add x86-sse2 (32bit) ABI that requires SSE2 target feature by RalfJung · Pull Request #137037 · rust-lang/rust

RalfJung · 2025-02-14T18:49:03Z

This is the first commit of #135408:

The primary goal of this is to make SSE2 required for our i686 targets (at least for the ones that use Pentium 4 as their baseline), to ensure they cannot be affected by #114479. This has been MCPd in rust-lang/compiler-team#808, and is tracked in #133611.

We do this by defining a new ABI that these targets select, and making SSE2 required by the ABI (that's the first commit). That's kind of a hack, but it is the easiest way to make a target feature required via the target spec. In a follow-up change (#135408), we can actually make use of SSE2 for the ABI, but that is running into some infrastructure issues.

r? @workingjubilee

try-job: aarch64-apple
try-job: aarch64-gnu
try-job: aarch64-gnu-debug
try-job: test-various
try-job: x86_64-gnu-nopt
try-job: dist-i586-gnu-i586-i686-musl

rustbot · 2025-02-14T18:49:07Z

Could not assign reviewer from: workingjubilee.
User(s) workingjubilee are either the PR author, already assigned, or on vacation. Please use r? to specify someone else to assign.

rustbot · 2025-02-14T18:49:13Z

r? @jieyouxu

rustbot has assigned @jieyouxu.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

rustbot · 2025-02-14T18:49:15Z

The Miri subtree was changed

cc @rust-lang/miri

These commits modify compiler targets.
(See the Target Tier Policy.)

RalfJung · 2025-02-14T18:49:34Z

@bors try

add x86-sse2 (32bit) ABI that requires SSE2 target feature This is the first commit of rust-lang#135408: The primary goal of this is to make SSE2 required for our i686 targets (at least for the ones that use Pentium 4 as their baseline), to ensure they cannot be affected by rust-lang#114479. This has been MCPd in rust-lang/compiler-team#808, and is tracked in rust-lang#133611. We do this by defining a new ABI that these targets select, and making SSE2 required by the ABI (that's the first commit). That's kind of a hack, but it is the easiest way to make a target feature required via the target spec. In a follow-up change (rust-lang#135408), we can actually make use of SSE2 for the ABI, but that is running into some infrastructure issues. r? `@workingjubilee` try-job: aarch64-apple try-job: aarch64-gnu try-job: aarch64-gnu-debug try-job: test-various try-job: x86_64-gnu-nopt try-job: dist-i586-gnu-i586-i686-musl

bors · 2025-02-14T18:50:46Z

⌛ Trying commit 2eff215 with merge f7669ef...

workingjubilee · 2025-02-14T18:53:35Z

r=me when try job comes back okay

rust-log-analyzer · 2025-02-14T19:40:08Z

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

bors · 2025-02-14T19:40:46Z

💔 Test failed - checks-actions

RalfJung · 2025-02-14T19:43:36Z

That try build seems to have just aborted mid-way through?

@bors try

bors · 2025-02-14T19:44:47Z

⌛ Trying commit 2eff215 with merge 6abddac...

add x86-sse2 (32bit) ABI that requires SSE2 target feature This is the first commit of rust-lang#135408: The primary goal of this is to make SSE2 required for our i686 targets (at least for the ones that use Pentium 4 as their baseline), to ensure they cannot be affected by rust-lang#114479. This has been MCPd in rust-lang/compiler-team#808, and is tracked in rust-lang#133611. We do this by defining a new ABI that these targets select, and making SSE2 required by the ABI (that's the first commit). That's kind of a hack, but it is the easiest way to make a target feature required via the target spec. In a follow-up change (rust-lang#135408), we can actually make use of SSE2 for the ABI, but that is running into some infrastructure issues. r? `@workingjubilee` try-job: aarch64-apple try-job: aarch64-gnu try-job: aarch64-gnu-debug try-job: test-various try-job: x86_64-gnu-nopt try-job: dist-i586-gnu-i586-i686-musl

rust-log-analyzer · 2025-02-14T19:45:37Z

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

/dev/sdb1       147G  4.1G  136G   3% /mnt
tmpfs           1.6G  4.0K  1.6G   1% /run/user/1001
================================================================================

Failed to stop mysql.service: Unit mysql.service not loaded.
##[error]Process completed with exit code 5.

bors · 2025-02-14T19:46:07Z

💔 Test failed - checks-actions

workingjubilee · 2025-02-14T19:47:34Z

????

