Enable `f16` tests on x86 and x86-64
Since the `compiler_builtins` update [1], ABI bugs on x86 should be resolved. Enable tests for f16 on these platforms now.
`f16` math functions (`reliable_f16_math`) are still excluded because there is an LLVM crash for powi [2].
[1]: https://github.com/rust-lang/rust/pull/125016
[2]: https://github.com/llvm/llvm-project/issues/105747
try-job: dist-i586-gnu-i586-i686-musl
try-job: x86_64-apple-1
- `new_zeroed` variants move to `new_zeroed_alloc`
- the `write` fn moves to `box_uninit_write`
The remainder will be stabilized in upcoming patches, as
it was decided to only stabilize `uninit*` and `assume_init`.
Documents that `BikeshedIntrinsicFrom` models transmute-via-union,
which is slightly more expressive than the transmute-via-cast
implemented by `transmute_copy`. Additionally, we provide an
implementation of transmute-via-union as a method on the
`BikeshedIntrinsicFrom` trait with additional documentation on
the boundary between trait invariants and caller obligations.
Whether or not transmute-via-union is the right kind of transmute
to model remains up for discussion [1]. Regardless, it seems wise
to document the present behavior.
[1] https://rust-lang.zulipchat.com/#narrow/stream/216762-project-safe-transmute/topic/What.20'kind'.20of.20transmute.20to.20model.3F/near/426331967
This change allows setting either `build.cargo` or `build.rustc` without requiring
both to be set simultaneously, which was not possible previously.
To try it, set `build.rustc` without setting `build.cargo`, and try to bootstrap on clean build.
Signed-off-by: onur-ozkan <work@onurozkan.dev>
Rollup of 9 pull requests
Successful merges:
- #128511 (Document WebAssembly target feature expectations)
- #129243 (do not build `cargo-miri` by default on stable channel)
- #129263 (Add a missing compatibility note in the 1.80.0 release notes)
- #129276 (Stabilize feature `char_indices_offset`)
- #129350 (adapt integer comparison tests for LLVM 20 IR changes)
- #129408 (Fix handling of macro arguments within the `dropping_copy_types` lint)
- #129426 (rustdoc-search: use tighter json for names and parents)
- #129437 (Fix typo in a help diagnostic)
- #129457 (kobzol vacation)
r? `@ghost`
`@rustbot` modify labels: rollup
Fix handling of macro arguments within the `dropping_copy_types` lint
This PR fixes the handling of spans with different context (aka macro arguments) than the primary expression within the different `{drop,forget}ing_copy_types` and `{drop,forget}ing_references` lints.
<details>
<summary>Before</summary>
```
warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
--> drop_writeln.rs:5:5
|
5 | drop(writeln!(&mut msg, "test"));
| ^^^^^--------------------------^
| |
| argument has type `Result<(), std::fmt::Error>`
|
= note: `#[warn(dropping_copy_types)]` on by default
help: use `let _ = ...` to ignore the expression or result
--> /home/[..]/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/macros/mod.rs:688:9
|
68| let _ =
| ~~~~~~~
```
</details>
<details>
<summary>With this PR</summary>
```
warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
--> drop_writeln.rs:5:5
|
5 | drop(writeln!(&mut msg, "test"));
| ^^^^^--------------------------^
| |
| argument has type `Result<(), std::fmt::Error>`
|
= note: `#[warn(dropping_copy_types)]` on by default
help: use `let _ = ...` to ignore the expression or result
|
5 - drop(writeln!(&mut msg, "test"));
5 + let _ = writeln!(&mut msg, "test");
|
```
</details>
``````@rustbot`````` label +L-dropping_copy_types
Stabilize feature `char_indices_offset`
Stabilized API:
```rust
impl CharIndices<'_> {
pub fn offset(&self) -> usize;
}
```
Tracking issue: https://github.com/rust-lang/rust/issues/83871
Closes https://github.com/rust-lang/rust/issues/83871
I also attempted to improved the documentation to make it more clear that it returns the offset of the character that will be returned by the next call to `next()`.
Document WebAssembly target feature expectations
This commit is a result of the discussion on #128475 and incorporates parts of #109807 as well. This is all done as a new page of documentation for the `wasm32-unknown-unknown` target which previously did not exist. This new page goes into details about the preexisting target and additionally documents the expectations for WebAssembly features and code generation.
The tl;dr is that LLVM will enable features over time after most engines have had support for awhile. Compiling without features requires `-Ctarget-cpu=mvp` to rustc plus `-Zbuild-std` to Cargo.
Closes#109807Closes#119811Closes#128475
Rollup of 8 pull requests
Successful merges:
- #127623 (fix: fs::remove_dir_all: treat internal ENOENT as success)
- #128876 (Ship MinGW-w64 runtime DLLs along with `rust-lld.exe` for `-pc-windows-gnu` targets)
- #129055 (Migrate `x86_64-fortanix-unknown-sgx-lvi` `run-make` test to rmake)
- #129386 (Use a LocalDefId in ResolvedArg.)
- #129400 (Update `compiler_builtins` to `0.1.120`)
- #129414 (Fix extern crates not being hidden with `doc(hidden)`)
- #129417 (Don't trigger refinement lint if predicates reference errors)
- #129433 (Fix a missing import in a doc in run-make-support)
r? `@ghost`
`@rustbot` modify labels: rollup
