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rename erase_regions to erase_and_anonymize_regions
I find it consistently confusing that `erase_regions` does more than replacing regions with `'erased`. it also makes some code look real goofy to be writing manual folders to erase regions with a comment saying "we cant use erase regions" :> or code that re-calls erase_regions on types with regions already erased just to anonymize all the bound regions.
r? lcnr
idk how i feel about the name being almost twice as long now
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`&Freeze` parameters are not only `readonly` within the function,
but any captures of the pointer can also only be used for reads.
This can now be encoded using the `captures(address, read_provenance)`
attribute.
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rename `TraitRef::from_method` to `from_assoc`
also add a note to `GenericArgs::truncate_to`
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also add a note to `GenericArgs::truncate_to`
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This restricts the uses of the unadjusted ABI to LLVM intrinsics. The
Rust ABI works fine for the thread-local shim as it always returns
pointers directly like the backend expects.
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Directly creating the ArgAttributes rather than adjusting one is a bit
clearer.
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Some `let chains` clean-up
Not sure if this kind of clean-up is welcoming because of size, but I decided to try out one
r? compiler
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r=compiler-errors
Limit defaultness query to impl of trait
I separated this out from https://github.com/rust-lang/rust/pull/144386.
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We lost the following comment during refactorings:
The current code for niche-filling relies on variant indices instead of actual discriminants, so enums with explicit discriminants (RFC 2363) would misbehave.
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Opaque type collection: Guard against endlessly recursing free alias types
See test description for technical details.
Fixes https://github.com/rust-lang/rust/issues/131994.
r? oli-obk (sry, your queue is large, so no rush & feel free to reassign)
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consider nested cases for duplicate RPITIT
Fixes rust-lang/rust#143560
r? `@compiler-errors`
cc `@Zoxc`
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Allow custom default address spaces and parse `p-` specifications in the datalayout string
Some targets, such as CHERI, use as default an address space different from the "normal" default address space `0` (in the case of CHERI, [200 is used](https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-877.pdf)). Currently, `rustc` does not allow to specify custom address spaces and does not take into consideration [`p-` specifications in the datalayout string](https://llvm.org/docs/LangRef.html#langref-datalayout).
This patch tries to mitigate these problems by allowing targets to define a custom default address space (while keeping the default value to address space `0`) and adding the code to parse the `p-` specifications in `rustc_abi`. The main changes are that `TargetDataLayout` now uses functions to refer to pointer-related informations, instead of having specific fields for the size and alignment of pointers in the default address space; furthermore, the two `pointer_size` and `pointer_align` fields in `TargetDataLayout` are replaced with an `FxHashMap` that holds info for all the possible address spaces, as parsed by the `p-` specifications.
The potential performance drawbacks of not having ad-hoc fields for the default address space will be tested in this PR's CI run.
r? workingjubilee
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default data address space
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distinguish the duplicate item of rpitit
Fixes rust-lang/rust#140796
r? compiler
cc `@Zoxc`
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setup typos check in CI
This allows to check typos in CI, currently for compiler only (to reduce commit size with fixes). With current setup, exclude list is quite short, so it worth trying?
Also includes commits with actual typo fixes.
MCP: https://github.com/rust-lang/compiler-team/issues/817
typos check currently turned for:
* ./compiler
* ./library
* ./src/bootstrap
* ./src/librustdoc
After merging, PRs which enables checks for other crates (tools) can be implemented too.
Found typos will **not break** other jobs immediately: (tests, building compiler for perf run). Job will be marked as red on completion in ~ 20 secs, so you will not forget to fix it whenever you want, before merging pr.
Check typos: `python x.py test tidy --extra-checks=spellcheck`
Apply typo fixes: `python x.py test tidy --extra-checks=spellcheck:fix` (in case if there only 1 suggestion of each typo)
Current fail in this pr is expected and shows how typo errors emitted. Commit with error will be removed after r+.
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Don't recompute `DisambiguatorState` for every RPITIT in trait definition
The `associated_type_for_impl_trait_in_trait` currently needs to rerun the `RPITVisitor` for every RPITIT to compute its disambiguator.
Instead of synthesizing all of the RPITITs def ids one at a time in different queries, just synthesize them inside of the `associated_types_for_impl_traits_in_associated_fn` query. There we can just share the same `DisambiguatorState` for all the RPITITs in one function signature.
r? ``````@Zoxc`````` or ``````@oli-obk`````` cc rust-lang/rust#140453
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It's like `Symbol` but for byte strings. The interner is now used for
both `Symbol` and `ByteSymbol`. E.g. if you intern `"dog"` and `b"dog"`
you'll get a `Symbol` and a `ByteSymbol` with the same index and the
characters will only be stored once.
The motivation for this is to eliminate the `Arc`s in `ast::LitKind`, to
make `ast::LitKind` impl `Copy`, and to avoid the need to arena-allocate
`ast::LitKind` in HIR. The latter change reduces peak memory by a
non-trivial amount on literal-heavy benchmarks such as `deep-vector` and
`tuple-stress`.
`Encoder`, `Decoder`, `SpanEncoder`, and `SpanDecoder` all get some
changes so that they can handle normal strings and byte strings.
This change does slow down compilation of programs that use
`include_bytes!` on large files, because the contents of those files are
now interned (hashed). This makes `include_bytes!` more similar to
`include_str!`, though `include_bytes!` contents still aren't escaped,
and hashing is still much cheaper than escaping.
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New const traits syntax
This PR only affects the AST and doesn't actually change anything semantically.
All occurrences of `~const` outside of libcore have been replaced by `[const]`. Within libcore we have to wait for rustfmt to be bumped in the bootstrap compiler. This will happen "automatically" (when rustfmt is run) during the bootstrap bump, as rustfmt converts `~const` into `[const]`. After this we can remove the `~const` support from the parser
Caveat discovered during impl: there is no legacy bare trait object recovery for `[const] Trait` as that snippet in type position goes down the slice /array parsing code and will error
r? ``@fee1-dead``
cc ``@nikomatsakis`` ``@traviscross`` ``@compiler-errors``
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Co-authored-by: Folkert de Vries <folkert@folkertdev.nl>
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apply clippy::or_fun_call
Applies https://rust-lang.github.io/rust-clippy/master/index.html?groups=nursery#or_fun_call to reduce needless allocs.
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