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Rollup merge of #131856 - lcnr:typing-mode, r=compiler-errors

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TypingMode: merge intercrate, reveal, and defining_opaque_types

This adds `TypingMode` and uses it in most places. We do not yet remove `Reveal` from `param_env`s. This and other future work as tracked in #132279 and via `FIXME`s.

Fetching the `TypingMode` of the `InferCtxt` asserts that the `TypingMode` agrees with `ParamEnv::reveal` to make sure we don't introduce any subtle bugs here. This will be unnecessary once `ParamEnv::reveal` no longer exists.

As the `TypingMode` is now a part of the query input, I've merged the coherence and non-coherence caches for the new solver. I've also enabled the local `infcx` cache during coherence by clearing the cache when forking it with a different `TypingMode`.

#### `TypingMode::from_param_env`

I am using this even in cases where I know that the `param_env` will always be `Reveal::UserFacing`. This is to make it easier to correctly refactor this code in the future, any time we use `Reveal::UserFacing` in a body while not defining its opaque types is incorrect and should use a `TypingMode` which only reveals opaques defined by that body instead, cc #124598

r? ``@compiler-errors``
This commit is contained in:
Matthias Krüger 2024-10-30 06:40:34 +01:00 committed by GitHub
commit 305508f969
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GPG Key ID: B5690EEEBB952194
89 changed files with 537 additions and 532 deletions
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4
compiler/rustc_borrowck/src/lib.rs
View File

@ -34,7 +34,7 @@
use rustc_middle::mir::tcx::PlaceTy;
use rustc_middle::mir::*;
use rustc_middle::query::Providers;
use rustc_middle::ty::{self, ParamEnv, RegionVid, TyCtxt};
use rustc_middle::ty::{self, ParamEnv, RegionVid, TyCtxt, TypingMode};
use rustc_middle::{bug, span_bug};
use rustc_mir_dataflow::Analysis;
use rustc_mir_dataflow::impls::{
@ -440,7 +440,7 @@ pub struct BorrowckInferCtxt<'tcx> {
impl<'tcx> BorrowckInferCtxt<'tcx> {
pub(crate) fn new(tcx: TyCtxt<'tcx>, def_id: LocalDefId) -> Self {
let infcx = tcx.infer_ctxt().with_opaque_type_inference(def_id).build();
let infcx = tcx.infer_ctxt().build(TypingMode::analysis_in_body(tcx, def_id));
BorrowckInferCtxt { infcx, reg_var_to_origin: RefCell::new(Default::default()) }
}

14
compiler/rustc_borrowck/src/region_infer/opaque_types.rs
View File

@ -9,6 +9,7 @@
use rustc_middle::ty::visit::TypeVisitableExt;
use rustc_middle::ty::{
self, GenericArgKind, GenericArgs, OpaqueHiddenType, OpaqueTypeKey, Ty, TyCtxt, TypeFoldable,
TypingMode,
};
use rustc_span::Span;
use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
@ -340,14 +341,13 @@ fn check_opaque_type_well_formed<'tcx>(
parent_def_id = tcx.local_parent(parent_def_id);
}
// FIXME(-Znext-solver): We probably should use `&[]` instead of
// and prepopulate this `InferCtxt` with known opaque values, rather than
// allowing opaque types to be defined and checking them after the fact.
// FIXME(#132279): This should eventually use the already defined hidden types
// instead. Alternatively we'll entirely remove this function given we also check
// the opaque in `check_opaque_meets_bounds` later.
let infcx = tcx
.infer_ctxt()
.with_next_trait_solver(next_trait_solver)
.with_opaque_type_inference(parent_def_id)
.build();
.build(TypingMode::analysis_in_body(tcx, parent_def_id));
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
let identity_args = GenericArgs::identity_for_item(tcx, def_id);
@ -517,7 +517,9 @@ fn get_canonical_args(&self) -> ty::GenericArgsRef<'tcx> {
},
);
let infcx = tcx.infer_ctxt().build();
// FIXME(#132279): It feels wrong to use `non_body_analysis` here given that we're
// in a body here.
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new(&infcx);
let wf_tys = ocx.assumed_wf_types(param_env, parent).unwrap_or_else(|_| {

4
compiler/rustc_codegen_ssa/src/base.rs
View File

@ -21,7 +21,7 @@
use rustc_middle::mir::mono::{CodegenUnit, CodegenUnitNameBuilder, MonoItem};
use rustc_middle::query::Providers;
use rustc_middle::ty::layout::{HasTyCtxt, LayoutOf, TyAndLayout};
use rustc_middle::ty::{self, Instance, Ty, TyCtxt};
use rustc_middle::ty::{self, Instance, Ty, TyCtxt, TypingMode};
use rustc_session::Session;
use rustc_session::config::{self, CrateType, EntryFnType, OptLevel, OutputType};
use rustc_span::symbol::sym;
@ -119,7 +119,7 @@ pub fn validate_trivial_unsize<'tcx>(
) -> bool {
match (source_data.principal(), target_data.principal()) {
(Some(hr_source_principal), Some(hr_target_principal)) => {
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::PostAnalysis);
let universe = infcx.universe();
let ocx = ObligationCtxt::new(&infcx);
infcx.enter_forall(hr_target_principal, |target_principal| {

4
compiler/rustc_const_eval/src/check_consts/check.rs
View File

@ -16,7 +16,7 @@
use rustc_middle::mir::*;
use rustc_middle::span_bug;
use rustc_middle::ty::adjustment::PointerCoercion;
use rustc_middle::ty::{self, Instance, InstanceKind, Ty, TypeVisitableExt};
use rustc_middle::ty::{self, Instance, InstanceKind, Ty, TypeVisitableExt, TypingMode};
use rustc_mir_dataflow::Analysis;
use rustc_mir_dataflow::impls::MaybeStorageLive;
use rustc_mir_dataflow::storage::always_storage_live_locals;
@ -593,7 +593,7 @@ fn visit_terminator(&mut self, terminator: &Terminator<'tcx>, location: Location
// Typeck only does a "non-const" check since it operates on HIR and cannot distinguish
// which path expressions are getting called on and which path expressions are only used
// as function pointers. This is required for correctness.
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
let predicates = tcx.predicates_of(callee).instantiate(tcx, fn_args);

4
compiler/rustc_const_eval/src/check_consts/ops.rs
View File

@ -12,7 +12,7 @@
use rustc_middle::span_bug;
use rustc_middle::ty::print::{PrintTraitRefExt as _, with_no_trimmed_paths};
use rustc_middle::ty::{
self, Closure, FnDef, FnPtr, GenericArgKind, GenericArgsRef, Param, TraitRef, Ty,
self, Closure, FnDef, FnPtr, GenericArgKind, GenericArgsRef, Param, TraitRef, Ty, TypingMode,
suggest_constraining_type_param,
};
use rustc_middle::util::{CallDesugaringKind, CallKind, call_kind};
@ -116,7 +116,7 @@ fn build_error(&self, ccx: &ConstCx<'_, 'tcx>, _: Span) -> Diag<'tcx> {
let obligation =
Obligation::new(tcx, ObligationCause::dummy(), param_env, trait_ref);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
let mut selcx = SelectionContext::new(&infcx);
let implsrc = selcx.select(&obligation);

10
compiler/rustc_const_eval/src/check_consts/qualifs.rs
View File

@ -114,11 +114,11 @@ fn in_any_value_of_ty<'tcx>(cx: &ConstCx<'_, 'tcx>, ty: Ty<'tcx>) -> bool {
ty::TraitRef::new(cx.tcx, freeze_def_id, [ty::GenericArg::from(ty)]),
);
let infcx = cx
.tcx
.infer_ctxt()
.with_opaque_type_inference(cx.body.source.def_id().expect_local())
.build();
// FIXME(#132279): This should eventually use the already defined hidden types.
let infcx = cx.tcx.infer_ctxt().build(ty::TypingMode::analysis_in_body(
cx.tcx,
cx.body.source.def_id().expect_local(),
));
let ocx = ObligationCtxt::new(&infcx);
ocx.register_obligation(obligation);
let errors = ocx.select_all_or_error();

6
compiler/rustc_const_eval/src/interpret/eval_context.rs
View File

@ -9,7 +9,9 @@
use rustc_middle::ty::layout::{
self, FnAbiError, FnAbiOfHelpers, FnAbiRequest, LayoutError, LayoutOfHelpers, TyAndLayout,
};
use rustc_middle::ty::{self, GenericArgsRef, ParamEnv, Ty, TyCtxt, TypeFoldable, Variance};
use rustc_middle::ty::{
self, GenericArgsRef, ParamEnv, Ty, TyCtxt, TypeFoldable, TypingMode, Variance,
};
use rustc_middle::{mir, span_bug};
use rustc_session::Limit;
use rustc_span::Span;
@ -325,7 +327,7 @@ pub(super) fn eq_in_param_env<T>(&self, a: T, b: T) -> bool
return true;
}
// Slow path: spin up an inference context to check if these traits are sufficiently equal.
let infcx = self.tcx.infer_ctxt().build();
let infcx = self.tcx.infer_ctxt().build(TypingMode::from_param_env(self.param_env));
let ocx = ObligationCtxt::new(&infcx);
let cause = ObligationCause::dummy_with_span(self.cur_span());
// equate the two trait refs after normalization

5
compiler/rustc_const_eval/src/util/compare_types.rs
View File

@ -5,7 +5,7 @@
use rustc_infer::infer::TyCtxtInferExt;
use rustc_middle::traits::ObligationCause;
use rustc_middle::ty::{ParamEnv, Ty, TyCtxt, Variance};
use rustc_middle::ty::{ParamEnv, Ty, TyCtxt, TypingMode, Variance};
use rustc_trait_selection::traits::ObligationCtxt;
/// Returns whether the two types are equal up to subtyping.
@ -45,7 +45,8 @@ pub fn relate_types<'tcx>(
}
let mut builder = tcx.infer_ctxt().ignoring_regions();
let infcx = builder.build();
// FIXME(#132279): This should eventually use the already defined hidden types.
let infcx = builder.build(TypingMode::from_param_env(param_env));
let ocx = ObligationCtxt::new(&infcx);
let cause = ObligationCause::dummy();
let src = ocx.normalize(&cause, param_env, src);

