Stabilize `sha512`, `sm3` and `sm4` for x86 #140767

sayantn · 2025-05-07T19:53:29Z

This PR stabilizes the feature flag sha512_sm_x86 (tracking issue #126624).

Public API

The 3 x86 target features sha512, sm3 and sm4, and the associated intrinsics in stdarch.

These target features are very specialized, and are only used to signal the presence of the corresponding CPU instruction. They don't have any nontrivial interaction with the ABI (contrary to something like AVX), and serve the only purpose of enabling 10 stdarch intrinsics, all of which have been implemented and propagated to rustc via a stdarch submodule update.

Also, these were added in LLVM17, and as the minimum LLVM required for rustc is LLVM19, we are safe in that front too!

Associated PRs

Added SHA512, SM3, SM4 target-features and sha512_sm_x86 feature gate #126704
Add Runtime detection for SHA512, SM3 and SM4 stdarch#1592
Implement SHA512, SM3 and SM4 intrinsics stdarch#1790
Remove avx512dq and avx512vl implication for avx512fp16 #140389 (stdarch submodule update)
Stabilize sha512, sm3 and sm4 intrinsics and runtime detection stdarch#1796 (stabilizing the runtime detection and intrinsics)
Update stdarch submodule #141964 (stdarch submodule update for the stabilization of the runtime detection and intrinsics)

As all of the required tasks have been done (adding the target features to rustc, implementing their runtime detection in std_detect and implementing the associated intrinsics in core_arch), these target features can be stabilized now.

cc @rust-lang/lang
cc @rust-lang/libs-api for the intrinsics and runtime detection

I don't think anyone else worked on this feature, so no one else to ping, maybe cc @Amanieu. I will send the reference pr soon.

traviscross · 2025-05-13T07:46:55Z

Stabilizing target features are somewhat minimal as far as stabilizations go, but still, this is going to need something more in the way of a stabilization report in the description of this PR. We need some narrative about what we're stabilizing here and a review of the evidence about why it's OK for us to stabilize this now. Have a look at our new template for this in rust-lang/rustc-dev-guide#2219.

Please think too about who else in the Project has worked on this or related things and who might therefore be interested in this, and please ping those people here.

This will also need a PR to the Reference documenting the change, and that should be linked from the stabilization report as well.

@rustbot labels +S-waiting-on-documentation

Please renominate when the stabilization report is available.

.gitmodules

traviscross · 2025-05-14T06:58:12Z

is this okay? Or do I have to give more details?

Thanks for adding the details above. @scottmcm, @RalfJung, @workingjubilee, anything more you want to see for this sort of thing?

RalfJung · 2025-05-14T20:27:31Z

The main question are indeed ABI concerns, or more generally "is there any potential for problems when mixing code built with and without these target features". It seems the answer to that is "no".

The only other issue I think we had is, "does our minimum LLVM version support these target features".

sayantn · 2025-05-15T02:21:07Z

@RalfJung updated the text with the minimum llvm version

traviscross · 2025-05-15T04:17:43Z

Sounds OK to me then. Let's propose FCP.

@rfcbot fcp merge

rfcbot · 2025-05-15T04:17:46Z

Team member @traviscross has proposed to merge this. The next step is review by the rest of the tagged team members:

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

cc @rust-lang/lang-advisors: FCP proposed for lang, please feel free to register concerns.
See this document for info about what commands tagged team members can give me.

rfcbot · 2025-05-31T15:45:50Z

The final comment period, with a disposition to merge, as per the review above, is now complete.

As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed.

This will be merged soon.

bors · 2025-06-04T03:24:14Z

☔ The latest upstream changes (presumably #141984) made this pull request unmergeable. Please resolve the merge conflicts.

sayantn · 2025-06-04T06:14:09Z

I am updating the stdarch submodule in #141964, so I will update this after that merges

…eatures

traviscross

@rustbot labels -S-waiting-on-documentation

The FCP is complete. The Reference PR is approved. The impl looks OK to me, but let's...

r? tgross35

for final review.

tgross35 · 2025-06-09T08:45:15Z

Looks good to me as well, thanks @sayantn.

@bors r=traviscross,tgross35

bors · 2025-06-09T08:45:17Z

📌 Commit 632396e has been approved by traviscross,tgross35

It is now in the queue for this repository.

