Rollup of 18 pull requests

[Zalathar]

Successful merges:

• rustc_codegen_gcc subtree update #162499 (rustc_codegen_gcc subtree update)
• implement VaArgSafe for f128 #161424 (implement VaArgSafe for f128)
• Add Natvis visualiser and debuginfo tests for f128 #161777 (Add Natvis visualiser and debuginfo tests for f128)
• Avoid suggesting imports of traits declared inside fn bodies #162506 (Avoid suggesting imports of traits declared inside fn bodies)
• Move parse error recovery for expression operators "out of line" & refactor in the area #162591 (Move parse error recovery for expression operators "out of line" & refactor in the area)
• [rustdoc] Correctly handle intra-doc links on inlined same item with different names #162669 ([rustdoc] Correctly handle intra-doc links on inlined same item with different names)
• Add useful APIs to Unique(Arc|Rc) #162733 (Add useful APIs to Unique(Arc|Rc))
• Refactor LivenessResults into LivenessComputation, without typeck #162913 (Refactor LivenessResults into LivenessComputation, without typeck)
• More AST lowering cleanups #162950 (More AST lowering cleanups)
• Update browser-ui-test version to 0.25.2 #162964 (Update browser-ui-test version to 0.25.2)
• mark f128 as reliable on powerpc64 with +vsx #162979 (mark f128 as reliable on powerpc64 with +vsx)
• Add performance notes for the floating-point round method #161743 (Add performance notes for the floating-point round method)
• yeet AliasConstKind::opt_def_id #162797 (yeet AliasConstKind::opt_def_id)
• Ping T-libs-ping instead of T-libs-fcp for backports #162836 (Ping T-libs-ping instead of T-libs-fcp for backports)
• Adjust bug!/span_bug! emission #162873 (Adjust bug!/span_bug! emission)
• Add .seek_read_exact(), .seek_write_all() to std::os::windows::fs::FileExt #162875 (Add .seek_read_exact(), .seek_write_all() to std::os::windows::fs::FileExt)
• Add missing #[repr(C)] in UI, codegen and assembly tests #162956 (Add missing #[repr(C)] in UI, codegen and assembly tests)
• rustc-dev-guide subtree update #162981 (rustc-dev-guide subtree update)

Failed merges:

• Properly implement the gpu-kernel ABI for amdgpu #162177 (Properly implement the gpu-kernel ABI for amdgpu)

r? @ghost

Create a similar rollup

[Zalathar]

Rollup of everything.

@bors r+ rollup=never p=5

[rust-bors]

📌 Commit d634e9c has been approved by Zalathar

It is now in the queue for this repository.

[tgross35]

@bors yield to the beta backport

[rust-bors]

Auto build was cancelled. Cancelled workflows:

• https://github.com/rust-lang/rust/actions/runs/35420868584

The next pull request likely to be tested is #162987.

[tgross35]

@bors retry

[rust-bors]

❗ You can only retry pull requests that are approved and have a previously failed auto build.

Hint: If you wanted to retry pull request CI instead, push the latest commit again, or close and then reopen this PR.

[tgross35]

I thought yield put it back in the queue, huh
@bors r+

[rust-bors]

📌 Commit d634e9c has been approved by tgross35

It is now in the queue for this repository.

[rust-log-analyzer]

The job test-x86_64-msvc-1 failed! Check out the build log: (web) (plain enhanced) (plain)

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

failures:

---- fs::tests::file_test_windows_fileext_trait_case_2 stdout ----

thread 'fs::tests::file_test_windows_fileext_trait_case_2' (5328) panicked at library\std\src\fs\tests.rs:883:46:
called `Result::unwrap_err()` on an `Ok` value: 0
---- fs::tests::file_test_windows_fileext_trait_case_2 stdout end ----

failures:
    fs::tests::file_test_windows_fileext_trait_case_2

test result: FAILED. 413 passed; 1 failed; 6 ignored; 0 measured; 0 filtered out; finished in 8.93s

error: test failed, to rerun pass `-p std --lib`
Bootstrap failed while executing `test --stage 2 --skip=compiler --skip=src`
Currently active steps:
test::Crate { build_compiler: Compiler { stage: 2, host: x86_64-pc-windows-msvc, forced_compiler: false }, target: x86_64-pc-windows-msvc, mode: Std, crates: ["alloc", "alloctests", "compiler_builtins", "core", "coretests", "panic_abort", "panic_unwind", "proc_macro", "profiler_builtins", "rustc-std-workspace-core", "std", "std_detect", "sysroot", "test", "unwind"] } at src\bootstrap\src\core\build_steps\test.rs:3522
Build completed unsuccessfully in 1:08:02
make: *** [Makefile:115: ci-msvc-py] Error 1
  local time: Sat Sep 19 05:38:15 CUT 2026
  network time: Sat, 19 Sep 2026 05:38:15 GMT
##[error]Process completed with exit code 2.
##[group]Run echo "disk usage:"
echo "disk usage:"

[rust-bors]

💔 Test for 3d463a0 failed: CI. Failed job:

• auto - test-x86_64-msvc-1 (web logs, enhanced plaintext logs)

[rust-bors]

PR #162875, which is a member of this rollup, was unapproved.