关键词: 基于剖视的优化, 值剖视, GCC编译器

Abstract:

This paper describes how to collect and use the invariant information of a variable in GCC. The optimization performance is evaluated using NPB benchmark. It proves that compiler optimizes and improves program performance based on the value profiles, but the effects of value profiling based optimizations are quite different between different programs. It shows that there are further improvements, such as value profiling information or optimization type, etc.

Key words: profile-based optimization, value-profile, GNU Compiler Collection(GCC)