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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.) |
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