Merge ref 'b56aaec52bc0' from rust-lang/rust

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: b56aaec52bc0fa35591a872fb4aac81f606e265c
Filtered ref: 12f5e3255df658296af9fc953d8c1ab79ba91ea3

This merge was created using https://github.com/rust-lang/josh-sync.

Author: The Miri Cronjob Bot

.github/workflows/main.yml

@@ -255,22 +255,34 @@ jobs:
       env:
         TARGET: ${{ matrix.target.tuple }}
 
-  build-std-detect:
+  # Check that the generated files agree with the checked-in versions.
+  check-stdarch-gen:
     needs: [style]
-    name: Build std_detect
+    name: Check stdarch-gen-{arm, loongarch} output
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
     - name: Install Rust
-      run: rustup update nightly && rustup default nightly
-    - run: ./ci/build-std-detect.sh
+      run: rustup update nightly && rustup default nightly && rustup component add rustfmt
+    - name: Check arm spec
+      run: |
+        cargo run --bin=stdarch-gen-arm --release -- crates/stdarch-gen-arm/spec
+        git diff --exit-code
+    - name: Check lsx.spec
+      run: |
+        cargo run --bin=stdarch-gen-loongarch --release -- crates/stdarch-gen-loongarch/lsx.spec
+        git diff --exit-code
+    - name: Check lasx.spec
+      run: |
+        cargo run --bin=stdarch-gen-loongarch --release -- crates/stdarch-gen-loongarch/lasx.spec
+        git diff --exit-code
 
   conclusion:
     needs:
       - docs
       - verify
       - test
-      - build-std-detect
+      - check-stdarch-gen
     runs-on: ubuntu-latest
     # We need to ensure this job does *not* get skipped if its dependencies fail,
     # because a skipped job is considered a success by GitHub. So we have to

.github/workflows/rustc-pull.yml

@@ -0,0 +1,22 @@
+# Perform a subtree sync (pull) using the josh-sync tool once every few days (or on demand).
+name: rustc-pull
+
+on:
+  workflow_dispatch:
+  schedule:
+    # Run at 04:00 UTC every Monday and Thursday
+    - cron: '0 4 * * 1,4'
+
+jobs:
+  pull:
+    if: github.repository == 'rust-lang/stdarch'
+    uses: rust-lang/josh-sync/.github/workflows/rustc-pull.yml@main
+    with:
+      # https://rust-lang.zulipchat.com/#narrow/channel/208962-t-libs.2Fstdarch/topic/Subtree.20sync.20automation/with/528461782
+      zulip-stream-id: 208962
+      zulip-bot-email:  "stdarch-ci-bot@rust-lang.zulipchat.com"
+      pr-base-branch: master
+      branch-name: rustc-pull
+    secrets:
+      zulip-api-token: ${{ secrets.ZULIP_API_TOKEN }}
+      token: ${{ secrets.GITHUB_TOKEN }}

Cargo.lock

@@ -5,7 +5,8 @@ members = [
   "examples",
 ]
 exclude = [
-  "crates/wasm-assert-instr-tests"
+  "crates/wasm-assert-instr-tests",
+  "rust_programs",
 ]
 
 [profile.release]

Cargo.toml

@@ -4,16 +4,8 @@ stdarch - Rust's standard library SIMD components
 [![Actions Status](https://github.com/rust-lang/stdarch/workflows/CI/badge.svg)](https://github.com/rust-lang/stdarch/actions)
 
 
-# Crates
-
-This repository contains two main crates:
-
-* [`core_arch`](crates/core_arch/README.md) implements `core::arch` - Rust's
-  core library architecture-specific intrinsics, and
+This repository contains the [`core_arch`](crates/core_arch/README.md) crate, which implements `core::arch` - Rust's core library architecture-specific intrinsics.
 
-* [`std_detect`](crates/std_detect/README.md) implements `std::detect` - Rust's
-  standard library run-time CPU feature detection.
-
 The `std::simd` component now lives in the
 [`packed_simd_2`](https://github.com/rust-lang/packed_simd) crate.
 

README.md

@@ -1,4 +1,4 @@
-FROM ubuntu:25.04
+FROM ubuntu:25.10
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc \
   g++ \
@@ -10,7 +10,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   qemu-user \
   make \
   file \
-  clang-19 \
+  clang \
   lld
 
 ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc \