6fd4a76d3b
refactor: cleaner check to return None It's very nit change. Refactor to shorten verbose check when returning None for `backend_feature_name`.
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.