Rollup merge of rust-lang#131748 - lcnr:typing-mode, r=compiler-errors

cleanup canonical queries

best reviewed commit by commit. adding `CanonicalQueryInput` to stop returning `defining_opaque_types` in query responses is the most involved change here.

r? ``@compiler-errors``

Author: matthiaskrgr

compiler/rustc_borrowck/src/diagnostics/bound_region_errors.rs

@@ -3,12 +3,16 @@ use std::rc::Rc;
 
 use rustc_errors::Diag;
 use rustc_hir::def_id::LocalDefId;
-use rustc_infer::infer::canonical::Canonical;
+use rustc_infer::infer::canonical::CanonicalQueryInput;
 use rustc_infer::infer::region_constraints::{Constraint, RegionConstraintData};
 use rustc_infer::infer::{
     InferCtxt, RegionResolutionError, RegionVariableOrigin, SubregionOrigin, TyCtxtInferExt as _,
 };
 use rustc_infer::traits::ObligationCause;
+use rustc_infer::traits::query::{
+    CanonicalTypeOpAscribeUserTypeGoal, CanonicalTypeOpNormalizeGoal,
+    CanonicalTypeOpProvePredicateGoal,
+};
 use rustc_middle::ty::error::TypeError;
 use rustc_middle::ty::{
     self, RePlaceholder, Region, RegionVid, Ty, TyCtxt, TypeFoldable, UniverseIndex,
@@ -95,9 +99,7 @@ impl<'tcx> ToUniverseInfo<'tcx> for crate::type_check::InstantiateOpaqueType<'tc
     }
 }
 
-impl<'tcx> ToUniverseInfo<'tcx>
-    for Canonical<'tcx, ty::ParamEnvAnd<'tcx, type_op::prove_predicate::ProvePredicate<'tcx>>>
-{
+impl<'tcx> ToUniverseInfo<'tcx> for CanonicalTypeOpProvePredicateGoal<'tcx> {
     fn to_universe_info(self, base_universe: ty::UniverseIndex) -> UniverseInfo<'tcx> {
         UniverseInfo(UniverseInfoInner::TypeOp(Rc::new(PredicateQuery {
             canonical_query: self,
@@ -107,7 +109,7 @@ impl<'tcx> ToUniverseInfo<'tcx>
 }
 
 impl<'tcx, T: Copy + fmt::Display + TypeFoldable<TyCtxt<'tcx>> + 'tcx> ToUniverseInfo<'tcx>
-    for Canonical<'tcx, ty::ParamEnvAnd<'tcx, type_op::Normalize<T>>>
+    for CanonicalTypeOpNormalizeGoal<'tcx, T>
 {
     fn to_universe_info(self, base_universe: ty::UniverseIndex) -> UniverseInfo<'tcx> {
         UniverseInfo(UniverseInfoInner::TypeOp(Rc::new(NormalizeQuery {
@@ -117,9 +119,7 @@ impl<'tcx, T: Copy + fmt::Display + TypeFoldable<TyCtxt<'tcx>> + 'tcx> ToUnivers
     }
 }
 
-impl<'tcx> ToUniverseInfo<'tcx>
-    for Canonical<'tcx, ty::ParamEnvAnd<'tcx, type_op::AscribeUserType<'tcx>>>
-{
+impl<'tcx> ToUniverseInfo<'tcx> for CanonicalTypeOpAscribeUserTypeGoal<'tcx> {
     fn to_universe_info(self, base_universe: ty::UniverseIndex) -> UniverseInfo<'tcx> {
         UniverseInfo(UniverseInfoInner::TypeOp(Rc::new(AscribeUserTypeQuery {
             canonical_query: self,
@@ -128,7 +128,7 @@ impl<'tcx> ToUniverseInfo<'tcx>
     }
 }
 
-impl<'tcx, F> ToUniverseInfo<'tcx> for Canonical<'tcx, type_op::custom::CustomTypeOp<F>> {
+impl<'tcx, F> ToUniverseInfo<'tcx> for CanonicalQueryInput<'tcx, type_op::custom::CustomTypeOp<F>> {
     fn to_universe_info(self, _base_universe: ty::UniverseIndex) -> UniverseInfo<'tcx> {
         // We can't rerun custom type ops.
         UniverseInfo::other()
@@ -211,16 +211,15 @@ trait TypeOpInfo<'tcx> {
 }
 
 struct PredicateQuery<'tcx> {
-    canonical_query:
-        Canonical<'tcx, ty::ParamEnvAnd<'tcx, type_op::prove_predicate::ProvePredicate<'tcx>>>,
+    canonical_query: CanonicalTypeOpProvePredicateGoal<'tcx>,
     base_universe: ty::UniverseIndex,
 }
 
