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Rollup of 7 pull requests
Successful merges:
- #133266 (ci: fix explanation why LLVM download is disabled for windows-gnu)
- #136133 (Fix sentence in process::abort)
- #136279 (Rename `tcx.ensure()` to `tcx.ensure_ok()`, and improve the associated docs)
- #136328 (Rework "long type names" printing logic)
- #136358 (`#[optimize(none)]` implies `#[inline(never)]`)
- #136368 (Make comma separated lists of anything easier to make for errors)
- #136412 (Tweak fn pointer suggestion span)
r? `@ghost`
`@rustbot` modify labels: rollup
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Tweak fn pointer suggestion span
Use a more targeted span when suggesting casting an `fn` item to an `fn` pointer.
```
error[E0308]: cannot coerce functions which must be inlined to function pointers
--> $DIR/cast.rs:10:33
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LL | let _: fn(isize) -> usize = callee;
| ------------------ ^^^^^^ cannot coerce functions which must be inlined to function pointers
| |
| expected due to this
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= note: expected fn pointer `fn(_) -> _`
found fn item `fn(_) -> _ {callee}`
= note: fn items are distinct from fn pointers
help: consider casting to a fn pointer
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LL | let _: fn(isize) -> usize = callee as fn(isize) -> usize;
| +++++++++++++++++++++
```
```
error[E0308]: mismatched types
--> $DIR/fn-pointer-mismatch.rs:42:30
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LL | let d: &fn(u32) -> u32 = foo;
| --------------- ^^^ expected `&fn(u32) -> u32`, found fn item
| |
| expected due to this
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= note: expected reference `&fn(_) -> _`
found fn item `fn(_) -> _ {foo}`
help: consider using a reference
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LL | let d: &fn(u32) -> u32 = &foo;
| +
```
Previously we'd point at the whole expression for replacement, instead of marking what was being added.
We could also modify the suggestions for `&(name as fn())`, but for that we require storing more accurate spans than we have now.
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Make comma separated lists of anything easier to make for errors
Provide a new function `listify`, meant to be used in cases similar to `pluralize!`. When you have a slice of arbitrary elements that need to be presented to the user, `listify` allows you to turn that into a list of comma separated strings.
This reduces a lot of redundant logic that happens often in diagnostics.
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`#[optimize(none)]` implies `#[inline(never)]`
Fixes #136329
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Rework "long type names" printing logic
Make it so more type-system types can be printed in a shortened version (like `Predicate`s).
Centralize printing the information about the "full type name path".
Make the "long type path" for the file where long types are written part of `Diag`, so that it becomes easier to keep track of it, and ensure it will always will be printed out last in the diagnostic by making its addition to the output implicit.
Tweak the shortening of types in "expected/found" labels.
Remove dead file `note.rs`.
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Rename `tcx.ensure()` to `tcx.ensure_ok()`, and improve the associated docs
This is all based on my archaeology for https://rust-lang.zulipchat.com/#narrow/channel/182449-t-compiler.2Fhelp/topic/.60TyCtxtEnsure.60.
The main renamings are:
- `tcx.ensure()` → `tcx.ensure_ok()`
- `tcx.ensure_with_value()` → `tcx.ensure_done()`
- Query modifier `ensure_forwards_result_if_red` → `return_result_from_ensure_ok`
Hopefully these new names are a better fit for the *actual* function and purpose of these query call modes.
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Fix sentence in process::abort
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ci: fix explanation why LLVM download is disabled for windows-gnu
Continuation of https://github.com/rust-lang/rust/pull/132781
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ci: refactor how directories are removed in free-disk-space disk
try-job: aarch64-gnu
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Use a more targeted span when suggesting casting an `fn` item to an `fn` pointer.
```
error[E0308]: cannot coerce functions which must be inlined to function pointers
--> $DIR/cast.rs:10:33
|
LL | let _: fn(isize) -> usize = callee;
| ------------------ ^^^^^^ cannot coerce functions which must be inlined to function pointers
| |
| expected due to this
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= note: expected fn pointer `fn(_) -> _`
found fn item `fn(_) -> _ {callee}`
= note: fn items are distinct from fn pointers
help: consider casting to a fn pointer
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LL | let _: fn(isize) -> usize = callee as fn(isize) -> usize;
| +++++++++++++++++++++
```
```
error[E0308]: mismatched types
--> $DIR/fn-pointer-mismatch.rs:42:30
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LL | let d: &fn(u32) -> u32 = foo;
| --------------- ^^^ expected `&fn(u32) -> u32`, found fn item
| |
| expected due to this
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= note: expected reference `&fn(_) -> _`
found fn item `fn(_) -> _ {foo}`
help: consider using a reference
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LL | let d: &fn(u32) -> u32 = &foo;
| +
```
Previously we'd point at the whole expression for replacement, instead of marking what was being added.
