Rollup of 5 pull requests by JonathanBrouwer · Pull Request #157433 · rust-lang/rust

JonathanBrouwer · 2026-06-04T13:33:27Z

Successful merges:

Record failed tests with --record, and rerun them with --rerun #154586 (Record failed tests with --record, and rerun them with --rerun)
delegation: split resolution and lowering #157296 (delegation: split resolution and lowering)
Fix a coroutine UI test which is missing #[coroutine] #156171 (Fix a coroutine UI test which is missing #[coroutine])
tests: codegen-llvm: Update bpf-alu32 with the new LLVM attributes #157249 (tests: codegen-llvm: Update bpf-alu32 with the new LLVM attributes)
rustc-dev-guide subtree update #157426 (rustc-dev-guide subtree update)

r? @ghost

Create a similar rollup

fix -s to -S in llvm tooling instructiongs

…0505-stage Fix name of first compiled stage, as stage0 is downloaded

Replace `rustc_session::parse::feature*` with ``rustc_session::errors::feature*`

Update dependencies to remove windows-targets dependency

Autodiff doc updates

autodiff: reference rustup installation support

This updates the rust-version file to a31c27a.

Pull recent changes from https://github.com/rust-lang/rust via Josh. Upstream ref: rust-lang/rust@a31c27a Filtered ref: rust-lang/rustc-dev-guide@66a2aa8 Upstream diff: rust-lang/rust@f2b291d...a31c27a This merge was created using https://github.com/rust-lang/josh-sync.

…c-pull Rustc pull update

Fix sample code for std::offload at usage.md

Clarify importance of `target-cpu` flag for offload

Added note about stage2 dependency in rustup toolchain linking.

Added a note about building tools and linked to tool tests section.

Add note on building tools in how-to-build-and-run.md

Add docs for non defining vs defining uses in opaque types

Co-authored-by: jyn <github@jyn.dev>

Update quickstart.md with stage2 note

@petrochenkov

…ve, r=petrochenkov delegation: split resolution and lowering This PR splits delegation's AST -> HIR lowering and its resolution. Now we resolve all delegations and then lower them. This should have benefits: - ~For rust-lang#156798, where it will be convenient to insert diagnostics about specifying target expressions for glob reuses of only static functions (the `delegations_resolutions` map will contain information whether to lower or delete target expression)~ - For rust-lang#155337 and delegations to inherent methods resolution, as from what I tested up until now we should resolve them in iterative manner before AST -> HIR lowering. Part of rust-lang#118212. r? @petrochenkov

…llot Fix a coroutine UI test which is missing `#[coroutine]` This looks like a typo, although the test now produces a different error to the other errors in the file. I also fixed some comment typos in tests, happy to drop that commit if you don't want to review it.

@nagisa

…u32, r=nikic tests: codegen-llvm: Update bpf-alu32 with the new LLVM attributes The LLVM backend now emits `noundef zeroext` on `i8` return values and `noundef` on `i8` parameters. Update the FileCheck pattern to match. r? @nagisa

@ghost

rustc-dev-guide subtree update Subtree update of `rustc-dev-guide` to rust-lang/rustc-dev-guide@e99720b. Created using https://github.com/rust-lang/josh-sync. r? @ghost

JonathanBrouwer · 2026-06-04T13:33:40Z

@bors r+ rollup=never p=5

rust-bors · 2026-06-04T13:33:42Z

📌 Commit 798684a has been approved by JonathanBrouwer

It is now in the queue for this repository.

rust-bors · 2026-06-04T17:24:54Z

☀️ Test successful - CI
Approved by: JonathanBrouwer
Duration: 3h 19m 12s
Pushing b3f7e32 to main...

rust-timer · 2026-06-04T17:26:27Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#154586	Record failed tests with `--record`, and rerun them with `-…	`d68e178610068f27d43be17765f820774aa4cfbb` (link)
#156171	Fix a coroutine UI test which is missing `#[coroutine]`	`6fce9b3ddb035a564324cab3b00299af979fdad8` (link)
#157249	tests: codegen-llvm: Update bpf-alu32 with the new LLVM att…	`821c6d868bd44ee50ead05ad45c636d05f3fe5fb` (link)
#157296	delegation: split resolution and lowering	`5d52d85fa992ee42a71334ebdbb2fbeed248ee24` (link)
#157426	rustc-dev-guide subtree update	`918bed642909ee11d66b455dab29cf9fe278cc3e` (link)

previous master: 9ae765da47

In the case of a perf regression, run the following command for each PR you suspect might be the cause: @rust-timer build $SHA

github-actions · 2026-06-04T17:28:20Z

What is this?

