This summer I participated in GSoC under the LLVM Compiler Infrastructure. The goal of the project was to improve the NewGVN pass so that it can replace GVN as the main value numbering pass in LLVM. Background Global Value Numbering (GVN) consists of assigning value numbers such that instructions with the same value number are equivalent. NewGVN was introduced in 2016 to replace GVN. We now highlight a few aspects in which NewGVN is better than GVN. A key advantage of NewGVN over GVN is that ...