RalfJung · 2025-02-14T19:48:44Z

@bors try

bors · 2025-02-14T19:49:53Z

⌛ Trying commit 2eff215 with merge 086622c...

add x86-sse2 (32bit) ABI that requires SSE2 target feature This is the first commit of rust-lang#135408: The primary goal of this is to make SSE2 required for our i686 targets (at least for the ones that use Pentium 4 as their baseline), to ensure they cannot be affected by rust-lang#114479. This has been MCPd in rust-lang/compiler-team#808, and is tracked in rust-lang#133611. We do this by defining a new ABI that these targets select, and making SSE2 required by the ABI (that's the first commit). That's kind of a hack, but it is the easiest way to make a target feature required via the target spec. In a follow-up change (rust-lang#135408), we can actually make use of SSE2 for the ABI, but that is running into some infrastructure issues. r? `@workingjubilee` try-job: aarch64-apple try-job: aarch64-gnu try-job: aarch64-gnu-debug try-job: test-various try-job: x86_64-gnu-nopt try-job: dist-i586-gnu-i586-i686-musl

rust-log-analyzer · 2025-02-14T19:50:48Z

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

/dev/sda15       98M  6.3M   92M   7% /boot/efi
tmpfs           1.6G  4.0K  1.6G   1% /run/user/1001
================================================================================

Failed to stop mysql.service: Unit mysql.service not loaded.
##[error]Process completed with exit code 5.

bors · 2025-02-14T19:51:15Z

💔 Test failed - checks-actions

bors · 2025-02-14T20:15:53Z

💔 Test failed - checks-actions

saethlin · 2025-02-14T20:21:32Z

doom

rust-log-analyzer · 2025-02-14T20:41:26Z

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

/dev/sda15       98M  6.3M   92M   7% /boot/efi
tmpfs           1.6G  4.0K  1.6G   1% /run/user/1001
================================================================================

Failed to stop mysql.service: Unit mysql.service not loaded.
##[error]Process completed with exit code 5.

workingjubilee · 2025-02-14T20:55:42Z

correction:
r=me when the sky stops falling

workingjubilee · 2025-02-14T22:02:14Z

Going to approve it now even though it can't go in yet.

workingjubilee · 2025-02-14T22:02:34Z

@bors r+

bors · 2025-02-14T22:02:36Z

💡 This pull request was already approved, no need to approve it again.

This pull request previously failed. You should add more commits to fix the bug, or use retry to trigger a build again.
There's another pull request that is currently being tested, blocking this pull request: Implement f{16,32,64,128}::{erf,erfc} (#![feature(float_erf)]) #136324

bors · 2025-02-14T22:02:37Z

📌 Commit 2eff215 has been approved by workingjubilee

It is now in the queue for this repository.

bors · 2025-02-14T22:02:38Z

🌲 The tree is currently closed for pull requests below priority 100. This pull request will be tested once the tree is reopened.

…kingjubilee Rollup of 10 pull requests Successful merges: - rust-lang#133312 (triagebot: automatically add more rustdoc related labels) - rust-lang#134016 (Stabilize `const_is_char_boundary` and `const_str_split_at`.) - rust-lang#136971 (Add a new check-pass UI test for returning `impl Fn(T) -> impl Trait`) - rust-lang#136983 (Prepare standard library for Rust 2024 migration) - rust-lang#137002 (Fix early lint check desc in query) - rust-lang#137006 (borrowck diagnostics cleanup: remove an unused and a barely-used field) - rust-lang#137032 (Decode metadata buffer in one go) - rust-lang#137035 (Normalize closure instance before eagerly monomorphizing it) - rust-lang#137037 (add x86-sse2 (32bit) ABI that requires SSE2 target feature) - rust-lang#137038 (llvm: Tolerate captures in tests) r? `@ghost` `@rustbot` modify labels: rollup

Rollup merge of rust-lang#137037 - RalfJung:x86-sse2-abi, r=workingjubilee add x86-sse2 (32bit) ABI that requires SSE2 target feature This is the first commit of rust-lang#135408: The primary goal of this is to make SSE2 required for our i686 targets (at least for the ones that use Pentium 4 as their baseline), to ensure they cannot be affected by rust-lang#114479. This has been MCPd in rust-lang/compiler-team#808, and is tracked in rust-lang#133611. We do this by defining a new ABI that these targets select, and making SSE2 required by the ABI (that's the first commit). That's kind of a hack, but it is the easiest way to make a target feature required via the target spec. In a follow-up change (rust-lang#135408), we can actually make use of SSE2 for the ABI, but that is running into some infrastructure issues. r? `@workingjubilee` try-job: aarch64-apple try-job: aarch64-gnu try-job: aarch64-gnu-debug try-job: test-various try-job: x86_64-gnu-nopt try-job: dist-i586-gnu-i586-i686-musl