This is an experimental post-merge analysis report that shows differences in test outcomes between the merged PR and its parent PR.

Comparing 9ae765d (parent) -> b3f7e32 (this PR)

Test differences

Show 68 test diffs

Stage 1

[codegen] tests/codegen-llvm/bpf-alu32.rs: ignore (only executed when the architecture is bpf) -> pass (J1)

Stage 2

[codegen] tests/codegen-llvm/bpf-alu32.rs: ignore (only executed when the architecture is bpf) -> pass (J0)

Additionally, 66 doctest diffs were found. These are ignored, as they are noisy.

Job group index

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard b3f7e3204640c7458c9f5096f3e9c5ad9971a51c --output-dir test-dashboard

And then open test-dashboard/index.html in your browser to see an overview of all executed tests.

Job duration changes

x86_64-gnu-gcc-core-tests: 9m 52s -> 14m 36s (+47.8%)
x86_64-msvc-ext1: 1h 42m -> 2h 18m (+34.7%)
dist-x86_64-illumos: 1h 24m -> 1h 51m (+32.3%)
x86_64-gnu-aux: 1h 48m -> 2h 18m (+27.9%)
x86_64-gnu-llvm-21-1: 43m 19s -> 54m 54s (+26.7%)
x86_64-gnu-nopt: 2h 31m -> 1h 52m (-25.9%)
dist-i686-mingw: 2h 6m -> 2h 37m (+24.8%)
dist-x86_64-apple: 2h 8m -> 2h 38m (+22.7%)
dist-x86_64-mingw: 2h 3m -> 2h 30m (+21.8%)
dist-powerpc64-linux-musl: 1h 16m -> 1h 32m (+21.6%)

How to interpret the job duration changes?

Job durations can vary a lot, based on the actual runner instance
that executed the job, system noise, invalidated caches, etc. The table above is provided
mostly for t-infra members, for simpler debugging of potential CI slow-downs.

rust-timer · 2026-06-04T18:06:37Z

Finished benchmarking commit (b3f7e32): comparison URL.

Overall result: ❌ regressions - please read:

Our benchmarks found a performance regression caused by this PR.
This might be an actual regression, but it can also be just noise.

Next Steps:

If the regression was expected or you think it can be justified,
please write a comment with sufficient written justification, and add
@rustbot label: +perf-regression-triaged to it, to mark the regression as triaged.
If you think that you know of a way to resolve the regression, try to create
a new PR with a fix for the regression.
If you do not understand the regression or you think that it is just noise,
you can ask the @rust-lang/wg-compiler-performance working group for help (members of this group
were already notified of this PR).

@rustbot label: +perf-regression
cc @rust-lang/wg-compiler-performance

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	0.7%	[0.7%, 0.7%]	1
Regressions ❌ (secondary)	0.4%	[0.4%, 0.4%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.7%	[0.7%, 0.7%]	1

Max RSS (memory usage)

Results (primary 6.5%, secondary 2.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	6.5%	[6.5%, 6.5%]	1
Regressions ❌ (secondary)	5.9%	[5.7%, 6.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-5.0%	[-5.0%, -5.0%]	1
All ❌✅ (primary)	6.5%	[6.5%, 6.5%]	1

Cycles

Results (secondary -2.4%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.3%	[2.1%, 2.6%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-4.8%	[-11.4%, -1.9%]	4
All ❌✅ (primary)	-	-	0

Binary size

Results (primary 0.0%, secondary 0.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	0.0%	[0.0%, 0.0%]	4
Regressions ❌ (secondary)	0.0%	[0.0%, 0.0%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.0%	[0.0%, 0.0%]	4

Bootstrap: 515.26s -> 512.944s (-0.45%)
Artifact size: 400.73 MiB -> 398.65 MiB (-0.52%)