Rollup of 5 pull requests Successful merges: - #140767 (Stabilize `sha512`, `sm3` and `sm4` for x86) - #141001 (Make NonZero<char> possible) - #141993 (Use the in-tree `compiler-builtins` for the sysroot) - #142208 (Always consider `const _` items as live for dead code analysis) - #142238 (stabilize nonnull_provenance) r? `@ghost` `@rustbot` modify labels: rollup

Rollup merge of #140767 - sayantn:stabilize-sha512, r=traviscross,tgross35 Stabilize `sha512`, `sm3` and `sm4` for x86 This PR stabilizes the feature flag `sha512_sm_x86` (tracking issue #126624). # Public API The 3 `x86` target features `sha512`, `sm3` and `sm4`, and the associated intrinsics in stdarch. These target features are very specialized, and are only used to signal the presence of the corresponding CPU instruction. They don't have any nontrivial interaction with the ABI (contrary to something like AVX), and serve the only purpose of enabling 10 stdarch intrinsics, all of which have been implemented and propagated to rustc via a stdarch submodule update. Also, these were added in LLVM17, and as the minimum LLVM required for rustc is LLVM19, we are safe in that front too! # Associated PRs - #126704 - rust-lang/stdarch#1592 - rust-lang/stdarch#1790 - #140389 (stdarch submodule update) - rust-lang/stdarch#1796 (stabilizing the runtime detection and intrinsics) - #141964 (stdarch submodule update for the stabilization of the runtime detection and intrinsics) As all of the required tasks have been done (adding the target features to rustc, implementing their runtime detection in std_detect and implementing the associated intrinsics in core_arch), these target features can be stabilized now. cc `@rust-lang/lang` cc `@rust-lang/libs-api` for the intrinsics and runtime detection I don't think anyone else worked on this feature, so no one else to ping, maybe cc `@Amanieu.` I will send the reference pr soon.

Rollup of 5 pull requests Successful merges: - rust-lang/rust#140767 (Stabilize `sha512`, `sm3` and `sm4` for x86) - rust-lang/rust#141001 (Make NonZero<char> possible) - rust-lang/rust#141993 (Use the in-tree `compiler-builtins` for the sysroot) - rust-lang/rust#142208 (Always consider `const _` items as live for dead code analysis) - rust-lang/rust#142238 (stabilize nonnull_provenance) r? `@ghost` `@rustbot` modify labels: rollup

…cross,tgross35 Stabilize `sha512`, `sm3` and `sm4` for x86 This PR stabilizes the feature flag `sha512_sm_x86` (tracking issue rust-lang#126624). # Public API The 3 `x86` target features `sha512`, `sm3` and `sm4`, and the associated intrinsics in stdarch. These target features are very specialized, and are only used to signal the presence of the corresponding CPU instruction. They don't have any nontrivial interaction with the ABI (contrary to something like AVX), and serve the only purpose of enabling 10 stdarch intrinsics, all of which have been implemented and propagated to rustc via a stdarch submodule update. Also, these were added in LLVM17, and as the minimum LLVM required for rustc is LLVM19, we are safe in that front too! # Associated PRs - rust-lang#126704 - rust-lang/stdarch#1592 - rust-lang/stdarch#1790 - rust-lang#140389 (stdarch submodule update) - rust-lang/stdarch#1796 (stabilizing the runtime detection and intrinsics) - rust-lang#141964 (stdarch submodule update for the stabilization of the runtime detection and intrinsics) As all of the required tasks have been done (adding the target features to rustc, implementing their runtime detection in std_detect and implementing the associated intrinsics in core_arch), these target features can be stabilized now. cc `@rust-lang/lang` cc `@rust-lang/libs-api` for the intrinsics and runtime detection I don't think anyone else worked on this feature, so no one else to ping, maybe cc `@Amanieu.` I will send the reference pr soon.

