Update to LLVM 20.1.4

[nikic]

Fixes https://rust-lang.zulipchat.com/#narrow/channel/122651-general/topic/Why.20is.20the.20compiler.20failing.20on.20below.20code.3F.

[rustbot]

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[rustbot]

⚠️ Warning ⚠️

• Some commits in this PR modify submodules.

[dianqk]

@bors r+ rollup=never

[bors]

📌 Commit 146d8b9 has been approved by dianqk

It is now in the queue for this repository.

[bors]

⌛ Testing commit 146d8b9 with merge d6a325d...

[bors]

☀️ Test successful - checks-actions
Approved by: dianqk
Pushing d6a325d 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 097cd98 (parent) -> d6a325d (this PR)

Test differences

Show 9 test diffs

Stage 2

• [assembly] tests/assembly/riscv-soft-abi-with-float-features.rs#LLVM-PRE-20: ignore (ignored when the LLVM version (20.1.2) is newer than majorversion 19) -> ignore (ignored when the LLVM version (20.1.4) is newer than majorversion 19) (J0)
• [assembly] tests/assembly/sanitizer/kcfi/emit-arity-indicator.rs#x86_64: ignore (ignored when the LLVM version 20.1.2 is older than 21.0.0) -> ignore (ignored when the LLVM version 20.1.4 is older than 21.0.0) (J0)
• [assembly] tests/assembly/x86_64-bigint-helpers.rs#llvm-pre-20: ignore (ignored when the LLVM version (20.1.2) is newer than majorversion 19) -> ignore (ignored when the LLVM version (20.1.4) is newer than majorversion 19) (J0)
• [codegen] tests/codegen/integer-cmp.rs#llvm-pre-20: ignore (ignored when the LLVM version (20.1.2) is newer than majorversion 19) -> ignore (ignored when the LLVM version (20.1.4) is newer than majorversion 19) (J0)
• [codegen] tests/codegen/issues/issue-101082.rs#x86-64-v3: ignore (ignored when the LLVM version 20.1.2 is older than 21.0.0) -> ignore (ignored when the LLVM version 20.1.4 is older than 21.0.0) (J0)
• [codegen] tests/codegen/sanitizer/kcfi/add-kcfi-arity-flag.rs#x86_64: ignore (ignored when the LLVM version 20.1.2 is older than 21.0.0) -> ignore (ignored when the LLVM version 20.1.4 is older than 21.0.0) (J0)
• [run-make] tests/run-make/compressed-debuginfo-zstd: pass -> ignore (ignored if LLVM wasn't build with zstd for ELF section compression (we want LLVM/LLD to be built with zstd support)) (J1)
• [assembly] tests/assembly/x86_64-cmp.rs#LLVM-PRE-20-DEBUG: ignore (ignored when the LLVM version (20.1.2) is newer than majorversion 19) -> ignore (ignored when the LLVM version (20.1.4) is newer than majorversion 19) (J2)
• [assembly] tests/assembly/x86_64-cmp.rs#LLVM-PRE-20-OPTIM: ignore (ignored when the LLVM version (20.1.2) is newer than majorversion 19) -> ignore (ignored when the LLVM version (20.1.4) is newer than majorversion 19) (J2)

Job group index

• J0: aarch64-apple, aarch64-gnu, arm-android, armhf-gnu, dist-i586-gnu-i586-i686-musl, i686-gnu-1, i686-gnu-nopt-1, i686-msvc-1, test-various, x86_64-apple-1, x86_64-gnu, x86_64-gnu-nopt, x86_64-gnu-stable, x86_64-mingw-1, x86_64-msvc-1
• J1: x86_64-gnu-nopt
• J2: test-various, x86_64-apple-1, x86_64-gnu, x86_64-gnu-nopt, x86_64-gnu-stable, x86_64-mingw-1, x86_64-msvc-1

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard d6a325d93a84077580c677f89affbe45682606c3 --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: 5622.3s -> 14239.3s (153.3%)
2. dist-arm-linux: 4808.6s -> 10000.7s (108.0%)
3. dist-x86_64-musl: 7277.4s -> 15084.3s (107.3%)
4. dist-x86_64-freebsd: 4845.2s -> 10023.2s (106.9%)
5. dist-ohos: 10773.7s -> 20372.4s (89.1%)
6. x86_64-gnu-debug: 5960.6s -> 11213.5s (88.1%)
7. x86_64-rust-for-linux: 2748.7s -> 5104.2s (85.7%)
8. dist-android: 2460.0s -> 4539.7s (84.5%)
9. arm-android: 5348.5s -> 9217.1s (72.3%)
10. mingw-check: 1295.3s -> 2222.6s (71.6%)

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]

Finished benchmarking commit (d6a325d): comparison URL.

Overall result: ❌ regressions - no action needed

@rustbot label: -perf-regression

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

Max RSS (memory usage)

Results (primary -0.4%, secondary 4.3%)

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)	1.1%	[0.4%, 3.8%]	9
Regressions ❌ (secondary)	4.3%	[4.3%, 4.3%]	1
Improvements ✅ (primary)	-3.2%	[-6.9%, -0.5%]	5
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.4%	[-6.9%, 3.8%]	14

Cycles

Results (primary -0.4%, secondary -1.7%)

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)	0.5%	[0.4%, 0.5%]	3
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.7%	[-0.9%, -0.4%]	13
Improvements ✅ (secondary)	-1.7%	[-1.7%, -1.7%]	1
All ❌✅ (primary)	-0.4%	[-0.9%, 0.5%]	16

Binary size

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

Bootstrap: 768.722s -> 768.719s (-0.00%)
Artifact size: 365.56 MiB -> 365.55 MiB (-0.00%)