 impl<'tcx> TypeOpInfo<'tcx> for PredicateQuery<'tcx> {
     fn fallback_error(&self, tcx: TyCtxt<'tcx>, span: Span) -> Diag<'tcx> {
         tcx.dcx().create_err(HigherRankedLifetimeError {
             cause: Some(HigherRankedErrorCause::CouldNotProve {
-                predicate: self.canonical_query.value.value.predicate.to_string(),
+                predicate: self.canonical_query.canonical.value.value.predicate.to_string(),
             }),
             span,
         })
@@ -253,7 +252,7 @@ impl<'tcx> TypeOpInfo<'tcx> for PredicateQuery<'tcx> {
 }
 
 struct NormalizeQuery<'tcx, T> {
-    canonical_query: Canonical<'tcx, ty::ParamEnvAnd<'tcx, type_op::Normalize<T>>>,
+    canonical_query: CanonicalTypeOpNormalizeGoal<'tcx, T>,
     base_universe: ty::UniverseIndex,
 }
 
@@ -264,7 +263,7 @@ where
     fn fallback_error(&self, tcx: TyCtxt<'tcx>, span: Span) -> Diag<'tcx> {
         tcx.dcx().create_err(HigherRankedLifetimeError {
             cause: Some(HigherRankedErrorCause::CouldNotNormalize {
-                value: self.canonical_query.value.value.value.to_string(),
+                value: self.canonical_query.canonical.value.value.value.to_string(),
             }),
             span,
         })
@@ -306,7 +305,7 @@ where
 }
 
 struct AscribeUserTypeQuery<'tcx> {
-    canonical_query: Canonical<'tcx, ty::ParamEnvAnd<'tcx, type_op::AscribeUserType<'tcx>>>,
+    canonical_query: CanonicalTypeOpAscribeUserTypeGoal<'tcx>,
     base_universe: ty::UniverseIndex,
 }
 

compiler/rustc_borrowck/src/type_check/canonical.rs

@@ -137,7 +137,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
         let _: Result<_, ErrorGuaranteed> = self.fully_perform_op(
             locations,
             category,
-            param_env.and(type_op::prove_predicate::ProvePredicate::new(predicate)),
+            param_env.and(type_op::prove_predicate::ProvePredicate { predicate }),
         );
     }
 
@@ -162,7 +162,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
         let result: Result<_, ErrorGuaranteed> = self.fully_perform_op(
             location.to_locations(),
             category,
-            param_env.and(type_op::normalize::Normalize::new(value)),
+            param_env.and(type_op::normalize::Normalize { value }),
         );
         result.unwrap_or(value)
     }
@@ -223,7 +223,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
         let _: Result<_, ErrorGuaranteed> = self.fully_perform_op(
             Locations::All(span),
             ConstraintCategory::Boring,
-            self.param_env.and(type_op::ascribe_user_type::AscribeUserType::new(mir_ty, user_ty)),
+            self.param_env.and(type_op::ascribe_user_type::AscribeUserType { mir_ty, user_ty }),
         );
     }
 

compiler/rustc_borrowck/src/type_check/free_region_relations.rs

@@ -280,7 +280,7 @@ impl<'tcx> UniversalRegionRelationsBuilder<'_, 'tcx> {
             }
             let TypeOpOutput { output: norm_ty, constraints: constraints_normalize, .. } = self
                 .param_env
-                .and(type_op::normalize::Normalize::new(ty))
+                .and(type_op::normalize::Normalize { value: ty })
                 .fully_perform(self.infcx, span)
                 .unwrap_or_else(|guar| TypeOpOutput {
                     output: Ty::new_error(self.infcx.tcx, guar),
@@ -318,7 +318,7 @@ impl<'tcx> UniversalRegionRelationsBuilder<'_, 'tcx> {
             for &(ty, _) in tcx.assumed_wf_types(tcx.local_parent(defining_ty_def_id)) {
                 let result: Result<_, ErrorGuaranteed> = self
                     .param_env
-                    .and(type_op::normalize::Normalize::new(ty))
+                    .and(type_op::normalize::Normalize { value: ty })
                     .fully_perform(self.infcx, span);
                 let Ok(TypeOpOutput { output: norm_ty, constraints: c, .. }) = result else {
                     continue;
@@ -373,7 +373,7 @@ impl<'tcx> UniversalRegionRelationsBuilder<'_, 'tcx> {
     ) -> Option<&'tcx QueryRegionConstraints<'tcx>> {
         let TypeOpOutput { output: bounds, constraints, .. } = self
             .param_env
-            .and(type_op::implied_outlives_bounds::ImpliedOutlivesBounds { ty })
+            .and(type_op::ImpliedOutlivesBounds { ty })
             .fully_perform(self.infcx, span)
             .map_err(|_: ErrorGuaranteed| debug!("failed to compute implied bounds {:?}", ty))
             .ok()?;