8
compiler/rustc_hir_analysis/src/check/check.rs
View File

@ -30,6 +30,7 @@
use rustc_trait_selection::traits::outlives_bounds::InferCtxtExt as _;
use rustc_type_ir::fold::TypeFoldable;
use tracing::{debug, instrument};
use ty::TypingMode;
use {rustc_attr as attr, rustc_hir as hir};
use super::compare_impl_item::{check_type_bounds, compare_impl_method, compare_impl_ty};
@ -276,7 +277,8 @@ fn check_opaque_meets_bounds<'tcx>(
};
let param_env = tcx.param_env(defining_use_anchor);
let infcx = tcx.infer_ctxt().with_opaque_type_inference(defining_use_anchor).build();
// FIXME(#132279): This should eventually use the already defined hidden types.
let infcx = tcx.infer_ctxt().build(TypingMode::analysis_in_body(tcx, defining_use_anchor));
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
let args = match *origin {
@ -1675,8 +1677,8 @@ pub(super) fn check_coroutine_obligations(
// typeck writeback gives us predicates with their regions erased.
// As borrowck already has checked lifetimes, we do not need to do it again.
.ignoring_regions()
.with_opaque_type_inference(def_id)
.build();
// FIXME(#132279): This should eventually use the already defined hidden types.
.build(TypingMode::analysis_in_body(tcx, def_id));
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
for (predicate, cause) in &typeck_results.coroutine_stalled_predicates {

14
compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
View File

@ -17,7 +17,7 @@
use rustc_middle::ty::util::ExplicitSelf;
use rustc_middle::ty::{
self, GenericArgs, GenericParamDefKind, Ty, TyCtxt, TypeFoldable, TypeFolder,
TypeSuperFoldable, TypeVisitableExt, Upcast,
TypeSuperFoldable, TypeVisitableExt, TypingMode, Upcast,
};
use rustc_middle::{bug, span_bug};
use rustc_span::Span;
@ -228,7 +228,7 @@ fn compare_method_predicate_entailment<'tcx>(
let param_env = traits::normalize_param_env_or_error(tcx, param_env, normalize_cause);
debug!(caller_bounds=?param_env.caller_bounds());
let infcx = &tcx.infer_ctxt().build();
let infcx = &tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(infcx);
// Create obligations for each predicate declared by the impl
@ -516,7 +516,7 @@ pub(super) fn collect_return_position_impl_trait_in_trait_tys<'tcx>(
ObligationCause::misc(tcx.def_span(impl_m_def_id), impl_m_def_id),
);
let infcx = &tcx.infer_ctxt().build();
let infcx = &tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(infcx);
// Normalize the impl signature with fresh variables for lifetime inference.
@ -1196,7 +1196,7 @@ fn compare_self_type<'tcx>(
let self_arg_ty = tcx.fn_sig(method.def_id).instantiate_identity().input(0);
let param_env = ty::ParamEnv::reveal_all();
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let self_arg_ty = tcx.liberate_late_bound_regions(method.def_id, self_arg_ty);
let can_eq_self = |ty| infcx.can_eq(param_env, untransformed_self_ty, ty);
match ExplicitSelf::determine(self_arg_ty, can_eq_self) {
@ -1801,7 +1801,7 @@ fn compare_const_predicate_entailment<'tcx>(
ObligationCause::misc(impl_ct_span, impl_ct_def_id),
);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
let impl_ct_own_bounds = impl_ct_predicates.instantiate_own_identity();
@ -1951,7 +1951,7 @@ fn compare_type_predicate_entailment<'tcx>(
let param_env = traits::normalize_param_env_or_error(tcx, param_env, normalize_cause);
debug!(caller_bounds=?param_env.caller_bounds());
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
for (predicate, span) in impl_ty_own_bounds {
@ -2036,7 +2036,7 @@ pub(super) fn check_type_bounds<'tcx>(
let impl_ty_args = GenericArgs::identity_for_item(tcx, impl_ty.def_id);
let rebased_args = impl_ty_args.rebase_onto(tcx, container_id, impl_trait_ref.args);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
// A synthetic impl Trait for RPITIT desugaring or assoc type for effects desugaring has no HIR,

4
compiler/rustc_hir_analysis/src/check/compare_impl_item/refine.rs
View File

@ -8,7 +8,7 @@
use rustc_middle::traits::{ObligationCause, Reveal};
use rustc_middle::ty::{
self, Ty, TyCtxt, TypeFoldable, TypeFolder, TypeSuperVisitable, TypeVisitable,
TypeVisitableExt, TypeVisitor,
TypeVisitableExt, TypeVisitor, TypingMode,
};
use rustc_span::Span;
use rustc_trait_selection::regions::InferCtxtRegionExt;
@ -132,7 +132,7 @@ pub(super) fn check_refining_return_position_impl_trait_in_trait<'tcx>(
let param_env = ty::ParamEnv::new(tcx.mk_clauses_from_iter(hybrid_preds), Reveal::UserFacing);
let param_env = normalize_param_env_or_error(tcx, param_env, ObligationCause::dummy());
let ref infcx = tcx.infer_ctxt().build();
let ref infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new(infcx);
// Normalize the bounds. This has two purposes:

4
compiler/rustc_hir_analysis/src/check/dropck.rs
View File

@ -9,7 +9,7 @@
use rustc_infer::infer::{RegionResolutionError, TyCtxtInferExt};
use rustc_infer::traits::{ObligationCause, ObligationCauseCode};
use rustc_middle::ty::util::CheckRegions;
use rustc_middle::ty::{self, GenericArgsRef, Ty, TyCtxt};
use rustc_middle::ty::{self, GenericArgsRef, Ty, TyCtxt, TypingMode};
use rustc_trait_selection::regions::InferCtxtRegionExt;
use rustc_trait_selection::traits::{self, ObligationCtxt};
@ -124,7 +124,7 @@ fn ensure_drop_predicates_are_implied_by_item_defn<'tcx>(
adt_def_id: LocalDefId,
adt_to_impl_args: GenericArgsRef<'tcx>,
) -> Result<(), ErrorGuaranteed> {
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
let impl_span = tcx.def_span(drop_impl_def_id.to_def_id());

4
compiler/rustc_hir_analysis/src/check/entry.rs
View File

@ -4,7 +4,7 @@
use rustc_hir::Node;
use rustc_infer::infer::TyCtxtInferExt;
use rustc_middle::span_bug;
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_middle::ty::{self, Ty, TyCtxt, TypingMode};
use rustc_session::config::EntryFnType;
use rustc_span::Span;
use rustc_span::def_id::{CRATE_DEF_ID, DefId, LocalDefId};
@ -128,7 +128,7 @@ fn main_fn_return_type_span(tcx: TyCtxt<'_>, def_id: DefId) -> Option<Span> {
tcx.dcx().emit_err(errors::MainFunctionReturnTypeGeneric { span: return_ty_span });
return;
};
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let cause = traits::ObligationCause::new(
return_ty_span,
main_diagnostics_def_id,

6
compiler/rustc_hir_analysis/src/check/mod.rs
View File

@ -85,7 +85,7 @@
use rustc_infer::traits::ObligationCause;
use rustc_middle::query::Providers;
use rustc_middle::ty::error::{ExpectedFound, TypeError};
use rustc_middle::ty::{self, GenericArgs, GenericArgsRef, Ty, TyCtxt};
use rustc_middle::ty::{self, GenericArgs, GenericArgsRef, Ty, TyCtxt, TypingMode};
use rustc_middle::{bug, span_bug};
use rustc_session::parse::feature_err;
use rustc_span::def_id::CRATE_DEF_ID;
@ -530,7 +530,7 @@ fn suggestion_signature<'tcx>(
let ty = tcx.type_of(assoc.def_id).instantiate_identity();
let val = tcx
.infer_ctxt()
.build()
.build(TypingMode::non_body_analysis())
.err_ctxt()
.ty_kind_suggestion(tcx.param_env(assoc.def_id), ty)
.unwrap_or_else(|| "value".to_string());
@ -620,7 +620,7 @@ fn extract_span_for_error_reporting<'tcx>(
let param_env = ty::ParamEnv::empty();
let infcx = &tcx.infer_ctxt().build();
let infcx = &tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(infcx);
let actual_sig = tcx.fn_sig(fn_id).instantiate_identity();

6
compiler/rustc_hir_analysis/src/check/wfcheck.rs
View File

@ -17,7 +17,7 @@
use rustc_middle::ty::trait_def::TraitSpecializationKind;
use rustc_middle::ty::{
self, AdtKind, GenericArgKind, GenericArgs, GenericParamDefKind, Ty, TyCtxt, TypeFoldable,
TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor, Upcast,
TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor, TypingMode, Upcast,
};
use rustc_middle::{bug, span_bug};
use rustc_session::parse::feature_err;
@ -106,7 +106,7 @@ pub(super) fn enter_wf_checking_ctxt<'tcx, F>(
F: for<'a> FnOnce(&WfCheckingCtxt<'a, 'tcx>) -> Result<(), ErrorGuaranteed>,
{
let param_env = tcx.param_env(body_def_id);
let infcx = &tcx.infer_ctxt().build();
let infcx = &tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(infcx);
let mut wfcx = WfCheckingCtxt { ocx, span, body_def_id, param_env };
@ -765,7 +765,7 @@ fn test_region_obligations<'tcx>(
// Unfortunately, we have to use a new `InferCtxt` each call, because
// region constraints get added and solved there and we need to test each
// call individually.
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
add_constraints(&infcx);

8
compiler/rustc_hir_analysis/src/coherence/builtin.rs
View File

@ -15,7 +15,9 @@
use rustc_infer::traits::Obligation;
use rustc_middle::ty::adjustment::CoerceUnsizedInfo;
use rustc_middle::ty::print::PrintTraitRefExt as _;
use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt, suggest_constraining_type_params};
use rustc_middle::ty::{
self, Ty, TyCtxt, TypeVisitableExt, TypingMode, suggest_constraining_type_params,
};
use rustc_span::{DUMMY_SP, Span};
use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
use rustc_trait_selection::traits::misc::{
@ -213,7 +215,7 @@ fn visit_implementation_of_dispatch_from_dyn(checker: &Checker<'_>) -> Result<()
let param_env = tcx.param_env(impl_did);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let cause = ObligationCause::misc(span, impl_did);
// Later parts of the compiler rely on all DispatchFromDyn types to be ABI-compatible with raw
@ -354,7 +356,7 @@ pub(crate) fn coerce_unsized_info<'tcx>(
debug!("visit_implementation_of_coerce_unsized: {:?} -> {:?} (free)", source, target);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let cause = ObligationCause::misc(span, impl_did);
let check_mutbl = |mt_a: ty::TypeAndMut<'tcx>,
mt_b: ty::TypeAndMut<'tcx>,

