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The first PR for https://github.com/rust-lang/compiler-team/issues/606
This is just the move-and-rename, because it's plenty big-and-bitrotty already. Future PRs will start using `FieldIdx` more broadly, and concomitantly removing `FieldIdx::new`s.
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It has a single callsite.
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It factors out a repeated code pattern.
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It helped to reuse `update_def` for the crate root, but it created confusion and caused some mistakes when I implemented #109500
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Rollup of 8 pull requests
Successful merges:
- #91793 (socket ancillary data implementation for FreeBSD (from 13 and above).)
- #92284 (Change advance(_back)_by to return the remainder instead of the number of processed elements)
- #102472 (stop special-casing `'static` in evaluation)
- #108480 (Use Rayon's TLV directly)
- #109321 (Erase impl regions when checking for impossible to eagerly monomorphize items)
- #109470 (Correctly substitute GAT's type used in `normalize_param_env` in `check_type_bounds`)
- #109562 (Update ar_archive_writer to 0.1.3)
- #109629 (remove obsolete `givens` from regionck)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Move tests and limit the init mask's structures/fields visibility.
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Use Rayon's TLV directly
This accesses Rayon's `TLV` thread local directly avoiding wrapper functions. This makes rustc work with https://github.com/rust-lang/rustc-rayon/pull/10.
r? `@cuviper`
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Avoid materializing bits in the InitMask bitset when a single value
would be enough: when the mask represents a fully initialized or fully
uninitialized const allocation.
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Refactor: `VariantIdx::from_u32(0)` -> `FIRST_VARIANT`
Since structs are always `VariantIdx(0)`, there's a bunch of files where the only reason they had `VariantIdx` or `vec::Idx` imported at all was to get the first variant.
So this uses a constant for that, and adds some doc-comments to `VariantIdx` while I'm there, since [it doesn't have any today](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_target/abi/struct.VariantIdx.html).
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Since structs are always `VariantIdx(0)`, there's a bunch of files where the only reason they had `VariantIdx` or `vec::Idx` imported at all was to get the first variant.
So this uses a constant for that, and adds some doc-comments to `VariantIdx` while I'm there, since it doesn't have any today.
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Rollup of 9 pull requests
Successful merges:
- #108629 (rustdoc: add support for type filters in arguments and generics)
- #108924 (panic_immediate_abort requires abort as a panic strategy)
- #108961 (Refine error spans for const args in hir typeck)
- #108986 (sync LVI tests)
- #109142 (Add block-based mutex unlocking example)
- #109368 (fix typo in the creation of OpenOption for RustyHermit)
- #109493 (Return nested obligations from canonical response var unification)
- #109515 (Add AixLinker to support linking on AIX)
- #109536 (resolve: Rename some cstore methods to match queries and add comments)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Refine error spans for const args in hir typeck
Improve just a couple of error messages having to do with mismatched consts.
r? `@ghost` i'll put this up when the dependent commits are merged
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Don't pass `TreatProjections` separately to `fast_reject`
Don't pass `TreatProjections` separately to `fast_reject`, and instead use the original approach of switching on two variants of `TreatParams` (undoes this: https://github.com/rust-lang/rust/pull/108830#pullrequestreview-1330371417).
Fixes the regression introduced in https://github.com/rust-lang/rust/pull/108830#issuecomment-1468116419
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Add `CastKind::Transmute` to MIR
~~Nothing actually produces it in this commit, so I don't know how to test it, but it also means it shouldn't be possible for it to break anything.~~
Includes lowering `transmute` calls to it, so it's used.
Zulip Conversation: <https://rust-lang.zulipchat.com/#narrow/stream/189540-t-compiler.2Fwg-mir-opt/topic/Good.20first.20isssue/near/321849610>
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rustc_interface: Add a new query `pre_configure`
It partially expands crate attributes before the main expansion pass (without modifying the crate), and the produced preliminary crate attribute list is used for querying a few attributes that are required very early.
Crate-level cfg attributes on the crate itself are then expanded normally during the main expansion pass, like attributes on any other nodes.
This is a continuation of https://github.com/rust-lang/rust/pull/92473 and one more step to very unstable crate-level proc macro attributes maybe actually working.
Previously crate attributes were pre-configured simultaneously with feature extraction, and then written directly into `ast::Crate`.
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Rollup of 7 pull requests
Successful merges:
- #108541 (Suppress `opaque_hidden_inferred_bound` for nested RPITs)
- #109137 (resolve: Querify most cstore access methods (subset 2))
- #109380 (add `known-bug` test for unsoundness issue)
- #109462 (Make alias-eq have a relation direction (and rename it to alias-relate))
- #109475 (Simpler checked shifts in MIR building)
- #109504 (Stabilize `arc_into_inner` and `rc_into_inner`.)
- #109506 (make param bound vars visibly bound vars with -Zverbose)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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It partially expands crate attributes before the main expansion pass (without modifying the crate), and the produced preliminary crate attribute list is used for querying a few attributes that are required very early.
Crate-level cfg attributes are then expanded normally during the main expansion pass, like attributes on any other nodes.
