mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-08 21:31:32 +00:00

Avoid accessing the HIR in the happy path of `coherent_trait` Unfortunately the hir is still used in unsafety checks, and we do not have a way to avoid that. An impl's unsafety is not part of any query other than hir. So this PR does not affect perf, but could still be considered a cleanup
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.