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Explicitly forget the zero remaining elements in `vec::IntoIter::fold()`. [Original description:] ~~This seems to help LLVM notice that dropping the elements in the destructor of `IntoIter` is not necessary. In cases it doesn’t help, it should be cheap since it is just one assignment.~~ This PR adds a function to `vec::IntoIter()` which is used used by `fold()` and `spec_extend()`, when those operations complete, to forget the zero remaining elements and only deallocate the allocation, ensuring that there will never be a useless loop to drop zero remaining elements when the iterator is dropped. This is my first ever attempt at this kind of codegen micro-optimization in the standard library, so please let me know what should go into the PR or what sort of additional systematic testing might indicate this is a good or bad idea.
stdarch subtree update Subtree update of `stdarch` to 0956462. Created using https://github.com/rust-lang/josh-sync. r? @ghost
add llvm writable attribute conditionally This PR tries to address rust-lang/unsafe-code-guidelines#584 (comment). It is part of a bachelor thesis supervised by @JoJoDeveloping and @RalfJung, for more information, see: [Project_Description.pdf](https://github.com/user-attachments/files/26537277/Project_Description.pdf). If the new `-Zllvm-writable` flag is set, the [llvm writable attribute](https://llvm.org/docs/LangRef.html#writable) is inserted for all mutable borrows. This can be conditionally turned off on a per-function basis using the `#[rustc_no_writable]` attribute. The new Undefined Behaviour introduced by this can detected by Miri, which is implemented here: rust-lang/miri#4947. Two library functions already received the `#[rustc_no_writable]` attribute, as they are known to cause problems under the Tree Borrows aliasing model with implicit writes enabled.
Clippy subtree update r? Manishearth `Cargo.lock` update due to Clippy version bump and cargo_metadata dep bump in Clippy.
…miasko,cjgillot,saethlin
Remove fewer Storage calls in CopyProp and GVN
Modify the CopyProp and GVN MIR optimization passes to remove fewer `Storage{Live,Dead}` calls, allowing for better optimizations by LLVM - see rust-lang/rust#141649.
### Details
The idea is to use a new `MaybeUninitializedLocals` analysis and remove only the storage calls of locals that are maybe-uninit when accessed in a new location.
Refactor FnDecl and FnSig non-type fields into a new wrapper type #### Why this Refactor? This PR is part of an initial cleanup for the [arg splat experiment](rust-lang/rust#153629), but it's a useful refactor by itself. It refactors the non-type fields of `FnDecl`, `FnSig`, and `FnHeader` into a new packed wrapper types, based on this comment in the `splat` experiment PR: rust-lang/rust#153697 (comment) It also refactors some common `FnSig` creation settings into their own methods. I did this instead of creating a struct with defaults. #### Relationship to `splat` Experiment I don't think we can use functional struct updates (`..default()`) to create `FnDecl` and `FnSig`, because we need the bit-packing for the `splat` experiment. Bit-packing will avoid breaking "type is small" assertions for commonly used types when `splat` is added. This PR packs these types: - ExternAbi: enum + `unwind` variants (38) -> 6 bits - ImplicitSelfKind: enum variants (5) -> 3 bits - lifetime_elision_allowed, safety, c_variadic: bool -> 1 bit #### Minor Changes Fixes some typos, and applies rustfmt to clippy files that got skipped somehow.
Update cargo submodule 28 commits in eb94155a9a60943bd7b1cb04abec42f5d0de6ddc..7ecf0285ebb408d596e4a8ac76a0980d8edb7005 2026-04-09 13:10:20 +0000 to 2026-04-18 15:34:11 +0000 - fix: use `portable-atomic` for 64-bit atomics (rust-lang/cargo#16906) - fix: rename incorrectly documented target-spec-json to json-target-sp… (rust-lang/cargo#16905) - Add global HTTP timeout tracking to http_async (rust-lang/cargo#16903) - feat(config): Stabilize `resolver.lockfile-path` config (rust-lang/cargo#16694) - chore(deps): update msrv (1 version) to v1.95 (rust-lang/cargo#16897) - fix: rebuild rustdoc json for different versions of a same crate (rust-lang/cargo#16773) - Add effective_url to http_async (rust-lang/cargo#16899) - Make crate downloads process as a queue rather than a stack (rust-lang/cargo#16898) - fix: sparse registry fetch progress reporting (rust-lang/cargo#16900) - chore: bump to 0.98.0; update changelog (rust-lang/cargo#16892) - docs(semver-check): update diagnostics to Rust 1.95 (rust-lang/cargo#16895) - docs(ref): Better highlight 'package --list' for include/exclude (rust-lang/cargo#16891) - docs: `include` doesnt apply gitignore from repo (rust-lang/cargo#16890) - fix: Update `bash` and `zsh` Autocompletion Documents to add `-m` (rust-lang/cargo#16888) - Add `-m` shorthand for `--manifest-path` (rust-lang/cargo#16858) - Fix a typo (rust-lang/cargo#16885) - Always take a shared lock on `.cargo-lock` (rust-lang/cargo#16886) - fix(toml): Teach users how to pin edition (rust-lang/cargo#16851) - fix: Prefer defined lint levels over default (rust-lang/cargo#16879) - chore(deps): bump rand from 0.10.0 to 0.10.1 (rust-lang/cargo#16883) - fix(lints): Ignore unused_crate_dependencies status (rust-lang/cargo#16877) - Copy cargo clean target-dir validation tests to clean_new_layout.rs (rust-lang/cargo#16878) - cargo clean: Add target directory validation (rust-lang/cargo#16712) - Docs: "api" in the configuration should not include a trailing slash (rust-lang/cargo#16869) - fix(core): use `closest_msg` to suggest similar member name for mistyped `-p` (rust-lang/cargo#16844) - chore(ci): Pin GitHub Actions to commit SHAs (rust-lang/cargo#16868) - chore(ci): Update `actions/checkout` from v5 to v6 (rust-lang/cargo#16867) - Add test for cargo install with github fastpath (rust-lang/cargo#16866)
Update a bunch of dependencies to reduce windows-sys duplication This gets rid of windows-sys 0.60 and with the exception of curl and stacker it gets rid of windows-sys 0.59. For stacker getting rid of windows-sys 0.59 is blocked on rust-lang/stacker#145 and rust-lang/rust#155438.
This updates the rust-version file to e22c616e4e87914135c1db261a03e0437255335e.
Pull recent changes from https://github.com/rust-lang/rust via Josh. Upstream ref: rust-lang/rust@e22c616 Filtered ref: 47c3de5 Upstream diff: rust-lang/rust@e4fdb55...e22c616 This merge was created using https://github.com/rust-lang/josh-sync.
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r? @sayantn rustbot has assigned @sayantn. Use Why was this reviewer chosen?The reviewer was selected based on:
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