimization Technique

Dead codes are looked upon as unwanted codes that have no effect the program’s output. These codes pose great disadvantage to professional web development programmers as they occupy more space in the memory, decrease the data locality and lead to unnecessary time and effort in maintaining a code.
One of the key solutions to eliminate dead code is a proper static code analysis. Dead code elimination technique is a compiler optimization technique and a form of static code analysis that block such codes at compilation stage. Usually, the programmers conduct a control flow analysis on the codes to find the suspect code, which is never executed during program compilation. A proper control flow analysis detects any dead codes and helps in removing them from the source code, thus solving any programming problems during the development of a website.
Since dead code elimination is a compiler optimization technique that removes unwanted codes, it poses various benefits during development of website :
It reduces program size:
Dead code elimination shrinks program size, which is very important for a web and software development.
Avoids executing irrelevant operations:
Due to unreachable codes, a program executes irrelevant operations, thus reducing the program’s running time. Dead code elimination avoids this and lets a program function smoothly.
Most sophisticated compilers have options to activate dead code elimination at varying levels. In a lower level, the compiler removes instructions that cannot be executed. At higher level, compilers remove unused variables. The higher level also determines functions or instructions that have no purpose and eliminates them.
Using dead code elimination techniques, programmers remove code that is never executed. This improves performance because the program’s larger fractions fit into single cache lines and the program takes up less memory. This helps to improve the efficiency of the program in the web sites development process.