Subtree sync for rustc_codegen_cranelift
This implements simd_masked_store and fixes two borked subtree syncs that forgot to sync back some changes to the rust repo.
r? `@ghost`
`@rustbot` label +A-codegen +A-cranelift +T-compiler
Exhaustiveness: Improve complexity on some wide matches
https://github.com/rust-lang/rust/issues/118437 revealed an exponential case in exhaustiveness checking. While [exponential cases are unavoidable](https://compilercrim.es/rust-np/), this one only showed up after my https://github.com/rust-lang/rust/pull/117611 rewrite of the algorithm. I remember anticipating a case like this and dismissing it as unrealistic, but here we are :').
The tricky match is as follows:
```rust
match command {
BaseCommand { field01: true, .. } => {}
BaseCommand { field02: true, .. } => {}
BaseCommand { field03: true, .. } => {}
BaseCommand { field04: true, .. } => {}
BaseCommand { field05: true, .. } => {}
BaseCommand { field06: true, .. } => {}
BaseCommand { field07: true, .. } => {}
BaseCommand { field08: true, .. } => {}
BaseCommand { field09: true, .. } => {}
BaseCommand { field10: true, .. } => {}
// ...20 more of the same
_ => {}
}
```
To fix this, this PR formalizes a concept of "relevancy" (naming is hard) that was already used to decide what patterns to report. Now we track it for every row, which in wide matches like the above can drastically cut on the number of cases we explore. After this fix, the above match is checked with linear-many cases instead of exponentially-many.
Fixes https://github.com/rust-lang/rust/issues/118437
r? `@cjgillot`
Remove metadata decoding DefPathHash cache
My expectation is that this cache is largely useless. Decoding a DefPathHash from metadata is essentially a pair of memory loads - there's no heavyweight processing involved. Caching it behind a HashMap just adds extra cost and incurs hashing overheads for the indices.
Based on https://github.com/rust-lang/rust/pull/119238.
Skip duplicate stable crate ID encoding into metadata
Instead, we store just the local crate hash as a bare u64. On decoding,
we recombine it with the crate's stable crate ID stored separately in
metadata. The end result is that we save ~8 bytes/DefIndex in metadata
size.
One key detail here is that we no longer distinguish in encoded metadata
between present and non-present DefPathHashes. It used to be highly
likely we could distinguish as we used DefPathHash::default(), an
all-zero representation. However in theory even that is fallible as
nothing strictly prevents the StableCrateId from being zero. In review it
was pointed out that we should never have a missing hash for a DefIndex anyway,
so this shouldn't matter.
fix minor mistake in comments describing VecDeque resizing
Avoiding confusion where one of the items in the deque seems to disappear in two of the three cases
improve container runner script
First commit fixes#118930
Second commit is mostly for development purposes. In read-only mode submodules cannot be initialized due to access limitations (see the log below), which means that tools cannot be built.
```sh
Updating submodule src/tools/cargo
error: could not lock config file .git/config: Read-only file system
error: could not lock config file .git/config: Read-only file system
fatal: Failed to register url for submodule path 'src/tools/cargo'
error: could not lock config file .git/config: Read-only file system
error: could not lock config file .git/config: Read-only file system
fatal: Failed to register url for submodule path 'src/tools/cargo'
Build completed unsuccessfully in 0:00:00
```
This cache is largely useless. Decoding a DefPathHash from metadata is
essentially a pair of memory loads - there's no heavyweight processing
involved. Caching it behind a HashMap just adds extra cost and incurs
hashing overheads.
Instead, we store just the local crate hash as a bare u64. On decoding,
we recombine it with the crate's stable crate ID stored separately in
metadata. The end result is that we save ~8 bytes/DefIndex in metadata
size.
One key detail here is that we no longer distinguish in encoded metadata
between present and non-present DefPathHashes. It used to be highly
likely we could distinguish as we used DefPathHash::default(), an
all-zero representation. However in theory even that is fallible as
nothing strictly prevents the StableCrateId from being zero.
Add illumos aarch64 target for rust.
This adds the newly being developed illumos aarch64 target to the rust compiler.
`@rmustacc` `@citrus-it` `@richlowe` As promissed before my hiatus :)
Rollup of 5 pull requests
Successful merges:
- #119231 (Clairify `ast::PatKind::Struct` presese of `..` by using an enum instead of a bool)
- #119232 (Fix doc typos)
- #119245 (Improve documentation for using warning blocks in documentation)
- #119248 (remove dead inferred outlives testing code)
- #119249 (Add spastorino to users_on_vacation)
r? `@ghost`
`@rustbot` modify labels: rollup
remove dead inferred outlives testing code
The `test_inferred_outlives` function was never run, because the code that's actually used for the tests was part of the `inferred_outlives_of` query, which ran before `test_inferred_outlives` during type collecting. This PR separates the test code from the query and moves it inside the dedicated function.
Clairify `ast::PatKind::Struct` presese of `..` by using an enum instead of a bool
The bool is mainly used for when a `..` is present, but it is also set on recovery to avoid errors. The doc comment not describes both of these cases.
See cee794ee98/compiler/rustc_parse/src/parser/pat.rs (L890-L897) for the only place this is constructed.
r? ``@compiler-errors``
Clean up `check_consts` and misc fixes
1. Remove most of the logic around erroring with trait methods. I have kept the part resolving it to a concrete impl, as that is used for const stability checks.
2. Turning on `effects` causes ICE with generic args, due to `~const Tr` when `Tr` is not `#[const_trait]` tripping up expectation in code that handles generic args, more specifically here:
8681e077b8/compiler/rustc_hir_analysis/src/astconv/generics.rs (L377)
We set `arg_count.correct` to `Err` to correctly signal that an error has already been reported.
3. UI test blesses.
Edit(fmease): Fixes#117244 (UI test is in #119099 for now).
r? compiler-errors
Add `IntoAsyncIterator`
This introduces the `IntoAsyncIterator` trait and uses it in the desugaring of the unstable `for await` loop syntax. This is mostly added for symmetry with `Iterator` and `IntoIterator`.
r? `@compiler-errors`
cc `@rust-lang/libs-api,` `@rust-lang/wg-async`
Split coroutine desugaring kind from source
What a coroutine is desugared from (gen/async gen/async) should be separate from where it comes (fn/block/closure).
