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Fixes #97047
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hidden types for opaque types
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sidebar
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r=oli-obk
Added llvm lifetime annotations to function call argument temporaries.
The goal of this change is to ensure that llvm will do stack slot
optimization on these temporaries. This ensures that in code like:
```rust
const A: [u8; 1024] = [0; 1024];
fn copy_const() {
f(A);
f(A);
}
```
we only use 1024 bytes of stack space, instead of 2048 bytes.
I am new to developing for the rust compiler, and as such not entirely sure, but I believe this should be sufficient to close #98156.
Also, this does not contain a test case to ensure this keeps working, primarily because I am not sure how to go about testing this. I would love some suggestions as to how that could be approached.
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In the diagnostic derive test, a "the following other types implement
trait" diagnostic is output which lists rustc types that implement
`IntoDiagnosticArg`. As the output of this test can change due to new
internal compiler types like implementing `IntoDiagnosticArg`, it can
start failing without indicating a problem to be fixed - so normalize
that output away.
Signed-off-by: David Wood <david.wood@huawei.com>
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Signed-off-by: David Wood <david.wood@huawei.com>
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Signed-off-by: David Wood <david.wood@huawei.com>
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Instead we generate a discriminant rvalue and cast the result of that.
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use MCVE
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Rollup of 6 pull requests
Successful merges:
- #96727 (Make TAIT behave exactly like RPIT)
- #98681 (rustdoc-json: Make default value of blanket impl assoc types work)
- #98682 (add tests for ICE 94432)
- #98683 (add test for ice 68875)
- #98685 (Replace `sort_modules_alphabetically` boolean with enum)
- #98687 (add test for 47814)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
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add test for 47814
not sure if the issue should actually get closed though, hm
r? ``@compiler-errors``
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add test for ice 68875
Fixes #68875
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add tests for ICE 94432
Fixes #94432
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Enselic:rustdoc-json-default-assoc-type-blanket-impl, r=GuillaumeGomez
rustdoc-json: Make default value of blanket impl assoc types work
Closes #98658
r? ``@GuillaumeGomez``
``@rustbot`` labels +A-rustdoc-json
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Make TAIT behave exactly like RPIT
fixes https://github.com/rust-lang/rust/issues/96552
This makes type-alias-impl-trait behave like return-position-impl-trait. Unfortunately it also causes some cases to stop compiling due to "needing type annotations" and makes panicking cause fallback for the hidden type to `()`.
All of these are addressable, but we should probably address them for RPIT and TAIT together
r? ``@lcnr``
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interpret: adjust error from constructing an invalid value
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not sure if the issue should actually get closed though, hm
r? @compiler-errors
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Fixes #46511
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Fixes #72793
r? @oli-obk
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Fixes #68875
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Fixes #94432
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Use verbose help for deprecation suggestion
Fixes #98631
r? `@compiler-errors`
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Unbreak stage1 tests via ignore-stage1 in `proc-macro/invalid-punct-ident-1.rs`.
#98188 broke `./x.py test --stage 1` (which I thought we ran in PR CI, cc `@rust-lang/infra)` i.e. the default `./x.py test` in dev checkouts, as the panic in `src/test/ui/proc-macro/invalid-punct-ident-1.rs` moved from the server (`rustc`) to the client (proc macro), and that means it's now affected by #59998.
I made the test look like `src/test/ui-fulldeps/issue-76270-panic-in-libproc-macro.rs` tho I'm a bit confused why that one is in `src/test/ui-fulldeps`, it should still work in `src/test/ui`, no? (cc `@Aaron1011)`
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r=joshtriplett
`alloc`: clean and ensure `no_global_oom_handling` builds are warning-free
Rust 1.62.0 introduced a couple new `unused_imports` warnings
in `no_global_oom_handling` builds, making a total of 5 warnings.
