Subtree sync for rustc_codegen_cranelift

[bjorn3]

The main highlight this time is an update to Cranelift 0.135, which should fix crates like linkme on macOS.

r? @ghost

@rustbot label +A-codegen +A-cranelift +T-compiler +subtree-sync

[bjorn3]

@bors r+ p=1 subtree sync

[rust-bors]

📌 Commit 951ad7b has been approved by bjorn3

It is now in the queue for this repository.

[rust-bors]

⌛ Testing commit 951ad7b with merge 19f9548...

Workflow: https://github.com/rust-lang/rust/actions/runs/34222761550

[JonathanBrouwer]

@bors yield
Yielding to enclosing rollup

[rust-bors]

Auto build was cancelled. Cancelled workflows:

• https://github.com/rust-lang/rust/actions/runs/34222761550

The next pull request likely to be tested is #162466.

[bjorn3]

@bors r-

[rust-bors]

This PR was contained in a rollup (#162472), which was unapproved.

View changes since this unapproval

[bjorn3]

For some reason that rustc_private I removed in the last commit results in an unused feature warning when testing in the cg_clif repo, but is necessary when testing in this repo.
Edit: asking on zulip: https://rust-lang.zulipchat.com/#narrow/channel/146212-t-compiler.2Fconst-eval/topic/weird.20const.20function.20stability.20error.20for.20cg_clif/with/622512126

[rust-log-analyzer]

The job test-aarch64-gnu-llvm-21-2 failed! Check out the build log: (web) (plain enhanced) (plain)

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

error: `align_of` is not yet stable as a const intrinsic
##[error]   --> example/mini_core.rs:774:26
    |
774 |     const ALIGN: usize = intrinsics::align_of::<Self>();
    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
help: add `#![feature(rustc_private)]` to the crate attributes to enable
    |
 18 + #![feature(rustc_private)]
    |

error: aborting due to 2 previous errors

"/checkout/obj/build/aarch64-unknown-linux-gnu/stage2-codegen/cg_clif/dist/rustc-clif" "-Zannotate-moves" "-Zrandomize-layout" "-Zunstable-options" "--check-cfg=cfg(bootstrap)" "-Zmacro-backtrace" "-Csplit-debuginfo=off" "-Clink-arg=-L/usr/lib/llvm-21/lib" "-Cllvm-args=-import-instr-limit=10" "-Clink-args=-Wl,-z,origin" "-Clink-args=-Wl,-rpath,$ORIGIN/../lib" "-Alinker-messages" "-L" "crate=/checkout/obj/build/aarch64-unknown-linux-gnu/stage2-codegen/cg_clif/build/example" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2-codegen/cg_clif/build/example" "-Cdebuginfo=2" "--target" "aarch64-unknown-linux-gnu" "-Cpanic=abort" "--check-cfg=cfg(jit)" "--check-cfg=cfg(target_has_reliable_f128)" "--edition=2024" "example/mini_core.rs" "--crate-type" "lib,dylib" exited with status ExitStatus(unix_wait_status(256))
Bootstrap failed while executing `--stage 2 test --skip tidy --skip intrinsic-test --skip src/tools/rust-analyzer --skip tests --skip library --skip tidyselftest`
Currently active steps:
test::CodegenCranelift { compilers: RustcPrivateCompilers { build_compiler: Compiler { stage: 1, host: aarch64-unknown-linux-gnu, forced_compiler: false }, target_compiler: Compiler { stage: 2, host: aarch64-unknown-linux-gnu, forced_compiler: false } }, target: aarch64-unknown-linux-gnu } at src/bootstrap/src/core/build_steps/test.rs:4393
Command `/checkout/obj/build/aarch64-unknown-linux-gnu/stage0/bin/cargo run --target aarch64-unknown-linux-gnu -Zbinary-dep-depinfo -j 4 -Zroot-dir=/checkout -Zembed-metadata=no --locked --color=always --profile=release --manifest-path /checkout/compiler/rustc_codegen_cranelift/build_system/Cargo.toml -- test --download-dir /checkout/obj/build/cg_clif_download --out-dir /checkout/obj/build/aarch64-unknown-linux-gnu/stage2-codegen/cg_clif --no-unstable-features --use-backend cranelift --sysroot llvm --skip-test testsuite.extended_sysroot [workdir=/checkout/compiler/rustc_codegen_cranelift]` failed with exit code 1
Created at: src/bootstrap/src/core/build_steps/test.rs:4407:25
Executed at: src/bootstrap/src/core/build_steps/test.rs:4451:26

Command has failed. Rerun with -v to see more details.
Build completed unsuccessfully in 0:20:11
  local time: Tue Sep  8 11:58:20 UTC 2026
  network time: Tue, 08 Sep 2026 11:58:20 GMT
##[error]Process completed with exit code 1.
##[group]Run echo "disk usage:"