pattern_analysis: Move constructor selection logic to PlaceInfo

[Nadrieril]

This is a small refactor PR. There was a dense bit of constructor-related logic in compute_exhaustiveness_and_usefulness. I'm moving it out into a PlaceInfo method to make it easier to follow both separately. I also have plans that will complicate it further so it's good that it's somewhat encapsulated.

r? @compiler-errors

[compiler-errors]

@bors r+

[bors]

📌 Commit 778c7e1 has been approved by compiler-errors

It is now in the queue for this repository.

[bors]

⌛ Testing commit 778c7e1 with merge bcea3cb...

[bors]

☀️ Test successful - checks-actions
Approved by: compiler-errors
Pushing bcea3cb to master...

[rust-timer]

Finished benchmarking commit (bcea3cb): 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)	-1.8%	[-1.9%, -1.7%]	6
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)	6.5%	[6.5%, 6.5%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.8%	[-4.0%, -1.7%]	2
All ❌✅ (primary)	-	-	0

Binary size

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)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.2%	[-0.2%, -0.2%]	1
All ❌✅ (primary)	-	-	0

Bootstrap: 638.786s -> 639.837s (0.16%)
Artifact size: 308.61 MiB -> 308.63 MiB (0.01%)