Rollup of 8 pull requests #141232

fmease · 2025-05-18T16:44:15Z

Successful merges:

Stabilize the avx512 target features #138940 (Stabilize the avx512 target features)
split asm! parsing and validation #140490 (split asm! parsing and validation)
std: stop using TLS in signal handler #140628 (std: stop using TLS in signal handler)
name resolution for guard patterns #140746 (name resolution for guard patterns)
Return value of coroutine_layout fn changed to Result with LayoutError #140926 (Return value of coroutine_layout fn changed to Result with LayoutError)
bump windows crate for compiler,bootstrap and tools #141127 (bump windows crate for compiler,bootstrap and tools)
Miri subtree update #141214 (Miri subtree update)
gvn: avoid creating overlapping assignments #141218 (gvn: avoid creating overlapping assignments)

r? @ghost
@rustbot modify labels: rollup

TLS is not async-signal-safe, making its use in the signal handler used to detect stack overflows unsound (c.f. rust-lang#133698). POSIX however lists two thread-specific identifiers that can be obtained in a signal handler: the current `pthread_t` and the address of `errno`. Since `pthread_equal` is not AS-safe, `pthread_t` should be considered opaque, so for our purposes, `&errno` is the only option. This however works nicely: we can use the address as a key into a map that stores information for each thread. This PR uses a `BTreeMap` protected by a spin lock to hold the guard page address and thread name and thus fixes rust-lang#133698.

I'll be modifying it in future commits, so I think it's cleanest to abstract it out. Possibly a newtype would be ideal, but for now this is least disruptive.

This splits introduction of bindings into scope (`apply_pattern_bindings`) apart from manipulation of the pattern's binding map (`fresh_binding`). By delaying the latter, we can keep bindings from appearing in-scope in guards. Since `fresh_binding` is now specifically for manipulating a pattern's bindings map, this commit also inlines a use of `fresh_binding` that was only adding to the innermost rib.

Automatic Rustup

Co-authored-by: Travis Cross <tc@traviscross.com>

apparently it doesn't really use the asm parsing at present, so this may work?

…u,traviscross Stabilize the avx512 target features This PR stabilizes the AVX512 target features - see [this comment](rust-lang#111137 (comment)). Tracking Issue - rust-lang#44839 The target feature UI tests have been changed to `x87` (chosen because this is very unlikely to stablize ever, please comment if some other feature will be better) related: rust-lang#111137

…manieu,traviscross split `asm!` parsing and validation This PR splits `asm!` parsing and validation into two separate steps. The parser constructs a `Vec<RawAsmArg>`, with each element corresponding to an argument to one of the `asm!` macros. The validation then checks things like ordering of arguments or that options are not provided twice. The motivation is rust-lang#140279, which wants to add `#[cfg(...)]` support to these arguments. This support can now be added in a straightforward way by adding an `attributes: ast::AttrVec` field to `RawAsmArg`. An extra reason for this split is that `rustfmt` probably wants to format the assembly at some point (currently that appears to be stubbed out, and the formatting is unstable rust-lang/style-team#152). r? ``@ghost`` (just want to look at CI for now) cc ``@ytmimi`` we discussed asm formatting a little while ago in rust-lang/rustfmt#6526. Am I correct in assuming that `AsmArgs` does not give enough information for formatting, but that `RawAsmArgs` would (it e.g. does not join information from multiple lines). This must have been an issue before? try-job: aarch64-apple

…imulacrum std: stop using TLS in signal handler TLS is not async-signal-safe, making its use in the signal handler used to detect stack overflows unsound (c.f. rust-lang#133698). POSIX however lists two thread-specific identifiers that can be obtained in a signal handler: the current `pthread_t` and the address of `errno`. Since `pthread_equal` is not AS-safe, `pthread_t` should be considered opaque, so for our purposes, `&errno` is the only option. This however works nicely: we can use the address as a key into a map that stores information for each thread. This PR uses a `BTreeMap` protected by a spin lock to hold the guard page address and thread name and thus fixes rust-lang#133698.

name resolution for guard patterns This PR provides an initial implementation of name resolution for guard patterns [(RFC 3637)](https://github.com/rust-lang/rfcs/blob/master/text/3637-guard-patterns.md). This does not change the requirement that the bindings on either side of an or-pattern must be the same [(proposal here)](https://github.com/rust-lang/rfcs/blob/master/text/3637-guard-patterns.md#allowing-mismatching-bindings-when-possible); the code that handles that is separate from what this PR touches, so I'm saving it for a follow-up. On a technical level, this separates "collecting the bindings in a pattern" (which was already done for or-patterns) from "introducing those bindings into scope". I believe the approach used here can be extended straightforwardly in the future to work with `if let` guard patterns, but I haven't tried it myself since we don't allow those yet. Tracking issue for guard patterns: rust-lang#129967 cc ``@Nadrieril``

…ne-layout-returns-layout-error, r=oli-obk Return value of coroutine_layout fn changed to Result with LayoutError Continue of rust-lang#140902: `coroutine_layout` fn is now returns `Result` with `LayoutError` to have consistent error with `layout_of_uncached`. `async_drop_coroutine_layout` fn is now return `LayoutError::TooGeneric` in case of not-fully-specialized `async_drop_in_place<T>::{closure}` coroutine.

