By putting them in `TtParser`, we can reuse them for every rule in a
macro. With that done, they can be `SmallVec` instead of `Vec`, and this
is a performance win because these vectors are hot and `SmallVec`
operations are a bit slower due to always needing an "inline or heap?"
check.
This type was a small performance win for `html5ever`, which uses a
macro with hundreds of very simple rules that don't contain any
metavariables. But this type is complicated (extra lifetimes) and
perf-neutral for macros that do have metavariables.
This commit removes `MatcherPosHandle`, simplifying things a lot. This
increases the allocation rate for `html5ever` and similar cases a bit,
but makes things easier for follow-up changes that will improve
performance more than what we lost here.
It currently has no state, just the three methods `parse_tt`,
`parse_tt_inner`, and `bb_items_ambiguity_error`.
This commit is large but trivial, and mostly consists of changes to the
indentation of those methods. Subsequent commits will do more.
Rollup of 4 pull requests
Successful merges:
- #95013 (Update browser-ui-test version to 0.8.2)
- #95039 (Make negative coherence work when there's impl negative on super predicates)
- #95047 (Refactor: remove an unnecessary pattern for ignoring all parts)
- #95048 (update Miri)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Update browser-ui-test version to 0.8.2
It brings mostly debugging improvements: it doesn't stop at the first failing command but rather at the first "fatal error".
r? `@notriddle`
Implement -Z oom=panic
This PR removes the `#[rustc_allocator_nounwind]` attribute on `alloc_error_handler` which allows it to unwind with a panic instead of always aborting. This is then used to implement `-Z oom=panic` as per RFC 2116 (tracking issue #43596).
Perf and binary size tests show negligible impact.
Rollup of 10 pull requests
Successful merges:
- #91133 (Improve `unsafe` diagnostic)
- #93222 (Make ErrorReported impossible to construct outside `rustc_errors`)
- #93745 (Stabilize ADX target feature)
- #94309 ([generator_interior] Be more precise with scopes of borrowed places)
- #94698 (Remove redundant code from copy-suggestions)
- #94731 (Suggest adding `{ .. }` around a const function call with arguments)
- #94960 (Fix many spelling mistakes)
- #94982 (Add deprecated_safe feature gate and attribute, cc #94978)
- #94997 (debuginfo: Fix ICE when generating name for type that produces a layout error.)
- #95000 (Fixed wrong type name in comment)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Remove redundant code from copy-suggestions
Follow up to #94375, just remove some code that is not necessary anymore. This may make the perf of such suggestions a little bit worse, but I don't think this is significant.
r? `@estebank`
[generator_interior] Be more precise with scopes of borrowed places
Previously the generator interior type checking analysis would use the nearest temporary scope as the scope of a borrowed value. This ends up being overly broad for cases such as:
```rust
fn status(_client_status: &Client) -> i16 {
200
}
fn main() {
let client = Client;
let g = move || match status(&client) {
_status => yield,
};
assert_send(g);
}
```
In this case, the borrow `&client` could be considered in scope for the entirety of the `match` expression, meaning it would be viewed as live across the `yield`, therefore making the generator not `Send`.
In most cases, we want to use the enclosing expression as the scope for a borrowed value which will be less than or equal to the nearest temporary scope. This PR changes the analysis to use the enclosing expression as the scope for most borrows, with the exception of borrowed RValues which are true temporary values that should have the temporary scope. There's one further exception where borrows of a copy such as happens in autoref cases also should be ignored despite being RValues.
Joint work with `@nikomatsakis`
Fixes#57017
r? `@tmandry`
Stabilize ADX target feature
This is a continuation of #60109, which noted that while the ADX intrinsics were stabilized, the corresponding target feature never was.
This PR follows the same general structure and stabilizes the ADX target feature.
See also https://github.com/rust-lang/rust/issues/44839 - tracking issue for target feature
Make ErrorReported impossible to construct outside `rustc_errors`
There are a few places were we have to construct it, though, and a few
places that are more invasive to change. To do this, we create a
constructor with a long obvious name.
cc #69426 `@varkor` `@eddyb` `@estebank`
I actually didn't see that I was assigned to this issue until now...
erase late-bound regions in dyn projection types for debuginfo
simply skipping the binder leaves late-bound regions that will cause debug assertions to fail when checking the layout of the projection ty, so let's erase the regions instead.
sorry for taking so long to put this up, had trouble getting rustc set up on a new computer.
fixes#94998
Fix cmake build.
This is an attempt to fix the cmake build. For some reason, it has recently started failing with a permission denied trying to overwrite `/tmp/build.log`. This file exists from the `build-toolchains.sh` step, which is owned by the rustbuild user. I think there is some behavior where a sticky `/tmp` directory doesn't allow overwriting files owned by other users even when running as root. I do not know why this has suddenly started, and I can't reproduce locally with my own docker setup. However, this fix seems to work on CI.
There are a few places were we have to construct it, though, and a few
places that are more invasive to change. To do this, we create a
constructor with a long obvious name.