We could also modify the suggestions for `&(name as fn())`, but for that we require storing more accurate spans than we have now.
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Rollup of 6 pull requests
Successful merges:
- #130514 (Implement MIR lowering for unsafe binders)
- #135684 (docs: Documented Send and Sync requirements for Mutex + MutexGuard)
- #136307 (Implement all mix/max functions in a (hopefully) more optimization amendable way)
- #136360 (Stabilize `once_wait`)
- #136364 (document that ptr cmp is unsigned)
- #136374 (Add link attribute for Enzyme's LLVMRust FFI)
r? `@ghost`
`@rustbot` modify labels: rollup
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Add link attribute for Enzyme's LLVMRust FFI
Since https://github.com/rust-lang/rust/pull/133429 landed, the compiler doesn't build with `-Zcross-crate-inline-threshold=always`. I don't expect anyone else to test or fix issues with that goofy configuration, so I'm fixing it.
This PR adds a link attribute just like https://github.com/rust-lang/rust/pull/118142 for all the new LLVMRust functions. They were actually added in https://github.com/rust-lang/rust/pull/130060 but weren't used until just now.
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document that ptr cmp is unsigned
Fixes #77497
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Stabilize `once_wait`
Closes: https://github.com/rust-lang/rust/issues/127527.
`@rustbot` label: +T-libs-api
r? libs-api
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Implement all mix/max functions in a (hopefully) more optimization amendable way
Previously the graph was like this:
```
min -> Ord::min -> min_by -> match on compare() (in these cases compare = Ord::cmp)
^
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min_by_key
```
now it looks like this:
```
min -> Ord::min -> `<=` <- min_by_key
min_by -> `Ordering::is_le` of `compare()`
```
(`max*` and `minmax*` are the exact same, i.e. they also use `<=` and `is_le`)
I'm not sure how to test this, but it should probably be easier for the backend to optimize.
r? `@scottmcm`
cc https://github.com/rust-lang/rust/issues/115939#issuecomment-2622161134
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docs: Documented Send and Sync requirements for Mutex + MutexGuard
This an attempt to continue where #123225 left off.
I did some light clean up from the work done in that PR.
I also documented the `!Send` + `Sync` implementations for `MutexGuard` to the best of my knowledge.
Let me know if I got anything wrong :smile:
fixes #122856
cc: ``@IoaNNUwU``
r? ``@joboet``
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Implement MIR lowering for unsafe binders
This is the final bit of the unsafe binders puzzle. It implements MIR, CTFE, and codegen for unsafe binders, and enforces that (for now) they are `Copy`. Later on, I'll introduce a new trait that relaxes this requirement to being "is `Copy` or `ManuallyDrop<T>`" which more closely models how we treat union fields.
Namely, wrapping unsafe binders is now `Rvalue::WrapUnsafeBinder`, which acts much like an `Rvalue::Aggregate`. Unwrapping unsafe binders are implemented as a MIR projection `ProjectionElem::UnwrapUnsafeBinder`, which acts much like `ProjectionElem::Field`.
Tracking:
- https://github.com/rust-lang/rust/issues/130516
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ci: use ubuntu 24 on free runners
try-job: aarch64-gnu
try-job: aarch64-gnu-debug
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Rollup of 7 pull requests
Successful merges:
- #135840 (omit unused args warnings for intrinsics without body)
- #135900 (Manually walk into WF obligations in `BestObligation` proof tree visitor)
- #136163 (Fix off-by-one error causing slice::sort to abort the program)
- #136266 (fix broken release notes id)
- #136314 (Use proper type when applying deref adjustment in const)
- #136348 (miri: make float min/max non-deterministic)
- #136351 (Add documentation for derive(CoercePointee))
r? `@ghost`
`@rustbot` modify labels: rollup
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tests: Port `symbol-mangling-hashed` to rmake.rs
Part of #121876.
This PR supersedes #128567 and is co-authored with `@lolbinarycat.`
### Summary
This PR ports `tests/run-make/symbol-mangling-hashed` to rmake.rs. Notable differences when compared to the Makefile version includes:
- It's no longer limited to linux + x86_64 only. In particular, this now is exercised on darwin and windows (esp. msvc) too.