x86: use SSE2 to pass float and SIMD types This builds on the new X86Sse2 ABI landed in rust-lang#137037 to actually make it a separate ABI from the default x86 ABI, and use SSE2 registers. Specifically, we use it in two ways: to return `f64` values in a register rather than by-ptr, and to pass vectors of size up to 128bit in a register (or, well, whatever LLVM does when passing `<4 x float>` by-val, I don't actually know if this ends up in a register). Cc `@workingjubilee` Fixes rust-lang#133611 try-job: aarch64-apple try-job: aarch64-gnu try-job: aarch64-gnu-debug try-job: test-various try-job: x86_64-gnu-nopt try-job: dist-i586-gnu-i586-i686-musl try-job: x86_64-msvc-1

x86: use SSE2 to pass float and SIMD types This builds on the new X86Sse2 ABI landed in rust-lang/rust#137037 to actually make it a separate ABI from the default x86 ABI, and use SSE2 registers. Specifically, we use it in two ways: to return `f64` values in a register rather than by-ptr, and to pass vectors of size up to 128bit in a register (or, well, whatever LLVM does when passing `<4 x float>` by-val, I don't actually know if this ends up in a register). Cc `@workingjubilee` Fixes #133611 try-job: aarch64-apple try-job: aarch64-gnu try-job: aarch64-gnu-debug try-job: test-various try-job: x86_64-gnu-nopt try-job: dist-i586-gnu-i586-i686-musl try-job: x86_64-msvc-1

