Use llvm-config instead of download-ci-llvm in PGO script

[Kobzol]

This should avoid CI breakage when the LLVM stamp is updated, and also it will avoid an unnecessary LLVM download from CI.

r? @jyn514

[jyn514]

@bors r+

[bors]

📌 Commit be99bb9 has been approved by jyn514

It is now in the queue for this repository.

[Kobzol]

I'll also start a try build, we should see in ~hour if it works, to avoid an unnecessarily failed merge.

@bors try

[bors]

🙅 Please do not try after a pull request has been r+ed. If you need to try, unapprove (r-) it first.

[Kobzol]

Ok, apparently I will not.

[jyn514]

@bors rollup=iffy

[Noratrieb]

🙅 Please do not try after a pull request has been r+ed. If you need to try, unapprove (r-) it first.

For context, bors has a funny bug where it insta pushes a PR to master if you r+ during a try build.

Oh nevermind, this is older than knowledge of the bug, this appears to be a normal message. Interesting.

[bors]

⌛ Testing commit be99bb9 with merge 3561b7a159440a6c68521b4f328c88750bc69945...

[bors]

💔 Test failed - checks-actions

[Kobzol]

@rustbot ready

I realized that by default the tests won't run in a try build, so we might as well just retry the merge.

[Kobzol]

@bors r=jyn514

[bors]

📌 Commit 12b75fe has been approved by jyn514

It is now in the queue for this repository.

[bors]

⌛ Testing commit 12b75fe with merge c4c84df...

[bors]

☀️ Test successful - checks-actions
Approved by: jyn514
Pushing c4c84df to master...

[rust-timer]

Finished benchmarking commit (c4c84df): 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

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)	3.3%	[2.5%, 4.0%]	2
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	3.3%	[2.5%, 4.0%]	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
Regressions ❌ (secondary)	2.8%	[2.2%, 3.5%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Binary size

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

Bootstrap: 656.625s -> 657.995s (0.21%)