Rollup of 4 pull requests #113922

matthiaskrgr · 2023-07-21T15:17:43Z

Successful merges:

new solver: add a separate cache for coherence #113887 (new solver: add a separate cache for coherence)
Add FnPtr ty to SMIR #113910 (Add FnPtr ty to SMIR)
error/E0691: include alignment in error message #113913 (error/E0691: include alignment in error message)
rustc_target: drop duplicate code #113914 (rustc_target: drop duplicate code)

r? @ghost
@rustbot modify labels: rollup

Drop duplicate helper methods on `Layout`, which are already implemented on `LayoutS`. Note that `Layout` has a `Deref` implementation to `LayoutS`, so all accessors are automatically redirected. The methods are identical and have been copied to `rustc_abi` in: commit 390a637 Author: hamidreza kalbasi <hamidrezakalbasi@protonmail.com> Date: Mon Nov 7 00:36:11 2022 +0330 move things from rustc_target::abi to rustc_abi This commit left behind the original implementation. Drop it now. Signed-off-by: David Rheinsberg <david@readahead.eu>

Include the computed alignment of the violating field when rejecting transparent types with non-trivially aligned ZSTs. ZST member fields in transparent types must have an alignment of 1 (to ensure it does not raise the layout requirements of the transparent field). The current error message looks like this: LL | struct Foobar(u32, [u32; 0]); | ^^^^^^^^ has alignment larger than 1 This patch changes the report to include the alignment of the violating field: LL | struct Foobar(u32, [u32; 0]); | ^^^^^^^^ has alignment of 4, which is larger than 1 In case of unknown alignments, it will yield: LL | struct Foobar<T>(u32, [T; 0]); | ^^^^^^ may have alignment larger than 1 This allows developers to get a better grasp why a specific field is rejected. Knowing the alignment of the violating field makes it easier to judge where that alignment-requirement originates, and thus hopefully provide better hints on how to mitigate the problem. This idea was proposed in 2022 in rust-lang#98071 as part of a bigger change. This commit simply extracts this error-message change, to decouple it from the other diagnostic improvements.

