编译器优化技术综述

P. Schneck
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引用次数: 27

摘要

本调查描述了编译器的主要优化技术,并将它们分为三类:与机器相关、与体系结构相关和与体系结构无关。依赖于机器的优化往往是局部的,并且通过使用指令集的特定属性来减少程序所需的时间或空间,在生成的代码的短范围内执行。依赖于体系结构的优化是全局的,在生成代码时执行。这些优化考虑的是计算机的结构,而不是其详细的指令集。与体系结构无关的优化也是全局的,但基于对程序流程图和源程序语句之间的依赖关系的分析。本文还介绍了一个通用优化器的概念回顾,该优化器在源代码级别执行与体系结构无关的优化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A survey of compiler optimization techniques
This survey describes the major optimization techniques of compilers and groups them into three categories: machine dependent, architecture dependent, and architecture independent. Machine-dependent optimizations tend to be local and are performed upon short spans of generated code by using particular properties of an instruction set to reduce the time or space required by a program. Architecture-dependent optimizations are global and are performed while generating code. These optimizations consider the structure of a computer, but not its detailed instruction set. Architecture-independent optimizations are also global but are based on analysis of the program flow graph and the dependencies among statements of source program. The paper also presents a conceptual review of a universal optimizer that performs architecture-independent optimizations at source-code level.
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