Upstream changes relative to 1.85.1: Version 1.86.0 (2025-04-03) ========================== Language -------- - [Stabilize upcasting trait objects to supertraits.] (rust-lang/rust#134367) - [Allow safe functions to be marked with the `#[target_feature]` attribute.] (rust-lang/rust#134090) - [The `missing_abi` lint now warns-by-default.] (rust-lang/rust#132397) - Rust now lints about double negations, to catch cases that might have intended to be a prefix decrement operator (`--x`) as written in other languages. This was previously a clippy lint, `clippy::double_neg`, and is [now available directly in Rust as `double_negations`.] (rust-lang/rust#126604) - [More pointers are now detected as definitely not-null based on their alignment in const eval.] (rust-lang/rust#133700) - [Empty `repr()` attribute applied to invalid items are now correctly rejected.] (rust-lang/rust#133925) - [Inner attributes `#![test]` and `#![rustfmt::skip]` are no longer accepted in more places than intended.] (rust-lang/rust#134276) Compiler -------- - [Debug-assert that raw pointers are non-null on access.] (rust-lang/rust#134424) - [Change `-O` to mean `-C opt-level=3` instead of `-C opt-level=2` to match Cargo's defaults.] (rust-lang/rust#135439) - [Fix emission of `overflowing_literals` under certain macro environments.] (rust-lang/rust#136393) Platform Support ---------------- - [Replace `i686-unknown-redox` target with `i586-unknown-redox`.] (rust-lang/rust#136698) - [Increase baseline CPU of `i686-unknown-hurd-gnu` to Pentium 4.] (rust-lang/rust#136700) - New tier 3 targets: - [`{aarch64-unknown,x86_64-pc}-nto-qnx710_iosock`] (rust-lang/rust#133631). For supporting Neutrino QNX 7.1 with `io-socket` network stack. - [`{aarch64-unknown,x86_64-pc}-nto-qnx800`] (rust-lang/rust#133631). For supporting Neutrino QNX 8.0 (`no_std`-only). - [`{x86_64,i686}-win7-windows-gnu`] (rust-lang/rust#134609). Intended for backwards compatibility with Windows 7. `{x86_64,i686}-win7-windows-msvc` are the Windows MSVC counterparts that already exist as Tier 3 targets. - [`amdgcn-amd-amdhsa`](rust-lang/rust#134740). - [`x86_64-pc-cygwin`](rust-lang/rust#134999). - [`{mips,mipsel}-mti-none-elf`] (rust-lang/rust#135074). Initial bare-metal support. - [`m68k-unknown-none-elf`](rust-lang/rust#135085). - [`armv7a-nuttx-{eabi,eabihf}`, `aarch64-unknown-nuttx`, and `thumbv7a-nuttx-{eabi,eabihf}`] (rust-lang/rust#135757). Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. Libraries --------- - The type of `FromBytesWithNulError` in `CStr::from_bytes_with_nul(bytes: &[u8]) -> Result<&Self, FromBytesWithNulError>` was [changed from an opaque struct to an enum] (rust-lang/rust#134143), allowing users to examine why the conversion failed. - [Remove `RustcDecodable` and `RustcEncodable`.] (rust-lang/rust#134272) - [Deprecate libtest's `--logfile` option.] (rust-lang/rust#134283) - [On recent versions of Windows, `std::fs::remove_file` will now remove read-only files.] (rust-lang/rust#134679) Stabilized APIs --------------- - [`{float}::next_down`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.next_down) - [`{float}::next_up`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.next_up) - [`<[_]>::get_disjoint_mut`] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.get_disjoint_mut) - [`<[_]>::get_disjoint_unchecked_mut`] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.get_disjoint_unchecked_mut) - [`slice::GetDisjointMutError`] (https://doc.rust-lang.org/stable/std/slice/enum.GetDisjointMutError.html) - [`HashMap::get_disjoint_mut`] (https://doc.rust-lang.org/std/collections/hash_map/struct.HashMap.html#method.get_disjoint_mut) - [`HashMap::get_disjoint_unchecked_mut`] (https://doc.rust-lang.org/std/collections/hash_map/struct.HashMap.html#method.get_disjoint_unchecked_mut) - [`NonZero::count_ones`] (https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.count_ones) - [`Vec::pop_if`] (https://doc.rust-lang.org/std/vec/struct.Vec.html#method.pop_if) - [`sync::Once::wait`] (https://doc.rust-lang.org/stable/std/sync/struct.Once.html#method.wait) - [`sync::Once::wait_force`] (https://doc.rust-lang.org/stable/std/sync/struct.Once.html#method.wait_force) - [`sync::OnceLock::wait`] (https://doc.rust-lang.org/stable/std/sync/struct.OnceLock.html#method.wait) These APIs are now stable in const contexts: - [`hint::black_box`] (https://doc.rust-lang.org/stable/std/hint/fn.black_box.html) - [`io::Cursor::get_mut`] (https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.get_mut) - [`io::Cursor::set_position`] (https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.set_position) - [`str::is_char_boundary`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.is_char_boundary) - [`str::split_at`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at) - [`str::split_at_checked`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_checked) - [`str::split_at_mut`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_mut) - [`str::split_at_mut_checked`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_mut_checked) Cargo ----- - [When merging, replace rather than combine configuration keys that refer to a program path and its arguments.] (rust-lang/cargo#15066) - [Error if both `--package` and `--workspace` are passed but the requested package is missing.] (rust-lang/cargo#15071) This was previously silently ignored, which was considered a bug since missing packages should be reported. - [Deprecate the token argument in `cargo login` to avoid shell history leaks.] (rust-lang/cargo#15057) - [Simplify the implementation of `SourceID` comparisons.] (rust-lang/cargo#14980) This may potentially change behavior if the canonicalized URL compares differently in alternative registries. Rustdoc ----- - [Add a sans-serif font setting.] (rust-lang/rust#133636) Compatibility Notes ------------------- - [The `wasm_c_abi` future compatibility warning is now a hard error.] (rust-lang/rust#133951) Users of `wasm-bindgen` should upgrade to at least version 0.2.89, otherwise compilation will fail. - [Remove long-deprecated no-op attributes `#![no_start]` and `#![crate_id]`.] (rust-lang/rust#134300) - [The future incompatibility lint `cenum_impl_drop_cast` has been made into a hard error.] (rust-lang/rust#135964) This means it is now an error to cast a field-less enum to an integer if the enum implements `Drop`. - [SSE2 is now required for "i686" 32-bit x86 hard-float targets; disabling it causes a warning that will become a hard error eventually.] (rust-lang/rust#137037) To compile for pre-SSE2 32-bit x86, use a "i586" target instead. 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. - [Build the rustc on AArch64 Linux with ThinLTO + PGO.] (rust-lang/rust#133807) The ARM 64-bit compiler (AArch64) on Linux is now optimized with ThinLTO and PGO, similar to the optimizations we have already performed for the x86-64 compiler on Linux. This should make it up to 30% faster.