- The test uses `object` crate to be more precise in the filtering, and avoids relying on parsing the human-readable `nm` output for *some* `nm` in the given environment (which isn't really a thing on msvc anyway, and `llvm-nm` doesn't handle msvc dylibs AFAICT).
- Dump the symbols satisfying various criteria on test failure to make it hopefully less of a pain to debug if it ever fails in CI.
### Review advice
- Best reviewed commit-by-commit.
- I'm not *super* sure about the msvc logic, would benefit from a MSVC (PE/COFF) expert taking a look.
---
try-job: x86_64-msvc-1
try-job: i686-msvc-1
try-job: i686-mingw
try-job: x86_64-mingw-1
try-job: x86_64-apple-1
try-job: aarch64-apple
try-job: test-various
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Add documentation for derive(CoercePointee)
Part of [RFC 3621][rfc] tracked by #123430. This text is heavily based on the guide-level explanation from the RFC.
``@rustbot`` label F-derive_coerce_pointee
[rfc]: https://rust-lang.github.io/rfcs/3621-derive-smart-pointer.html
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miri: make float min/max non-deterministic
This makes Miri match the documentation that landed in https://github.com/rust-lang/rust/pull/136296.
r? ``@oli-obk``
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Use proper type when applying deref adjustment in const
When applying a deref adjustment to some type `Wrap<T>` which derefs to `T`, we were checking that `T: ~const Deref`, not `Wrap<T>: ~const Deref` like we should have been.
r? project-const-traits
Fixes #136273
Fixes #135210 -- I just deleted the test since the regression test is uninteresting
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fix broken release notes id
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Fix off-by-one error causing slice::sort to abort the program
Fixes #136103.
Based on the analysis by ``@jonathan-gruber-jg`` and ``@orlp.``
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Manually walk into WF obligations in `BestObligation` proof tree visitor
When we encounter a `WellFormed` obligation in the `BestObligation` proof tree visitor, ignore the proof tree and call `wf::unnormalized_obligations` to derive well-formed obligations with the correct cause codes. This is to avoid having to replicate the somewhat delicate logic that `wf.rs` does to set up its obligation causes... Don't see a better way to do this.
vibes?? r? lcnr
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r=oli-obk
omit unused args warnings for intrinsics without body
potential fix for https://github.com/rust-lang/rust/issues/135598
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Make it so more type-system types can be printed in a shortened version (like `Predicate`s).
Centralize printing the information about the "full type name path".
Make the "long type path" for the file where long types are written part of `Diag`, so that it becomes easier to keep track of it, and ensure it will always will be printed out last in the diagnostic by making its addition to the output implicit.
Tweak the shortening of types in "expected/found" labels.
Remove dead file `note.rs`.
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Provide a new function `listify`, meant to be used in cases similar to `pluralize!`. When you have a slice of arbitrary elements that need to be presented to the user, `listify` allows you to turn that into a list of comma separated strings.
This reduces a lot of redundant logic that happens often in diagnostics.
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Rollup of 9 pull requests
Successful merges:
- #134531 ([rustdoc] Add `--extract-doctests` command-line flag)
- #135860 (Compiler: Finalize dyn compatibility renaming)
- #135992 (Improve documentation when adding a new target)
- #136194 (Support clobber_abi in BPF inline assembly)
- #136325 (Delay a bug when indexing unsized slices)
- #136326 (Replace our `LLVMRustDIBuilderRef` with LLVM-C's `LLVMDIBuilderRef`)
- #136330 (Remove unnecessary hooks)
- #136336 (Overhaul `rustc_middle::util`)
- #136341 (Remove myself from vacation)
r? `@ghost`
`@rustbot` modify labels: rollup
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Insert null checks for pointer dereferences when debug assertions are enabled
Similar to how the alignment is already checked, this adds a check
for null pointer dereferences in debug mode. It is implemented similarly
to the alignment check as a `MirPass`.
This inserts checks in the same places as the `CheckAlignment` pass and additionally
also inserts checks for `Borrows`, so code like
```rust
let ptr: *const u32 = std::ptr::null();
let val: &u32 = unsafe { &*ptr };
```
will have a check inserted on dereference. This is done because null references
are UB. The alignment check doesn't cover these places, because in `&(*ptr).field`,
the exact requirement is that the final reference must be aligned. This is something to
consider further enhancements of the alignment check.
For now this is implemented as a separate `MirPass`, to make it easy to disable
this check if necessary.
This is related to a 2025H1 project goal for better UB checks in debug
mode: https://github.com/rust-lang/rust-project-goals/pull/177.
r? `@saethlin`
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