4
compiler/rustc_hir_analysis/src/coherence/orphan.rs
View File

@ -7,7 +7,7 @@
use rustc_lint_defs::builtin::UNCOVERED_PARAM_IN_PROJECTION;
use rustc_middle::ty::{
self, Ty, TyCtxt, TypeFoldable, TypeFolder, TypeSuperFoldable, TypeSuperVisitable,
TypeVisitable, TypeVisitableExt, TypeVisitor,
TypeVisitable, TypeVisitableExt, TypeVisitor, TypingMode,
};
use rustc_middle::{bug, span_bug};
use rustc_span::def_id::{DefId, LocalDefId};
@ -302,7 +302,7 @@ fn orphan_check<'tcx>(
}
// (1) Instantiate all generic params with fresh inference vars.
let infcx = tcx.infer_ctxt().intercrate(true).build();
let infcx = tcx.infer_ctxt().build(TypingMode::Coherence);
let cause = traits::ObligationCause::dummy();
let args = infcx.fresh_args_for_item(cause.span, impl_def_id.to_def_id());
let trait_ref = trait_ref.instantiate(tcx, args);

10
compiler/rustc_hir_analysis/src/collect.rs
View File

@ -34,7 +34,7 @@
use rustc_middle::hir::nested_filter;
use rustc_middle::query::Providers;
use rustc_middle::ty::util::{Discr, IntTypeExt};
use rustc_middle::ty::{self, AdtKind, Const, IsSuggestable, Ty, TyCtxt};
use rustc_middle::ty::{self, AdtKind, Const, IsSuggestable, Ty, TyCtxt, TypingMode};
use rustc_middle::{bug, span_bug};
use rustc_span::symbol::{Ident, Symbol, kw, sym};
use rustc_span::{DUMMY_SP, Span};
@ -1438,9 +1438,11 @@ fn infer_return_ty_for_fn_sig<'tcx>(
Applicability::MachineApplicable,
);
recovered_ret_ty = Some(suggestable_ret_ty);
} else if let Some(sugg) =
suggest_impl_trait(&tcx.infer_ctxt().build(), tcx.param_env(def_id), ret_ty)
{
} else if let Some(sugg) = suggest_impl_trait(
&tcx.infer_ctxt().build(TypingMode::non_body_analysis()),
tcx.param_env(def_id),
ret_ty,
) {
diag.span_suggestion(
ty.span,
"replace with an appropriate return type",

6
compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs
View File

@ -39,7 +39,7 @@
use rustc_middle::ty::print::PrintPolyTraitRefExt as _;
use rustc_middle::ty::{
self, Const, GenericArgKind, GenericArgsRef, GenericParamDefKind, ParamEnv, Ty, TyCtxt,
TypeVisitableExt,
TypeVisitableExt, TypingMode,
};
use rustc_middle::{bug, span_bug};
use rustc_session::lint::builtin::AMBIGUOUS_ASSOCIATED_ITEMS;
@ -1300,7 +1300,7 @@ fn probe_inherent_assoc_ty(
Some(infcx) => infcx,
None => {
assert!(!self_ty.has_infer());
infcx_ = tcx.infer_ctxt().ignoring_regions().build();
infcx_ = tcx.infer_ctxt().ignoring_regions().build(TypingMode::non_body_analysis());
&infcx_
}
};
@ -1492,7 +1492,7 @@ fn probe_traits_that_match_assoc_ty(
infcx
} else {
assert!(!qself_ty.has_infer());
infcx_ = tcx.infer_ctxt().build();
infcx_ = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
&infcx_
};

4
compiler/rustc_hir_analysis/src/hir_wf_check.rs
View File

@ -5,7 +5,7 @@
use rustc_infer::traits::{ObligationCause, WellFormedLoc};
use rustc_middle::bug;
use rustc_middle::query::Providers;
use rustc_middle::ty::{self, TyCtxt};
use rustc_middle::ty::{self, TyCtxt, TypingMode};
use rustc_span::def_id::LocalDefId;
use rustc_trait_selection::traits::{self, ObligationCtxt};
use tracing::debug;
@ -68,7 +68,7 @@ struct HirWfCheck<'tcx> {
impl<'tcx> Visitor<'tcx> for HirWfCheck<'tcx> {
fn visit_ty(&mut self, ty: &'tcx hir::Ty<'tcx>) {
let infcx = self.tcx.infer_ctxt().build();
let infcx = self.tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
let tcx_ty = self.icx.lower_ty(ty);

8
compiler/rustc_hir_analysis/src/impl_wf_check/min_specialization.rs
View File

@ -72,7 +72,9 @@
use rustc_infer::infer::outlives::env::OutlivesEnvironment;
use rustc_infer::traits::specialization_graph::Node;
use rustc_middle::ty::trait_def::TraitSpecializationKind;
use rustc_middle::ty::{self, GenericArg, GenericArgs, GenericArgsRef, TyCtxt, TypeVisitableExt};
use rustc_middle::ty::{
self, GenericArg, GenericArgs, GenericArgsRef, TyCtxt, TypeVisitableExt, TypingMode,
};
use rustc_span::{ErrorGuaranteed, Span};
use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
use rustc_trait_selection::traits::outlives_bounds::InferCtxtExt as _;
@ -195,7 +197,7 @@ fn get_impl_args(
impl1_def_id: LocalDefId,
impl2_node: Node,
) -> Result<(GenericArgsRef<'_>, GenericArgsRef<'_>), ErrorGuaranteed> {
let infcx = &tcx.infer_ctxt().build();
let infcx = &tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(infcx);
let param_env = tcx.param_env(impl1_def_id);
let impl1_span = tcx.def_span(impl1_def_id);
@ -409,7 +411,7 @@ fn check_predicates<'tcx>(
// Include the well-formed predicates of the type parameters of the impl.
for arg in tcx.impl_trait_ref(impl1_def_id).unwrap().instantiate_identity().args {
let infcx = &tcx.infer_ctxt().build();
let infcx = &tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let obligations =
wf::obligations(infcx, tcx.param_env(impl1_def_id), impl1_def_id, 0, arg, span)
.unwrap();

5
compiler/rustc_hir_typeck/src/typeck_root_ctxt.rs
View File

@ -8,7 +8,7 @@
use rustc_infer::infer::{InferCtxt, InferOk, TyCtxtInferExt};
use rustc_middle::span_bug;
use rustc_middle::ty::visit::TypeVisitableExt;
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_middle::ty::{self, Ty, TyCtxt, TypingMode};
use rustc_span::Span;
use rustc_span::def_id::LocalDefIdMap;
use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt;
@ -81,7 +81,8 @@ impl<'tcx> TypeckRootCtxt<'tcx> {
pub(crate) fn new(tcx: TyCtxt<'tcx>, def_id: LocalDefId) -> Self {
let hir_owner = tcx.local_def_id_to_hir_id(def_id).owner;
let infcx = tcx.infer_ctxt().ignoring_regions().with_opaque_type_inference(def_id).build();
let infcx =
tcx.infer_ctxt().ignoring_regions().build(TypingMode::analysis_in_body(tcx, def_id));
let typeck_results = RefCell::new(ty::TypeckResults::new(hir_owner));
TypeckRootCtxt {

38
compiler/rustc_infer/src/infer/at.rs
View File

@ -28,7 +28,7 @@
use relate::lattice::{LatticeOp, LatticeOpKind};
use rustc_middle::bug;
use rustc_middle::ty::relate::solver_relating::RelateExt as NextSolverRelate;
use rustc_middle::ty::{Const, ImplSubject};
use rustc_middle::ty::{Const, ImplSubject, TypingMode};
use super::*;
use crate::infer::relate::type_relating::TypeRelating;
@ -67,16 +67,9 @@ pub fn at<'a>(
/// variables in the same state. This can be used to "branch off" many tests from the same
/// common state.
pub fn fork(&self) -> Self {
self.fork_with_intercrate(self.intercrate)
}
/// Forks the inference context, creating a new inference context with the same inference
/// variables in the same state, except possibly changing the intercrate mode. This can be
/// used to "branch off" many tests from the same common state. Used in negative coherence.
pub fn fork_with_intercrate(&self, intercrate: bool) -> Self {
Self {
tcx: self.tcx,
defining_opaque_types: self.defining_opaque_types,
typing_mode: self.typing_mode,
considering_regions: self.considering_regions,
skip_leak_check: self.skip_leak_check,
inner: self.inner.clone(),
@ -87,11 +80,36 @@ pub fn fork_with_intercrate(&self, intercrate: bool) -> Self {
reported_signature_mismatch: self.reported_signature_mismatch.clone(),
tainted_by_errors: self.tainted_by_errors.clone(),
universe: self.universe.clone(),
intercrate,
next_trait_solver: self.next_trait_solver,
obligation_inspector: self.obligation_inspector.clone(),
}
}
/// Forks the inference context, creating a new inference context with the same inference
/// variables in the same state, except possibly changing the intercrate mode. This can be
/// used to "branch off" many tests from the same common state. Used in negative coherence.
pub fn fork_with_typing_mode(&self, typing_mode: TypingMode<'tcx>) -> Self {
// Unlike `fork`, this invalidates all cache entries as they may depend on the
// typing mode.
let forked = Self {
tcx: self.tcx,
typing_mode,
considering_regions: self.considering_regions,
skip_leak_check: self.skip_leak_check,
inner: self.inner.clone(),
lexical_region_resolutions: self.lexical_region_resolutions.clone(),
selection_cache: Default::default(),
evaluation_cache: Default::default(),
reported_trait_errors: self.reported_trait_errors.clone(),
reported_signature_mismatch: self.reported_signature_mismatch.clone(),
tainted_by_errors: self.tainted_by_errors.clone(),
universe: self.universe.clone(),
next_trait_solver: self.next_trait_solver,
obligation_inspector: self.obligation_inspector.clone(),
};
forked.inner.borrow_mut().projection_cache().clear();
forked
}
}
pub trait ToTrace<'tcx>: Relate<TyCtxt<'tcx>> + Copy {

6
compiler/rustc_infer/src/infer/canonical/canonicalizer.rs
View File

@ -46,7 +46,7 @@ pub fn canonicalize_query<V>(
V: TypeFoldable<TyCtxt<'tcx>>,
{
let (param_env, value) = value.into_parts();
let param_env = self.tcx.canonical_param_env_cache.get_or_insert(
let canonical_param_env = self.tcx.canonical_param_env_cache.get_or_insert(
self.tcx,
param_env,
query_state,
@ -64,7 +64,7 @@ pub fn canonicalize_query<V>(
);
let canonical = Canonicalizer::canonicalize_with_base(
param_env,
canonical_param_env,
value,
Some(self),
self.tcx,
@ -72,7 +72,7 @@ pub fn canonicalize_query<V>(
query_state,
)
.unchecked_map(|(param_env, value)| param_env.and(value));
CanonicalQueryInput { canonical, defining_opaque_types: self.defining_opaque_types() }
CanonicalQueryInput { canonical, typing_mode: self.typing_mode(param_env) }
}
/// Canonicalizes a query *response* `V`. When we canonicalize a

17
compiler/rustc_infer/src/infer/context.rs
View File

@ -1,7 +1,6 @@
///! Definition of `InferCtxtLike` from the librarified type layer.
use rustc_hir::def_id::{DefId, LocalDefId};
use rustc_hir::def_id::DefId;
use rustc_middle::traits::ObligationCause;
use rustc_middle::traits::solve::SolverMode;
use rustc_middle::ty::fold::TypeFoldable;
use rustc_middle::ty::relate::RelateResult;
use rustc_middle::ty::relate::combine::PredicateEmittingRelation;
@ -21,11 +20,11 @@ fn next_trait_solver(&self) -> bool {
self.next_trait_solver
}
fn solver_mode(&self) -> ty::solve::SolverMode {
match self.intercrate {
true => SolverMode::Coherence,
false => SolverMode::Normal,
}
fn typing_mode(
&self,
param_env_for_debug_assertion: ty::ParamEnv<'tcx>,
) -> ty::TypingMode<'tcx> {
self.typing_mode(param_env_for_debug_assertion)
}
fn universe(&self) -> ty::UniverseIndex {
@ -91,10 +90,6 @@ fn opportunistic_resolve_lt_var(&self, vid: ty::RegionVid) -> ty::Region<'tcx> {
self.inner.borrow_mut().unwrap_region_constraints().opportunistic_resolve_var(self.tcx, vid)
}
fn defining_opaque_types(&self) -> &'tcx ty::List<LocalDefId> {
self.defining_opaque_types()
}
fn next_ty_infer(&self) -> Ty<'tcx> {
self.next_ty_var(DUMMY_SP)
}

99
compiler/rustc_infer/src/infer/mod.rs
View File

@ -38,11 +38,12 @@
use rustc_middle::ty::visit::TypeVisitableExt;
use rustc_middle::ty::{
self, ConstVid, FloatVid, GenericArg, GenericArgKind, GenericArgs, GenericArgsRef,
GenericParamDefKind, InferConst, IntVid, Ty, TyCtxt, TyVid,
GenericParamDefKind, InferConst, IntVid, Ty, TyCtxt, TyVid, TypingMode,
};
use rustc_middle::{bug, span_bug};
use rustc_span::Span;
use rustc_span::symbol::Symbol;
use rustc_type_ir::solve::Reveal;
use snapshot::undo_log::InferCtxtUndoLogs;
use tracing::{debug, instrument};
use type_variable::TypeVariableOrigin;
@ -243,8 +244,9 @@ pub fn iter_opaque_types(
pub struct InferCtxt<'tcx> {
pub tcx: TyCtxt<'tcx>,
/// The `DefIds` of the opaque types that may have their hidden types constrained.
defining_opaque_types: &'tcx ty::List<LocalDefId>,
/// The mode of this inference context, see the struct documentation
/// for more details.
typing_mode: TypingMode<'tcx>,
/// Whether this inference context should care about region obligations in
/// the root universe. Most notably, this is used during hir typeck as region
@ -296,26 +298,6 @@ pub struct InferCtxt<'tcx> {
/// bound.
universe: Cell<ty::UniverseIndex>,
/// During coherence we have to assume that other crates may add
/// additional impls which we currently don't know about.
///
/// To deal with this evaluation, we should be conservative
/// and consider the possibility of impls from outside this crate.
/// This comes up primarily when resolving ambiguity. Imagine
/// there is some trait reference `$0: Bar` where `$0` is an
/// inference variable. If `intercrate` is true, then we can never
/// say for sure that this reference is not implemented, even if
/// there are *no impls at all for `Bar`*, because `$0` could be
/// bound to some type that in a downstream crate that implements
/// `Bar`.
///
/// Outside of coherence, we set this to false because we are only
/// interested in types that the user could actually have written.
/// In other words, we consider `$0: Bar` to be unimplemented if
/// there is no type that the user could *actually name* that
/// would satisfy it. This avoids crippling inference, basically.
pub intercrate: bool,
next_trait_solver: bool,
pub obligation_inspector: Cell<Option<ObligationInspector<'tcx>>>,
@ -529,11 +511,8 @@ pub struct RegionObligation<'tcx> {
/// Used to configure inference contexts before their creation.
pub struct InferCtxtBuilder<'tcx> {
tcx: TyCtxt<'tcx>,
defining_opaque_types: &'tcx ty::List<LocalDefId>,
considering_regions: bool,
skip_leak_check: bool,
/// Whether we are in coherence mode.
intercrate: bool,
/// Whether we should use the new trait solver in the local inference context,
/// which affects things like which solver is used in `predicate_may_hold`.
next_trait_solver: bool,
@ -544,37 +523,19 @@ impl<'tcx> TyCtxt<'tcx> {
fn infer_ctxt(self) -> InferCtxtBuilder<'tcx> {
InferCtxtBuilder {
tcx: self,
defining_opaque_types: ty::List::empty(),
considering_regions: true,
skip_leak_check: false,
intercrate: false,
next_trait_solver: self.next_trait_solver_globally(),
}
}
}
impl<'tcx> InferCtxtBuilder<'tcx> {
/// Whenever the `InferCtxt` should be able to handle defining uses of opaque types,
/// you need to call this function. Otherwise the opaque type will be treated opaquely.
///
/// It is only meant to be called in two places, for typeck
/// (via `Inherited::build`) and for the inference context used
/// in mir borrowck.
pub fn with_opaque_type_inference(mut self, defining_anchor: LocalDefId) -> Self {
self.defining_opaque_types = self.tcx.opaque_types_defined_by(defining_anchor);
self
}
pub fn with_next_trait_solver(mut self, next_trait_solver: bool) -> Self {
self.next_trait_solver = next_trait_solver;
self
}
pub fn intercrate(mut self, intercrate: bool) -> Self {
self.intercrate = intercrate;
self
}
pub fn ignoring_regions(mut self) -> Self {
self.considering_regions = false;
self
@ -600,24 +561,17 @@ pub fn build_with_canonical<T>(
where
T: TypeFoldable<TyCtxt<'tcx>>,
{
self.defining_opaque_types = input.defining_opaque_types;
let infcx = self.build();
let infcx = self.build(input.typing_mode);
let (value, args) = infcx.instantiate_canonical(span, &input.canonical);
(infcx, value, args)
}
pub fn build(&mut self) -> InferCtxt<'tcx> {
let InferCtxtBuilder {
tcx,
defining_opaque_types,
considering_regions,
skip_leak_check,
intercrate,
next_trait_solver,
} = *self;
pub fn build(&mut self, typing_mode: TypingMode<'tcx>) -> InferCtxt<'tcx> {
let InferCtxtBuilder { tcx, considering_regions, skip_leak_check, next_trait_solver } =
*self;
InferCtxt {
tcx,
defining_opaque_types,
typing_mode,
considering_regions,
skip_leak_check,
inner: RefCell::new(InferCtxtInner::new()),
@ -628,7 +582,6 @@ pub fn build(&mut self) -> InferCtxt<'tcx> {
reported_signature_mismatch: Default::default(),
tainted_by_errors: Cell::new(None),
universe: Cell::new(ty::UniverseIndex::ROOT),
intercrate,
next_trait_solver,
obligation_inspector: Cell::new(None),
}
@ -659,14 +612,30 @@ pub fn dcx(&self) -> DiagCtxtHandle<'_> {
self.tcx.dcx().taintable_handle(&self.tainted_by_errors)
}
pub fn defining_opaque_types(&self) -> &'tcx ty::List<LocalDefId> {
self.defining_opaque_types
}
pub fn next_trait_solver(&self) -> bool {
self.next_trait_solver
}
#[inline(always)]
pub fn typing_mode(
&self,
param_env_for_debug_assertion: ty::ParamEnv<'tcx>,
) -> TypingMode<'tcx> {
if cfg!(debug_assertions) {
match (param_env_for_debug_assertion.reveal(), self.typing_mode) {
(Reveal::All, TypingMode::PostAnalysis)
| (Reveal::UserFacing, TypingMode::Coherence | TypingMode::Analysis { .. }) => {}
(r, t) => unreachable!("TypingMode x Reveal mismatch: {r:?} {t:?}"),
}
}
self.typing_mode
}
#[inline(always)]
pub fn typing_mode_unchecked(&self) -> TypingMode<'tcx> {
self.typing_mode
}
pub fn freshen<T: TypeFoldable<TyCtxt<'tcx>>>(&self, t: T) -> T {
t.fold_with(&mut self.freshener())
}
@ -1029,8 +998,12 @@ pub fn clone_opaque_types(&self) -> opaque_types::OpaqueTypeMap<'tcx> {
#[inline(always)]
pub fn can_define_opaque_ty(&self, id: impl Into<DefId>) -> bool {
let Some(id) = id.into().as_local() else { return false };
self.defining_opaque_types.contains(&id)
match self.typing_mode_unchecked() {
TypingMode::Analysis { defining_opaque_types } => {
id.into().as_local().is_some_and(|def_id| defining_opaque_types.contains(&def_id))
}
TypingMode::Coherence | TypingMode::PostAnalysis => false,
}
}
pub fn ty_to_string(&self, t: Ty<'tcx>) -> String {

49
compiler/rustc_infer/src/infer/opaque_types/mod.rs
View File

@ -2,6 +2,7 @@
use rustc_data_structures::fx::FxIndexMap;
use rustc_data_structures::sync::Lrc;
use rustc_hir as hir;
use rustc_middle::bug;
use rustc_middle::traits::ObligationCause;
use rustc_middle::traits::solve::Goal;
use rustc_middle::ty::error::{ExpectedFound, TypeError};
@ -100,7 +101,7 @@ pub fn handle_opaque_type(
let process = |a: Ty<'tcx>, b: Ty<'tcx>| match *a.kind() {
ty::Alias(ty::Opaque, ty::AliasTy { def_id, args, .. }) if def_id.is_local() => {
let def_id = def_id.expect_local();
if self.intercrate {
if let ty::TypingMode::Coherence = self.typing_mode(param_env) {
// See comment on `insert_hidden_type` for why this is sufficient in coherence
return Some(self.register_hidden_type(
OpaqueTypeKey { def_id, args },
@ -519,28 +520,32 @@ pub fn insert_hidden_type(
// value being folded. In simple cases like `-> impl Foo`,
// these are the same span, but not in cases like `-> (impl
// Foo, impl Bar)`.
if self.intercrate {
// During intercrate we do not define opaque types but instead always
// force ambiguity unless the hidden type is known to not implement
// our trait.
goals.push(Goal::new(self.tcx, param_env, ty::PredicateKind::Ambiguous))
} else {
let prev = self
.inner
.borrow_mut()
.opaque_types()
.register(opaque_type_key, OpaqueHiddenType { ty: hidden_ty, span });
if let Some(prev) = prev {
goals.extend(
self.at(&ObligationCause::dummy_with_span(span), param_env)
.eq(DefineOpaqueTypes::Yes, prev, hidden_ty)?
.obligations
.into_iter()
// FIXME: Shuttling between obligations and goals is awkward.
.map(Goal::from),
);
match self.typing_mode(param_env) {
ty::TypingMode::Coherence => {
// During intercrate we do not define opaque types but instead always
// force ambiguity unless the hidden type is known to not implement
// our trait.
goals.push(Goal::new(self.tcx, param_env, ty::PredicateKind::Ambiguous));
}
};
ty::TypingMode::Analysis { .. } => {
let prev = self
.inner
.borrow_mut()
.opaque_types()
.register(opaque_type_key, OpaqueHiddenType { ty: hidden_ty, span });
if let Some(prev) = prev {
goals.extend(
self.at(&ObligationCause::dummy_with_span(span), param_env)
.eq(DefineOpaqueTypes::Yes, prev, hidden_ty)?
.obligations
.into_iter()
// FIXME: Shuttling between obligations and goals is awkward.
.map(Goal::from),
);
}
}
ty::TypingMode::PostAnalysis => bug!("insert hidden type post-analysis"),
}
Ok(())
}

11
compiler/rustc_infer/src/infer/relate/generalize.rs
View File

@ -9,6 +9,7 @@
use rustc_middle::ty::visit::MaxUniverse;
use rustc_middle::ty::{
self, AliasRelationDirection, InferConst, Term, Ty, TyCtxt, TypeVisitable, TypeVisitableExt,
TypingMode,
};
use rustc_span::Span;
use tracing::{debug, instrument, warn};
@ -519,7 +520,10 @@ fn tys(&mut self, t: Ty<'tcx>, t2: Ty<'tcx>) -> RelateResult<'tcx, Ty<'tcx>> {
//
// cc trait-system-refactor-initiative#108
if self.infcx.next_trait_solver()
&& !self.infcx.intercrate
&& !matches!(
self.infcx.typing_mode_unchecked(),
TypingMode::Coherence
)
&& self.in_alias
{
inner.type_variables().equate(vid, new_var_id);
@ -650,7 +654,10 @@ fn consts(
// See the comment for type inference variables
// for more details.
if self.infcx.next_trait_solver()
&& !self.infcx.intercrate
&& !matches!(
self.infcx.typing_mode_unchecked(),
TypingMode::Coherence
)
&& self.in_alias
{
variable_table.union(vid, new_var_id);

8
compiler/rustc_lint/src/builtin.rs
View File

@ -31,7 +31,7 @@
use rustc_middle::lint::in_external_macro;
use rustc_middle::ty::layout::LayoutOf;
use rustc_middle::ty::print::with_no_trimmed_paths;
use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt, Upcast, VariantDef};
use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt, TypingMode, Upcast, VariantDef};
use rustc_session::lint::FutureIncompatibilityReason;
// hardwired lints from rustc_lint_defs
pub use rustc_session::lint::builtin::*;
@ -604,7 +604,7 @@ fn check_item(&mut self, cx: &LateContext<'_>, item: &hir::Item<'_>) {
&& cx
.tcx
.infer_ctxt()
.build()
.build(cx.typing_mode())
.type_implements_trait(iter_trait, [ty], cx.param_env)
.must_apply_modulo_regions()
{
@ -648,7 +648,9 @@ fn type_implements_negative_copy_modulo_regions<'tcx>(
predicate: pred.upcast(tcx),
};
tcx.infer_ctxt().build().predicate_must_hold_modulo_regions(&obligation)
tcx.infer_ctxt()
.build(TypingMode::non_body_analysis())
.predicate_must_hold_modulo_regions(&obligation)
}
declare_lint! {

12
compiler/rustc_lint/src/context.rs
View File

@ -14,11 +14,12 @@
use rustc_hir::def::Res;
use rustc_hir::def_id::{CrateNum, DefId};
use rustc_hir::definitions::{DefPathData, DisambiguatedDefPathData};
use rustc_infer::traits::Reveal;
use rustc_middle::bug;
use rustc_middle::middle::privacy::EffectiveVisibilities;
use rustc_middle::ty::layout::{LayoutError, LayoutOfHelpers, TyAndLayout};
use rustc_middle::ty::print::{PrintError, PrintTraitRefExt as _, Printer, with_no_trimmed_paths};
use rustc_middle::ty::{self, GenericArg, RegisteredTools, Ty, TyCtxt};
use rustc_middle::ty::{self, GenericArg, RegisteredTools, Ty, TyCtxt, TypingMode};
use rustc_session::lint::{
BuiltinLintDiag, FutureIncompatibleInfo, Level, Lint, LintBuffer, LintExpectationId, LintId,
};
@ -698,6 +699,15 @@ fn get_lint_level(&self, lint: &'static Lint) -> Level {
}
impl<'tcx> LateContext<'tcx> {
/// The typing mode of the currently visited node. Use this when
/// building a new `InferCtxt`.
pub fn typing_mode(&self) -> TypingMode<'tcx> {
debug_assert_eq!(self.param_env.reveal(), Reveal::UserFacing);
// FIXME(#132279): In case we're in a body, we should use a typing
// mode which reveals the opaque types defined by that body.
TypingMode::non_body_analysis()
}
/// Gets the type-checking results for the current body,
/// or `None` if outside a body.
pub fn maybe_typeck_results(&self) -> Option<&'tcx ty::TypeckResults<'tcx>> {

2
compiler/rustc_lint/src/for_loops_over_fallibles.rs
View File

@ -166,7 +166,7 @@ fn suggest_question_mark<'tcx>(
}
let ty = args.type_at(0);
let infcx = cx.tcx.infer_ctxt().build();
let infcx = cx.tcx.infer_ctxt().build(cx.typing_mode());
let ocx = ObligationCtxt::new(&infcx);
let body_def_id = cx.tcx.hir().body_owner_def_id(body_id);

4
compiler/rustc_lint/src/impl_trait_overcaptures.rs
View File

@ -15,7 +15,7 @@
Relate, RelateResult, TypeRelation, structurally_relate_consts, structurally_relate_tys,
};
use rustc_middle::ty::{
self, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor,
self, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor, TypingMode,
};
use rustc_middle::{bug, span_bug};
use rustc_session::lint::FutureIncompatibilityReason;
@ -184,7 +184,7 @@ fn check_fn(tcx: TyCtxt<'_>, parent_def_id: LocalDefId) {
}),
outlives_env: LazyCell::new(|| {
let param_env = tcx.param_env(parent_def_id);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
let ocx = ObligationCtxt::new(&infcx);
let assumed_wf_tys = ocx.assumed_wf_types(param_env, parent_def_id).unwrap_or_default();
let implied_bounds =

2
compiler/rustc_lint/src/non_fmt_panic.rs
View File

@ -157,7 +157,7 @@ fn check_panic<'tcx>(cx: &LateContext<'tcx>, f: &'tcx hir::Expr<'tcx>, arg: &'tc
Some(ty_def) if cx.tcx.is_lang_item(ty_def.did(), LangItem::String),
);
let infcx = cx.tcx.infer_ctxt().build();
let infcx = cx.tcx.infer_ctxt().build(cx.typing_mode());
let suggest_display = is_str
|| cx.tcx.get_diagnostic_item(sym::Display).is_some_and(|t| {
infcx.type_implements_trait(t, [ty], cx.param_env).may_apply()

2
compiler/rustc_lint/src/opaque_hidden_inferred_bound.rs
View File

@ -85,7 +85,7 @@ fn check_ty(&mut self, cx: &LateContext<'tcx>, ty: &'tcx hir::Ty<'tcx>) {
}
let def_id = opaque.def_id.to_def_id();
let infcx = &cx.tcx.infer_ctxt().build();
let infcx = &cx.tcx.infer_ctxt().build(cx.typing_mode());
// For every projection predicate in the opaque type's explicit bounds,
// check that the type that we're assigning actually satisfies the bounds
// of the associated type.

2
compiler/rustc_middle/src/query/plumbing.rs
View File

@ -323,7 +323,7 @@ pub fn provided_to_erased<'tcx>(
// Increase this limit if necessary, but do try to keep the size low if possible
#[cfg(target_pointer_width = "64")]
const _: () = {
if mem::size_of::<Key<'static>>() > 72 {
if mem::size_of::<Key<'static>>() > 80 {
panic!("{}", concat!(
"the query `",
stringify!($name),

18
compiler/rustc_middle/src/ty/context.rs
View File

@ -54,7 +54,6 @@
use rustc_type_ir::fold::TypeFoldable;
use rustc_type_ir::lang_items::TraitSolverLangItem;
pub use rustc_type_ir::lift::Lift;
use rustc_type_ir::solve::SolverMode;
use rustc_type_ir::{CollectAndApply, Interner, TypeFlags, WithCachedTypeInfo, search_graph};
use tracing::{debug, trace};
@ -170,15 +169,8 @@ fn get_tracked<T: fmt::Debug + Clone>(self, tracked: &Self::Tracked<T>) -> T {
tracked.get(self)
}
fn with_global_cache<R>(
self,
mode: SolverMode,
f: impl FnOnce(&mut search_graph::GlobalCache<Self>) -> R,
) -> R {
match mode {
SolverMode::Normal => f(&mut *self.new_solver_evaluation_cache.lock()),
SolverMode::Coherence => f(&mut *self.new_solver_coherence_evaluation_cache.lock()),
}
fn with_global_cache<R>(self, f: impl FnOnce(&mut search_graph::GlobalCache<Self>) -> R) -> R {
f(&mut *self.new_solver_evaluation_cache.lock())
}
fn evaluation_is_concurrent(&self) -> bool {
@ -629,6 +621,10 @@ fn anonymize_bound_vars<T: TypeFoldable<TyCtxt<'tcx>>>(
) -> ty::Binder<'tcx, T> {
self.anonymize_bound_vars(binder)
}
fn opaque_types_defined_by(self, defining_anchor: LocalDefId) -> Self::DefiningOpaqueTypes {
self.opaque_types_defined_by(defining_anchor)
}
}
macro_rules! bidirectional_lang_item_map {
@ -1334,7 +1330,6 @@ pub struct GlobalCtxt<'tcx> {
/// Caches the results of goal evaluation in the new solver.
pub new_solver_evaluation_cache: Lock<search_graph::GlobalCache<TyCtxt<'tcx>>>,
pub new_solver_coherence_evaluation_cache: Lock<search_graph::GlobalCache<TyCtxt<'tcx>>>,
pub canonical_param_env_cache: CanonicalParamEnvCache<'tcx>,
@ -1561,7 +1556,6 @@ pub fn create_global_ctxt(
selection_cache: Default::default(),
evaluation_cache: Default::default(),
new_solver_evaluation_cache: Default::default(),
new_solver_coherence_evaluation_cache: Default::default(),
canonical_param_env_cache: Default::default(),
data_layout,
alloc_map: Lock::new(interpret::AllocMap::new()),

