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Stop using LLVM struct types for byval/sret
For `byval` and `sret`, the type has no semantic meaning, only the size matters\*†. Using `[N x i8]` is a more direct way to specify that we want `N` bytes, and avoids relying on LLVM's struct layout.
\*: The alignment would matter, if we didn't explicitly specify it. From what I can tell, we always specified the alignment for `sret`; for `byval`, we didn't until #112157.
†: For `byval`, the hidden copy may be impacted by padding in the LLVM struct type, i.e. padding bytes may not be copied. (I'm not sure if this is done today, but I think it would be legal.) But we manually pad our LLVM struct types specifically to avoid there ever being LLVM-visible padding, so that shouldn't be an issue.
Split out from #121577.
r? `@nikic`
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Detect unused struct impls pub trait
Fixes #47851
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Diagnostic renaming 3
A sequel to https://github.com/rust-lang/rust/pull/121780.
r? `@davidtwco`
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For increased consistency.
- session_diagnostic_derive -> diagnostic_derive
- session_subdiagnostic_derive -> subdiagnostic_derive
- SubdiagnosticDeriveBuilder -> SubdiagnosticDerive
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To match `derive(LintDiagnostic)`.
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To match `derive(Subdiagnostic)`.
Also rename `add_to_diagnostic{,_with}` as `add_to_diag{,_with}`.
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Rollup of 9 pull requests
Successful merges:
- #122275 (disable OOM test in Miri)
- #122276 (io::Read trait: make it more clear when we are adressing implementations vs callers)
- #122277 (BorrowedCursor docs clarification)
- #122286 (use Instance::expect_resolve() instead of unwraping Instance::resolve())
- #122290 (MIR printing: print the path of uneval'd const)
- #122293 (diagnostics: Do not suggest using `#[unix_sigpipe]` without a value)
- #122297 (bootstrap: document what the triples in 'Build' mean)
- #122302 (docs: Correct ptr/ref verbiage in SliceIndex docs.)
- #122304 (fix metadata for dyn-star in new solver)
r? `@ghost`
`@rustbot` modify labels: rollup
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To match `derive(Diagnostic)`.
Also rename `into_diagnostic` as `into_diag`.
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Also rename `into_diagnostic_arg` as `into_diag_arg`, and
`NotIntoDiagnosticArg` as `NotInotDiagArg`.
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It's the only diagnostic in the entire project that impls `Default`, and
the code is clearer without it.
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fix metadata for dyn-star in new solver
The pointee metadata of `dyn* Trait` types is `()` and not a vtable.
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docs: Correct ptr/ref verbiage in SliceIndex docs.
Fixes #122234
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bootstrap: document what the triples in 'Build' mean
Thanks to ``@onur-ozkan`` for pointing this out to me.
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diagnostics: Do not suggest using `#[unix_sigpipe]` without a value
Remove `Word` from the `unix_sigpipe` attribute template so that plain `#[unix_sigpipe]` is not included in suggestions of valid forms of the attribute. Also re-arrange diagnostics code slightly to avoid duplicate diagnostics.
Tracking issue is https://github.com/rust-lang/rust/issues/97889.
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MIR printing: print the path of uneval'd const
Currently it just prints `const _` which makes it impossible to say which constant is being referred to.
Also refer to promoteds in a consistent way; previously MIR printing would do
```
promoted[0] in C1: &Option<Cell<i32>> = {
// ...
}
```
Now that should be
```
const C1::promoted[0]: &Option<Cell<i32>> = {
// ...
}
```
We don't seem to have a test for that so I tried it by hand, it seems to work:
```
const main::promoted[12]: &[&str; 3] = {
let mut _0: &[&str; 3];
let mut _1: [&str; 3];
let mut _2: &str;
let mut _3: &str;
let mut _4: &str;
let mut _5: &str;
bb0: {
_3 = const "b";
_2 = &(*_3);
_5 = const "c";
_4 = &(*_5);
_1 = [const "a", move _2, move _4];
_0 = &_1;
return;
}
}
```
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use Instance::expect_resolve() instead of unwraping Instance::resolve()
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BorrowedCursor docs clarification
If one reads the `BorrowedCursor` docs without having seen `BorrowedBuf` before, it is quite easy to assume that "unfilled" and "uninit" are synonyms.
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io::Read trait: make it more clear when we are adressing implementations vs callers
Inspired by [this](https://github.com/rust-lang/rust/issues/72186#issuecomment-1987076295) comment.
For some reason we only have that `buf` warning in `read` and `read_exact`, even though it affects a bunch of other functions of this trait as well. It doesn't seem worth copy-pasting the same text everywhere though so I did not change this.
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disable OOM test in Miri
Needed for https://github.com/rust-lang/miri-test-libstd
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Update backtrace submodule to 0.3.70
r? `@ghost`
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Fixes #122234
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Detect typos for compiletest test directives
Checks directives against a known list of compiletest directives collected during migration from legacy-style compiletest directives. A suggestion for the best matching known directive will be made if an invalid directive is found.
