Get `!nonnull` metadata on slice iterators, without `assume`s
This updates the non-ZST paths to read the end pointer through a pointer-to-`NonNull`, so that they all get `!nonnull` metadata.
That means that the last `assume(!ptr.is_null())` can be deleted, without impacting codegen -- the codegen tests confirm the LLVM-IR ends up exactly the same as before.
Always const-prop scalars and scalar pairs
This removes some complexity from the pass.
The limitation to propagate ScalarPairs only for tuple comes from https://github.com/rust-lang/rust/pull/67015, when ScalarPair constant were modeled using `Rvalue::Aggregate`. Nowadays, we use `ConstValue::ByRef`, which does not care about the underlying type.
The justification for not propagating in all cases was perf. This seems not to be a clear cut any more: https://github.com/rust-lang/rust/pull/113858#issuecomment-1642396746
Refactor vtable encoding and optimize it for the case of multiple marker traits
This PR does two things
- Refactor `prepare_vtable_segments` (this was motivated by the other change, `prepare_vtable_segments` was quite hard to understand and while trying to edit it I've refactored it)
- Mostly remove `loop`s labeled `break`s/`continue`s whenever there is a simpler solution
- Also use `?`
- Make vtable format a bit more efficient wrt to marker traits
- See the tests for an example
Fixes https://github.com/rust-lang/rust/issues/113840
cc `@crlf0710`
----
Review wise it's probably best to review each commit individually, as then it's more clear why the refactoring is correct.
I can split the last two commits (which change behavior) into a separate PR if it makes reviewing easier
Querify unused trait check.
This code transitively loads information for all bodies, and from resolutions. As it does not return a value, it should be beneficial to have it as a query.
Don't translate compiler-internal bug messages
These are not very useful to be translated, as
* translators would get really weird and bad english versions to start out from,
* compiler devs have to do some work for what is supposed to be dead code and just a sanity check,
* the target audience is other compiler devs.
r? `@davidtwco`
Remove outdated Firefox-specific CSS for search's crate selector appearance
Remove adjustments that used to be necessary for search's crate selector appearance (padding) to look identical on Firefox. New versions of Firefox appear to have changed behavior to agree with Chrome.
As briefly discussed in https://github.com/rust-lang/rust/pull/98855#issuecomment-1624098112
r? ``@GuillaumeGomez``
new solver: don't consider blanket impls multiple times
only consider candidates which rely on the self type in `assemble_candidates_after_normalizing_self_ty`.
r? ``@compiler-errors``
rustdoc: fix position of `default` in method rendering
With the following code:
```rs
#![feature(specialization)]
pub trait A {
unsafe fn a();
}
impl A for () {
default unsafe fn a() {}
}
```
rustdoc would render the `impl` of `a` as
```rs
unsafe default fn a()
```
which is inconsistent with the actual position of `default`.
This PR fixes this issue.
Turn copy into moves during DSE.
Dead store elimination computes whether removing a direct store to an unborrowed place is allowed.
Where removing a store is allowed, writing `uninit` is too.
This means that we can use this pass to transform `copy` operands into `move` operands. This is only interesting in call terminators, so we only handle those.
Special care is taken for the `use_both(_1, _1)` case:
- moving the second argument is ok, as `_1` is not live after the call;
- moving the first argument is not, as the second argument reads `_1`.
Fixes#75993
Fixes https://github.com/rust-lang/rust/issues/108068
r? `@RalfJung`
cc `@JakobDegen`
editor/code: [DX] Use notification command links for debugger installation
This PR improves DX (developer experience) when installing the VS Code extension for the first time. When doing so and trying to debug a Rust file, we get an error notification that either CodeLLDB or C++ extension/debugger should be installed (see image below).
<div align="center">
<img src="https://github.com/rust-lang/rust-analyzer/assets/20957750/e8ebeb1e-85f4-44e2-b79f-c48cf52e5f36" alt="Rust, prompt to install debug extension">
</div>
The PR enhances the links in the given notification and upon clicking instead of opening the Web page of the extension it installs the extension immediately, without the need to leave the editor.
Note: the feature needs to be refined, maybe an "install in progress" message or something similar, I left that for you guys to decide and implement. I think it also possible to first open the sidebar, open the Extensions tab, then run the extension installation command which would make it more user-friendly.
P.S. it is also possible to open the extension's details in VS Code directly via the same links and then the user would have to manually click on the Install button - if installation is not the desired behavior.
Happy coding! 🎉
Pass `TraitEnvironment` into `layout_ty` and `const_eval`
We need to do either this or get rid of trait environment in `normalize_ty`. Let's go with this for now.
