Can compiler optimize the code?

Compilers are free to optimize code so long as they can guarantee the semantics of the code are not changed. I would suggestion starting at the Compiler optimization wikipedia page as there are many different kinds of optimization that are performed at many different stages.

What is code optimization with why we go how its affect compiler?

The code optimization in the synthesis phase is a program transformation technique, which tries to improve the intermediate code by making it consume fewer resources (i.e. CPU, Memory) so that faster-running machine code will result. The optimization process should not delay the overall compiling process.

What does the compiler need to consider when applying optimization?

The two most important characteristics are the speed and size of the code. Other characteristics include the amount of energy required to execute the code, the time it takes to compile the code and, in case the resulting code requires Just-in-Time (JIT) compilation, the time it takes to JIT compile the code.

How do you optimize code?

Optimize Program Algorithm For any code, you should always allocate some time to think the right algorithm to use. So, the first task is to select and improve the algorithm which will be frequently used in the code. 2. Avoid Type Conversion Whenever possible, plan to use the same type of variables for processing.

Which phase of compiler is code optimizer analysis?

Phase 2: Syntax Analysis. Phase 3: Semantic Analysis. Phase 4: Intermediate Code Generation. Phase 5: Code Optimization.

Why code optimization is called optional phase?

Code optimization is an optional phase. It is used to improve the intermediate code so that the output of the program could run faster and take less space. It removes the unnecessary lines of the code and arranges the sequence of statements in order to speed up the program execution.

What is compiler explain different phases of compiler?

Summary. Compiler operates in various phases each phase transforms the source program from one representation to another. Six phases of compiler design are 1) Lexical analysis 2) Syntax analysis 3) Semantic analysis 4) Intermediate code generator 5) Code optimizer 6) Code Generator.