Update LLVM to 19.1.4

[Earlopain]

Fixes #125619

r? @DianQK

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @DianQK (or someone else) some time within the next two weeks.

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[rustbot]

⚠️ Warning ⚠️

• These commits modify submodules.

[DianQK]

Thanks!
@bors r+ rollup=never

[bors]

📌 Commit a4bd570 has been approved by DianQK

It is now in the queue for this repository.

[DianQK]

Data race with bors?

[bors]

⌛ Testing commit a4bd570 with merge 318f96a...

[bors]

☀️ Test successful - checks-actions
Approved by: DianQK
Pushing 318f96a to master...

[rust-timer]

Finished benchmarking commit (318f96a): 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)	1.5%	[1.5%, 1.5%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary 2.0%, secondary 0.1%)

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)	2.0%	[1.0%, 2.5%]	5
Regressions ❌ (secondary)	3.1%	[3.1%, 3.1%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.9%	[-2.9%, -2.9%]	1
All ❌✅ (primary)	2.0%	[1.0%, 2.5%]	5

Cycles

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

Binary size

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

Bootstrap: 796.378s -> 797.091s (0.09%)
Artifact size: 335.91 MiB -> 335.93 MiB (0.01%)