Bump `cfg-if` to `1.0` in rustc crates
When `packed_simd_2` and `getrandom` are updated to newer versions, we will no longer have a dependency on old `cfg_if` versions.
Fix an opaque type ICE
fixes#104551
The issue is that if you have
```rust
type T = impl Sized;
let (_a, _b): T = ..
```
we have only the type annotation `T`, but want to use that ascription for `_a` and `_b`, so what we generate is a type ascription plus a field projection saying `_a`'s type is `T::0`. Of course `T` has no fields. Of course we could also not generate type annotations for projections into opaque types at all, but that's more fragile, as we now have to make sure that 12bbdbdb44/compiler/rustc_mir_build/src/build/matches/mod.rs (L709) doesn't have any arm that introduces a user type annotation except for `PatKind::Binding`.
docs: add long error explanation for error E0472
Add long-form error docs for E0472: "inline assembly not supported on this target" and update UI tests.
R? `@GuillaumeGomez`
It's not used anywhere in CI, and it seems of questionable use.
It was first added in 0e272de69f, which looks like it's just intended for CI, not as a user-facing feature.
Implement va_list and va_arg for s390x FFI
Following the s390x ELF ABI and based on the clang implementation, provide appropriate definitions of va_list in library/core/src/ffi/mod.rs and va_arg handling in compiler/rustc_codegen_llvm/src/va_arg.rs.
Fixes the following test cases on s390x:
src/test/run-make-fulldeps/c-link-to-rust-va-list-fn src/test/ui/abi/variadic-ffi.rs
Fixes https://github.com/rust-lang/rust/issues/84628.
Remove old versions of `cfg-if` by bumping `packed_simd_2` and `getrandom v0.2` versions
```console
> cargo update --package packed_simd_2 --package getrandom@0.2.0
Updating crates.io index
Removing cfg-if v0.1.10
Updating getrandom v0.2.0 -> v0.2.8
Updating packed_simd_2 v0.3.4 -> v0.3.8
```
`packed_simd_2` is only used as a dependency `bytecount`. The bigger jump is `getrandom@0.2.0`, but it's still semver compatible and there doesn't seem to be any worrying changes (see the [changelog](https://github.com/rust-random/getrandom/blob/master/CHANGELOG.md)). Note that this doesn't affect `getrandom@0.1.16`, which is already using the latest version of `cfg-if` (besides, there are already plans to remove that entirely).
Rollup of 5 pull requests
Successful merges:
- #105901 (Don't panic on stable since miri is not available there)
- #105912 (rustdoc: force pre tags to have the default line height)
- #105914 (rustdoc: Simplify CSS for scraped code examples code blocks)
- #105933 (Add readable rustdoc display for tvOS and watchOS)
- #105935 (docs/test: add UI test and long-form error docs for `E0377`)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Improve syntax of `newtype_index`
This makes it more like proper Rust and also makes the implementation a lot simpler.
Mostly just turns weird flags in the body into proper attributes.
It should probably also be converted to an attribute macro instead of function-like, but that can be done in a future PR.