2
compiler/rustc_middle/src/ty/mod.rs
View File

@ -100,7 +100,7 @@
pub use self::sty::{
AliasTy, Article, Binder, BoundTy, BoundTyKind, BoundVariableKind, CanonicalPolyFnSig,
CoroutineArgsExt, EarlyBinder, FnSig, InlineConstArgs, InlineConstArgsParts, ParamConst,
ParamTy, PolyFnSig, TyKind, TypeAndMut, UpvarArgs,
ParamTy, PolyFnSig, TyKind, TypeAndMut, TypingMode, UpvarArgs,
};
pub use self::trait_def::TraitDef;
pub use self::typeck_results::{

1
compiler/rustc_middle/src/ty/sty.rs
View File

@ -40,6 +40,7 @@
pub type FnSig<'tcx> = ir::FnSig<TyCtxt<'tcx>>;
pub type Binder<'tcx, T> = ir::Binder<TyCtxt<'tcx>, T>;
pub type EarlyBinder<'tcx, T> = ir::EarlyBinder<TyCtxt<'tcx>, T>;
pub type TypingMode<'tcx> = ir::TypingMode<TyCtxt<'tcx>>;
pub trait Article {
fn article(&self) -> &'static str;

10
compiler/rustc_mir_build/src/build/mod.rs
View File

@ -16,7 +16,7 @@
use rustc_middle::mir::*;
use rustc_middle::query::TyCtxtAt;
use rustc_middle::thir::{self, ExprId, LintLevel, LocalVarId, Param, ParamId, PatKind, Thir};
use rustc_middle::ty::{self, ScalarInt, Ty, TyCtxt, TypeVisitableExt};
use rustc_middle::ty::{self, ScalarInt, Ty, TyCtxt, TypeVisitableExt, TypingMode};
use rustc_middle::{bug, span_bug};
use rustc_span::symbol::sym;
use rustc_span::{Span, Symbol};
@ -500,7 +500,9 @@ fn construct_fn<'tcx>(
);
}
let infcx = tcx.infer_ctxt().build();
// FIXME(#132279): This should be able to reveal opaque
// types defined during HIR typeck.
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let mut builder = Builder::new(
thir,
infcx,
@ -578,7 +580,9 @@ fn construct_const<'a, 'tcx>(
_ => span_bug!(tcx.def_span(def), "can't build MIR for {:?}", def),
};
let infcx = tcx.infer_ctxt().build();
// FIXME(#132279): We likely want to be able to use the hidden types of
// opaques used by this function here.
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let mut builder =
Builder::new(thir, infcx, def, hir_id, span, 0, const_ty, const_ty_span, None);

6
compiler/rustc_mir_build/src/thir/pattern/const_to_pat.rs
View File

@ -7,7 +7,7 @@
use rustc_middle::mir;
use rustc_middle::mir::interpret::ErrorHandled;
use rustc_middle::thir::{FieldPat, Pat, PatKind};
use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt, ValTree};
use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt, TypingMode, ValTree};
use rustc_span::Span;
use rustc_target::abi::{FieldIdx, VariantIdx};
use rustc_trait_selection::traits::ObligationCause;
@ -36,7 +36,9 @@ pub(super) fn const_to_pat(
id: hir::HirId,
span: Span,
) -> Box<Pat<'tcx>> {
let infcx = self.tcx.infer_ctxt().build();
// FIXME(#132279): We likely want to be able to reveal the hidden types
// of opaques defined in this function here.
let infcx = self.tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let mut convert = ConstToPat::new(self, id, span, infcx);
convert.to_pat(c, ty)
}

8
compiler/rustc_mir_transform/src/coroutine.rs
View File

@ -64,7 +64,7 @@
use rustc_middle::mir::visit::{MutVisitor, PlaceContext, Visitor};
use rustc_middle::mir::*;
use rustc_middle::ty::{
self, CoroutineArgs, CoroutineArgsExt, GenericArgsRef, InstanceKind, Ty, TyCtxt,
self, CoroutineArgs, CoroutineArgsExt, GenericArgsRef, InstanceKind, Ty, TyCtxt, TypingMode,
};
use rustc_middle::{bug, span_bug};
use rustc_mir_dataflow::Analysis;
@ -1501,7 +1501,11 @@ fn check_field_tys_sized<'tcx>(
return;
}
let infcx = tcx.infer_ctxt().ignoring_regions().build();
// FIXME(#132279): @lcnr believes that we may want to support coroutines
// whose `Sized`-ness relies on the hidden types of opaques defined by the
// parent function. In this case we'd have to be able to reveal only these
// opaques here.
let infcx = tcx.infer_ctxt().ignoring_regions().build(TypingMode::non_body_analysis());
let param_env = tcx.param_env(def_id);
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);

4
compiler/rustc_mir_transform/src/validate.rs
View File

@ -12,7 +12,7 @@
use rustc_middle::ty::adjustment::PointerCoercion;
use rustc_middle::ty::{
self, CoroutineArgsExt, InstanceKind, ParamEnv, ScalarInt, Ty, TyCtxt, TypeVisitableExt,
Variance,
TypingMode, Variance,
};
use rustc_middle::{bug, span_bug};
use rustc_target::abi::{FIRST_VARIANT, Size};
@ -606,7 +606,7 @@ fn predicate_must_hold_modulo_regions(
return true;
}
let infcx = self.tcx.infer_ctxt().build();
let infcx = self.tcx.infer_ctxt().build(TypingMode::from_param_env(self.param_env));
let ocx = ObligationCtxt::new(&infcx);
ocx.register_obligation(Obligation::new(
self.tcx,

4
compiler/rustc_next_trait_solver/src/delegate.rs
View File

@ -1,7 +1,7 @@
use std::ops::Deref;
use rustc_type_ir::fold::TypeFoldable;
use rustc_type_ir::solve::{Certainty, Goal, NoSolution, SolverMode};
use rustc_type_ir::solve::{Certainty, Goal, NoSolution};
use rustc_type_ir::{self as ty, InferCtxtLike, Interner};
pub trait SolverDelegate: Deref<Target = <Self as SolverDelegate>::Infcx> + Sized {
@ -15,7 +15,6 @@ fn cx(&self) -> Self::Interner {
fn build_with_canonical<V>(
cx: Self::Interner,
solver_mode: SolverMode,
canonical: &ty::CanonicalQueryInput<Self::Interner, V>,
) -> (Self, V, ty::CanonicalVarValues<Self::Interner>)
where
@ -93,7 +92,6 @@ fn inject_new_hidden_type_unchecked(
fn fetch_eligible_assoc_item(
&self,
param_env: <Self::Interner as Interner>::ParamEnv,
goal_trait_ref: ty::TraitRef<Self::Interner>,
trait_assoc_def_id: <Self::Interner as Interner>::DefId,
impl_def_id: <Self::Interner as Interner>::DefId,

14
compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs
View File

@ -8,14 +8,14 @@
use rustc_type_ir::lang_items::TraitSolverLangItem;
use rustc_type_ir::solve::inspect;
use rustc_type_ir::visit::TypeVisitableExt as _;
use rustc_type_ir::{self as ty, Interner, Upcast as _, elaborate};
use rustc_type_ir::{self as ty, Interner, TypingMode, Upcast as _, elaborate};
use tracing::{debug, instrument};
use crate::delegate::SolverDelegate;
use crate::solve::inspect::ProbeKind;
use crate::solve::{
BuiltinImplSource, CandidateSource, CanonicalResponse, Certainty, EvalCtxt, Goal, GoalSource,
MaybeCause, NoSolution, QueryResult, SolverMode,
MaybeCause, NoSolution, QueryResult,
};
/// A candidate is a possible way to prove a goal.
@ -328,11 +328,12 @@ pub(super) fn assemble_and_evaluate_candidates<G: GoalKind<D>>(
let mut candidates = vec![];
if self.solver_mode() == SolverMode::Coherence {
if let TypingMode::Coherence = self.typing_mode(goal.param_env) {
if let Ok(candidate) = self.consider_coherence_unknowable_candidate(goal) {
return vec![candidate];
}
}
self.assemble_impl_candidates(goal, &mut candidates);
self.assemble_builtin_impl_candidates(goal, &mut candidates);
@ -343,8 +344,11 @@ pub(super) fn assemble_and_evaluate_candidates<G: GoalKind<D>>(
self.assemble_param_env_candidates(goal, &mut candidates);
if self.solver_mode() == SolverMode::Normal {
self.discard_impls_shadowed_by_env(goal, &mut candidates);
match self.typing_mode(goal.param_env) {
TypingMode::Coherence => {}
TypingMode::Analysis { .. } | TypingMode::PostAnalysis => {
self.discard_impls_shadowed_by_env(goal, &mut candidates);
}
}
candidates

3
compiler/rustc_next_trait_solver/src/solve/eval_ctxt/canonical.rs
View File

@ -55,6 +55,7 @@ pub(super) fn canonicalize_goal<T: TypeFoldable<I>>(
&self,
goal: Goal<I, T>,
) -> (Vec<I::GenericArg>, CanonicalInput<I, T>) {
let param_env_for_debug_assertion = goal.param_env;
let opaque_types = self.delegate.clone_opaque_types_for_query_response();
let (goal, opaque_types) =
(goal, opaque_types).fold_with(&mut EagerResolver::new(self.delegate));
@ -73,7 +74,7 @@ pub(super) fn canonicalize_goal<T: TypeFoldable<I>>(
);
let query_input = ty::CanonicalQueryInput {
canonical,
defining_opaque_types: self.delegate.defining_opaque_types(),
typing_mode: self.typing_mode(param_env_for_debug_assertion),
};
(orig_values, query_input)
}

