rust/compiler/rustc_middle
bors 49c0861ed0 Auto merge of #87234 - cjgillot:lower-mono, r=petrochenkov
Lower only one HIR owner at a time

Based on https://github.com/rust-lang/rust/pull/83723
Additional diff is here: https://github.com/cjgillot/rust/compare/ownernode...lower-mono

Lowering is very tangled and has a tendency to intertwine the transformation of different items. This PR aims at simplifying the logic by:
- moving global analyses to the resolver (item_generics_num_lifetimes, proc_macros, trait_impls);
- removing a few special cases (non-exported macros and use statements);
- restricting the amount of available information at any one time;
- avoiding back-and-forth between different owners: an item must now be lowered all at once, and its parent cannot refer to its nodes.

I also removed the sorting of bodies by span.  The diagnostic ordering changes marginally, since definitions are pretty much sorted already according to the AST. This uncovered a subtlety in thir-unsafeck.

(While these items could logically be in different PRs, the dependency between commits and the amount of conflicts force a monolithic PR.)
2021-09-21 07:52:15 +00:00
..
benches
src Auto merge of #87234 - cjgillot:lower-mono, r=petrochenkov 2021-09-21 07:52:15 +00:00
Cargo.toml Move the dataflow framework to its own crate. 2021-09-07 19:57:07 +02:00
README.md

For more information about how rustc works, see the rustc dev guide.