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Those effects are untested and unused. Remove them along with
the implementation of `BasicBlocks::switch_sources`.
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With the removal of `cfg(parallel_compiler)`, these are always shared
references and `std::sync::OnceLock`.
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`Postorder` has a `C: Customization<'tcx>` parameter, that gives it
flexibility about how it computes successors. But in practice, there are
only two `impls` of `Customization`, and one is for the unit type.
This commit simplifies things by removing the generic parameter and
replacing it with an `Option`.
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This is much clearer than `Option<u128>`.
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We have four macros for generating trivial traversal (fold/visit) and
lift impls.
- `rustc_ir::TrivialTypeTraversalImpls`
- `rustc_middle::TrivialTypeTraversalImpls`
- `rustc_middle::TrivialLiftImpls`
- `rustc_middle::TrivialTypeTraversalAndLiftImpls`
The first two are very similar. The last one just combines the second
and third one.
The macros themselves are ok, but their use is a mess. This commit does
the following.
- Removes types that no longer need a lift and/or traversal impl from
the macro calls.
- Consolidates the macro calls into the smallest number of calls
possible, with each one mentioning as many types as possible.
- Orders the types within those macro calls alphabetically, and makes
the module qualification more consistent.
- Eliminates `rustc_middle::mir::type_foldable`, because the macro calls
were merged and the manual `TypeFoldable` impls are better placed in
`structural_impls.rs`, alongside all the other ones.
This makes the code more concise. Moving forward, it also makes it more
obvious where new types should be added.
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This is an alternative to `Engine::new_generic` for gen/kill analyses.
It's supposed to be an optimization, but it has negligible effect.
The commit merges `Engine::new_generic` into `Engine::new`.
This allows the removal of various other things: `GenKillSet`,
`gen_kill_statement_effects_in_block`, `is_cfg_cyclic`.
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I am surprised the diff is so small for this enormous crate.
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The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
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Now with RPITIT instead of GAT!
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Now with GAT!
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The only usage immediately throws out the data, so.
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All the same reasons as for `[T]`: more general, less pointer chasing, and `&mut IndexSlice` emphasizes that it doesn't change *length*.
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Instantiate dominators algorithm only once
Remove inline from BasicBlocks::dominators to instantiate the dominator algorithm only once - in the rustc_middle crate.
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Remove inline from BasicBlocks::dominators to instantiate the dominator
algorithm only once - in the rustc_middle crate.
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This PR will fix some typos detected by [typos].
I only picked the ones I was sure were spelling errors to fix, mostly in
the comments.
[typos]: https://github.com/crate-ci/typos
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This makes it possible to mutably borrow different fields of the MIR
body without resorting to methods like `basic_blocks_local_decls_mut_and_var_debug_info`.
To preserve validity of control flow graph caches in the presence of
modifications, a new struct `BasicBlocks` wraps together basic blocks
and control flow graph caches.
The `BasicBlocks` dereferences to `IndexVec<BasicBlock, BasicBlockData>`.
On the other hand a mutable access requires explicit `as_mut()` call.
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