This MR contains the following updates: | Package | Update | Change | |---|---|---| | [rust](https://github.com/rust-lang/rust) | minor | `1.85.1` -> `1.86.0` | 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> ### [`v1.86.0`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1860-2025-04-03) [Compare Source](rust-lang/rust@1.85.1...1.86.0) \========================== <a id="1.86.0-Language"></a> ## Language - [Stabilize upcasting trait objects to supertraits.](rust-lang/rust#134367) - [Allow safe functions to be marked with the `#[target_feature]` attribute.](rust-lang/rust#134090) - [The `missing_abi` lint now warns-by-default.](rust-lang/rust#132397) - Rust now lints about double negations, to catch cases that might have intended to be a prefix decrement operator (`--x`) as written in other languages. This was previously a clippy lint, `clippy::double_neg`, and is [now available directly in Rust as `double_negations`.](rust-lang/rust#126604) - [More pointers are now detected as definitely not-null based on their alignment in const eval.](rust-lang/rust#133700) - [Empty `repr()` attribute applied to invalid items are now correctly rejected.](rust-lang/rust#133925) - [Inner attributes `#![test]` and `#![rustfmt::skip]` are no longer accepted in more places than intended.](rust-lang/rust#134276) <a id="1.86.0-Compiler"></a> ## Compiler - [Debug-assert that raw pointers are non-null on access.](rust-lang/rust#134424) - [Change `-O` to mean `-C opt-level=3` instead of `-C opt-level=2` to match Cargo's defaults.](rust-lang/rust#135439) - [Fix emission of `overflowing_literals` under certain macro environments.](rust-lang/rust#136393) <a id="1.86.0-Platform-Support"></a> ## Platform Support - [Replace `i686-unknown-redox` target with `i586-unknown-redox`.](rust-lang/rust#136698) - [Increase baseline CPU of `i686-unknown-hurd-gnu` to Pentium 4.](rust-lang/rust#136700) - New tier 3 targets: - [`{aarch64-unknown,x86_64-pc}-nto-qnx710_iosock`](rust-lang/rust#133631). For supporting Neutrino QNX 7.1 with `io-socket` network stack. - [`{aarch64-unknown,x86_64-pc}-nto-qnx800`](rust-lang/rust#133631). For supporting Neutrino QNX 8.0 (`no_std`-only). - [`{x86_64,i686}-win7-windows-gnu`](rust-lang/rust#134609). Intended for backwards compatibility with Windows 7. `{x86_64,i686}-win7-windows-msvc` are the Windows MSVC counterparts that already exist as Tier 3 targets. - [`amdgcn-amd-amdhsa`](rust-lang/rust#134740). - [`x86_64-pc-cygwin`](rust-lang/rust#134999). - [`{mips,mipsel}-mti-none-elf`](rust-lang/rust#135074). Initial bare-metal support. - [`m68k-unknown-none-elf`](rust-lang/rust#135085). - [`armv7a-nuttx-{eabi,eabihf}`, `aarch64-unknown-nuttx`, and `thumbv7a-nuttx-{eabi,eabihf}`](rust-lang/rust#135757). Refer to Rust's \[platform support page]\[platform-support-doc] for more information on Rust's tiered platform support. <a id="1.86.0-Libraries"></a> ## Libraries - The type of `FromBytesWithNulError` in `CStr::from_bytes_with_nul(bytes: &[u8]) -> Result<&Self, FromBytesWithNulError>` was [changed from an opaque struct to an enum](rust-lang/rust#134143), allowing users to examine why the conversion failed. - [Remove `RustcDecodable` and `RustcEncodable`.](rust-lang/rust#134272) - [Deprecate libtest's `--logfile` option.](rust-lang/rust#134283) - [On recent versions of Windows, `std::fs::remove_file` will now remove read-only files.](rust-lang/rust#134679) <a id="1.86.0-Stabilized-APIs"></a> ## Stabilized APIs - [`{float}::next_down`](https://doc.rust-lang.org/stable/std/primitive.f64.html#method.next_down) - [`{float}::next_up`](https://doc.rust-lang.org/stable/std/primitive.f64.html#method.next_up) - [`<[_]>::get_disjoint_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.get_disjoint_mut) - [`<[_]>::get_disjoint_unchecked_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.get_disjoint_unchecked_mut) - [`slice::GetDisjointMutError`](https://doc.rust-lang.org/stable/std/slice/enum.GetDisjointMutError.html) - [`HashMap::get_disjoint_mut`](https://doc.rust-lang.org/std/collections/hash_map/struct.HashMap.html#method.get_disjoint_mut) - [`HashMap::get_disjoint_unchecked_mut`](https://doc.rust-lang.org/std/collections/hash_map/struct.HashMap.html#method.get_disjoint_unchecked_mut) - [`NonZero::count_ones`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.count_ones) - [`Vec::pop_if`](https://doc.rust-lang.org/std/vec/struct.Vec.html#method.pop_if) - [`sync::Once::wait`](https://doc.rust-lang.org/stable/std/sync/struct.Once.html#method.wait) - [`sync::Once::wait_force`](https://doc.rust-lang.org/stable/std/sync/struct.Once.html#method.wait_force) - [`sync::OnceLock::wait`](https://doc.rust-lang.org/stable/std/sync/struct.OnceLock.html#method.wait) These APIs are now stable in const contexts: - [`hint::black_box`](https://doc.rust-lang.org/stable/std/hint/fn.black_box.html) - [`io::Cursor::get_mut`](https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.get_mut) - [`io::Cursor::set_position`](https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.set_position) - [`str::is_char_boundary`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.is_char_boundary) - [`str::split_at`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at) - [`str::split_at_checked`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_checked) - [`str::split_at_mut`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_mut) - [`str::split_at_mut_checked`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_mut_checked) <a id="1.86.0-Cargo"></a> ## Cargo - [When merging, replace rather than combine configuration keys that refer to a program path and its arguments.](rust-lang/cargo#15066) - [Error if both `--package` and `--workspace` are passed but the requested package is missing.](rust-lang/cargo#15071) This was previously silently ignored, which was considered a bug since missing packages should be reported. - [Deprecate the token argument in `cargo login` to avoid shell history leaks.](rust-lang/cargo#15057) - [Simplify the implementation of `SourceID` comparisons.](rust-lang/cargo#14980) This may potentially change behavior if the canonicalized URL compares differently in alternative registries. <a id="1.86.0-Rustdoc"></a> ## Rustdoc - [Add a sans-serif font setting.](rust-lang/rust#133636) <a id="1.86.0-Compatibility-Notes"></a> ## Compatibility Notes - [The `wasm_c_abi` future compatibility warning is now a hard error.](rust-lang/rust#133951) Users of `wasm-bindgen` should upgrade to at least version 0.2.89, otherwise compilation will fail. - [Remove long-deprecated no-op attributes `#![no_start]` and `#![crate_id]`.](rust-lang/rust#134300) - [The future incompatibility lint `cenum_impl_drop_cast` has been made into a hard error.](rust-lang/rust#135964) This means it is now an error to cast a field-less enum to an integer if the enum implements `Drop`. - [SSE2 is now required for "i686" 32-bit x86 hard-float targets; disabling it causes a warning that will become a hard error eventually.](rust-lang/rust#137037) To compile for pre-SSE2 32-bit x86, use a "i586" target instead. <a id="1.86.0-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. - [Build the rustc on AArch64 Linux with ThinLTO + PGO.](rust-lang/rust#133807) The ARM 64-bit compiler (AArch64) on Linux is now optimized with ThinLTO and PGO, similar to the optimizations we have already performed for the x86-64 compiler on Linux. This should make it up to 30% faster. </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).

