Rollup of 6 pull requests #148507

Zalathar · 2025-11-04T23:59:22Z

Successful merges:

Add alignment parameter to simd_masked_{load,store} #147355 (Add alignment parameter to simd_masked_{load,store})
Fix tests for big-endian #147925 (Fix tests for big-endian)
compiler: Fix a couple issues around cargo feature unification #148341 (compiler: Fix a couple issues around cargo feature unification)
Dogfood trim_{suffix|prefix} in compiler #148371 (Dogfood trim_{suffix|prefix} in compiler)
Implement Path::is_empty #148495 (Implement Path::is_empty)
rustc-dev-guide subtree update #148502 (rustc-dev-guide subtree update)

r? @ghost
@rustbot modify labels: rollup

The tests fail on s390x and presumably other big-endian systems, due to check of raw alloc values in the MIR output. To fix the tests remove the raw bytes from the MIR output (via: compile-flags: -Zdump-mir-exclude-alloc-bytes) and update the matching diffs.

add tool to "enforce" semantic line breaks

sembr tool: handle a corner case

…me-tests-chapters fix another corner case for sembr tool

sembr tool: add some hints on usage

about sembr tool

Also, tidy does a lot more than follow Rust Style Guide

fix typo in autodiff docs

The first was a warning: ``` Testing stage2 {rustc_parse_format} (aarch64-apple-darwin) Compiling rustc_index v0.0.0 (/Users/ci/project/compiler/rustc_index) error: extern crate `smallvec` is unused in crate `rustc_index` --> compiler/rustc_index/src/lib.rs:2:1 | 2 | #![cfg_attr(all(feature = "nightly", test), feature(stmt_expr_attributes))] | ^ | = help: remove the dependency or add `use smallvec as _;` to the crate root = note: `-D unused-crate-dependencies` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(unused_crate_dependencies)]` error: could not compile `rustc_index` (lib) due to 1 previous error ``` The second was that `type_ir_macros` didn't fully specify its dependencies: ``` Testing stage1 {rustc_type_ir_macros} (aarch64-apple-darwin) Compiling rustc_type_ir_macros v0.0.0 (/Users/jyn/src/ferrocene3/compiler/rustc_type_ir_macros) error[E0432]: unresolved import `syn::visit_mut` --> compiler/rustc_type_ir_macros/src/lib.rs:2:10 | 2 | use syn::visit_mut::VisitMut; | ^^^^^^^^^ could not find `visit_mut` in `syn` | note: found an item that was configured out --> /Users/jyn/.local/lib/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.106/src/lib.rs:880:21 | 878 | #[cfg(feature = "visit-mut")] | --------------------- the item is gated behind the `visit-mut` feature 879 | #[cfg_attr(docsrs, doc(cfg(feature = "visit-mut")))] 880 | pub use crate::gen::visit_mut; | ^^^^^^^^^ error[E0433]: failed to resolve: could not find `visit_mut` in `syn` --> compiler/rustc_type_ir_macros/src/lib.rs:206:18 | 206 | syn::visit_mut::visit_type_path_mut(self, i); | ^^^^^^^^^ could not find `visit_mut` in `syn` | note: found an item that was configured out --> /Users/jyn/.local/lib/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.106/src/lib.rs:880:21 | 878 | #[cfg(feature = "visit-mut")] | --------------------- the item is gated behind the `visit-mut` feature 879 | #[cfg_attr(docsrs, doc(cfg(feature = "visit-mut")))] 880 | pub use crate::gen::visit_mut; | ^^^^^^^^^ ```

This updates the rust-version file to c5dabe8.

Pull recent changes from https://github.com/rust-lang/rust via Josh. Upstream ref: c5dabe8 Filtered ref: d867ed05e46e3ba4d231efe9df26fcc9310b5d09 Upstream diff: rust-lang/rust@b1b464d...c5dabe8 This merge was created using https://github.com/rust-lang/josh-sync.

Rustc pull update

This was updated recently. Also, the annotation was broken, so would not appear in date-check issue.

bors · 2025-11-05T00:43:29Z

⌛ Testing commit 41382a4 with merge dbaea8b...

