Rollup of 8 pull requests#152282
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rust-bors[bot] merged 21 commits intorust-lang:mainfrom Feb 7, 2026
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`cold_path` has been around unstably for a while and is a rather useful
tool to have. It does what it is supposed to and there are no known
remaining issues, so stabilize it here (including const).
Newly stable API:
// in core::hint
pub const fn cold_path();
I have opted to exclude `likely` and `unlikely` for now since they have
had some concerns about ease of use that `cold_path` doesn't suffer
from. `cold_path` is also significantly more flexible; in addition to
working with boolean `if` conditions, it can be used in `match` arms,
`if let`, closures, and other control flow blocks. `likely` and
`unlikely` are also possible to implement in user code via `cold_path`,
if desired.
and deprecate fetch_update starting 1.99.0
We only run LLDB 1500 in CI. Any test with a min-lldb-version above that is currently ignored. It's not clear any of these tests actually work with that LLDB version, and they definitely don't work on LLDB ~2100. So, ignore them until we fix debuginfo testing.
Because `Cache` is unhelpfully vague.
stabilizes `core::range::RangeInclusive` and `core::range::RangeInclusiveIter` and the `core::range` module
…jhpratt Stabilize `atomic_try_update`and deprecate `fetch_update` starting 1.99.0 Tracking issue: rust-lang#135894 FCP completed: rust-lang#135894 (comment) ~1.96.0 was chosen because I don't think the remaining month until 1.93.0 becomes beta is enough for the FCP to finish and this to get merged, so 1.94.0 + a couple of versions of leeway: rust-lang#135894 (comment) 1.99 suggested in rust-lang#148590 (comment) Closes rust-lang#135894
…, r=tgross35 Stabilize new inclusive range type and iterator type Part 1 of stabilizing the new range types for rust-lang#125687 stabilizes `core::range::RangeInclusive` and `core::range::RangeInclusiveIter`. Newly stable API: ```rust // in core and std pub mod range; // in core::range pub struct RangeInclusive<Idx> { pub start: Idx, pub last: Idx, } impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> { /* ... */ } impl<Idx: PartialOrd<Idx>> RangeInclusive<Idx> { pub const fn contains<U>(&self, item: &U) -> bool where Idx: [const] PartialOrd<U>, U: ?Sized + [const] PartialOrd<Idx>; pub const fn is_empty(&self) -> bool where Idx: [const] PartialOrd; } impl<Idx: Step> RangeInclusive<Idx> { pub fn iter(&self) -> RangeInclusiveIter<Idx>; } impl<T> const RangeBounds<T> for RangeInclusive<T> { /* ... */ } impl<T> const RangeBounds<T> for RangeInclusive<&T> { /* ... */ } impl<T> const From<RangeInclusive<T>> for legacy::RangeInclusive<T> { /* ... */ } impl<T> const From<legacy::RangeInclusive<T>> for RangeInclusive<T> { /* ... */ } pub struct RangeInclusiveIter<A>(/* ... */); impl<A: Step> RangeInclusiveIter<A> { pub fn remainder(self) -> Option<RangeInclusive<A>>; } impl<A: Step> Iterator for RangeInclusiveIter<A> { type Item = A; /* ... */ } impl<A: Step> DoubleEndedIterator for RangeInclusiveIter<A> { /* ... */ } impl<A: Step> FusedIterator for RangeInclusiveIter<A> { } impl<A: Step> IntoIterator for RangeInclusive<A> { type Item = A; type IntoIter = RangeInclusiveIter<A>; /* ... */ } impl ExactSizeIterator for RangeInclusiveIter<u8> { } impl ExactSizeIterator for RangeInclusiveIter<i8> { } unsafe impl<T> const SliceIndex<[T]> for range::RangeInclusive<usize> { type Output = [T]; /* ... */ } unsafe impl const SliceIndex<str> for range::RangeInclusive<usize> { type Output = str; /* ... */ } ``` I've removed the re-exports temporarily because from what I can tell, there's no way to make re-exports of stable items unstable. They will be added back and stabilized in a separate PR.
