Remove the DefPathHash check

[saethlin]

Just wondering how much perf this is worth

So the answer is "Some, but not a lot". I suspect the better implementation here is to precompute more of the call graph, but all my attempts to do that and thus fix the perf regression have resulted in query cycles between optimized_mir and cross_crate_inlinable.

r? @ghost

[saethlin]

@bors try @rust-timer queue

[bors]

⌛ Trying commit 838c879 with merge 2648bc7...

[bors]

☀️ Try build successful - checks-actions
Build commit: 2648bc7 (2648bc7f31ac8a75411583ea5929fd4c6abe776f)

[rust-timer]

Finished benchmarking commit (2648bc7): comparison URL.

Overall result: ❌ regressions - 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.

Next Steps: If you can justify the regressions found in this try perf run, please indicate this with @rustbot label: +perf-regression-triaged along with sufficient written justification. If you cannot justify the regressions please fix the regressions and do another perf run. If the next run shows neutral or positive results, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +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)	1.0%	[0.3%, 2.1%]	5
Regressions ❌ (secondary)	0.8%	[0.8%, 0.8%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.0%	[0.3%, 2.1%]	5

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)	-	-	0
Improvements ✅ (primary)	-2.1%	[-2.1%, -2.1%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-2.1%	[-2.1%, -2.1%]	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)	1.2%	[0.7%, 1.5%]	3
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.2%	[0.7%, 1.5%]	3

Binary size

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

Bootstrap: 631.871s -> 638.561s (1.06%)
Artifact size: 304.05 MiB -> 304.05 MiB (-0.00%)

[bors]

☔ The latest upstream changes (presumably #120060) made this pull request unmergeable. Please resolve the merge conflicts.