23
compiler/rustc_next_trait_solver/src/solve/eval_ctxt/mod.rs
View File

@ -10,7 +10,7 @@
use rustc_type_ir::relate::Relate;
use rustc_type_ir::relate::solver_relating::RelateExt;
use rustc_type_ir::visit::{TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor};
use rustc_type_ir::{self as ty, CanonicalVarValues, InferCtxtLike, Interner};
use rustc_type_ir::{self as ty, CanonicalVarValues, InferCtxtLike, Interner, TypingMode};
use rustc_type_ir_macros::{Lift_Generic, TypeFoldable_Generic, TypeVisitable_Generic};
use tracing::{instrument, trace};
@ -21,7 +21,6 @@
use crate::solve::{
CanonicalInput, Certainty, FIXPOINT_STEP_LIMIT, Goal, GoalEvaluationKind, GoalSource,
HasChanged, NestedNormalizationGoals, NoSolution, PredefinedOpaquesData, QueryResult,
SolverMode,
};
pub(super) mod canonical;
@ -215,8 +214,8 @@ impl<'a, D, I> EvalCtxt<'a, D>
D: SolverDelegate<Interner = I>,
I: Interner,
{
pub(super) fn solver_mode(&self) -> SolverMode {
self.search_graph.solver_mode()
pub(super) fn typing_mode(&self, param_env_for_debug_assertion: I::ParamEnv) -> TypingMode<I> {
self.delegate.typing_mode(param_env_for_debug_assertion)
}
pub(super) fn set_is_normalizes_to_goal(&mut self) {
@ -232,7 +231,7 @@ pub(super) fn enter_root<R>(
generate_proof_tree: GenerateProofTree,
f: impl FnOnce(&mut EvalCtxt<'_, D>) -> R,
) -> (R, Option<inspect::GoalEvaluation<I>>) {
let mut search_graph = SearchGraph::new(delegate.solver_mode(), root_depth);
let mut search_graph = SearchGraph::new(root_depth);
let mut ecx = EvalCtxt {
delegate,
@ -279,7 +278,7 @@ fn enter_canonical<R>(
f: impl FnOnce(&mut EvalCtxt<'_, D>, Goal<I, I::Predicate>) -> R,
) -> R {
let (ref delegate, input, var_values) =
SolverDelegate::build_with_canonical(cx, search_graph.solver_mode(), &canonical_input);
SolverDelegate::build_with_canonical(cx, &canonical_input);
let mut ecx = EvalCtxt {
delegate,
@ -942,21 +941,11 @@ pub(super) fn trait_ref_is_knowable(
pub(super) fn fetch_eligible_assoc_item(
&self,
param_env: I::ParamEnv,
goal_trait_ref: ty::TraitRef<I>,
trait_assoc_def_id: I::DefId,
impl_def_id: I::DefId,
) -> Result<Option<I::DefId>, NoSolution> {
self.delegate.fetch_eligible_assoc_item(
param_env,
goal_trait_ref,
trait_assoc_def_id,
impl_def_id,
)
}
pub(super) fn can_define_opaque_ty(&self, def_id: I::LocalDefId) -> bool {
self.delegate.defining_opaque_types().contains(&def_id)
self.delegate.fetch_eligible_assoc_item(goal_trait_ref, trait_assoc_def_id, impl_def_id)
}
pub(super) fn insert_hidden_type(

17
compiler/rustc_next_trait_solver/src/solve/normalizes_to/mod.rs
View File

@ -6,7 +6,7 @@
use rustc_type_ir::fast_reject::DeepRejectCtxt;
use rustc_type_ir::inherent::*;
use rustc_type_ir::lang_items::TraitSolverLangItem;
use rustc_type_ir::{self as ty, Interner, NormalizesTo, Upcast as _};
use rustc_type_ir::{self as ty, Interner, NormalizesTo, TypingMode, Upcast as _};
use tracing::instrument;
use crate::delegate::SolverDelegate;
@ -15,7 +15,7 @@
use crate::solve::inspect::ProbeKind;
use crate::solve::{
BuiltinImplSource, CandidateSource, Certainty, EvalCtxt, Goal, GoalSource, MaybeCause,
NoSolution, QueryResult, Reveal,
NoSolution, QueryResult,
};
impl<D, I> EvalCtxt<'_, D>
@ -71,21 +71,21 @@ fn add_rigid_constraints(
Ok(())
}
ty::AliasTermKind::OpaqueTy => {
match param_env.reveal() {
// In user-facing mode, paques are only rigid if we may not define it.
Reveal::UserFacing => {
match self.typing_mode(param_env) {
// Opaques are never rigid outside of analysis mode.
TypingMode::Coherence | TypingMode::PostAnalysis => Err(NoSolution),
// During analysis, opaques are only rigid if we may not define it.
TypingMode::Analysis { defining_opaque_types } => {
if rigid_alias
.def_id
.as_local()
.is_some_and(|def_id| self.can_define_opaque_ty(def_id))
.is_some_and(|def_id| defining_opaque_types.contains(&def_id))
{
Err(NoSolution)
} else {
Ok(())
}
}
// Opaques are never rigid in reveal-all mode.
Reveal::All => Err(NoSolution),
}
}
// FIXME(generic_const_exprs): we would need to support generic consts here
@ -252,7 +252,6 @@ fn consider_impl_candidate(
// return ambiguity this would otherwise be incomplete, resulting in
// unsoundness during coherence (#105782).
let Some(target_item_def_id) = ecx.fetch_eligible_assoc_item(
goal.param_env,
goal_trait_ref,
goal.predicate.def_id(),
impl_def_id,

50
compiler/rustc_next_trait_solver/src/solve/normalizes_to/opaque_types.rs
View File

@ -4,12 +4,10 @@
use rustc_index::bit_set::GrowableBitSet;
use rustc_type_ir::inherent::*;
use rustc_type_ir::{self as ty, Interner};
use rustc_type_ir::{self as ty, Interner, TypingMode};
use crate::delegate::SolverDelegate;
use crate::solve::{
Certainty, EvalCtxt, Goal, NoSolution, QueryResult, Reveal, SolverMode, inspect,
};
use crate::solve::{Certainty, EvalCtxt, Goal, NoSolution, QueryResult, inspect};
impl<D, I> EvalCtxt<'_, D>
where
@ -24,17 +22,27 @@ pub(super) fn normalize_opaque_type(
let opaque_ty = goal.predicate.alias;
let expected = goal.predicate.term.as_type().expect("no such thing as an opaque const");
match (goal.param_env.reveal(), self.solver_mode()) {
(Reveal::UserFacing, SolverMode::Normal) => {
let Some(opaque_ty_def_id) = opaque_ty.def_id.as_local() else {
match self.typing_mode(goal.param_env) {
TypingMode::Coherence => {
// An impossible opaque type bound is the only way this goal will fail
// e.g. assigning `impl Copy := NotCopy`
self.add_item_bounds_for_hidden_type(
opaque_ty.def_id,
opaque_ty.args,
goal.param_env,
expected,
);
self.evaluate_added_goals_and_make_canonical_response(Certainty::AMBIGUOUS)
}
TypingMode::Analysis { defining_opaque_types } => {
let Some(def_id) = opaque_ty.def_id.as_local() else {
return Err(NoSolution);
};
// FIXME: at some point we should call queries without defining
// new opaque types but having the existing opaque type definitions.
// This will require moving this below "Prefer opaques registered already".
if !self.can_define_opaque_ty(opaque_ty_def_id) {
if !defining_opaque_types.contains(&def_id) {
return Err(NoSolution);
}
// FIXME: This may have issues when the args contain aliases...
match uses_unique_placeholders_ignoring_regions(self.cx(), opaque_ty.args) {
Err(NotUniqueParam::NotParam(param)) if param.is_non_region_infer() => {
@ -48,8 +56,7 @@ pub(super) fn normalize_opaque_type(
Ok(()) => {}
}
// Prefer opaques registered already.
let opaque_type_key =
ty::OpaqueTypeKey { def_id: opaque_ty_def_id, args: opaque_ty.args };
let opaque_type_key = ty::OpaqueTypeKey { def_id, args: opaque_ty.args };
// FIXME: This also unifies the previous hidden type with the expected.
//
// If that fails, we insert `expected` as a new hidden type instead of
@ -69,7 +76,7 @@ pub(super) fn normalize_opaque_type(
}
ecx.eq(goal.param_env, candidate_ty, expected)?;
ecx.add_item_bounds_for_hidden_type(
candidate_key.def_id.into(),
def_id.into(),
candidate_key.args,
goal.param_env,
candidate_ty,
@ -82,25 +89,14 @@ pub(super) fn normalize_opaque_type(
// FIXME: should we use `inject_hidden_type_unchecked` here?
self.insert_hidden_type(opaque_type_key, goal.param_env, expected)?;
self.add_item_bounds_for_hidden_type(
opaque_ty.def_id,
def_id.into(),
opaque_ty.args,
goal.param_env,
expected,
);
self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
}
(Reveal::UserFacing, SolverMode::Coherence) => {
// An impossible opaque type bound is the only way this goal will fail
// e.g. assigning `impl Copy := NotCopy`
self.add_item_bounds_for_hidden_type(
opaque_ty.def_id,
opaque_ty.args,
goal.param_env,
expected,
);
self.evaluate_added_goals_and_make_canonical_response(Certainty::AMBIGUOUS)
}
(Reveal::All, _) => {
TypingMode::PostAnalysis => {
// FIXME: Add an assertion that opaque type storage is empty.
let actual = cx.type_of(opaque_ty.def_id).instantiate(cx, opaque_ty.args);
self.eq(goal.param_env, expected, actual)?;

