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19211dfd0f
rustc_codegen_llvm: Feature Conversion Tidying The author thinks we can improve `to_llvm_features`, a function to convert a Rust target feature name into an LLVM feature (or nothing, to ignore features unsupported by LLVM) for better maintainability. 1. We can simplify some clauses and some expressions. 2. There are some readability issues. This PR attempts to resolve some of them by tidying many cases.
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.