…rrors new solver: add a separate cache for coherence based on rust-lang#113835 `typenum` now compiles with `-Ztrait-solver=next-coherence`. Because we disable caching once we encounter the recursion limit it is still really slow, but at least it passes and I will deal with overflow handling afterwards. `typenum` previously hanged. The top 10 goals were ```rust 1749948 counts ( 1) 601056 (34.3%, 34.3%): Canonical { value: QueryInput { goal: Goal { predicate: Binder { value: ProjectionPredicate(AliasTy { args: [^1_0], def_id: DefId(0:1196 ~ typenum[0ab6]::type_operators::Len::Output) }, Term::Ty(^1_1)), bound_vars: [] }, param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst } }, anchor: Bubble, predefined_opaques_in_body: PredefinedOpaques(PredefinedOpaquesData { opaque_types: [] }) }, max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }, CanonicalVarInfo { kind: Ty(General(U0)) }] } ( 2) 240422 (13.7%, 48.1%): Canonical { value: QueryInput { goal: Goal { predicate: Binder { value: ProjectionPredicate(AliasTy { args: [<^1_0 as type_operators::Len>::Output, bit::B1], def_id: DefId(1:2752 ~ core[a405]::ops::arith::Add::Output) }, Term::Ty(^1_1)), bound_vars: [] }, param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst } }, anchor: Bubble, predefined_opaques_in_body: PredefinedOpaques(PredefinedOpaquesData { opaque_types: [] }) }, max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }, CanonicalVarInfo { kind: Ty(General(U0)) }] } ( 3) 198367 (11.3%, 59.4%): Canonical { value: QueryInput { goal: Goal { predicate: Binder { value: TraitPredicate(<^1_0 as core::marker::Sized>, polarity:Positive), bound_vars: [] }, param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst } }, anchor: Bubble, predefined_opaques_in_body: PredefinedOpaques(PredefinedOpaquesData { opaque_types: [] }) }, max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }] } ( 4) 96168 ( 5.5%, 64.9%): Canonical { value: QueryInput { goal: Goal { predicate: Binder { value: ProjectionPredicate(AliasTy { args: [<^1_0 as type_operators::Len>::Output, bit::B1], def_id: DefId(1:2752 ~ core[a405]::ops::arith::Add::Output) }, Term::Ty(<<^1_0 as type_operators::Len>::Output as core::ops::Add<bit::B1>>::Output)), bound_vars: [] }, param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst } }, anchor: Bubble, predefined_opaques_in_body: PredefinedOpaques(PredefinedOpaquesData { opaque_types: [] }) }, max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }] } ( 5) 78155 ( 4.5%, 69.4%): Canonical { value: QueryInput { goal: Goal { predicate: Binder { value: TraitPredicate(<^1_0 as marker_traits::Unsigned>, polarity:Positive), bound_vars: [] }, param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst } }, anchor: Bubble, predefined_opaques_in_body: PredefinedOpaques(PredefinedOpaquesData { opaque_types: [] }) }, max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }] } ( 6) 72140 ( 4.1%, 73.5%): Canonical { value: QueryInput { goal: Goal { predicate: Binder { value: TraitPredicate(<^1_0 as marker_traits::Bit>, polarity:Positive), bound_vars: [] }, param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst } }, anchor: Bubble, predefined_opaques_in_body: PredefinedOpaques(PredefinedOpaquesData { opaque_types: [] }) }, max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }] } ( 7) 60107 ( 3.4%, 76.9%): Canonical { value: QueryInput { goal: Goal { predicate: Binder { value: TraitPredicate(<^1_0 as type_operators::Len>, polarity:Positive), bound_vars: [] }, param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst } }, anchor: Bubble, predefined_opaques_in_body: PredefinedOpaques(PredefinedOpaquesData { opaque_types: [] }) }, max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }] } ( 8) 60106 ( 3.4%, 80.4%): Canonical { value: QueryInput { goal: Goal { predicate: Binder { value: ProjectionPredicate(AliasTy { args: [uint::UInt<^1_0, ^1_1>], def_id: DefId(0:1196 ~ typenum[0ab6]::type_operators::Len::Output) }, Term::Ty(^1_2)), bound_vars: [] }, param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst } }, anchor: Bubble, predefined_opaques_in_body: PredefinedOpaques(PredefinedOpaquesData { opaque_types: [] }) }, max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }, CanonicalVarInfo { kind: Ty(General(U0)) }, CanonicalVarInfo { kind: Ty(General(U0)) }] } ( 9) 60106 ( 3.4%, 83.8%): Canonical { value: QueryInput { goal: Goal { predicate: Binder { value: TraitPredicate(<<<^1_0 as type_operators::Len>::Output as core::ops::Add<bit::B1>>::Output as marker_traits::Unsigned>, polarity:Positive), bound_vars: [] }, param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst } }, anchor: Bubble, predefined_opaques_in_body: PredefinedOpaques(PredefinedOpaquesData { opaque_types: [] }) }, max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }] } ( 10) 60106 ( 3.4%, 87.2%): Canonical { value: QueryInput { goal: Goal { predicate: Binder { value: TraitPredicate(<<^1_0 as type_operators::Len>::Output as core::ops::Add<bit::B1>>, polarity:Positive), bound_vars: [] }, param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst } }, anchor: Bubble, predefined_opaques_in_body: PredefinedOpaques(PredefinedOpaquesData { opaque_types: [] }) }, max_universe: U0, variables: [CanonicalVarInfo { kind: Ty(General(U0)) }] } ``` r? ``@compiler-errors``