compiler/rustc_borrowck/src/type_check/liveness/trace.rs

@@ -11,8 +11,7 @@ use rustc_mir_dataflow::impls::MaybeInitializedPlaces;
 use rustc_mir_dataflow::move_paths::{HasMoveData, MoveData, MovePathIndex};
 use rustc_mir_dataflow::points::{DenseLocationMap, PointIndex};
 use rustc_span::DUMMY_SP;
-use rustc_trait_selection::traits::query::type_op::outlives::DropckOutlives;
-use rustc_trait_selection::traits::query::type_op::{TypeOp, TypeOpOutput};
+use rustc_trait_selection::traits::query::type_op::{DropckOutlives, TypeOp, TypeOpOutput};
 use tracing::debug;
 
 use crate::location::RichLocation;
@@ -632,7 +631,7 @@ impl<'tcx> LivenessContext<'_, '_, '_, 'tcx> {
 
         match typeck
             .param_env
-            .and(DropckOutlives::new(dropped_ty))
+            .and(DropckOutlives { dropped_ty })
             .fully_perform(typeck.infcx, DUMMY_SP)
         {
             Ok(TypeOpOutput { output, constraints, .. }) => {

compiler/rustc_hir_typeck/src/method/probe.rs

@@ -340,13 +340,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         OP: FnOnce(ProbeContext<'_, 'tcx>) -> Result<R, MethodError<'tcx>>,
     {
         let mut orig_values = OriginalQueryValues::default();
-        let param_env_and_self_ty = self.canonicalize_query(
+        let query_input = self.canonicalize_query(
             ParamEnvAnd { param_env: self.param_env, value: self_ty },
             &mut orig_values,
         );
 
         let steps = match mode {
-            Mode::MethodCall => self.tcx.method_autoderef_steps(param_env_and_self_ty),
+            Mode::MethodCall => self.tcx.method_autoderef_steps(query_input),
             Mode::Path => self.probe(|_| {
                 // Mode::Path - the deref steps is "trivial". This turns
                 // our CanonicalQuery into a "trivial" QueryResponse. This
@@ -355,11 +355,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
                 let infcx = &self.infcx;
                 let (ParamEnvAnd { param_env: _, value: self_ty }, canonical_inference_vars) =
-                    infcx.instantiate_canonical(span, &param_env_and_self_ty);
-                debug!(
-                    "probe_op: Mode::Path, param_env_and_self_ty={:?} self_ty={:?}",
-                    param_env_and_self_ty, self_ty
-                );
+                    infcx.instantiate_canonical(span, &query_input.canonical);
+                debug!(?self_ty, ?query_input, "probe_op: Mode::Path");
                 MethodAutoderefStepsResult {
                     steps: infcx.tcx.arena.alloc_from_iter([CandidateStep {
                         self_ty: self.make_query_response_ignoring_pending_obligations(

compiler/rustc_infer/src/infer/canonical/canonicalizer.rs

@@ -17,7 +17,8 @@ use tracing::debug;
 
 use crate::infer::InferCtxt;
 use crate::infer::canonical::{
-    Canonical, CanonicalTyVarKind, CanonicalVarInfo, CanonicalVarKind, OriginalQueryValues,
+    Canonical, CanonicalQueryInput, CanonicalTyVarKind, CanonicalVarInfo, CanonicalVarKind,
+    OriginalQueryValues,
 };
 
 impl<'tcx> InferCtxt<'tcx> {
@@ -40,12 +41,12 @@ impl<'tcx> InferCtxt<'tcx> {
         &self,
         value: ty::ParamEnvAnd<'tcx, V>,
         query_state: &mut OriginalQueryValues<'tcx>,
-    ) -> Canonical<'tcx, ty::ParamEnvAnd<'tcx, V>>
+    ) -> CanonicalQueryInput<'tcx, ty::ParamEnvAnd<'tcx, V>>
     where
         V: TypeFoldable<TyCtxt<'tcx>>,
     {
         let (param_env, value) = value.into_parts();
-        let mut param_env = self.tcx.canonical_param_env_cache.get_or_insert(
+        let param_env = self.tcx.canonical_param_env_cache.get_or_insert(
             self.tcx,
             param_env,
             query_state,
@@ -62,17 +63,16 @@ impl<'tcx> InferCtxt<'tcx> {
             },
         );
 
-        param_env.defining_opaque_types = self.defining_opaque_types;
-
-        Canonicalizer::canonicalize_with_base(
+        let canonical = Canonicalizer::canonicalize_with_base(
             param_env,
             value,
             Some(self),
             self.tcx,
             &CanonicalizeAllFreeRegions,
             query_state,
         )
-        .unchecked_map(|(param_env, value)| param_env.and(value))
+        .unchecked_map(|(param_env, value)| param_env.and(value));
+        CanonicalQueryInput { canonical, defining_opaque_types: self.defining_opaque_types() }
     }
 
