3d95330230
Add support for artifact size profiling This adds support for profiling artifact file sizes (incremental compilation artifacts and query cache to begin with). Eventually we want to track this in perf.rlo so we can ensure that file sizes do not change dramatically on each pull request. This relies on support in measureme: https://github.com/rust-lang/measureme/pull/169. Once that lands we can update this PR to not point to a git dependency. This was worked on together with `@michaelwoerister.` r? `@wesleywiser`
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.