Pkgsrc changes: * Adjust patches to adapt to upstream changes and new versions. * assosicated checksums Upstream changes relative to 1.88.0: Version 1.89.0 (2025-08-07) ========================== Language -------- - [Stabilize explicitly inferred const arguments (`feature(generic_arg_infer)`)] (rust-lang/rust#141610) - [Add a warn-by-default `mismatched_lifetime_syntaxes` lint.] (rust-lang/rust#138677) This lint detects when the same lifetime is referred to by different syntax categories between function arguments and return values, which can be confusing to read, especially in unsafe code. This lint supersedes the warn-by-default `elided_named_lifetimes` lint. - [Expand `unpredictable_function_pointer_comparisons` to also lint on function pointer comparisons in external macros] (rust-lang/rust#134536) - [Make the `dangerous_implicit_autorefs` lint deny-by-default] (rust-lang/rust#141661) - [Stabilize the avx512 target features] (rust-lang/rust#138940) - [Stabilize `kl` and `widekl` target features for x86] (rust-lang/rust#140766) - [Stabilize `sha512`, `sm3` and `sm4` target features for x86] (rust-lang/rust#140767) - [Stabilize LoongArch target features `f`, `d`, `frecipe`, `lasx`, `lbt`, `lsx`, and `lvz`] (rust-lang/rust#135015) - [Remove `i128` and `u128` from `improper_ctypes_definitions`] (rust-lang/rust#137306) - [Stabilize `repr128` (`#[repr(u128)]`, `#[repr(i128)]`)] (rust-lang/rust#138285) - [Allow `#![doc(test(attr(..)))]` everywhere] (rust-lang/rust#140560) - [Extend temporary lifetime extension to also go through tuple struct and tuple variant constructors] (rust-lang/rust#140593) Compiler -------- - [Default to non-leaf frame pointers on aarch64-linux] (rust-lang/rust#140832) - [Enable non-leaf frame pointers for Arm64EC Windows] (rust-lang/rust#140862) - [Set Apple frame pointers by architecture] (rust-lang/rust#141797) Platform Support ---------------- - [Add new Tier-3 targets `loongarch32-unknown-none` and `loongarch32-unknown-none-softfloat`] (rust-lang/rust#142053) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html Libraries --------- - [Specify the base path for `file!`] (rust-lang/rust#134442) - [Allow storing `format_args!()` in a variable] (rust-lang/rust#140748) - [Add `#[must_use]` to `[T; N]::map`] (rust-lang/rust#140957) - [Implement `DerefMut` for `Lazy{Cell,Lock}`] (rust-lang/rust#129334) - [Implement `Default` for `array::IntoIter`] (rust-lang/rust#141574) - [Implement `Clone` for `slice::ChunkBy`] (rust-lang/rust#138016) - [Implement `io::Seek` for `io::Take`] (rust-lang/rust#138023) Stabilized APIs --------------- - [`NonZero<char>`] (https://doc.rust-lang.org/stable/std/num/struct.NonZero.html) - Many intrinsics for x86, not enumerated here - [AVX512 intrinsics](rust-lang/rust#111137) - [`SHA512`, `SM3` and `SM4` intrinsics] (rust-lang/rust#126624) - [`File::lock`] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.lock) - [`File::lock_shared`] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.lock_shared) - [`File::try_lock`] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.try_lock) - [`File::try_lock_shared`] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.try_lock_shared) - [`File::unlock`] (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.unlock) - [`NonNull::from_ref`] (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.from_ref) - [`NonNull::from_mut`] (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.from_mut) - [`NonNull::without_provenance`] (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.without_provenance) - [`NonNull::with_exposed_provenance`] (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.with_exposed_provenance) - [`NonNull::expose_provenance`] (https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.expose_provenance) - [`OsString::leak`] (https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html#method.leak) - [`PathBuf::leak`] (https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#method.leak) - [`Result::flatten`] (https://doc.rust-lang.org/stable/std/result/enum.Result.html#method.flatten) - [`std::os::linux::net::TcpStreamExt::quickack`] (https://doc.rust-lang.org/stable/std/os/linux/net/trait.TcpStreamExt.html#tymethod.quickack) - [`std::os::linux::net::TcpStreamExt::set_quickack`] (https://doc.rust-lang.org/stable/std/os/linux/net/trait.TcpStreamExt.html#tymethod.set_quickack) These previously stable APIs are now stable in const contexts: - [`<[T; N]>::as_mut_slice`] (https://doc.rust-lang.org/stable/std/primitive.array.html#method.as_mut_slice) - [`<[u8]>::eq_ignore_ascii_case`] (https://doc.rust-lang.org/stable/std/primitive.slice.html#impl-%5Bu8%5D/method.eq_ignore_ascii_case) - [`str::eq_ignore_ascii_case`] (https://doc.rust-lang.org/stable/std/primitive.str.html#impl-str/method.eq_ignore_ascii_case) Cargo ----- - [`cargo fix` and `cargo clippy --fix` now default to the same Cargo target selection as other build commands.] (rust-lang/cargo#15192) Previously it would apply to all targets (like binaries, examples, tests, etc.). The `--edition` flag still applies to all targets. - [Stabilize doctest-xcompile.] (rust-lang/cargo#15462) Doctests are now tested when cross-compiling. Just like other tests, it will use the [`runner` setting] (https://doc.rust-lang.org/cargo/reference/config.html#targettriplerunner) to run the tests. If you need to disable tests for a target, you can use the [ignore doctest attribute] (https://doc.rust-lang.org/rustdoc/write-documentation/documentation-tests.html#ignoring-targets) to specify the targets to ignore. Rustdoc ----- - [On mobile, make the sidebar full width and linewrap] (rust-lang/rust#139831). This makes long section and item names much easier to deal with on mobile. Compatibility Notes ------------------- - [Make `missing_fragment_specifier` an unconditional error] (rust-lang/rust#128425) - [Enabling the `neon` target feature on `aarch64-unknown-none-softfloat` causes a warning] (rust-lang/rust#135160) because mixing code with and without that target feature is not properly supported by LLVM - [Sized Hierarchy: Part I](rust-lang/rust#137944) - Introduces a small breaking change affecting `?Sized` bounds on impls on recursive types which contain associated type projections. It is not expected to affect any existing published crates. Can be fixed by refactoring the involved types or opting into the `sized_hierarchy` unstable feature. See the [FCP report] (rust-lang/rust#137944 (comment)) for a code example. - The warn-by-default `elided_named_lifetimes` lint is [superseded by the warn-by-default `mismatched_lifetime_syntaxes` lint.] (rust-lang/rust#138677) - [Error on recursive opaque types earlier in the type checker] (rust-lang/rust#139419) - [Type inference side effects from requiring element types of array repeat expressions are `Copy` are now only available at the end of type checking] (rust-lang/rust#139635) - [The deprecated accidentally-stable `std::intrinsics::{copy,copy_nonoverlapping,write_bytes}` are now proper intrinsics] (rust-lang/rust#139916). There are no debug assertions guarding against UB, and they cannot be coerced to function pointers. - [Remove long-deprecated `std::intrinsics::drop_in_place`] (rust-lang/rust#140151) - [Make well-formedness predicates no longer coinductive] (rust-lang/rust#140208) - [Remove hack when checking impl method compatibility] (rust-lang/rust#140557) - [Remove unnecessary type inference due to built-in trait object impls] (rust-lang/rust#141352) - [Lint against "stdcall", "fastcall", and "cdecl" on non-x86-32 targets] (rust-lang/rust#141435) - [Future incompatibility warnings relating to the never type (`!`) are now reported in dependencies] (rust-lang/rust#141937) - [Ensure `std::ptr::copy_*` intrinsics also perform the static self-init checks] (rust-lang/rust#142575) Internal Changes ---------------- These changes do not affect any public interfaces of Rust, but they represent significant improvements to the performance or internals of rustc and related tools. - [Correctly un-remap compiler sources paths with the `rustc-dev` component] (rust-lang/rust#142377)