Add FnPtr ty to SMIR r? `@oli-obk`

error/E0691: include alignment in error message Include the computed alignment of the violating field when rejecting transparent types with non-trivially aligned ZSTs. ZST member fields in transparent types must have an alignment of 1 (to ensure it does not raise the layout requirements of the transparent field). The current error message looks like this: ```text LL | struct Foobar(u32, [u32; 0]); | ^^^^^^^^ has alignment larger than 1 ``` This patch changes the report to include the alignment of the violating field: ```text LL | struct Foobar(u32, [u32; 0]); | ^^^^^^^^ has alignment of 4, which is larger than 1 ``` In case of unknown alignments, it will yield: ```text LL | struct Foobar(u32, [u32; 0]); | ^^^^^^^^ may have alignment larger than 1 ``` This allows developers to get a better grasp why a specific field is rejected. Knowing the alignment of the violating field makes it easier to judge where that alignment-requirement originates, and thus hopefully provide better hints on how to mitigate the problem. This idea was proposed in 2022 in rust-lang#98071 as part of a bigger change. This commit simply extracts this error-message change, to decouple it from the other diagnostic improvements. (Originally proposed by `@compiler-errors` in rust-lang#98071)

rustc_target: drop duplicate code Drop duplicate helper methods on `Layout`, which are already implemented on `LayoutS`. Note that `Layout` has a `Deref` implementation to `LayoutS`, so all accessors are automatically redirected. The methods are identical and have been copied to `rustc_abi` in: commit 390a637 Author: hamidreza kalbasi <hamidrezakalbasi@protonmail.com> Date: Mon Nov 7 00:36:11 2022 +0330 move things from rustc_target::abi to rustc_abi This commit left behind the original implementation. Drop it now. (originally moved by ``@HKalbasi)``

matthiaskrgr · 2023-07-21T15:17:55Z

@bors r+ rollup=never p=4

bors · 2023-07-21T15:17:57Z

📌 Commit 1aaf583 has been approved by matthiaskrgr

It is now in the queue for this repository.

bors · 2023-07-21T16:52:24Z

⌛ Testing commit 1aaf583 with merge c3c5a5c...

bors · 2023-07-21T18:40:59Z

☀️ Test successful - checks-actions
Approved by: matthiaskrgr
Pushing c3c5a5c to master...

rust-timer · 2023-07-21T18:42:08Z

📌 Perf builds for each rolled up PR:

PR#	Message	Perf Build Sha
#113887	new solver: add a separate cache for coherence	`587ebe64df410883dc8626eb24549bd5765d97b3` (link)
#113910	Add FnPtr ty to SMIR	`4ec10499a9e7ece50222b1435c24b90b3f09c1fd` (link)
#113913	error/E0691: include alignment in error message	`e24f7c66104e8eba342870403dbe953ba4a0b87d` (link)
#113914	rustc_target: drop duplicate code	`f30a075d6f57c9fd9dc3c386d4ff415b767053a5` (link)

previous master: 557359f925

In the case of a perf regression, run the following command for each PR you suspect might be the cause: @rust-timer build $SHA

rust-timer · 2023-07-21T20:13:42Z

Finished benchmarking commit (c3c5a5c): 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)	2.8%	[2.8%, 2.8%]	1
Regressions ❌ (secondary)	2.1%	[2.1%, 2.1%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	2.8%	[2.8%, 2.8%]	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)	-3.6%	[-3.9%, -2.9%]	6
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-3.6%	[-3.9%, -2.9%]	6

Binary size

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

Bootstrap: 658.335s -> 658.525s (0.03%)

spastorino and others added 11 commits July 20, 2023 22:20

Add tables to Stable::stable

cbabd00

Implement Stable for ty::GenericArgs

93bcc2e

Add FnPtr ty to SMIR

17b8977

new solver: add a separate cache for coherence

303af36

Implement Stable for ty::Ty

634db10

Rollup merge of rust-lang#113910 - spastorino:smir-types-5, r=oli-obk

b91c41b

Add FnPtr ty to SMIR r? `@oli-obk`

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 21, 2023

bors added the merged-by-bors This PR was explicitly merged by bors. label Jul 21, 2023

bors merged commit c3c5a5c into rust-lang:master Jul 21, 2023

rustbot added this to the 1.73.0 milestone Jul 21, 2023

matthiaskrgr deleted the rollup-90cj2vv branch March 16, 2024 18:18

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Rollup of 4 pull requests #113922

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rust-timer commented Jul 21, 2023

Overall result: no relevant changes - no action needed

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