Make TrustedStep require Copy

[scottmcm]

All the implementations of the trait already are Copy, and this seems to be enough to simplify the implementations enough to make the MIR inliner willing to inline basics like Range::next.

r? @thomcc

[thomcc]

Looks nice.

@bors r+ rollup=never

[bors]

📌 Commit 11fa176 has been approved by thomcc

It is now in the queue for this repository.

[Noratrieb]

@bors r-
test requires blessing

[rustbot]

The Miri subtree was changed

cc @rust-lang/miri

[scottmcm]

@bors r=thomcc

[bors]

📌 Commit 50e01f4 has been approved by thomcc

It is now in the queue for this repository.

[bors]

⌛ Testing commit 50e01f4 with merge 578bcbc...

[bors]

☀️ Test successful - checks-actions
Approved by: thomcc
Pushing 578bcbc to master...

[rust-timer]

Finished benchmarking commit (578bcbc): comparison URL.

Overall result: ❌✅ regressions and improvements - ACTION NEEDED

Next Steps: If you can justify the regressions found in this perf run, please indicate this with @rustbot label: +perf-regression-triaged along with sufficient written justification. If you cannot justify the regressions please open an issue or create a new PR that fixes the regressions, add a comment linking to the newly created issue or PR, and then add the perf-regression-triaged label to this PR.

@rustbot label: +perf-regression
cc @rust-lang/wg-compiler-performance

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)	0.2%	[0.2%, 0.2%]	1
Regressions ❌ (secondary)	0.5%	[0.2%, 0.7%]	5
Improvements ✅ (primary)	-1.1%	[-1.1%, -1.1%]	1
Improvements ✅ (secondary)	-1.2%	[-3.5%, -0.4%]	13
All ❌✅ (primary)	-0.4%	[-1.1%, 0.2%]	2

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)	2.6%	[2.6%, 2.6%]	1
Improvements ✅ (primary)	-2.3%	[-2.3%, -2.3%]	1
Improvements ✅ (secondary)	-4.8%	[-5.9%, -2.1%]	5
All ❌✅ (primary)	-2.3%	[-2.3%, -2.3%]	1

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)	-1.8%	[-1.8%, -1.8%]	1
Improvements ✅ (secondary)	-3.0%	[-4.0%, -2.1%]	4
All ❌✅ (primary)	-1.8%	[-1.8%, -1.8%]	1

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)	0.1%	[0.0%, 0.8%]	44
Regressions ❌ (secondary)	0.8%	[0.2%, 1.4%]	2
Improvements ✅ (primary)	-0.1%	[-0.4%, -0.0%]	4
Improvements ✅ (secondary)	-0.4%	[-0.4%, -0.4%]	3
All ❌✅ (primary)	0.1%	[-0.4%, 0.8%]	48

Bootstrap: 645.491s -> 642.797s (-0.42%)