Rollup of 4 pull requests #71367
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Rollup of 4 pull requests #71367
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Co-Authored-By: Ralf Jung <post@ralfj.de>
* Add new error code E0752 * Add span to hir::IsAsync::Yes * Emit an error if main or the start function is marked as async * Add two regression tests Fix formatting errors and bless test outputs * move tests to ui/async-await fix test error text remove span from IsAsync
Co-Authored-By: Amanieu d'Antras <amanieu@gmail.com>
Stabilize most common subset of alloc_layout_extras Tracking issue: rust-lang#55724 Specifically, this stabilizes: ```rust pub fn Layout::align_to(&self, align: usize) -> Result<Layout, LayoutErr>; pub fn Layout::pad_to_align(&self) -> Layout; pub fn Layout::extend(&self, next: Layout) -> Result<(Layout, usize), LayoutErr>; pub fn Layout::array<T>(n: usize) -> Result<Layout, LayoutErr>; ``` Methods that are tracked by rust-lang#55724 but are not stabilized here: ```rust pub fn Layout::padding_needed_for(&self, align: usize) -> usize; pub fn Layout::repeat(&self, n: usize) -> Result<(Layout, usize), LayoutErr>; pub fn Layout::repeat_packed(&self, n: usize) -> Result<Layout, LayoutErr>; pub fn Layout::extend_packed(&self, next: Layout) -> Result<Layout, LayoutErr>; ``` Combined, these stabilized functions allow code to construct and manipulate `repr(C)` layouts while letting the standard library handle correctness in the face of edge cases. For example use cases, consider the usage in [hashbrown](https://github.com/Amanieu/hashbrown/blob/2f2af1d/src/raw/mod.rs#L143), [crossbeam-skiplist](https://github.com/crossbeam-rs/crossbeam-skiplist/blob/master/src/base.rs#L99), [pointer-utils/slice-dst](https://github.com/CAD97/pointer-utils/blob/92aeefeed9399f28d1b1654b63f8dcbe1242d8d4/crates/slice-dst/src/layout_polyfill.rs), and of course the standard library itself. Providing a higher-level API such as `Layout::repr_c<const N: usize>(fields: [Layout; N]) -> Result<(Layout, [usize; N]), LayoutErr>` is blocked on const generics, which are a ways off. Providing an API that doesn't provide offsets would be quite suboptimal, as the reason for calculating the layout like this rather than `Layout::new` is to get the field offsets. The primary issue with the current API is having to call `.pad_to_align()` to match the layout of a `repr(C)` struct. However, I think this is not just a (failing? limitation?) of the API, but rather intrinsic complexity. While all Rust-defined types have size==stride, and probably will for the foreseeable future, there is no inherent reason why this is a limitation of all allocations. As such, the `Layout` manipulation APIs shouldn't impose this limitation, and instead the higher level api of `repr_c` (or just plain old using `Layout::new`) can make keeping it simple. cc @matklad r? @rust-lang/libs
…rochenkov Check that main/start is not async * Add new error code E0752 * Add span to hir::IsAsync::Yes * Emit an error if main or the start function is marked as async * Add two regression tests This PR fixes rust-lang#68523.
…d_mir, r=ecstatic-morse MIR: use HirId instead of NodeId to avoid cycles while inlining I wanted to see if I could limit the number of uses of `NodeId` when `HirId` is available and I saw that some of the MIR `Inliner` code could use `Span` instead of `NodeId`, not unlike in rust-lang#71197. ~If I'm understanding the reason for not calling `optimized_mir` in incremental builds here correctly, this change could also allow us to do so.~ This change could affect performance, so if this approach makes sense, a perf run is probably a good idea.
…ulacrum Do not build tools if user do not want them Fixes rust-lang#71307
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@bors r+ p=4 rollup=never |
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📌 Commit 9a0e702 has been approved by |
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☀️ Test successful - checks-azure |
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