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Add constness to TraitDef #127200

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merged 1 commit into from
Jul 9, 2024
Merged

Add constness to TraitDef #127200

merged 1 commit into from
Jul 9, 2024

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Second attempt at fixing the regression @ #120639 (comment)

r? project-const-traits

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jul 1, 2024
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rustbot commented Jul 1, 2024

HIR ty lowering was modified

cc @fmease

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@bors try @rust-timer queue

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@rustbot rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jul 1, 2024
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bors commented Jul 1, 2024

⌛ Trying commit ee2d52a with merge 6cb3b57...

bors added a commit to rust-lang-ci/rust that referenced this pull request Jul 1, 2024
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Auto merge of rust-lang#127200 - fee1-dead-contrib:trait_def_const_tr…
6cb3b57 
…ait, r=<try>

Add `constness` to `TraitDef`

Second attempt at fixing the regression @ rust-lang#120639 (comment)

r? project-const-traits
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bors commented Jul 1, 2024

💔 Test failed - checks-actions

@bors bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jul 1, 2024
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@bors try @rust-timer queue

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bors added a commit to rust-lang-ci/rust that referenced this pull request Jul 1, 2024
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Auto merge of rust-lang#127200 - fee1-dead-contrib:trait_def_const_tr…
576fbf8 
…ait, r=<try>

Add `constness` to `TraitDef`

Second attempt at fixing the regression @ rust-lang#120639 (comment)

r? project-const-traits
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bors commented Jul 1, 2024

⌛ Trying commit 93b42fc with merge 576fbf8...

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bors commented Jul 1, 2024

☀️ Try build successful - checks-actions
Build commit: 576fbf8 (576fbf8589d1c38cf150f37c8e69b276a6ec23c3)

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Finished benchmarking commit (576fbf8): comparison URL.

Overall result: ❌✅ regressions and improvements - 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)		 - - 0
Regressions ❌
(secondary)		 0.4% [0.4%, 0.4%] 1
Improvements ✅
(primary)		 -0.3% [-0.3%, -0.2%] 3
Improvements ✅
(secondary)		 -0.3% [-0.3%, -0.3%] 1
All ❌✅ (primary) -0.3% [-0.3%, -0.2%] 3

Max RSS (memory usage)

Results (primary -6.7%, secondary -2.7%)

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)		 -6.7% [-6.7%, -6.7%] 1
Improvements ✅
(secondary)		 -2.7% [-2.7%, -2.7%] 1
All ❌✅ (primary) -6.7% [-6.7%, -6.7%] 1

Cycles

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

Binary size

Results (secondary 0.0%)

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)		 0.0% [0.0%, 0.0%] 1
Improvements ✅
(primary)		 - - 0
Improvements ✅
(secondary)		 - - 0
All ❌✅ (primary) - - 0

Bootstrap: 699.484s -> 695.977s (-0.50%)
Artifact size: 326.66 MiB -> 326.72 MiB (0.02%)

@rustbot rustbot added perf-regression Performance regression. and removed S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Jul 1, 2024
compiler-errors
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You should be able to set EncodeCrossCrate::No for const_trait, though I don't think it'll improve perf :/

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You should be able to set EncodeCrossCrate::No for const_trait, though I don't think it'll improve perf :/

done

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Jul 3, 2024
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FWIW, I think this is a perf improvement. Looking at the details of the single perf regression seems to show more instructions being spent on loading incremental data. That might be because we added constness to TraitDef. But cycles doesn't have any significant changes so I think this should be fine.

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compiler-errors approved these changes Jul 9, 2024
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One question, r=me otherwise

compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
@@ -1847,19 +1847,13 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
path.segments[..path.segments.len() - 2].iter(),
GenericsArgsErrExtend::None,
);
// HACK: until we support `<Type as ~const Trait>`, assume all of them are.
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Why was this removed? Do we not need this anymore?

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since we don't have the constness param on traits, we don't need <T as ~const> anymore

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@bors rollup=never

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@bors r=compiler-errors

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bors commented Jul 9, 2024

📌 Commit 46af987 has been approved by compiler-errors

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jul 9, 2024
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bors commented Jul 9, 2024

⌛ Testing commit 46af987 with merge 5be2ec7...

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bors commented Jul 9, 2024

☀️ Test successful - checks-actions
Approved by: compiler-errors
Pushing 5be2ec7 to master...

@bors bors added the merged-by-bors This PR was explicitly merged by bors. label Jul 9, 2024
@bors bors merged commit 5be2ec7 into rust-lang:master Jul 9, 2024
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@rustbot rustbot added this to the 1.81.0 milestone Jul 9, 2024
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Finished benchmarking commit (5be2ec7): 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)		 -0.4% [-0.4%, -0.4%] 1
All ❌✅ (primary) - - 0

Max RSS (memory usage)

Results (secondary -4.3%)

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)		 -4.3% [-4.3%, -4.3%] 2
All ❌✅ (primary) - - 0

Cycles

Results (secondary -2.7%)

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)		 -2.7% [-2.7%, -2.7%] 2
All ❌✅ (primary) - - 0

Binary size

Results (secondary 0.0%)

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)		 0.0% [0.0%, 0.0%] 1
Improvements ✅
(primary)		 - - 0
Improvements ✅
(secondary)		 - - 0
All ❌✅ (primary) - - 0

Bootstrap: 703.367s -> 702.485s (-0.13%)
Artifact size: 328.80 MiB -> 328.89 MiB (0.03%)

@rustbot rustbot removed the perf-regression Performance regression. label Jul 9, 2024
@fee1-dead fee1-dead deleted the trait_def_const_trait branch July 10, 2024 06:41
@fee1-dead fee1-dead added the PG-const-traits Project group: Const traits label Aug 9, 2024
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