Question

Explain characteristics of peephole optimization.

Answer 1

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.

Answer 2

Answer:

Peephole optimization is a type of code optimization in which a small portion of the code is optimized. It is applied to a very small set of instructions in a code segment.

Explanation:

Peephole optimization:

Peephole or window refers to a small set of instructions or a small section of code on which peephole optimization is performed.

• It is based on the replacement theory, which states that a portion of code can be replaced with shorter and faster code without affecting the output. Machine-dependent optimization is the peephole.
• Peephole optimization is a simple but effective technique for improving target code locally. It involves examining a sliding window of target instructions (referred to as the peephole) and replacing instruction sequences within the peephole with a shorter or faster sequence whenever possible.

Peephole Optimization Characteristics :

Peephole optimization can also be used to improve the intermediate representation after intermediate code generation. Using the following characteristic, the peephole optimization can be applied to the target code.

• Getting Rid of Duplicate Loads and Stores.
• Getting Rid of Unreachable Code.
• The flow of control optimization Unreachable code.
• Elimination of redundant instructions.
• Flow-of-Control Improvements.
• Algebraic Simplification and Strength Reduction.
• Idioms for Machines.