Rollup of 5 pull requests by JonathanBrouwer · Pull Request #164826 · rust-lang/rust

JonathanBrouwer · 2026-10-23T22:49:37Z

Successful merges:

Outline constant messages from panicking macros #163766 (Outline constant messages from panicking macros)
Add extra unchecked_disjoint_bitor implementations. #147368 (Add extra unchecked_disjoint_bitor implementations.)
Use 64-bit futex syscalls on RV32 Linux #164748 (Use 64-bit futex syscalls on RV32 Linux)
powerpc: implement c-variadic correctly for softfloat targets #164520 (powerpc: implement c-variadic correctly for softfloat targets)
add maintainers for tier 2 riscv64 targets (baremetal only) #164671 (add maintainers for tier 2 riscv64 targets (baremetal only))

This emits (very slightly) less code per call site because it's passing one less argument (the implicit caller location is still passed).

…'i64', 'i128', and 'isize'; Update existing 'unchecked_disjoint_bitor' docs; Add 'must_use' to 'unchecked_disjoint_bitor';

…s, r=ChrisDenton Outline constant messages from panicking macros This emits (very slightly) less code per call site because it's passing one less argument (the implicit caller location is still passed). Inspired by rust-lang#163657

Add extra `unchecked_disjoint_bitor` implementations. Tracking issue: rust-lang#135758. This PR implements the `unchecked_disjoint_bitor` method for additional types: ```rust impl bool { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl i8 { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl i16 { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl i32 { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl i64 { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl i128 { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl isize { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } ``` Our `disjoint_bitor` intrinsic is already implemented for these types. This method specifically is also already present on unsigned, integral types. Additionally, this PR rewrites the existing docs for `unchecked_disjoint_bitor` and adds the `must_use` attribute to the method.

Use 64-bit futex syscalls on RV32 Linux Closes rust-lang#164694 This changes riscv32 Linux targets to use the `SYS_futex_time64` syscall instead of `SYS_futex` in the standard library to fix compilation after rust-lang/libc#5455. `libc::timespec` has a `c_long` for nanoseconds on 32-bit targets right now, whereas the kernel uses `long long`. I'm not sure whether this is a problem or not? I'm also curious whether using the time64 syscall on _all_ 32-bit targets is a desired change. r? tgross35

…float, r=beetrees powerpc: implement c-variadic correctly for softfloat targets We don't currently have any softfloat powerpc targets, but rust-lang#160575 aims to add them. We do have several SPE targets, which in terms of ABI are softfloat.

add maintainers for tier 2 riscv64 targets (baremetal only) As per rust-lang#113739, I (on behalf of the RISC-V embedded team) am adding official maintainers for tier2 baremetal riscv64 targets. r? tgross35

JonathanBrouwer · 2026-10-23T22:49:54Z

@bors r+ p=5 force

Trying commonly failed jobs
@bors try jobs=dist-various-1,test-various,test-x86_64-gnu-aux,test-x86_64-msvc-1,test-aarch64-apple-1,test-aarch64-apple-2,test-x86_64-mingw-1,test-i686-msvc,test-armhf-gnu,test-x86_64-gnu-llvm-22-3

rust-bors · 2026-10-23T22:49:58Z

📌 Commit 6ba97f9 has been approved by JonathanBrouwer

It is now in the queue for this repository.

Rollup of 5 pull requests try-job: dist-various-1 try-job: test-various try-job: test-x86_64-gnu-aux try-job: test-x86_64-msvc-1 try-job: test-aarch64-apple-1 try-job: test-aarch64-apple-2 try-job: test-x86_64-mingw-1 try-job: test-i686-msvc try-job: test-armhf-gnu try-job: test-x86_64-gnu-llvm-22-3

rust-bors · 2026-10-24T01:43:18Z

☀️ Try build successful (CI)
Build commit: 9843737 (9843737f9c5bb208eb66ab9e9feb06ba79f91ee2)
Base parent: 48f4b05 (48f4b05538b8eca412137042d9647a61e692c6b3)

rust-bors · 2026-10-24T05:17:37Z

☀️ Test successful - CI
Approved by: JonathanBrouwer
Duration: 3h 24m 13s
Pushing 34228cf to main...