…rsan68,jieyouxu bump windows crate for compiler,bootstrap and tools This dedupes crate versions. For `x86_64-pc-windows-msvc` stage1 cuts few kb from `rustc_driver.dll`, nice.

Miri subtree update r? ``@ghost`` Fixes rust-lang/miri#4328

fmease · 2025-05-18T16:44:31Z

@bors r+ rollup=never p=5

bors · 2025-05-18T16:44:33Z

📌 Commit 50b20b7 has been approved by fmease

It is now in the queue for this repository.

bors · 2025-05-18T16:46:14Z

⌛ Testing commit 50b20b7 with merge 4455c89...

bors · 2025-05-18T19:46:11Z

☀️ Test successful - checks-actions
Approved by: fmease
Pushing 4455c89 to master...

rust-timer · 2025-05-18T19:48:27Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#138940	Stabilize the avx512 target features	`327d73668bff30a78c106fd7f5ace10f47725281` (link)
#140490	split `asm!` parsing and validation	`fde8258ecf85fc5dc1c56988a1a70aac7c86e873` (link)
#140628	std: stop using TLS in signal handler	`92336870cb3a86b34b4b02e06db9dd04a099ed04` (link)
#140746	name resolution for guard patterns	`d39028d8cd281c73a6283b371269b5ee1fe4ef7c` (link)
#140926	Return value of coroutine_layout fn changed to Result with …	`0453a8fd52b84245d1dfdf28399147dc95045ac8` (link)
#141127	bump windows crate for compiler,bootstrap and tools	`deefe4c1e883208f3517c5b8e478177d9d454c0e` (link)
#141214	Miri subtree update	`70b2267c268c910e37e97842afc9b24b56752e9a` (link)
#141218	gvn: avoid creating overlapping assignments	`cabbe64191d448fec04fcf2c8deb3e2029454fc7` (link)

previous master: b53e5c9db0

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 · 2025-05-18T19:49:34Z

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 b53e5c9 (parent) -> 4455c89 (this PR)

Test differences

Show 20 test diffs

Stage 1

[mir-opt] tests/mir-opt/gvn_overlapping.rs: [missing] -> pass (J1)
[ui] tests/ui/pattern/rfc-3637-guard-patterns/name-resolution.rs: [missing] -> pass (J1)

Stage 2

[mir-opt] tests/mir-opt/gvn_overlapping.rs: [missing] -> pass (J0)
[ui] tests/ui/pattern/rfc-3637-guard-patterns/name-resolution.rs: [missing] -> pass (J2)

Additionally, 16 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 4455c8937007f3cc3c078375a335d86dbab391ce --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-aarch64-linux: 7485.8s -> 5276.3s (-29.5%)
dist-apple-various: 7783.8s -> 5946.6s (-23.6%)
x86_64-apple-1: 9147.4s -> 7586.7s (-17.1%)
dist-arm-linux: 5185.7s -> 4583.5s (-11.6%)
dist-aarch64-apple: 5528.4s -> 5047.6s (-8.7%)
x86_64-apple-2: 5289.1s -> 4891.2s (-7.5%)
dist-ohos-aarch64: 4863.0s -> 4569.3s (-6.0%)
dist-armhf-linux: 5372.9s -> 5058.4s (-5.9%)
x86_64-msvc-ext1: 7463.6s -> 7033.4s (-5.8%)
x86_64-gnu-llvm-20-2: 5902.2s -> 6240.9s (5.7%)

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 · 2025-05-18T22:33:31Z

Finished benchmarking commit (4455c89): 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

This is the most reliable metric that we have; it was used to determine the overall result at the top of this comment. However, even this metric can sometimes exhibit noise.

	mean	range	count
Regressions ❌ (primary)	0.8%	[0.4%, 1.2%]	8
Regressions ❌ (secondary)	0.9%	[0.2%, 3.2%]	15
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.7%	[-1.0%, -0.0%]	4
All ❌✅ (primary)	0.8%	[0.4%, 1.2%]	8

Max RSS (memory usage)

Results (primary -1.5%, secondary -2.4%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	3.1%	[3.1%, 3.1%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-2.7%	[-5.8%, -1.2%]	4
Improvements ✅ (secondary)	-2.4%	[-5.5%, -0.6%]	8
All ❌✅ (primary)	-1.5%	[-5.8%, 3.1%]	5

Cycles

Results (primary 0.6%, secondary 0.2%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	0.6%	[0.6%, 0.6%]	2
Regressions ❌ (secondary)	1.5%	[0.5%, 3.6%]	11
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.1%	[-4.6%, -0.5%]	6
All ❌✅ (primary)	0.6%	[0.6%, 0.6%]	2

Binary size

Results (primary 1.4%, secondary 3.5%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	1.4%	[0.2%, 3.9%]	29
Regressions ❌ (secondary)	3.5%	[0.3%, 4.0%]	76
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.4%	[0.2%, 3.9%]	29

Bootstrap: 776.543s -> 775.321s (-0.16%)
Artifact size: 365.45 MiB -> 365.53 MiB (0.02%)

Kobzol · 2025-05-20T17:16:20Z

The binary size and the biggest icount regressions come from #140628.