This MR contains the following updates: | Package | Update | Change | |---|---|---| | [rust](https://github.com/rust-lang/rust) | minor | `1.88.0` -> `1.89.0` | MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot). **Proposed changes to behavior should be submitted there as MRs.** --- ### Release Notes <details> <summary>rust-lang/rust (rust)</summary> ### [`v1.89.0`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1890-2025-08-07) [Compare Source](rust-lang/rust@1.88.0...1.89.0) \========================== <a id="1.89.0-Language"></a> ## Language - [Stabilize explicitly inferred const arguments (`feature(generic_arg_infer)`)](rust-lang/rust#141610) - [Add a warn-by-default `mismatched_lifetime_syntaxes` lint.](rust-lang/rust#138677) This lint detects when the same lifetime is referred to by different syntax categories between function arguments and return values, which can be confusing to read, especially in unsafe code. This lint supersedes the warn-by-default `elided_named_lifetimes` lint. - [Expand `unpredictable_function_pointer_comparisons` to also lint on function pointer comparisons in external macros](rust-lang/rust#134536) - [Make the `dangerous_implicit_autorefs` lint deny-by-default](rust-lang/rust#141661) - [Stabilize the avx512 target features](rust-lang/rust#138940) - [Stabilize `kl` and `widekl` target features for x86](rust-lang/rust#140766) - [Stabilize `sha512`, `sm3` and `sm4` target features for x86](rust-lang/rust#140767) - [Stabilize LoongArch target features `f`, `d`, `frecipe`, `lasx`, `lbt`, `lsx`, and `lvz`](rust-lang/rust#135015) - [Remove `i128` and `u128` from `improper_ctypes_definitions`](rust-lang/rust#137306) - [Stabilize `repr128` (`#[repr(u128)]`, `#[repr(i128)]`)](rust-lang/rust#138285) - [Allow `#![doc(test(attr(..)))]` everywhere](rust-lang/rust#140560) - [Extend temporary lifetime extension to also go through tuple struct and tuple variant constructors](rust-lang/rust#140593) - [`extern "C"` functions on the `wasm32-unknown-unknown` target now have a standards compliant ABI](https://blog.rust-lang.org/2025/04/04/c-abi-changes-for-wasm32-unknown-unknown/) <a id="1.89.0-Compiler"></a> ## Compiler - [Default to non-leaf frame pointers on aarch64-linux](rust-lang/rust#140832) - [Enable non-leaf frame pointers for Arm64EC Windows](rust-lang/rust#140862) - [Set Apple frame pointers by architecture](rust-lang/rust#141797) <a id="1.89.0-Platform-Support"></a> ## Platform Support - [Add new Tier-3 targets `loongarch32-unknown-none` and `loongarch32-unknown-none-softfloat`](rust-lang/rust#142053) - [`x86_64-apple-darwin` is in the process of being demoted to Tier 2 with host tools](rust-lang/rfcs#3841) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html <a id="1.89.0-Libraries"></a> ## Libraries - [Specify the base path for `file!`](rust-lang/rust#134442) - [Allow storing `format_args!()` in a variable](rust-lang/rust#140748) - [Add `#[must_use]` to `[T; N]::map`](rust-lang/rust#140957) - [Implement `DerefMut` for `Lazy{Cell,Lock}`](rust-lang/rust#129334) - [Implement `Default` for `array::IntoIter`](rust-lang/rust#141574) - [Implement `Clone` for `slice::ChunkBy`](rust-lang/rust#138016) - [Implement `io::Seek` for `io::Take`](rust-lang/rust#138023) <a id="1.89.0-Stabilized-APIs"></a> ## Stabilized APIs - [`NonZero<char>`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html) - Many intrinsics for x86, not enumerated here - [AVX512 intrinsics](rust-lang/rust#111137) - [`SHA512`, `SM3` and `SM4` intrinsics](rust-lang/rust#126624) - [`File::lock`](https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.lock) - [`File::lock_shared`](https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.lock_shared) - [`File::try_lock`](https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.try_lock) - [`File::try_lock_shared`](https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.try_lock_shared) - [`File::unlock`](https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.unlock) - [`NonNull::from_ref`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.from_ref) - [`NonNull::from_mut`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.from_mut) - [`NonNull::without_provenance`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.without_provenance) - [`NonNull::with_exposed_provenance`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.with_exposed_provenance) - [`NonNull::expose_provenance`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.expose_provenance) - [`OsString::leak`](https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html#method.leak) - [`PathBuf::leak`](https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#method.leak) - [`Result::flatten`](https://doc.rust-lang.org/stable/std/result/enum.Result.html#method.flatten) - [`std::os::linux::net::TcpStreamExt::quickack`](https://doc.rust-lang.org/stable/std/os/linux/net/trait.TcpStreamExt.html#tymethod.quickack) - [`std::os::linux::net::TcpStreamExt::set_quickack`](https://doc.rust-lang.org/stable/std/os/linux/net/trait.TcpStreamExt.html#tymethod.set_quickack) These