github-actions · 2026-10-24T05:20:51Z

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 9cd159c (parent) -> 34228cf (this PR)

Test differences

Show 4782 test diffs

Stage 1

[assembly] tests/assembly-llvm/c-variadic/powerpc.rs#SPE: [missing] -> pass (J1)

Stage 2

[assembly] tests/assembly-llvm/c-variadic/powerpc.rs#SPE: [missing] -> pass (J0)

Additionally, 4780 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 34228cf7f5bdd08d320dedf008b8995dd3e743e2 --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

test-x86_64-gnu-parallel-frontend: 1h 12m -> 2h 2m (+69.2%)
test-x86_64-rust-for-linux: 35m 30s -> 59m 55s (+68.8%)
dist-arm-linux-musl: 1h 7m -> 1h 49m (+62.7%)
test-x86_64-gnu-stdlib-semver-check: 11m 22s -> 18m 10s (+59.8%)
dist-x86_64-freebsd: 58m 24s -> 1h 33m (+59.5%)
test-x86_64-msvc-ext3: 1h 13m -> 1h 54m (+56.2%)
dist-loongarch64-linux: 1h 22m -> 2h 5m (+51.7%)
test-armhf-gnu: 1h 8m -> 1h 41m (+46.9%)
test-x86_64-gnu-llvm-22-2: 1h 8m -> 1h 40m (+46.5%)
dist-i686-mingw: 59m 16s -> 34m 30s (-41.8%)

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 · 2026-10-24T06:08:28Z

Finished benchmarking commit (34228cf): comparison URL.

Overall result: ❌✅ regressions and improvements - no action needed

@rustbot label: -perf-regression

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
Regressions ❌ (secondary)	0.3%	[0.3%, 0.3%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.2%	[-0.4%, -0.1%]	6
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary 0.1%, secondary -1.0%)

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

	mean	range	count
Regressions ❌ (primary)	1.0%	[0.4%, 1.7%]	6
Regressions ❌ (secondary)	3.2%	[3.2%, 3.2%]	1
Improvements ✅ (primary)	-0.8%	[-1.3%, -0.6%]	6
Improvements ✅ (secondary)	-2.1%	[-6.8%, -0.4%]	4
All ❌✅ (primary)	0.1%	[-1.3%, 1.7%]	12

Cycles

Results (primary 0.5%, secondary -0.9%)

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

	mean	range	count
Regressions ❌ (primary)	1.1%	[0.4%, 3.0%]	10
Regressions ❌ (secondary)	2.2%	[1.5%, 2.8%]	2
Improvements ✅ (primary)	-0.8%	[-1.2%, -0.4%]	4
Improvements ✅ (secondary)	-2.5%	[-7.6%, -0.7%]	4
All ❌✅ (primary)	0.5%	[-1.2%, 3.0%]	14

Binary size

Results (primary -0.1%, secondary -1.1%)

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)	-	-	0
Improvements ✅ (primary)	-0.1%	[-0.3%, -0.0%]	27
Improvements ✅ (secondary)	-1.1%	[-4.8%, -0.0%]	25
All ❌✅ (primary)	-0.1%	[-0.3%, -0.0%]	27

Bootstrap: 487.866s -> 487.793s (-0.01%)
Artifact size: 406.30 MiB -> 406.20 MiB (-0.03%)

rust-bors · 2026-10-24T06:22:53Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#163766	Outline constant messages from panicking macros	`72e249924e781ea2b1c32b26803297cc06168dbd` (link)
#147368	Add extra `unchecked_disjoint_bitor` implementations.	`7eb3fbfa47f5927fc29855fa5fccf736c4136b9a` (link)
#164748	Use 64-bit futex syscalls on RV32 Linux	`3b4de1d57caf0f669422276781cf876324eda1d3` (link)
#164520	powerpc: implement c-variadic correctly for softfloat targe…	`a971c39e4706de070e2b325c70fff28ef671e606` (link)
#164671	add maintainers for tier 2 riscv64 targets (baremetal only)	`f35c83f1e9cbf7e997e3a38a9676c507f4383104` (link)

parent commit: 9cd159cfa5

In the case of a perf regression, run the following command with the SHAs of each PR you suspect might be the cause: @rust-timer triage $SHA $SHA $SHA..., or run @rust-timer triage all to benchmark all rollup members.