<details>
```txt
warning: unused import: `Unsize`
--> library/alloc/src/boxed/thin.rs:6:33
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6 | use core::marker::{PhantomData, Unsize};
| ^^^^^^
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= note: `#[warn(unused_imports)]` on by default
warning: unused import: `from_fn`
--> library/alloc/src/string.rs:51:18
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51 | use core::iter::{from_fn, FusedIterator};
| ^^^^^^^
warning: unused import: `core::ops::Deref`
--> library/alloc/src/vec/into_iter.rs:12:5
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12 | use core::ops::Deref;
| ^^^^^^^^^^^^^^^^
warning: associated function `shrink` is never used
--> library/alloc/src/raw_vec.rs:424:8
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424 | fn shrink(&mut self, cap: usize) -> Result<(), TryReserveError> {
| ^^^^^^
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= note: `#[warn(dead_code)]` on by default
warning: associated function `forget_remaining_elements` is never used
--> library/alloc/src/vec/into_iter.rs:126:19
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126 | pub(crate) fn forget_remaining_elements(&mut self) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^
```
</details>
This PR cleans them and ensures no new ones are introduced
so that projects compiling `alloc` without infallible allocations
do not see them (and may want to enable `-Dwarnings`).
The couple `dead_code` ones may be reverted when some fallible
allocation support starts using them.
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rustdoc: fix bugs in main.js popover help and settings
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Improve pretty printing of valtrees for references
This implements the changes outlined in https://github.com/rust-lang/rust/issues/66451#issuecomment-1168859638.
r? `@lcnr`
Fixes #66451
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Fix #98260
Fixes https://github.com/rust-lang/rust/issues/98260
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Fixes #93117
Fixes #96258
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emit Retag for compound types with reference fields
I want to add an option to Miri to do retagging inside reference fields. But that means we first have to even emit `Retag` for types that *contain* references (rather than being of reference types). :)
Stacked Borrows originally did that, but we stopped doing it when hitting bunch of issues in the standard library. However I have since realized that we actually do emit `noalias` for newtypes references, which means for soundness we should recurse into fields. Also it'd probably be bad news if newtypes lose out on optimizations (and they don't, for anything else). I want to add an option for that to Miri so that we can start experimenting with those semantics.
r? ``@oli-obk``
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Clean up arg mismatch diagnostic, generalize tuple wrap suggestion
This is based on top of #97542, so just look at the last commit which contains the relevant changes.
1. Remove `final_arg_types` which was one of the last places we were using raw (`usize`) indices instead of typed indices in the arg mismatch suggestion code.
2. Improve the tuple wrap suggestion, now we suggest things like `call(a, b, c, d)` -> `call(a, (b, c), d)` :smiley_cat:
3. Folded in fix #98645
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Erase regions in New Abstract Consts
When an abstract const is constructed, we previously included lifetimes in the set of substitutes, so it was not able to unify two abstract consts if their lifetimes did not match but the values did, despite the values not depending on the lifetimes. This caused code that should have compiled to not compile.
Fixes #98452
r? ```@lcnr```
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compiler-errors:rustc-borrowck-session-diagnostic-1, r=davidtwco
Migrate some `rustc_borrowck` diagnostics to `SessionDiagnostic`
Self-explanatory
r? ```@davidtwco```
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r=davidtwco
Some borrowck diagnostic fixes
1. Remove some redundant `.as_ref` suggestion logic from borrowck, this has the consequence of also not suggesting `.as_ref` after `Option` methods, but (correctly) before.
2. Fix a bug where we were replacing a binding's name with a type. Instead, make it a note.
This is somewhat incomplete. See `src/test/ui/borrowck/suggest-as-ref-on-mut-closure.rs` for more improvements.
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Add regression test for #79224
Closes #79224
r? `@compiler-errors`
Signed-off-by: Yuki Okushi <jtitor@2k36.org>
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Fix trait object reborrow suggestion
Fixes #93596
Slightly generalizes the logic we use to suggest fix first implemented in #95609, specifically when we have a `Sized` obligation that comes from a struct's unsized tail.