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r=compiler-errors
make param bound vars visibly bound vars with -Zverbose
I was trying to debug some type/const bound var stuff and it was shockingly tricky due to the fact that even with `-Zverbose` enabled the `T` in `for<T> T: Trait` prints as `T` making it seem like its `TyKind::Param` when it is infact `TyKind::Bound`. This PR "fixes" this when `-Zverbose` is set to allow rendering it as `^T` or `^1_T` depending on binder depth.
r? ```@compiler-errors```
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Make alias-eq have a relation direction (and rename it to alias-relate)
Emitting an "alias-eq" is too strict in some situations, since we don't always want strict equality between a projection and rigid ty. Adds a relation direction.
* I could probably just reuse this [`RelationDir`](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_infer/infer/combine/enum.RelationDir.html) -- happy to uplift that struct into middle and use that instead, but I didn't feel compelled to... 🤷
* Some of the matching in `compute_alias_relate_goal` is a bit verbose -- I guess I could simplify it by using [`At::relate`](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_infer/infer/at/struct.At.html#method.relate) and mapping the relation-dir to a variance.
* Alternatively, I coulld simplify things by making more helper functions on `EvalCtxt` (e.g. `EvalCtxt::relate_with_direction(T, T)` that also does the nested goal registration). No preference.
r? ```@lcnr``` cc ```@BoxyUwU``` though boxy can claim it if she wants
NOTE: first commit is all the changes, the second is just renaming stuff
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Rollup of 9 pull requests
Successful merges:
- #108954 (rustdoc: handle generics better when matching notable traits)
- #109203 (refactor/feat: refactor identifier parsing a bit)
- #109213 (Eagerly intern and check CrateNum/StableCrateId collisions)
- #109358 (rustc: Remove unused `Session` argument from some attribute functions)
- #109359 (Update stdarch)
- #109378 (Remove Ty::is_region_ptr)
- #109423 (Use region-erased self type during IAT selection)
- #109447 (new solver cleanup + implement coherence)
- #109501 (make link clickable)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Updates `interpret`, `codegen_ssa`, and `codegen_cranelift` to consume the new cast instead of the intrinsic.
Includes `CastTransmute` for custom MIR building, to be able to test the extra UB.
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new solver cleanup + implement coherence
the cleanup:
- change `Certainty::unify_and` to consider ambig + overflow to be ambig
- rename `trait_candidate_should_be_dropped_in_favor_of` to `candidate_should_be_dropped_in_favor_of`
- remove outdated fixme
For coherence I mostly just add an ambiguous candidate if the current trait ref is unknowable. I am doing the same for reservation impl where I also just add an ambiguous candidate.
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Remove Ty::is_region_ptr
Fixes #109372
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rustc: Remove unused `Session` argument from some attribute functions
(One auxiliary test file containing one of these functions was unused, so I removed it instead of updating.)
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Rollup of 10 pull requests
Successful merges:
- #109373 (Set LLVM `LLVM_UNREACHABLE_OPTIMIZE` to `OFF`)
- #109392 (Custom MIR: Allow optional RET type annotation)
- #109394 (adapt tests/codegen/vec-shrink-panik for LLVM 17)
- #109412 (rustdoc: Add GUI test for "Auto-hide item contents for large items" setting)
- #109452 (Ignore the vendor directory for tidy tests.)
- #109457 (Remove comment about reusing rib allocations)
- #109461 (rustdoc: remove redundant `.content` prefix from span/a colors)
- #109477 (`HirId` to `LocalDefId` cleanup)
- #109489 (More general captures)
- #109494 (Do not feed param_env for RPITITs impl side)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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RPITITs are `DefKind::Opaque` with new lowering strategy
r? `@spastorino`
Kinda cherry-picked #109400
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Remove `VecMap`
Not sure what the use of this data structure is over just using `FxIndexMap` or a `Vec`.
r? ```@ghost```
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a general type system cleanup
removes the helper functions `traits::fully_solve_X` as they add more complexity then they are worth. It's confusing which of these helpers should be used in which context.
changes the way we deal with overflow to always add depth in `evaluate_predicates_recursively`. It may make sense to actually fully transition to not have `recursion_depth` on obligations but that's probably a bit too much for this PR.
also removes some other small - and imo unnecessary - helpers.
r? types
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Rollup of 8 pull requests
Successful merges:
- #96391 (Windows: make `Command` prefer non-verbatim paths)
- #108164 (Drop all messages in bounded channel when destroying the last receiver)
- #108729 (fix: modify the condition that `resolve_imports` stops)
- #109336 (Constrain const vars to error if const types are mismatched)
- #109403 (Avoid ICE of attempt to add with overflow in emitter)
- #109415 (Refactor `handle_missing_lit`.)
- #109441 (Only implement Fn* traits for extern "Rust" safe function pointers and items)
- #109446 (Do not suggest bounds restrictions for synthesized RPITITs)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Only implement Fn* traits for extern "Rust" safe function pointers and items
Since calling the function via an `Fn` trait will assume `extern "Rust"` ABI and not do any safety checks, only safe `extern "Rust"` function can implement the `Fn` traits. This syncs the logic between the old solver and the new solver.
r? `@compiler-errors`
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