     /// Canonicalizes a query *response* `V`. When we canonicalize a
@@ -544,7 +544,6 @@ impl<'cx, 'tcx> Canonicalizer<'cx, 'tcx> {
             max_universe: ty::UniverseIndex::ROOT,
             variables: List::empty(),
             value: (),
-            defining_opaque_types: infcx.map(|i| i.defining_opaque_types).unwrap_or_default(),
         };
         Canonicalizer::canonicalize_with_base(
             base,
@@ -614,15 +613,7 @@ impl<'cx, 'tcx> Canonicalizer<'cx, 'tcx> {
             .max()
             .unwrap_or(ty::UniverseIndex::ROOT);
 
-        assert!(
-            !infcx.is_some_and(|infcx| infcx.defining_opaque_types != base.defining_opaque_types)
-        );
-        Canonical {
-            max_universe,
-            variables: canonical_variables,
-            value: (base.value, out_value),
-            defining_opaque_types: base.defining_opaque_types,
-        }
+        Canonical { max_universe, variables: canonical_variables, value: (base.value, out_value) }
     }
 
     /// Creates a canonical variable replacing `kind` from the input,

compiler/rustc_infer/src/infer/mod.rs

@@ -25,7 +25,7 @@ use rustc_hir as hir;
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_macros::extension;
 pub use rustc_macros::{TypeFoldable, TypeVisitable};
-use rustc_middle::infer::canonical::{Canonical, CanonicalVarValues};
+use rustc_middle::infer::canonical::{CanonicalQueryInput, CanonicalVarValues};
 use rustc_middle::infer::unify_key::{
     ConstVariableOrigin, ConstVariableValue, ConstVidKey, EffectVarValue, EffectVidKey,
 };
@@ -606,14 +606,14 @@ impl<'tcx> InferCtxtBuilder<'tcx> {
     pub fn build_with_canonical<T>(
         mut self,
         span: Span,
-        canonical: &Canonical<'tcx, T>,
+        input: &CanonicalQueryInput<'tcx, T>,
     ) -> (InferCtxt<'tcx>, T, CanonicalVarValues<'tcx>)
     where
         T: TypeFoldable<TyCtxt<'tcx>>,
     {
-        self.defining_opaque_types = canonical.defining_opaque_types;
+        self.defining_opaque_types = input.defining_opaque_types;
         let infcx = self.build();
-        let (value, args) = infcx.instantiate_canonical(span, canonical);
+        let (value, args) = infcx.instantiate_canonical(span, &input.canonical);
         (infcx, value, args)
     }
 

compiler/rustc_middle/src/infer/canonical.rs

@@ -34,6 +34,7 @@ use crate::infer::MemberConstraint;
 use crate::mir::ConstraintCategory;
 use crate::ty::{self, GenericArg, List, Ty, TyCtxt, TypeFlags, TypeVisitableExt};
 
+pub type CanonicalQueryInput<'tcx, V> = ir::CanonicalQueryInput<TyCtxt<'tcx>, V>;
 pub type Canonical<'tcx, V> = ir::Canonical<TyCtxt<'tcx>, V>;
 pub type CanonicalVarInfo<'tcx> = ir::CanonicalVarInfo<TyCtxt<'tcx>>;
 pub type CanonicalVarValues<'tcx> = ir::CanonicalVarValues<TyCtxt<'tcx>>;
@@ -182,7 +183,6 @@ impl<'tcx> CanonicalParamEnvCache<'tcx> {
                 max_universe: ty::UniverseIndex::ROOT,
                 variables: List::empty(),
                 value: key,
-                defining_opaque_types: ty::List::empty(),
             };
         }
 

compiler/rustc_middle/src/query/keys.rs

@@ -7,7 +7,7 @@ use rustc_span::symbol::{Ident, Symbol};
 use rustc_span::{DUMMY_SP, Span};
 use rustc_target::abi;
 
-use crate::infer::canonical::Canonical;
+use crate::infer::canonical::CanonicalQueryInput;
 use crate::ty::fast_reject::SimplifiedType;
 use crate::ty::layout::{TyAndLayout, ValidityRequirement};
 use crate::ty::{self, GenericArg, GenericArgsRef, Ty, TyCtxt};
@@ -485,7 +485,7 @@ impl Key for Option<Symbol> {
 
 /// Canonical query goals correspond to abstract trait operations that
 /// are not tied to any crate in particular.
-impl<'tcx, T: Clone> Key for Canonical<'tcx, T> {
+impl<'tcx, T: Clone> Key for CanonicalQueryInput<'tcx, T> {
     type Cache<V> = DefaultCache<Self, V>;
 
     fn default_span(&self, _tcx: TyCtxt<'_>) -> Span {