Relax r29 inline asm restriction on PowerPC64 targets

[pmur]

LLVM uses r29 to hold a base pointer for some PowerPC target configurations. It is usable on all 64 bit targets as a callee save register.

r? @Amanieu

[Amanieu]

@bors r+ rollup

[bors]

📌 Commit 5f6fa96 has been approved by Amanieu

It is now in the queue for this repository.

[bors]

⌛ Testing commit 5f6fa96 with merge 53efb3d...

[bors]

☀️ Test successful - checks-actions
Approved by: Amanieu
Pushing 53efb3d to master...

[github-actions]

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 8e0b68e (parent) -> 53efb3d (this PR)

Test differences

Show 2 test diffs

2 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 53efb3d4f3b67d189a0c72eb475a52017d79d609 --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

1. dist-x86_64-illumos: 5861.8s -> 8519.4s (+45.3%)
2. dist-i686-linux: 6236.2s -> 7648.3s (+22.6%)
3. x86_64-rust-for-linux: 2646.7s -> 3070.8s (+16.0%)
4. dist-ohos-aarch64: 4251.8s -> 4864.6s (+14.4%)
5. dist-aarch64-msvc: 5306.9s -> 6051.0s (+14.0%)
6. pr-check-1: 1821.6s -> 1575.7s (-13.5%)
7. dist-x86_64-apple: 7005.7s -> 7866.2s (+12.3%)
8. dist-x86_64-freebsd: 5047.5s -> 5663.0s (+12.2%)
9. dist-i586-gnu-i586-i686-musl: 4844.3s -> 5360.2s (+10.6%)
10. dist-ohos-x86_64: 4331.3s -> 4782.2s (+10.4%)

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]

Finished benchmarking commit (53efb3d): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

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

Max RSS (memory usage)

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

Cycles

Results (primary -0.0%, secondary 7.5%)

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

	mean	range	count
Regressions ❌ (primary)	2.1%	[2.1%, 2.1%]	1
Regressions ❌ (secondary)	7.5%	[7.5%, 7.5%]	1
Improvements ✅ (primary)	-2.1%	[-2.1%, -2.1%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.0%	[-2.1%, 2.1%]	2

Binary size

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

Bootstrap: 475.57s -> 473.384s (-0.46%)
Artifact size: 390.76 MiB -> 390.72 MiB (-0.01%)