previously stable APIs are now stable in const contexts: - [`<[T; N]>::as_mut_slice`](https://doc.rust-lang.org/stable/std/primitive.array.html#method.as_mut_slice) - [`<[u8]>::eq_ignore_ascii_case`](https://doc.rust-lang.org/stable/std/primitive.slice.html#impl-%5Bu8%5D/method.eq_ignore_ascii_case) - [`str::eq_ignore_ascii_case`](https://doc.rust-lang.org/stable/std/primitive.str.html#impl-str/method.eq_ignore_ascii_case) <a id="1.89.0-Cargo"></a> ## Cargo - [`cargo fix` and `cargo clippy --fix` now default to the same Cargo target selection as other build commands.](rust-lang/cargo#15192) Previously it would apply to all targets (like binaries, examples, tests, etc.). The `--edition` flag still applies to all targets. - [Stabilize doctest-xcompile.](rust-lang/cargo#15462) Doctests are now tested when cross-compiling. Just like other tests, it will use the [`runner` setting](https://doc.rust-lang.org/cargo/reference/config.html#targettriplerunner) to run the tests. If you need to disable tests for a target, you can use the [ignore doctest attribute](https://doc.rust-lang.org/rustdoc/write-documentation/documentation-tests.html#ignoring-targets) to specify the targets to ignore. <a id="1.89.0-Rustdoc"></a> ## Rustdoc - [On mobile, make the sidebar full width and linewrap](rust-lang/rust#139831). This makes long section and item names much easier to deal with on mobile. <a id="1.89.0-Compatibility-Notes"></a> ## Compatibility Notes - [Make `missing_fragment_specifier` an unconditional error](rust-lang/rust#128425) - [Enabling the `neon` target feature on `aarch64-unknown-none-softfloat` causes a warning](rust-lang/rust#135160) because mixing code with and without that target feature is not properly supported by LLVM - [Sized Hierarchy: Part I](rust-lang/rust#137944) - Introduces a small breaking change affecting `?Sized` bounds on impls on recursive types which contain associated type projections. It is not expected to affect any existing published crates. Can be fixed by refactoring the involved types or opting into the `sized_hierarchy` unstable feature. See the [FCP report](rust-lang/rust#137944 (comment)) for a code example. - The warn-by-default `elided_named_lifetimes` lint is [superseded by the warn-by-default `mismatched_lifetime_syntaxes` lint.](rust-lang/rust#138677) - [Error on recursive opaque types earlier in the type checker](rust-lang/rust#139419) - [Type inference side effects from requiring element types of array repeat expressions are `Copy` are now only available at the end of type checking](rust-lang/rust#139635) - [The deprecated accidentally-stable `std::intrinsics::{copy,copy_nonoverlapping,write_bytes}` are now proper intrinsics](rust-lang/rust#139916). There are no debug assertions guarding against UB, and they cannot be coerced to function pointers. - [Remove long-deprecated `std::intrinsics::drop_in_place`](rust-lang/rust#140151) - [Make well-formedness predicates no longer coinductive](rust-lang/rust#140208) - [Remove hack when checking impl method compatibility](rust-lang/rust#140557) - [Remove unnecessary type inference due to built-in trait object impls](rust-lang/rust#141352) - [Lint against "stdcall", "fastcall", and "cdecl" on non-x86-32 targets](rust-lang/rust#141435) - [Future incompatibility warnings relating to the never type (`!`) are now reported in dependencies](rust-lang/rust#141937) - [Ensure `std::ptr::copy_*` intrinsics also perform the static self-init checks](rust-lang/rust#142575) - [`extern "C"` functions on the `wasm32-unknown-unknown` target now have a standards compliant ABI](https://blog.rust-lang.org/2025/04/04/c-abi-changes-for-wasm32-unknown-unknown/) <a id="1.89.0-Internal-Changes"></a> ## Internal Changes These changes do not affect any public interfaces of Rust, but they represent significant improvements to the performance or internals of rustc and related tools. - [Correctly un-remap compiler sources paths with the `rustc-dev` component](rust-lang/rust#142377) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this MR, check this box --- This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).

