# What are the types of peephole optimization?

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## What are the types of peephole optimization?

Common techniques applied in peephole optimization: Null sequences – Delete useless operations. Combine operations – Replace several operations with one equivalent. Algebraic laws – Use algebraic laws to simplify or reorder instructions.

## Which of the following is are the characteristics of peephole optimization?

A simple but effective technique for improving the target code is peephole optimization, a method for trying to improving the performance of the target program by examining a short sequence of target instructions (called thepeephole) and replacing these instructions by a shorter or faster sequence, whenever possible.

## How peephole optimization is used to eliminate unreachable code explain?

A simple but effective technique for locally improving the target code is peephole optimization, which is done by examining a sliding window of target instructions (called the peephole) and replacing instruction sequences within the peephole by a shorter or faster sequence, whenever possible.

## What are code optimization techniques?

Code Optimization Techniques-

• Compile Time Evaluation.
• Common sub-expression elimination.
• Code Movement.
• Strength Reduction.

## What is benefit of peephole optimization?

The objective of peephole optimization is: To improve performance. To reduce memory footprint. To reduce code size.

## What are the techniques used for loop optimization?

For loop optimization the following three techniques are important:

• Code motion.
• Induction-variable elimination.
• Strength reduction.

## What is code optimization with example?

In this technique, As the name suggests, it involves eliminating the dead code. The statements of the code which either never executes or are unreachable or their output is never used are eliminated….Example-

Code Before Optimization Code After Optimization
i = 0 ; if (i == 1) { a = x + 5 ; } i = 0 ;

## What are loop optimization techniques?

Loop Optimization is the process of increasing execution speed and reducing the overheads associated with loops. It plays an important role in improving cache performance and making effective use of parallel processing capabilities. Most execution time of a scientific program is spent on loops.

## How many types of optimization can be divided?

29) In how many types of optimization can be divided? Explanation: The code optimization technique is divided into machine-dependent and machine-independent types.