Pkgsrc changes: * Drop support for building now old 1.76.0 rust natively on 32-bit NetBSD arm ports, pushing those to use the rust-bin variant instead. * Use of newer GCC on NetBSD/powerpc turned out to not be required, given that your kernel and user-land is new enough. >= 10.0 release? * Checksum updates. Upstream changes: Version 1.86.0 (2025-04-03) ========================== Language -------- - [Stabilize upcasting trait objects to supertraits.] (rust-lang/rust#134367) - [Allow safe functions to be marked with the `#[target_feature]` attribute.] (rust-lang/rust#134090) - [The `missing_abi` lint now warns-by-default.] (rust-lang/rust#132397) - Rust now lints about double negations, to catch cases that might have intended to be a prefix decrement operator (`--x`) as written in other languages. This was previously a clippy lint, `clippy::double_neg`, and is [now available directly in Rust as `double_negations`.] (rust-lang/rust#126604) - [More pointers are now detected as definitely not-null based on their alignment in const eval.] (rust-lang/rust#133700) - [Empty `repr()` attribute applied to invalid items are now correctly rejected.] (rust-lang/rust#133925) - [Inner attributes `#![test]` and `#![rustfmt::skip]` are no longer accepted in more places than intended.] (rust-lang/rust#134276) Compiler -------- - [Debug-assert that raw pointers are non-null on access.] (rust-lang/rust#134424) - [Change `-O` to mean `-C opt-level=3` instead of `-C opt-level=2` to match Cargo's defaults.] (rust-lang/rust#135439) - [Fix emission of `overflowing_literals` under certain macro environments.] (rust-lang/rust#136393) Platform Support ---------------- - [Replace `i686-unknown-redox` target with `i586-unknown-redox`.] (rust-lang/rust#136698) - [Increase baseline CPU of `i686-unknown-hurd-gnu` to Pentium 4.] (rust-lang/rust#136700) - New tier 3 targets: - [`{aarch64-unknown,x86_64-pc}-nto-qnx710_iosock`] (rust-lang/rust#133631). For supporting Neutrino QNX 7.1 with `io-socket` network stack. - [`{aarch64-unknown,x86_64-pc}-nto-qnx800`] (rust-lang/rust#133631). For supporting Neutrino QNX 8.0 (`no_std`-only). - [`{x86_64,i686}-win7-windows-gnu`] (rust-lang/rust#134609). Intended for backwards compatibility with Windows 7. `{x86_64,i686}-win7-windows-msvc` are the Windows MSVC counterparts that already exist as Tier 3 targets. - [`amdgcn-amd-amdhsa`](rust-lang/rust#134740). - [`x86_64-pc-cygwin`](rust-lang/rust#134999). - [`{mips,mipsel}-mti-none-elf`] (rust-lang/rust#135074). Initial bare-metal support. - [`m68k-unknown-none-elf`](rust-lang/rust#135085). - [`armv7a-nuttx-{eabi,eabihf}`, `aarch64-unknown-nuttx`, and `thumbv7a-nuttx-{eabi,eabihf}`] (rust-lang/rust#135757). Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. Libraries --------- - The type of `FromBytesWithNulError` in `CStr::from_bytes_with_nul(bytes: &[u8]) -> Result<&Self, FromBytesWithNulError>` was [changed from an opaque struct to an enum] (rust-lang/rust#134143), allowing users to examine why the conversion failed. - [Remove `RustcDecodable` and `RustcEncodable`.] (rust-lang/rust#134272) - [Deprecate libtest's `--logfile` option.] (rust-lang/rust#134283) - [On recent versions of Windows, `std::fs::remove_file` will now remove read-only files.] (rust-lang/rust#134679) Stabilized APIs --------------- - [`{float}::next_down`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.next_down) - [`{float}::next_up`] (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.next_up) - [`<[_]>::get_disjoint_mut`] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.get_disjoint_mut) - [`<[_]>::get_disjoint_unchecked_mut`] (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.get_disjoint_unchecked_mut) - [`slice::GetDisjointMutError`] (https://doc.rust-lang.org/stable/std/slice/enum.GetDisjointMutError.html) - [`HashMap::get_disjoint_mut`] (https://doc.rust-lang.org/std/collections/hash_map/struct.HashMap.html#method.get_disjoint_mut) - [`HashMap::get_disjoint_unchecked_mut`] (https://doc.rust-lang.org/std/collections/hash_map/struct.HashMap.html#method.get_disjoint_unchecked_mut) - [`NonZero::count_ones`] (https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.count_ones) - [`Vec::pop_if`] (https://doc.rust-lang.org/std/vec/struct.Vec.html#method.pop_if) - [`sync::Once::wait`] (https://doc.rust-lang.org/stable/std/sync/struct.Once.html#method.wait) - [`sync::Once::wait_force`] (https://doc.rust-lang.org/stable/std/sync/struct.Once.html#method.wait_force) - [`sync::OnceLock::wait`] (https://doc.rust-lang.org/stable/std/sync/struct.OnceLock.html#method.wait) These APIs are now stable in const contexts: - [`hint::black_box`] (https://doc.rust-lang.org/stable/std/hint/fn.black_box.html) - [`io::Cursor::get_mut`] (https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.get_mut) - [`io::Cursor::set_position`] (https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.set_position) - [`str::is_char_boundary`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.is_char_boundary) - [`str::split_at`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at) - [`str::split_at_checked`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_checked) - [`str::split_at_mut`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_mut) - [`str::split_at_mut_checked`] (https://doc.rust-lang.org/stable/std/primitive.str.html#method.split_at_mut_checked) Cargo ----- - [When merging, replace rather than combine configuration keys that refer to a program path and its arguments.] (rust-lang/cargo#15066) - [Error if both `--package` and `--workspace` are passed but the requested package is missing.] (rust-lang/cargo#15071) This was previously silently ignored, which was considered a bug since missing packages should be reported. - [Deprecate the token argument in `cargo login` to avoid shell history leaks.] (rust-lang/cargo#15057) - [Simplify the implementation of `SourceID` comparisons.] (rust-lang/cargo#14980) This may potentially change behavior if the canonicalized URL compares differently in alternative registries. Rustdoc ----- - [Add a sans-serif font setting.] (rust-lang/rust#133636) Compatibility Notes ------------------- - [The `wasm_c_abi` future compatibility warning is now a hard error.] (rust-lang/rust#133951) Users of `wasm-bindgen` should upgrade to at least version 0.2.89, otherwise compilation will fail. - [Remove long-deprecated no-op attributes `#![no_start]` and `#![crate_id]`.] (rust-lang/rust#134300) - [The future incompatibility lint `cenum_impl_drop_cast` has been made into a hard error.] (rust-lang/rust#135964) This means it is now an error to cast a field-less enum to an integer if the enum implements `Drop`. - [SSE2 is now required for "i686" 32-bit x86 hard-float targets; disabling it causes a warning that will become a hard error eventually.] (rust-lang/rust#137037) To compile for pre-SSE2 32-bit x86, use a "i586" target instead. 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. - [Build the rustc on AArch64 Linux with ThinLTO + PGO.] (rust-lang/rust#133807) The ARM 64-bit compiler (AArch64) on Linux is now optimized with ThinLTO and PGO, similar to the optimizations we have already performed for the x86-64 compiler on Linux. This should make it up to 30% faster.

