Shrink error variants for layout and fn_abi

[Noratrieb]

The errors are bigger than the result, so let's put them behind a reference. Since query results have to be Copy, we use a reference into the arena instead of a Box<T>.

[Noratrieb]

@bors try @rust-timer queue

[rustbot]

r? @TaKO8Ki

(rustbot has picked a reviewer for you, use r? to override)

[rustbot]

The Miri subtree was changed

cc @rust-lang/miri

Some changes occurred to the CTFE / Miri engine

cc @rust-lang/miri

[bors]

⌛ Trying commit 543503b7e9c79b6257493df1e770c9b2540d261c with merge 3cfdb3077f24cce228038d08eb41a9af12b43ac8...

[bors]

☀️ Try build successful - checks-actions
Build commit: 3cfdb3077f24cce228038d08eb41a9af12b43ac8 (3cfdb3077f24cce228038d08eb41a9af12b43ac8)

[rust-timer]

Finished benchmarking commit (3cfdb3077f24cce228038d08eb41a9af12b43ac8): comparison URL.

Overall result: no relevant changes - 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 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)	2.1%	[2.1%, 2.1%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-1.2%	[-1.2%, -1.2%]	1
All ❌✅ (primary)	2.1%	[2.1%, 2.1%]	1

Cycles

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

[wesleywiser]

@Nilstrieb are you still interested in landing this? perf results seem neutral but I'd be happy to review myself after a rebase if you're still interested 🙂

[Noratrieb]

r? wesleywiser

[bors]

☔ The latest upstream changes (presumably #111807) made this pull request unmergeable. Please resolve the merge conflicts.

[bors]

☔ The latest upstream changes (presumably #113022) made this pull request unmergeable. Please resolve the merge conflicts.

[wesleywiser]

r=me after rebase

[Noratrieb]

@bors r=wesleywiser rollup=maybe

[bors]

📌 Commit 4be8477 has been approved by wesleywiser

It is now in the queue for this repository.

[bors]

⌛ Testing commit 4be8477 with merge ba76096...

[bors]

☀️ Test successful - checks-actions
Approved by: wesleywiser
Pushing ba76096 to master...

[bors]

☀️ Test successful - checks-actions
Approved by: wesleywiser
Pushing ba76096 to master...

[rust-timer]

Finished benchmarking commit (ba76096): 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)	8.9%	[8.9%, 8.9%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-3.2%	[-3.2%, -3.2%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	2.9%	[-3.2%, 8.9%]	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)	0.5%	[0.5%, 0.5%]	2
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.5%	[0.5%, 0.5%]	2

Binary size

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

Bootstrap: 661.654s -> 662.486s (0.13%)