@rustbot label: +perf-regression-triaged

joboet and others added 30 commits May 5, 2025 15:18

add a type alias for the pattern bindings stack

3007433

I'll be modifying it in future commits, so I think it's cleanest to abstract it out. Possibly a newtype would be ideal, but for now this is least disruptive.

Return value of coroutine_layout fn changed to Result with LayoutError

ba80d82

disable the stack overflow handler on miri

2cdbd69

compiler & tools: bump windows crate to dedupe versions

9cacafd

bootstrap: bump windows too

40940e1

determine later whether an explicit reg was used

cd22c1b

extract operand parser

5af9652

Preparing for merge from rustc

4320e6f

Merge from rustc

789d1a4

fmt

84506c6

Stabilize avx512_target_feature

cf7cade

Remove uses of #[feature(avx512_target_feature)]

2898680

attempt to make doctests work properly with old and new cargo

48093fd

Merge pull request rust-lang#4327 from rust-lang/rustup-2025-05-18

0abf62f

Automatic Rustup

a new parser generating the exact same error messages

de8e305

Co-authored-by: Travis Cross <tc@traviscross.com>

attempt to have rustfmt use the new logic

7ec06fc

apparently it doesn't really use the asm parsing at present, so this may work?

delay error for unsupported options

e12d675

rename to get rid of the 'raw' concept

85053d1

add AsmOptions with some named fields

26e3a50

gvn: avoid creating overlapping assignments

d2e5a3d

name resolution for guard patterns

f0b8ec1

Rollup merge of rust-lang#141127 - klensy:windows-bump-61, r=albertla…

20bd597

…rsan68,jieyouxu bump windows crate for compiler,bootstrap and tools This dedupes crate versions. For `x86_64-pc-windows-msvc` stage1 cuts few kb from `rustc_driver.dll`, nice.

Rollup merge of rust-lang#141214 - RalfJung:miri-sync, r=RalfJung

cf3b1b1

Miri subtree update r? ``@ghost`` Fixes rust-lang/miri#4328

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 May 18, 2025

bors added the merged-by-bors This PR was explicitly merged by bors. label May 18, 2025

bors merged commit 4455c89 into rust-lang:master May 18, 2025
1 check passed

rustbot added this to the 1.89.0 milestone May 18, 2025

fmease deleted the rollup-qr9mobf branch May 18, 2025 20:51

bors mentioned this pull request May 18, 2025

Weekly cargo update #141205

Merged

rustbot added the perf-regression Performance regression. label May 18, 2025

Kobzol mentioned this pull request May 20, 2025

std: stop using TLS in signal handler #140628

Merged

rustbot added the perf-regression-triaged The performance regression has been triaged. label May 20, 2025

benesch mentioned this pull request Jul 26, 2025

regression: thread names missing from stack overflow error messages #144481

Closed

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Rollup of 8 pull requests #141232

Rollup of 8 pull requests #141232

Uh oh!

fmease commented May 18, 2025

Uh oh!

fmease commented May 18, 2025

Uh oh!

bors commented May 18, 2025

Uh oh!

bors commented May 18, 2025

Uh oh!

bors commented May 18, 2025

Uh oh!

Uh oh!

rust-timer commented May 18, 2025

Uh oh!

github-actions bot commented May 18, 2025

Stage 1

Stage 2

Uh oh!

rust-timer commented May 18, 2025

Uh oh!

Kobzol commented May 20, 2025

Uh oh!

Uh oh!

Rollup of 8 pull requests #141232

Rollup of 8 pull requests #141232

Uh oh!

Conversation

fmease commented May 18, 2025

Uh oh!

fmease commented May 18, 2025

Uh oh!

bors commented May 18, 2025

Uh oh!

bors commented May 18, 2025

Uh oh!

bors commented May 18, 2025

Uh oh!

Uh oh!

rust-timer commented May 18, 2025

Uh oh!

github-actions bot commented May 18, 2025

Test differences

Stage 1

Stage 2

Job duration changes

Uh oh!

rust-timer commented May 18, 2025

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

Instruction count

Max RSS (memory usage)

Cycles

Binary size

Uh oh!

Kobzol commented May 20, 2025

Uh oh!

Uh oh!