Rollup of 6 pull requests Successful merges: - #147355 (Add alignment parameter to `simd_masked_{load,store}`) - #147925 (Fix tests for big-endian) - #148341 (compiler: Fix a couple issues around cargo feature unification) - #148371 (Dogfood `trim_{suffix|prefix}` in compiler) - #148495 (Implement Path::is_empty) - #148502 (rustc-dev-guide subtree update) r? `@ghost` `@rustbot` modify labels: rollup

bors · 2025-11-05T04:14:02Z

💔 Test failed - checks-actions

Zalathar · 2025-11-05T04:21:20Z

GitHub Actions isn't showing full logs for the failed job, so treating it as runner flakiness. 😿

@bors retry

bors · 2025-11-05T07:25:44Z

⌛ Testing commit 41382a4 with merge 8e0b68e...

bors · 2025-11-05T10:29:25Z

☀️ Test successful - checks-actions
Approved by: Zalathar
Pushing 8e0b68e to master...

rust-timer · 2025-11-05T10:31:13Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#147355	Add alignment parameter to `simd_masked_{load,store}`	`388aa009604c168f417e75cae4b230f2847fa29b` (link)
#147925	Fix tests for big-endian	`022be78f8d1b2e2e26ab35e583445b6566b83387` (link)
#148341	compiler: Fix a couple issues around cargo feature unificat…	`7afe48e69451ae9eb68b0403acb31d3ce5ee632c` (link)
#148371	Dogfood `trim_{suffix\|prefix}` in compiler	`d302e5c94ab0b680260b5b01bc6c58da71c003c4` (link)
#148495	Implement Path::is_empty	`96698bd49ebd63a7c71e286c2b52bfa9cb5d34d4` (link)
#148502	rustc-dev-guide subtree update	`aa2405f06714f8d71749f6aaa238a8e8d723a71a` (link)

previous master: c0ff72ffc4

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 · 2025-11-05T10:33:12Z

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 c0ff72f (parent) -> 8e0b68e (this PR)

Test differences

Show 194 test diffs

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

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard 8e0b68e63cd2b7b6d18474fe6f49df6fb1570c25 --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

dist-i586-gnu-i586-i686-musl: 5489.2s -> 4844.3s (-11.7%)
x86_64-msvc-2: 6863.9s -> 7623.5s (+11.1%)
dist-aarch64-msvc: 5852.1s -> 5306.9s (-9.3%)
aarch64-msvc-1: 7350.2s -> 6802.7s (-7.4%)
dist-x86_64-solaris: 5145.2s -> 5523.5s (+7.4%)
pr-check-1: 1964.4s -> 1821.6s (-7.3%)
dist-aarch64-apple: 6090.1s -> 6532.1s (+7.3%)
dist-apple-various: 3776.0s -> 4049.3s (+7.2%)
x86_64-rust-for-linux: 2849.7s -> 2646.7s (-7.1%)
dist-i686-mingw: 9784.1s -> 9164.0s (-6.3%)

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 · 2025-11-05T14:35:51Z

Finished benchmarking commit (8e0b68e): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

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)	0.2%	[0.2%, 0.2%]	1
Regressions ❌ (secondary)	0.1%	[0.1%, 0.1%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.5%	[-0.9%, -0.1%]	8
All ❌✅ (primary)	0.2%	[0.2%, 0.2%]	1

Max RSS (memory usage)

Results (primary -0.2%, secondary 3.5%)

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

	mean	range	count
Regressions ❌ (primary)	0.8%	[0.8%, 0.8%]	1
Regressions ❌ (secondary)	4.1%	[1.7%, 6.0%]	10
Improvements ✅ (primary)	-1.2%	[-1.2%, -1.2%]	1
Improvements ✅ (secondary)	-3.0%	[-3.0%, -3.0%]	1
All ❌✅ (primary)	-0.2%	[-1.2%, 0.8%]	2

Cycles

Results (primary 3.5%, secondary 2.7%)

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

	mean	range	count
Regressions ❌ (primary)	3.5%	[3.5%, 3.5%]	1
Regressions ❌ (secondary)	5.0%	[1.3%, 9.7%]	7
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-5.4%	[-6.6%, -4.3%]	2
All ❌✅ (primary)	3.5%	[3.5%, 3.5%]	1

