SLAU132V October 2004 – February 2020
In this phase, the compiler is invoked with the --use_profile_info=file.prf option, which reads the specified PRF file generated in phase 1. In phase 2, optimization decisions are made using the data generated during phase 1. The profile feedback file is used to guide program optimization. The compiler optimizes frequently executed program paths more aggressively.
The compiler uses data in the profile feedback file to guide certain optimizations of frequently executed program paths.