Use default_field_values in Resolver

[estebank]

Change Resolver to use feature(default_field_values). This change is non-exhaustive, as fields may have been added since I made this commit, and Fx(Index/Hash)(Map/Set) types would need to have a const constructable to change the majority of the fields left over.

Using default field values should make it easier to review when we add or remove fields to Resolver in the future, and highlight which fields are run-time dependent in Resolver::new.

r? @petrochenkov

[petrochenkov]

Thanks!
@bors r+ rollup

[bors]

📌 Commit eba1596 has been approved by petrochenkov

It is now in the queue for this repository.

[Kobzol]

@rust-timer build 14633ab

Testing for #145407.

[rust-timer]

Finished benchmarking commit (14633ab): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	1.5%	[1.5%, 1.5%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-2.2%	[-3.1%, -1.3%]	2
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-1.0%	[-3.1%, 1.5%]	3

Max RSS (memory usage)

Results (secondary -1.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.9%	[0.9%, 0.9%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.6%	[-3.6%, -3.6%]	1
All ❌✅ (primary)	-	-	0

Cycles

Results (primary -2.3%, secondary 3.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.6%	[2.2%, 6.5%]	4
Improvements ✅ (primary)	-2.3%	[-2.3%, -2.3%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-2.3%	[-2.3%, -2.3%]	1

Binary size

Results (primary -0.3%, secondary -0.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	0.1%	[0.1%, 0.1%]	2
Regressions ❌ (secondary)	0.4%	[0.1%, 0.7%]	2
Improvements ✅ (primary)	-0.4%	[-0.6%, -0.3%]	4
Improvements ✅ (secondary)	-0.2%	[-0.4%, -0.0%]	7
All ❌✅ (primary)	-0.3%	[-0.6%, 0.1%]	6

Bootstrap: 470.516s -> 471.565s (0.22%)
Artifact size: 377.36 MiB -> 377.35 MiB (-0.00%)