hanna-kruppe and others added 11 commits October 10, 2026 19:48

Outline constant messages from panicking macros

400b05d

This emits (very slightly) less code per call site because it's passing one less argument (the implicit caller location is still passed).

Use 64-bit time for futex syscalls on RV32

c860e0d

add maintainers for tier 2 riscv64 targets (baremetal only)

e18ee63

fix: update rustix to version compatible with latest libc

093a6f1

Add 'unchecked_disjoint_bitor' method to 'bool', 'i8', 'i16', 'i32', …

d42b8ca

…'i64', 'i128', and 'isize'; Update existing 'unchecked_disjoint_bitor' docs; Add 'must_use' to 'unchecked_disjoint_bitor';

powerpc: support softfloat with c-variadic functions

c84e3ef

Rollup merge of rust-lang#164671 - romancardenas:main, r=tgross35

6ba97f9

add maintainers for tier 2 riscv64 targets (baremetal only) As per rust-lang#113739, I (on behalf of the RISC-V embedded team) am adding official maintainers for tier2 baremetal riscv64 targets. r? tgross35

rust-bors Bot added the rollup A PR which is a rollup label Oct 23, 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 Oct 23, 2026

This comment has been minimized.

Sign in to view

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 Oct 24, 2026

rust-bors Bot merged commit 34228cf into rust-lang:main Oct 24, 2026
16 checks passed

rustbot added this to the 1.101.0 milestone Oct 24, 2026

rust-bors Bot mentioned this pull request Oct 24, 2026

Implement the MCP 1022: Promote riscv64a23-unknown-linux-gnu to Tier 2 With host tools #161635

Draft

Navigation Menu

Repository navigation

Rollup of 5 pull requests - #164826

Rollup of 5 pull requests#164826
rust-bors[bot] merged 11 commits into
rust-lang:mainfrom
JonathanBrouwer:rollup-jxYrOGV

JonathanBrouwer commented Oct 23, 2026

Uh oh!

JonathanBrouwer commented Oct 23, 2026

Uh oh!

rust-bors Bot commented Oct 23, 2026

Uh oh!

This comment has been minimized.

rust-bors Bot commented Oct 24, 2026

Uh oh!

This comment has been minimized.

rust-bors Bot commented Oct 24, 2026

Uh oh!

Uh oh!

github-actions Bot commented Oct 24, 2026

Stage 1

Stage 2

Uh oh!

rust-timer commented Oct 24, 2026

Uh oh!

rust-bors Bot commented Oct 24, 2026

Uh oh!

Reviewers

Uh oh!

Assignees

Labels

Projects

Milestone

Development

Uh oh!

8 participants

Conversation

JonathanBrouwer commented Oct 23, 2026

Uh oh!

JonathanBrouwer commented Oct 23, 2026

Uh oh!

rust-bors Bot commented Oct 23, 2026

Uh oh!

This comment has been minimized.

rust-bors Bot commented Oct 24, 2026

Uh oh!

This comment has been minimized.

rust-bors Bot commented Oct 24, 2026

Uh oh!

Uh oh!

github-actions Bot commented Oct 24, 2026

Test differences

Stage 1

Stage 2

Job duration changes

Uh oh!

rust-timer commented Oct 24, 2026

Overall result: ❌✅ regressions and improvements - no action needed

Instruction count

Max RSS (memory usage)

Cycles

Binary size

Uh oh!

rust-bors Bot commented Oct 24, 2026

Uh oh!

Reviewers

Uh oh!

Assignees

Labels

Projects

Milestone

Development

Uh oh!

8 participants