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b17fb70d04
These code paths are surprisingly hot in the `large-workspace` benchmark; it would be handy to see some detailed timings and execution counts.
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.