> I’d like to see rustc get sccache integration that works at the MIR level too so that changing something that doesn’t change the code gen meaningfully still g

> I’d like to see rustc get sccache integration that works at the MIR level too so that changing something that doesn’t change the code gen meaningfully still gets a cached response (e.g. changing some comments/whitespace, moving functions around, etc). Isn't incremental compilation already like that?