[PERF] dont represent infer vars two different ways in hir visitors

[BoxyUwU]

to lampshade a bit for anyone who decides to review a draft PR: yes this is not very a good PR right now

[rustbot]

r? @fmease

rustbot has assigned @fmease.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

[BoxyUwU]

sry fmease
r? @ghost

[rustbot]

Failed to set assignee to ghost: invalid assignee

Note: Only org members with at least the repository "read" role, users with write permissions, or people who have commented on the PR may be assigned.

[BoxyUwU]

@bors try @rust-timer queue

[bors]

⌛ Trying commit c19e8c3 with merge 397cf05...

[bors]

💔 Test failed - checks-actions

[BoxyUwU]

@bors try @rust-timer queue

[bors]

⌛ Trying commit d53cf04 with merge 9ce13d8...

[bors]

☀️ Try build successful - checks-actions
Build commit: 9ce13d8 (9ce13d8853ff501c75672ba2b97a12ad6b00251e)

[rust-timer]

Finished benchmarking commit (9ce13d8): comparison URL.

Overall result: ❌ regressions - no action needed

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. While you can manually mark this PR as fit for rollup, we strongly recommend not doing so since this PR may lead to changes in compiler perf.

@bors rollup=never
@rustbot label: -S-waiting-on-perf -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)	0.3%	[0.3%, 0.3%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (secondary -3.6%)

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.6%	[-3.6%, -3.6%]	1
All ❌✅ (primary)	-	-	0

Cycles

Results (primary 4.3%)

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)	4.3%	[3.4%, 7.4%]	15
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	4.3%	[3.4%, 7.4%]	15

Binary size

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

Bootstrap: 764.798s -> 764.043s (-0.10%)
Artifact size: 325.77 MiB -> 325.78 MiB (0.00%)

[BoxyUwU]

yippee