add x86-sse2 (32bit) ABI that requires SSE2 target feature

2eff215

rustbot assigned jieyouxu Feb 14, 2025

rustbot added O-apple Operating system: Apple / Darwin (macOS, iOS, tvOS, visionOS, watchOS) S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Feb 14, 2025

jieyouxu assigned workingjubilee and unassigned jieyouxu Feb 14, 2025

workingjubilee mentioned this pull request Feb 14, 2025

x86: use SSE2 to pass float and SIMD types #135408

Merged

bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 14, 2025

bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Feb 14, 2025

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 14, 2025

workingjubilee mentioned this pull request Feb 14, 2025

Rollup of 10 pull requests #137046

Merged

RalfJung added the relnotes Marks issues that should be documented in the release notes of the next release. label Feb 14, 2025

rustbot mentioned this pull request Feb 14, 2025

Tracking issue for release notes of #137037: add x86-sse2 (32bit) ABI that requires SSE2 target feature #137047

Closed

3 tasks

bors merged commit db5238a into rust-lang:master Feb 15, 2025
6 of 7 checks passed

rustbot added this to the 1.86.0 milestone Feb 15, 2025

jieyouxu mentioned this pull request Feb 15, 2025

compiletest: add {ignore,only}-rustc_abi-x86-sse2 directives #137074

Merged

RalfJung deleted the x86-sse2-abi branch February 15, 2025 18:42

cuviper mentioned this pull request Mar 21, 2025

Draft release notes for 1.86.0 #138795

Closed

Uh oh!

Conversation

RalfJung commented Feb 14, 2025

Uh oh!

rustbot commented Feb 14, 2025

Uh oh!

rustbot commented Feb 14, 2025

Uh oh!

rustbot commented Feb 14, 2025

Uh oh!

RalfJung commented Feb 14, 2025

Uh oh!

bors commented Feb 14, 2025

Uh oh!

workingjubilee commented Feb 14, 2025

Uh oh!

rust-log-analyzer commented Feb 14, 2025

Uh oh!

bors commented Feb 14, 2025

Uh oh!

RalfJung commented Feb 14, 2025

Uh oh!

bors commented Feb 14, 2025

Uh oh!

rust-log-analyzer commented Feb 14, 2025

Uh oh!

bors commented Feb 14, 2025

Uh oh!

workingjubilee commented Feb 14, 2025

Uh oh!

RalfJung commented Feb 14, 2025

Uh oh!

bors commented Feb 14, 2025

Uh oh!

rust-log-analyzer commented Feb 14, 2025

Uh oh!

bors commented Feb 14, 2025

Uh oh!

bors commented Feb 14, 2025

Uh oh!

saethlin commented Feb 14, 2025 • edited by workingjubilee Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

rust-log-analyzer commented Feb 14, 2025

Uh oh!

workingjubilee commented Feb 14, 2025

Uh oh!

workingjubilee commented Feb 14, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

workingjubilee commented Feb 14, 2025

Uh oh!

bors commented Feb 14, 2025

Uh oh!

bors commented Feb 14, 2025

Uh oh!

bors commented Feb 14, 2025

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

7 participants

saethlin commented Feb 14, 2025 •

edited by workingjubilee

Loading

workingjubilee commented Feb 14, 2025 •

edited

Loading