8c79e8d756
Inline functions called from `add_coverage` This removes quite a bit of indirection and duplicated code related to getting the `FunctionCoverage`. CC `@Zalathar`
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.