Update LLVM submodule

[dianqk]

Fixes #149250.

Update LLVM to 21.1.7 with some 21.1.8 patches. These patches have been backported to release/21.x.

[rustbot]

r? @cuviper

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[rustbot]

⚠️ Warning ⚠️

• Some commits in this PR modify submodules.

  If this was not intentional, see I changed a submodule on accident in the rustc dev guide.

[dianqk]

cc @inkreasing (rust-lang/llvm-project#192)

[cuviper]

@bors r+ rollup=never

[bors]

📌 Commit c923dc3 has been approved by cuviper

It is now in the queue for this repository.

[bors]

⌛ Testing commit c923dc3 with merge 693f365...

[bors]

☀️ Test successful - checks-actions
Approved by: cuviper
Pushing 693f365 to main...

[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 52fda2e (parent) -> 693f365 (this PR)

Test differences

Show 21 test diffs

Stage 1

• [codegen] tests/codegen-llvm/deduced-param-attrs.rs#LLVM20: ignore (ignored when the LLVM version (21.1.5) is newer than majorversion 20) -> ignore (ignored when the LLVM version (21.1.8) is newer than majorversion 20) (J1)
• [codegen] tests/codegen-llvm/enum/enum-discriminant-eq.rs#LLVM20: ignore (ignored when the LLVM version (21.1.5) is newer than majorversion 20) -> ignore (ignored when the LLVM version (21.1.8) is newer than majorversion 20) (J1)
• [codegen] tests/codegen-llvm/issues/issue-122600-ptr-discriminant-update.rs#new: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J1)
• [codegen] tests/codegen-llvm/simd-intrinsic/simd-intrinsic-generic-gather.rs#LLVM22: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J1)
• [codegen] tests/codegen-llvm/simd-intrinsic/simd-intrinsic-generic-masked-load.rs#LLVM22: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J1)
• [codegen] tests/codegen-llvm/simd-intrinsic/simd-intrinsic-generic-masked-store.rs#LLVM22: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J1)
• [codegen] tests/codegen-llvm/simd-intrinsic/simd-intrinsic-generic-scatter.rs#LLVM22: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J1)
• [codegen] tests/codegen-llvm/vec_pop_push_noop.rs#new: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J1)
• [codegen] tests/codegen-llvm/vecdeque_pop_push.rs#new: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J1)

Stage 2

• [assembly] tests/assembly-llvm/nvptx-safe-naming.rs#LLVM20: ignore (ignored when the LLVM version (21.1.5) is newer than majorversion 20) -> ignore (ignored when the LLVM version (21.1.8) is newer than majorversion 20) (J0)
• [codegen] tests/codegen-llvm/deduced-param-attrs.rs#LLVM20: ignore (ignored when the LLVM version (21.1.5) is newer than majorversion 20) -> ignore (ignored when the LLVM version (21.1.8) is newer than majorversion 20) (J0)
• [codegen] tests/codegen-llvm/enum/enum-discriminant-eq.rs#LLVM20: ignore (ignored when the LLVM version (21.1.5) is newer than majorversion 20) -> ignore (ignored when the LLVM version (21.1.8) is newer than majorversion 20) (J0)
• [codegen] tests/codegen-llvm/issues/issue-122600-ptr-discriminant-update.rs#new: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J0)
• [codegen] tests/codegen-llvm/simd-intrinsic/simd-intrinsic-generic-gather.rs#LLVM22: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J0)
• [codegen] tests/codegen-llvm/simd-intrinsic/simd-intrinsic-generic-masked-load.rs#LLVM22: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J0)
• [codegen] tests/codegen-llvm/simd-intrinsic/simd-intrinsic-generic-masked-store.rs#LLVM22: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J0)
• [codegen] tests/codegen-llvm/simd-intrinsic/simd-intrinsic-generic-scatter.rs#LLVM22: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J0)
• [codegen] tests/codegen-llvm/vec_pop_push_noop.rs#new: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J0)
• [codegen] tests/codegen-llvm/vecdeque_pop_push.rs#new: ignore (ignored when the LLVM version 21.1.5 is older than 22.0.0) -> ignore (ignored when the LLVM version 21.1.8 is older than 22.0.0) (J0)
• [ui] tests/ui/sanitizer/kcfi-arity-requires-llvm-21-0-0.rs: ignore (ignored when the LLVM version (21.1.5) is newer than majorversion 20) -> ignore (ignored when the LLVM version (21.1.8) is newer than majorversion 20) (J2)
• [run-make] tests/run-make/compressed-debuginfo-zstd: pass -> ignore (ignored if LLVM wasn't build with zstd for ELF section compression or LLVM is not the default codegen backend) (J3)

Job group index

• J0: aarch64-apple, aarch64-gnu, aarch64-msvc-1, arm-android, armhf-gnu, dist-i586-gnu-i586-i686-musl, i686-gnu-1, i686-gnu-nopt-1, i686-msvc-1, test-various, x86_64-gnu, x86_64-gnu-nopt, x86_64-gnu-stable, x86_64-mingw-1, x86_64-msvc-1
• J1: pr-check-2
• J2: aarch64-apple, aarch64-gnu, aarch64-msvc-1, arm-android, armhf-gnu, dist-i586-gnu-i586-i686-musl, i686-gnu-1, i686-gnu-nopt-1, i686-msvc-1, test-various, x86_64-gnu, x86_64-gnu-debug, x86_64-gnu-gcc, x86_64-gnu-nopt, x86_64-gnu-stable, x86_64-mingw-1, x86_64-msvc-1
• J3: x86_64-gnu-nopt

Test dashboard

Run

cargo run --manifest-path src/ci/citool/Cargo.toml -- \
    test-dashboard 693f365667a97b24cb40173bc2801eb66ea53020 --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-arm-linux-musl: 5435.5s -> 16771.4s (+208.6%)
2. dist-x86_64-solaris: 5322.6s -> 15277.3s (+187.0%)
3. dist-sparcv9-solaris: 4862.0s -> 13888.7s (+185.7%)
4. dist-x86_64-illumos: 6178.0s -> 16147.2s (+161.4%)
5. pr-check-1: 1843.9s -> 4614.3s (+150.3%)
6. dist-android: 1575.9s -> 3899.8s (+147.5%)
7. dist-x86_64-apple: 7149.7s -> 17609.7s (+146.3%)
8. dist-apple-various: 3327.3s -> 7815.3s (+134.9%)
9. dist-ohos-x86_64: 4041.1s -> 9438.2s (+133.6%)
10. dist-x86_64-freebsd: 4601.5s -> 10663.9s (+131.7%)

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]

Finished benchmarking commit (693f365): 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)

Results (primary 2.1%, secondary 0.8%)

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

	mean	range	count
Regressions ❌ (primary)	2.1%	[1.7%, 2.5%]	2
Regressions ❌ (secondary)	0.8%	[0.8%, 0.8%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	2.1%	[1.7%, 2.5%]	2

Cycles

Results (primary 4.2%, secondary 16.2%)

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

	mean	range	count
Regressions ❌ (primary)	4.2%	[2.7%, 5.4%]	7
Regressions ❌ (secondary)	19.7%	[5.8%, 32.2%]	11
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.8%	[-2.9%, -2.7%]	2
All ❌✅ (primary)	4.2%	[2.7%, 5.4%]	7

Binary size

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

Bootstrap: 479.867s -> 480.53s (0.14%)
Artifact size: 390.23 MiB -> 390.23 MiB (-0.00%)