This PR does not attempt to implement checks for Makefile directives because they still have the problem of regular comments and directives sharing the same comment prefix `#`.
Closes #83551.
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Subtree update of `rust-analyzer`
r? ghost
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Remove `Word` from the `unix_sigpipe` attribute template so that plain
`#[unix_sigpipe]` is not included in suggestions of valid forms of the
attribute. Also re-arrange diagnostics code slightly to avoid duplicate
diagnostics.
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consistent way
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- Fix invalid directive in `normalize-hidden-types`
- Update legacy directive in `two-phase-reservation-sharing-interference`
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Rollup of 14 pull requests
Successful merges:
- #112136 (Add std::ffi::c_str module)
- #113525 (Dynamically size sigaltstk in std)
- #121567 (Avoid some interning in bootstrap)
- #121642 (Update a test to support Symbol Mangling V0)
- #121685 (Fixing shellcheck comments on lvi test script)
- #121860 (Add a tidy check that checks whether the fluent slugs only appear once)
- #121942 (std::rand: enable getrandom for dragonflybsd too.)
- #122125 (Revert back to Git-for-Windows for MinGW CI builds)
- #122221 (match lowering: define a convenient struct)
- #122244 (fix: LocalWaker memory leak and some stability attributes)
- #122251 (Add test to check unused_lifetimes don't duplicate "parameter is never used" error)
- #122264 (add myself to rotation)
- #122269 (doc/rustc: Move loongarch64-unknown-linux-musl to Tier 3)
- #122271 (Fix legacy numeric constant diag items)
r? `@ghost`
`@rustbot` modify labels: rollup
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Fix legacy numeric constant diag items
- missed syms for usize/isize
- missed diag items on unsigned integers
For rust-lang/rust-clippy#12312
r? ```@Nilstrieb```
Follow-up to #121272, #121361, #121667
This should be the last one 🤞 Sorry!
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doc/rustc: Move loongarch64-unknown-linux-musl to Tier 3
Fixes #122266
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add myself to rotation
Won't have too much capacity, but I am able to contribute something. Will be rotating reviews if I run out of capacity :)
r? `````@ghost`````
`````@bors````` r+ rollup
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Add test to check unused_lifetimes don't duplicate "parameter is never used" error
Closes #72587.
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fix: LocalWaker memory leak and some stability attributes
fixes #122180.
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match lowering: define a convenient struct
Small refactor PR: `bindings` and `ascriptions` always come together so I made a struct for them. I'll have one or two fields to add to it in a later PR as well.
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Revert back to Git-for-Windows for MinGW CI builds
Following discussion in https://github.com/rust-lang/rust/pull/121182 it was decided to revert using MSYS2 Git for mingw builds.
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std::rand: enable getrandom for dragonflybsd too.
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Add a tidy check that checks whether the fluent slugs only appear once
As ``````@Nilstrieb`````` said in https://github.com/rust-lang/rust/pull/121828#issuecomment-1972622855:
> Might make sense to have a tidy check that checks whether the fluent slugs only appear once in the source code and lint for that
there's a tidy check already for sorting
We can get the tidy check error:
```
tidy check
tidy error: /path/to/rust/compiler/rustc_const_eval/messages.ftl: message `const_eval_invalid_align` is not used
tidy error: /path/to/rust/compiler/rustc_lint/messages.ftl: message `lint_trivial_untranslatable_diag` is not used
tidy error: /path/to/rust/compiler/rustc_parse/messages.ftl: message `parse_invalid_literal_suffix` is not used
tidy error: /path/to/rust/compiler/rustc_infer/messages.ftl: message `infer_need_type_info_in_coroutine` is not used
tidy error: /path/to/rust/compiler/rustc_passes/messages.ftl: message `passes_expr_not_allowed_in_context` is not used
tidy error: /path/to/rust/compiler/rustc_passes/messages.ftl: message `passes_layout` is not used
tidy error: /path/to/rust/compiler/rustc_parse/messages.ftl: message `parse_not_supported` is not used
```
r? ``````@Nilstrieb``````
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r=Mark-Simulacrum
Fixing shellcheck comments on lvi test script
Running `shellcheck` on `tests/run-make/x86_64-fortanix-unknown-sgx-lvi/script.sh` gives plenty of warnings. This PR fixes those issues. For completeness: #121683 fixes another warning as well
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Update a test to support Symbol Mangling V0
Note that since this is a symbol from `std`, overriding the symbol mangling version via the `compile-flags` directive does not work.
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Avoid some interning in bootstrap
This interning is pointless and only makes the code more complex.
The only remaining use of interning is `TargetSelection`, for which I left a comment.
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Dynamically size sigaltstk in std
On modern Linux with Intel AMX and 1KiB matrices,
Arm SVE with potentially 2KiB vectors,
and RISCV Vectors with up to 16KiB vectors,
we must handle dynamic signal stack sizes.
We can do so unconditionally by using getauxval,
but assuming it may return 0 as an answer,
thus falling back to the old constant if needed.
Fixes https://github.com/rust-lang/rust/issues/107795
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