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Jonathan Brouwer
8ffe107470
Store a PathBuf rather than SerializedModule for cached modules In cg_gcc `ModuleBuffer` already only contains a path anyway. And for moving LTO into `-Zlink-only` we will need to serialize `MaybeLtoModules`. By storing a path cached modules we avoid writing them to the disk a second time during serialization of `MaybeLtoModules`. Some further improvements will require changes to cg_gcc that I would prefer landing in the cg_gcc repo to actually test the LTO changes in CI. Part of https://github.com/rust-lang/compiler-team/issues/908
The codegen crate contains the code to convert from MIR into LLVM IR,
and then from LLVM IR into machine code. In general it contains code
that runs towards the end of the compilation process.
For more information about how codegen works, see the rustc dev guide.