llvm-wrapper: adapt for LLVM API changes

[krasimirgg]

Adapts the wrapper for llvm/llvm-project@516e301, where the constructor of PGOOptions gained a new FileSystem argument. Adapted to use the real file system, similarly to the changes inside of LLVM:
llvm/llvm-project@516e301#diff-f409934ba27ad86494f3012324e9a3995b56e0743609ded7a387ba62bbf5edb0R236

Found via our experimental Rust + LLVM at HEAD bot: https://buildkite.com/llvm-project/rust-llvm-integrate-prototype/builds/16853#01860e2e-5eba-4f07-8359-0325913ff410/219-517

[rustbot]

r? @cuviper

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[krasimirgg]

@rustbot label: +llvm-main

[cuviper]

@bors r+ rollup

[bors]

📌 Commit 4614e5b has been approved by cuviper

It is now in the queue for this repository.

[bors]

⌛ Testing commit 4614e5b with merge 91eb6f9...

[bors]

☀️ Test successful - checks-actions
Approved by: cuviper
Pushing 91eb6f9 to master...

[rust-timer]

Finished benchmarking commit (91eb6f9): comparison URL.

Overall result: ✅ improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.7%	[-0.8%, -0.6%]	4
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results

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
Regressions ❌ (secondary)	2.1%	[2.1%, 2.1%]	1
Improvements ✅ (primary)	-2.9%	[-3.4%, -2.4%]	2
Improvements ✅ (secondary)	-2.7%	[-3.7%, -2.1%]	19
All ❌✅ (primary)	-2.9%	[-3.4%, -2.4%]	2

Cycles

Results

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)	0.8%	[0.8%, 0.8%]	1
Regressions ❌ (secondary)	1.8%	[1.6%, 2.1%]	5
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.8%	[0.8%, 0.8%]	1