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rustbot added T-lang Relevant to the language team and removed T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels May 7, 2025

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Stabilize sha512, sm3 and sm4 intrinsics and runtime detection rust-lang/stdarch#1796

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Tracking Issue for sha512_sm_x86 #126624

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sayantn force-pushed the stabilize-sha512 branch from e7b5f40 to 871162c Compare May 7, 2025 20:06

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rfcbot added proposed-final-comment-period Proposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off. disposition-merge This issue / PR is in PFCP or FCP with a disposition to merge it. labels May 15, 2025

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Tracking issue for release notes of #140767: Stabilize sha512, sm3 and sm4 for x86 #141822

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Stabilize sha512_sm_x86, and the sha512, sm3 and sm4 target f…

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sayantn force-pushed the stabilize-sha512 branch from cb1d70f to 632396e Compare June 7, 2025 17:58

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Rollup of 5 pull requests #142253

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bors merged commit 2f26913 into rust-lang:master Jun 9, 2025
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cuviper mentioned this pull request Jul 17, 2025

Draft release notes for 1.89.0 #144097

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tarcieri mentioned this pull request Jul 23, 2025

Use Intel SHA Extensions for SHA-512 RustCrypto/hashes#634

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sayantn deleted the stabilize-sha512 branch July 27, 2025 18:08

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