aadbf75283
Unused since commit f141acf0678139ac31375d02feebcc2be220715b
("Move finalize_session_directory call out of cg_llvm").
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.