JonathanBrouwer · 2026-06-04T18:17:16Z

@rustbot label: +perf-regression-triaged
Noise

…nathanBrouwer Rollup of 5 pull requests Successful merges: - rust-lang#154586 (Record failed tests with `--record`, and rerun them with `--rerun`) - rust-lang#157296 (delegation: split resolution and lowering) - rust-lang#156171 (Fix a coroutine UI test which is missing `#[coroutine]`) - rust-lang#157249 (tests: codegen-llvm: Update bpf-alu32 with the new LLVM attributes) - rust-lang#157426 (rustc-dev-guide subtree update)

xonx4l and others added 30 commits January 21, 2026 13:07

add docs for non defining vs defining uses

14026bf

Fix name of first compiled stage, as stage0 is downloaded

8d57ec1

fix -s to -S in llvm tooling instructiongs

7e14c4e

Merge pull request rust-lang#2868 from rust-lang/autodiff-dbg-typo

9d0faee

fix -s to -S in llvm tooling instructiongs

Merge pull request rust-lang/rustc-dev-guide#2864 from cammeresi/2026…

91d0f9f

…0505-stage Fix name of first compiled stage, as stage0 is downloaded

move feature* methods from parse mod to errors mod

aa42817

Merge pull request rust-lang#2869 from rust-lang/mv-feature-methods

f64009b

Replace `rustc_session::parse::feature*` with ``rustc_session::errors::feature*`

Update dependencies to remove windows-targets dependency

420c26e

Merge pull request rust-lang#2870 from bjorn3/windows_sys_0_61

4b53eb5

Update dependencies to remove windows-targets dependency

update std::autodiff link to point to nighlty autodiff docs

b6f6ba8

add short motivation

fef299d

Merge pull request rust-lang#2871 from rust-lang/autodiff-doc-updates

78c4ea6

Autodiff doc updates

reference rustup installation support

51ef55a

Merge pull request rust-lang#2873 from rust-lang/update-autodiff-rustup

f205084

autodiff: reference rustup installation support

Fix sample code for std::offload at usage.md

792f73c

Prepare for merging from rust-lang/rust

e2f2990

This updates the rust-version file to a31c27a.

Merge pull request rust-lang/rustc-dev-guide#2875 from rust-lang/rust…

45aa7c9

…c-pull Rustc pull update

Merge pull request rust-lang#2874 from sgasho/main

19da8b2

Fix sample code for std::offload at usage.md

Clarify importance of target-cpu flag for offload

4fe70e6

fix: use div with class warning

40f27e8

Merge pull request rust-lang#2876 from xkevio/patch-2

38e65c7

Clarify importance of `target-cpu` flag for offload

Update quickstart.md with stage2 note

76c3344

Added note about stage2 dependency in rustup toolchain linking.

Add note on building tools in how-to-build-and-run.md

df80304

Added a note about building tools and linked to tool tests section.

Update how-to-build-and-run.md

8a0eb89

Merge pull request rust-lang#2878 from Its-Just-Nans/patch-2

43d3597

Add note on building tools in how-to-build-and-run.md

Merge pull request rust-lang#2736 from xonx4l/non-def-vs-def

ae93d51

Add docs for non defining vs defining uses in opaque types

Update quickstart.md

7cfb791

Update src/building/quickstart.md

1cd2388

Co-authored-by: jyn <github@jyn.dev>

Merge pull request rust-lang#2877 from Its-Just-Nans/patch-1

b16d7eb

Update quickstart.md with stage2 note

JonathanBrouwer added 4 commits June 4, 2026 15:33

Rollup merge of rust-lang#157426 - tshepang:rdg-sync, r=tshepang

798684a

rustc-dev-guide subtree update Subtree update of `rustc-dev-guide` to rust-lang/rustc-dev-guide@e99720b. Created using https://github.com/rust-lang/josh-sync. r? @ghost

rust-bors Bot added the rollup A PR which is a rollup label Jun 4, 2026

rust-bors Bot 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 Jun 4, 2026

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rust-bors Bot added merged-by-bors This PR was explicitly merged by bors. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Jun 4, 2026

rust-bors Bot merged commit b3f7e32 into rust-lang:main Jun 4, 2026
13 checks passed

rustbot added this to the 1.98.0 milestone Jun 4, 2026

This was referenced Jun 4, 2026

delegation: do not always generate first argument #156798

Merged

Revert "LLVM 23: Run AssignGUIDPass in some places" #157365

Merged

rustbot added the perf-regression Performance regression. label Jun 4, 2026

rustbot added the perf-regression-triaged The performance regression has been triaged. label Jun 4, 2026

JonathanBrouwer deleted the rollup-d3I87zR branch August 21, 2026 08:22

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Rollup of 5 pull requests - #157433

Rollup of 5 pull requests#157433
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Test differences

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Job duration changes

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Overall result: ❌ regressions - please read:

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