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Use typed indices in argument mismatch algorithm
I kinda went overboard with the renames, but in general, "arg" is renamed to "expected", and "input" is renamed to "provided", and we use new typed indices to make sure we're indexing into the right sized array.
Other drive-by changes:
1. Factor this logic into a new function, so we don't need to `break 'label` to escape it.
1. Factored out dependence on `final_arg_types`, which is never populated for arguments greater than the number of expected args. Instead, we just grab the final coerced expression type from `in_progress_typeck_results`.
1. Adjust the criteria we use to print (provided) type names, before we didn't suggest anything that had infer vars, but now we suggest thing that have infer vars but aren't `_`.
~Also, sorry in advance, I kinda want to backport this but I know I have folded in a lot of unnecessary drive-by changes that might discourage that. I would be open to brainstorming how to get some of these changes on beta at least.~ edit: Minimized the ICE-fixing changes to #97557
cc `@jackh726` as author of #92364, and `@estebank` as reviewer of the PR.
fixes #97484
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Simplify memory ordering intrinsics
This changes the names of the atomic intrinsics to always fully include their memory ordering arguments.
```diff
- atomic_cxchg
+ atomic_cxchg_seqcst_seqcst
- atomic_cxchg_acqrel
+ atomic_cxchg_acqrel_release
- atomic_cxchg_acqrel_failrelaxed
+ atomic_cxchg_acqrel_relaxed
// And so on.
```
- `seqcst` is no longer implied
- The failure ordering on chxchg is no longer implied in some cases, but now always explicitly part of the name.
- `release` is no longer shortened to just `rel`. That was especially confusing, since `relaxed` also starts with `rel`.
- `acquire` is no longer shortened to just `acq`, such that the names now all match the `std::sync::atomic::Ordering` variants exactly.
- This now allows for more combinations on the compare exchange operations, such as `atomic_cxchg_acquire_release`, which is necessary for #68464.
- This PR only exposes the new possibilities through unstable intrinsics, but not yet through the stable API. That's for [a separate PR](https://github.com/rust-lang/rust/pull/98383) that requires an FCP.
Suffixes for operations with a single memory order:
| Order | Before | After |
|---------|--------------|------------|
| Relaxed | `_relaxed` | `_relaxed` |
| Acquire | `_acq` | `_acquire` |
| Release | `_rel` | `_release` |
| AcqRel | `_acqrel` | `_acqrel` |
| SeqCst | (none) | `_seqcst` |
Suffixes for compare-and-exchange operations with two memory orderings:
| Success | Failure | Before | After |
|---------|---------|--------------------------|--------------------|
| Relaxed | Relaxed | `_relaxed` | `_relaxed_relaxed` |
| Relaxed | Acquire | :x: | `_relaxed_acquire` |
| Relaxed | SeqCst | :x: | `_relaxed_seqcst` |
| Acquire | Relaxed | `_acq_failrelaxed` | `_acquire_relaxed` |
| Acquire | Acquire | `_acq` | `_acquire_acquire` |
| Acquire | SeqCst | :x: | `_acquire_seqcst` |
| Release | Relaxed | `_rel` | `_release_relaxed` |
| Release | Acquire | :x: | `_release_acquire` |
| Release | SeqCst | :x: | `_release_seqcst` |
| AcqRel | Relaxed | `_acqrel_failrelaxed` | `_acqrel_relaxed` |
| AcqRel | Acquire | `_acqrel` | `_acqrel_acquire` |
| AcqRel | SeqCst | :x: | `_acqrel_seqcst` |
| SeqCst | Relaxed | `_failrelaxed` | `_seqcst_relaxed` |
| SeqCst | Acquire | `_failacq` | `_seqcst_acquire` |
| SeqCst | SeqCst | (none) | `_seqcst_seqcst` |
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