…onathanBrouwer Convert to inline diagnostics in `rustc_parse` This was the most annoying one by far, had to make a few changes to the representation of two errors (no user-facing changes tho), these changes are in separate commits for clarity :) For rust-lang#151366 r? @jdonszelmann
…scii, r=dtolnay feat: Implement `int_from_ascii` for `NonZero<T>` - Tracking issue: rust-lang#134821 This pull request adds `from_ascii` and `from_ascii_radix` methods to `NonZero<T>` that parses a non-zero integer from an ASCII-byte slice (`&[u8]`) with decimal digits or digits in a given base. When using the combination of `int::from_ascii` or `int::from_ascii_radix` and `NonZero::<T>::new`, [`IntErrorKind::Zero`](https://doc.rust-lang.org/core/num/enum.IntErrorKind.html#variant.Zero) cannot be returned as an error. `NonZero::<T>::from_str_radix` and `NonZero::<T>::from_str` require a string (`&str`) as a parameter. ```rust // Cannot return `IntErrorKind::Zero` as an error. assert_eq!(NonZero::new(u8::from_ascii(b"0").unwrap()), None); // Can return `IntErrorKind::Zero` as an error. let err = NonZero::<u8>::from_ascii(b"0").unwrap_err(); assert_eq!(err.kind(), &IntErrorKind::Zero); ``` See also rust-lang#152193
…pratt Stabilize `core::hint::cold_path` `cold_path` has been around unstably for a while and is a rather useful tool to have. It does what it is supposed to and there are no known remaining issues, so stabilize it here (including const). Newly stable API: ```rust // in core::hint pub const fn cold_path(); ``` I have opted to exclude `likely` and `unlikely` for now since they have had some concerns about ease of use that `cold_path` doesn't suffer from. `cold_path` is also significantly more flexible; in addition to working with boolean `if` conditions, it can be used in `match` arms, `if let`, closures, and other control flow blocks. `likely` and `unlikely` are also possible to implement in user code via `cold_path`, if desired. Closes: rust-lang#136873 (tracking issue) --- There has been some design and implementation work for making `#[cold]` function in more places, such as `if` arms, `match` arms, and closure bodies. Considering a stable `cold_path` will cover all of these usecases, it does not seem worth pursuing a more powerful `#[cold]` as an alternative way to do the same thing. If the lang team agrees, then: Closes: rust-lang#26179 Closes: rust-lang#120193
…-lto, r=nnethercote Linker-plugin-based LTO: give an explanation how to use linker-plugin-lto with full LTO Closes rust-lang#138910 The existing linker-plugin-based LTO documentation does not describe the correct usage of full LTO. Specifically, when invoking `rustc` with full LTO, the `-C lto` flag must be passed in addition to `-C linker-plugin-lto`. Also, this PR documents the use of full LTO when linking Rust with Fortran. Unfortunately, LLVM `flang` does not currently support ThinLTO, so full LTO is the only viable option in this case. Toolchain combinations were slightly updated. TODO: - [x] check swiftc compiler. Almost unusable. - [x] check how std lib is actually compiled - [x] add note about LLD and bitcode - [x] report bug to LLVM: llvm/llvm-project#179800 <details> <summary>Swiftc is unusable</summary> https://www.swift.org/install/ gave me LLVM-17. During playing with swift main + rust static library, LLVM-23 removed main :D ```console # thin LTO Rust: rustc --crate-type=staticlib -Clinker-plugin-lto -Copt-level=3 ./ftn.rs # full LTO swift: swiftc -static libftn.a main.swift -lto=llvm-full -O -use-ld=/tmp/test/llvm-project/install/bin/ld.lld -Xlinker --gc-sections -Xlinker --as-needed -o sr ./sr > ftn() returned: 77 # thin LTO swift: swiftc -static libftn.a main.swift -lto=llvm-thin -O -use-ld=/tmp/test/llvm-project/install/bin/ld.lld -Xlinker --gc-sections -Xlinker --as-needed -o sr ./sr > No output ``` </details>
…er-say-about-the-lldb-version-level, r=Noratrieb Ignore all debuginfo tests for LLDB that we do not run in CI We only run LLDB 1500 in CI. Any test with a min-lldb-version above that is currently ignored. It's not clear any of these tests actually work with that LLDB version, and they definitely don't work on LLDB ~2100. So, ignore them until we fix debuginfo testing. Fixes rust-lang#151966
…cache, r=Zalathar Move `rustc_query_system::cache`. It only defines two types, `Cache` and `WithDepNode`. Neither has anything much to do with queries -- they use `DepNodeIndex`, that's all. This commit moves the module into `rustc_middle`, to where they are used. It also renames the extremely non-descriptive `Cache` as `WithDepNodeCache`. r? @Zalathar
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@bors r+ rollup=never p=5 |
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📌 Perf builds for each rolled up PR:
previous master: 06cafcbe08 In the case of a perf regression, run the following command for each PR you suspect might be the cause: |
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What is this?This is an experimental post-merge analysis report that shows differences in test outcomes between the merged PR and its parent PR.Comparing 06cafcb (parent) -> 8c5605e (this PR) Test differencesShow 2781 test diffsStage 0
Stage 1
Stage 2
(and 313 additional test diffs) Additionally, 2368 doctest diffs were found. These are ignored, as they are noisy. Job group index Test dashboardRun cargo run --manifest-path src/ci/citool/Cargo.toml -- \
test-dashboard 8c5605e130081cbff57f505c56466538039346b1 --output-dir test-dashboardAnd then open Job duration changes
How to interpret the job duration changes?Job durations can vary a lot, based on the actual runner instance |
This was referenced Feb 7, 2026
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Finished benchmarking commit (8c5605e): comparison URL. Overall result: ✅ improvements - no action needed@rustbot label: -perf-regression Instruction countOur most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.
Max RSS (memory usage)Results (primary -6.4%, secondary 5.6%)A less reliable metric. May be of interest, but not used to determine the overall result above.
CyclesResults (secondary 6.6%)A less reliable metric. May be of interest, but not used to determine the overall result above.
Binary sizeResults (secondary -0.0%)A less reliable metric. May be of interest, but not used to determine the overall result above.
Bootstrap: 473.906s -> 472.649s (-0.27%) |
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The regression looks like noise to me, the improvements are caused by #152235 |
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Successful merges:
atomic_try_updateand deprecatefetch_updatestarting 1.99.0 #148590 (Stabilizeatomic_try_updateand deprecatefetch_updatestarting 1.99.0)rustc_parse#152235 (Convert to inline diagnostics inrustc_parse)int_from_asciiforNonZero<T>#152267 (feat: Implementint_from_asciiforNonZero<T>)core::hint::cold_path#151576 (Stabilizecore::hint::cold_path)rustc_query_system::cache. #152199 (Moverustc_query_system::cache.)r? @ghost
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