Part 2: How rustc works
This part of the guide describes how the compiler works. It goes through everything from high-level structure of the compiler to how each stage of compilation works.
This section should be friendly to both readers interested in the end-to-end process of compilation and readers interested in learning about a specific system they wish to contribute to. If anything is unclear, feel free to file an issue on the rustc-guide repo or contact the compiler team, as detailed in this chapter from Part 1.