Update LLVM submodule

[nikic]

Update to current release/23.x, which is a bit past the LLVM 23.1.0 release.

Fixes #161336.

[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.

[nikic]

Beta nomination includes the previous update in #161466 as well. The LLVM 23 version on beta is very old at this point (I think from around rc1), and a lot of issues have since been fixed. We should avoid shipping pre-release LLVM on beta.

[nikic]

@bors try @rust-timer queue

[rust-bors]

☀️ Try build successful (CI)
Build commit: fbd8c6c (fbd8c6cda15a2ca65dba0cfec46946092069d7a8)
Base parent: a433023 (a4330234a776684c36428d001721d0320d24dd77)

[rust-timer]

Finished benchmarking commit (fbd8c6c): comparison URL.

Overall result: ❌ regressions - no action needed

Benchmarking means the PR may be perf-sensitive. Consider adding rollup=never if this change is not fit for rolling up.

@rustbot label: -S-waiting-on-perf -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
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

This perf run didn't have relevant results for this metric.

Cycles

Results (primary 0.8%, secondary -2.2%)

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

	mean	range	count
Regressions ❌ (primary)	2.2%	[1.6%, 2.9%]	2
Regressions ❌ (secondary)	6.0%	[3.9%, 8.1%]	2
Improvements ✅ (primary)	-2.0%	[-2.0%, -2.0%]	1
Improvements ✅ (secondary)	-5.0%	[-7.2%, -2.7%]	6
All ❌✅ (primary)	0.8%	[-2.0%, 2.9%]	3

Binary size

This perf run didn't have relevant results for this metric.

Bootstrap: 473.301s -> 475.129s (0.39%)
Artifact size: 400.69 MiB -> 402.63 MiB (0.48%)

[cuviper]

@bors r+

[rust-bors]

📌 Commit 8e6d69e has been approved by cuviper

It is now in the queue for this repository.

[JonathanBrouwer]

@bors rollup=never
Hmmm I don't think we should be rolling up LLVM updates, because of

May cause unclear regressions

Is otherwise dangerous to rollup: LLVM or code generation

https://forge.rust-lang.org/compiler/reviews.html#rollups

[tgross35]

@bors p=1 submodule