Add codegen test for array comparision opt

[tesuji]

Fixed since rust 1.55
closes #62531

[rustbot]

r? @Mark-Simulacrum

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[nikic]

Can you please make this an IR test instead (tests/codegen)? There should be no need for an assembly test here. Then it will work on non-x86 as well.

[nikic]

@bors r+

[bors]

📌 Commit 422de35 has been approved by nikic

It is now in the queue for this repository.

[matthiaskrgr]

@bors r-
#125344 (comment)

[nikic]

@bors r+ rollup=iffy

[bors]

📌 Commit e7d6da3 has been approved by nikic

It is now in the queue for this repository.

[bors]

⌛ Testing commit e7d6da3 with merge 1d0e4af...

[bors]

☀️ Test successful - checks-actions
Approved by: nikic
Pushing 1d0e4af to master...

[rust-timer]

Finished benchmarking commit (1d0e4af): comparison URL.

Overall result: ❌✅ regressions and 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)	1.1%	[1.1%, 1.1%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-1.4%	[-1.4%, -1.4%]	1
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results (primary 3.7%, secondary 4.8%)

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)	3.7%	[3.7%, 3.7%]	1
Regressions ❌ (secondary)	4.8%	[4.8%, 4.8%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	3.7%	[3.7%, 3.7%]	1

Cycles

Results (primary 2.6%)

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)	2.6%	[2.6%, 2.6%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	2.6%	[2.6%, 2.6%]	1

Binary size

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

Bootstrap: 670.228s -> 670.966s (0.11%)
Artifact size: 316.14 MiB -> 315.42 MiB (-0.23%)