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 474.063s -> 475.57s (0.32%)
Artifact size: 390.97 MiB -> 390.76 MiB (-0.05%)

Rollup of 6 pull requests Successful merges: - rust-lang#147355 (Add alignment parameter to `simd_masked_{load,store}`) - rust-lang#147925 (Fix tests for big-endian) - rust-lang#148341 (compiler: Fix a couple issues around cargo feature unification) - rust-lang#148371 (Dogfood `trim_{suffix|prefix}` in compiler) - rust-lang#148495 (Implement Path::is_empty) - rust-lang#148502 (rustc-dev-guide subtree update) r? `@ghost` `@rustbot` modify labels: rollup

Mark-Simulacrum · 2025-11-11T03:25:22Z

Regressions look likely to be bimodality to me. Marking as triaged.

fneddy and others added 30 commits October 21, 2025 08:30

Fix tests for big-endian

cbae956

The tests fail on s390x and presumably other big-endian systems, due to check of raw alloc values in the MIR output. To fix the tests remove the raw bytes from the MIR output (via: compile-flags: -Zdump-mir-exclude-alloc-bytes) and update the matching diffs.

add tool to check sembr

ca3e640

sample output

7dd4509

check on ci

cf99a9e

Merge pull request rust-lang#1485 from tshepang/semantic-line-breaks

86136ba

add tool to "enforce" semantic line breaks

sample output

057f15e

handle a corner case

4c0120e

Merge pull request rust-lang#2618 from rust-lang/tshepang/corner-case

804250b

sembr tool: handle a corner case

fix env use

14a9900

sample output

cc1ab93

fix corner case

0c21841

Merge pull request rust-lang#2619 from rust-lang/tshepang/reformat-so…

7f1a1b2

…me-tests-chapters fix another corner case for sembr tool

about sembr tool

08235dd

sembr tool: add some hints on usage

8654d0e

Merge pull request rust-lang#2621 from rust-lang/tshepang/sembr-help

629aeb1

sembr tool: add some hints on usage

Merge pull request rust-lang#2620 from rust-lang/tshepang-patch-2

c6344c5

about sembr tool

contributing.md: ease copy-paste

a9c7730

Also, tidy does a lot more than follow Rust Style Guide

fix typo in autodiff docs

1fbaa24

Merge pull request rust-lang#2623 from rust-lang/autodiff-typo

c6d1b14

fix typo in autodiff docs

Merge pull request rust-lang#2622 from rust-lang/master

edb4cb5

Dogfood trim_{suffix|prefix} in compiler

d28dcc7

Prepare for merging from rust-lang/rust

c850c27

This updates the rust-version file to c5dabe8.

Merge pull request rust-lang#2625 from rust-lang/rustc-pull

b72660c

Rustc pull update

Add alignment parameter to simd_masked_{load,store}

75de619

Add implementation of the alignment parameter in Miri

ffe6cf6

Implement the alignment parameter in cg_clif

21fb801

sembr src/tests/minicore.md

0588be0

date-check src/tests/minicore.md

df4d883

This was updated recently. Also, the annotation was broken, so would not appear in date-check issue.

bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Nov 4, 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 Nov 5, 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 Nov 5, 2025

bors added the merged-by-bors This PR was explicitly merged by bors. label Nov 5, 2025

bors merged commit 8e0b68e into rust-lang:master Nov 5, 2025
12 checks passed

rustbot added this to the 1.93.0 milestone Nov 5, 2025

Zalathar deleted the rollup-vvz4knr branch November 5, 2025 10:35

rustbot added the perf-regression Performance regression. label Nov 5, 2025

This was referenced Nov 5, 2025

Add #[rustc_pass_indirectly_in_non_rustic_abis] #144529

Merged

Rollup of 4 pull requests #148472

Merged

Mark-Simulacrum added the perf-regression-triaged The performance regression has been triaged. label Nov 11, 2025

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Rollup of 6 pull requests #148507

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Test differences

Job duration changes

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rust-timer commented Nov 5, 2025

Overall result: ❌✅ regressions and improvements - please read the text below

Instruction count

Max RSS (memory usage)

Cycles

Binary size

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