46
compiler/rustc_next_trait_solver/src/solve/trait_goals.rs
View File

@ -6,7 +6,7 @@
use rustc_type_ir::inherent::*;
use rustc_type_ir::lang_items::TraitSolverLangItem;
use rustc_type_ir::visit::TypeVisitableExt as _;
use rustc_type_ir::{self as ty, Interner, TraitPredicate, Upcast as _, elaborate};
use rustc_type_ir::{self as ty, Interner, TraitPredicate, TypingMode, Upcast as _, elaborate};
use tracing::{instrument, trace};
use crate::delegate::SolverDelegate;
@ -15,7 +15,7 @@
use crate::solve::inspect::ProbeKind;
use crate::solve::{
BuiltinImplSource, CandidateSource, Certainty, EvalCtxt, Goal, GoalSource, MaybeCause,
NoSolution, QueryResult, Reveal, SolverMode,
NoSolution, QueryResult,
};
impl<D, I> assembly::GoalKind<D> for TraitPredicate<I>
@ -67,9 +67,9 @@ fn consider_impl_candidate(
let maximal_certainty = match (impl_polarity, goal.predicate.polarity) {
// In intercrate mode, this is ambiguous. But outside of intercrate,
// it's not a real impl.
(ty::ImplPolarity::Reservation, _) => match ecx.solver_mode() {
SolverMode::Coherence => Certainty::AMBIGUOUS,
SolverMode::Normal => return Err(NoSolution),
(ty::ImplPolarity::Reservation, _) => match ecx.typing_mode(goal.param_env) {
TypingMode::Coherence => Certainty::AMBIGUOUS,
TypingMode::Analysis { .. } | TypingMode::PostAnalysis => return Err(NoSolution),
},
// Impl matches polarity
@ -167,30 +167,26 @@ fn consider_auto_trait_candidate(
return result;
}
// Don't call `type_of` on a local TAIT that's in the defining scope,
// since that may require calling `typeck` on the same item we're
// We only look into opaque types during analysis for opaque types
// outside of their defining scope. Doing so for opaques in the
// defining scope may require calling `typeck` on the same item we're
// currently type checking, which will result in a fatal cycle that
// ideally we want to avoid, since we can make progress on this goal
// via an alias bound or a locally-inferred hidden type instead.
//
// Also, don't call `type_of` on a TAIT in `Reveal::All` mode, since
// we already normalize the self type in
// `assemble_candidates_after_normalizing_self_ty`, and we'd
// just be registering an identical candidate here.
//
// We always return `Err(NoSolution)` here in `SolverMode::Coherence`
// since we'll always register an ambiguous candidate in
// `assemble_candidates_after_normalizing_self_ty` due to normalizing
// the TAIT.
if let ty::Alias(ty::Opaque, opaque_ty) = goal.predicate.self_ty().kind() {
if matches!(goal.param_env.reveal(), Reveal::All)
|| matches!(ecx.solver_mode(), SolverMode::Coherence)
|| opaque_ty
.def_id
.as_local()
.is_some_and(|def_id| ecx.can_define_opaque_ty(def_id))
{
return Err(NoSolution);
match ecx.typing_mode(goal.param_env) {
TypingMode::Coherence | TypingMode::PostAnalysis => {
unreachable!("rigid opaque outside of analysis: {goal:?}");
}
TypingMode::Analysis { defining_opaque_types } => {
if opaque_ty
.def_id
.as_local()
.is_some_and(|def_id| defining_opaque_types.contains(&def_id))
{
return Err(NoSolution);
}
}
}
}

4
compiler/rustc_passes/src/check_attr.rs
View File

@ -25,7 +25,7 @@
use rustc_middle::query::Providers;
use rustc_middle::traits::ObligationCause;
use rustc_middle::ty::error::{ExpectedFound, TypeError};
use rustc_middle::ty::{self, TyCtxt};
use rustc_middle::ty::{self, TyCtxt, TypingMode};
use rustc_middle::{bug, span_bug};
use rustc_session::lint::builtin::{
CONFLICTING_REPR_HINTS, INVALID_DOC_ATTRIBUTES, INVALID_MACRO_EXPORT_ARGUMENTS,
@ -2267,7 +2267,7 @@ fn check_proc_macro(&self, hir_id: HirId, target: Target, kind: ProcMacroKind) {
let def_id = hir_id.expect_owner().def_id;
let param_env = ty::ParamEnv::empty();
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
let span = tcx.def_span(def_id);

3
compiler/rustc_passes/src/layout_test.rs
View File

@ -2,6 +2,7 @@
use rustc_ast::Attribute;
use rustc_hir::def::DefKind;
use rustc_hir::def_id::LocalDefId;
use rustc_middle::infer::canonical::ir::TypingMode;
use rustc_middle::span_bug;
use rustc_middle::ty::layout::{HasParamEnv, HasTyCtxt, LayoutError, LayoutOfHelpers};
use rustc_middle::ty::{self, ParamEnv, Ty, TyCtxt};
@ -54,7 +55,7 @@ pub fn ensure_wf<'tcx>(
param_env,
pred,
);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
let ocx = traits::ObligationCtxt::new_with_diagnostics(&infcx);
ocx.register_obligation(obligation);
let errors = ocx.select_all_or_error();

24
compiler/rustc_trait_selection/src/solve/delegate.rs
View File

@ -7,13 +7,13 @@
Canonical, CanonicalExt as _, CanonicalQueryInput, CanonicalVarInfo, CanonicalVarValues,
};
use rustc_infer::infer::{InferCtxt, RegionVariableOrigin, TyCtxtInferExt};
use rustc_infer::traits::ObligationCause;
use rustc_infer::traits::solve::Goal;
use rustc_infer::traits::{ObligationCause, Reveal};
use rustc_middle::ty::fold::TypeFoldable;
use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt as _};
use rustc_span::{DUMMY_SP, ErrorGuaranteed, Span};
use rustc_type_ir::solve::{Certainty, NoSolution, SolverMode};
use tracing::trace;
use rustc_type_ir::TypingMode;
use rustc_type_ir::solve::{Certainty, NoSolution};
use crate::traits::specialization_graph;
@ -47,7 +47,6 @@ fn cx(&self) -> TyCtxt<'tcx> {
fn build_with_canonical<V>(
interner: TyCtxt<'tcx>,
solver_mode: SolverMode,
canonical: &CanonicalQueryInput<'tcx, V>,
) -> (Self, V, CanonicalVarValues<'tcx>)
where
@ -56,10 +55,6 @@ fn build_with_canonical<V>(
let (infcx, value, vars) = interner
.infer_ctxt()
.with_next_trait_solver(true)
.intercrate(match solver_mode {
SolverMode::Normal => false,
SolverMode::Coherence => true,
})
.build_with_canonical(DUMMY_SP, canonical);
(SolverDelegate(infcx), value, vars)
}
@ -195,7 +190,6 @@ fn reset_opaque_types(&self) {
fn fetch_eligible_assoc_item(
&self,
param_env: ty::ParamEnv<'tcx>,
goal_trait_ref: ty::TraitRef<'tcx>,
trait_assoc_def_id: DefId,
impl_def_id: DefId,
@ -211,12 +205,12 @@ fn fetch_eligible_assoc_item(
// and the obligation is monomorphic, otherwise passes such as
// transmute checking and polymorphic MIR optimizations could
// get a result which isn't correct for all monomorphizations.
if param_env.reveal() == Reveal::All {
let poly_trait_ref = self.resolve_vars_if_possible(goal_trait_ref);
!poly_trait_ref.still_further_specializable()
} else {
trace!(?node_item.item.def_id, "not eligible due to default");
false
match self.typing_mode_unchecked() {
TypingMode::Coherence | TypingMode::Analysis { .. } => false,
TypingMode::PostAnalysis => {
let poly_trait_ref = self.resolve_vars_if_possible(goal_trait_ref);
!poly_trait_ref.still_further_specializable()
}
}
};

5
compiler/rustc_trait_selection/src/traits/auto_trait.rs
View File

@ -10,6 +10,7 @@
use rustc_middle::mir::interpret::ErrorHandled;
use rustc_middle::ty::{Region, RegionVid};
use tracing::debug;
use ty::TypingMode;
use super::*;
use crate::errors::UnableToConstructConstantValue;
@ -79,7 +80,7 @@ pub fn find_auto_trait_generics<A>(
let trait_ref = ty::TraitRef::new(tcx, trait_did, [ty]);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let mut selcx = SelectionContext::new(&infcx);
for polarity in [ty::PredicatePolarity::Positive, ty::PredicatePolarity::Negative] {
let result = selcx.select(&Obligation::new(
@ -99,7 +100,7 @@ pub fn find_auto_trait_generics<A>(
}
}
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let mut fresh_preds = FxIndexSet::default();
// Due to the way projections are handled by SelectionContext, we need to run

16
compiler/rustc_trait_selection/src/traits/coherence.rs
View File

@ -18,7 +18,7 @@
use rustc_middle::traits::specialization_graph::OverlapMode;
use rustc_middle::ty::fast_reject::DeepRejectCtxt;
use rustc_middle::ty::visit::{TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor};
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_middle::ty::{self, Ty, TyCtxt, TypingMode};
pub use rustc_next_trait_solver::coherence::*;
use rustc_next_trait_solver::solve::SolverDelegateEvalExt;
use rustc_span::symbol::sym;
@ -195,9 +195,8 @@ fn overlap<'tcx>(
let infcx = tcx
.infer_ctxt()
.skip_leak_check(skip_leak_check.is_yes())
.intercrate(true)
.with_next_trait_solver(tcx.next_trait_solver_in_coherence())
.build();
.build(TypingMode::Coherence);
let selcx = &mut SelectionContext::new(&infcx);
if track_ambiguity_causes.is_yes() {
selcx.enable_tracking_intercrate_ambiguity_causes();
@ -419,7 +418,7 @@ fn impl_intersection_has_negative_obligation(
// N.B. We need to unify impl headers *with* intercrate mode, even if proving negative predicates
// do not need intercrate mode enabled.
let ref infcx = tcx.infer_ctxt().intercrate(true).with_next_trait_solver(true).build();
let ref infcx = tcx.infer_ctxt().with_next_trait_solver(true).build(TypingMode::Coherence);
let root_universe = infcx.universe();
assert_eq!(root_universe, ty::UniverseIndex::ROOT);
@ -570,7 +569,9 @@ fn try_prove_negated_where_clause<'tcx>(
// the *existence* of a negative goal, not the non-existence of a positive goal.
// Without this, we over-eagerly register coherence ambiguity candidates when
// impl candidates do exist.
let ref infcx = root_infcx.fork_with_intercrate(false);
// FIXME(#132279): `TypingMode::non_body_analysis` is a bit questionable here as it
// would cause us to reveal opaque types to leak their auto traits.
let ref infcx = root_infcx.fork_with_typing_mode(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new(infcx);
ocx.register_obligation(Obligation::new(
infcx.tcx,
@ -714,7 +715,10 @@ fn visit_goal(&mut self, goal: &InspectGoal<'_, 'tcx>) {
// It is only relevant that a goal is unknowable if it would have otherwise
// failed.
let non_intercrate_infcx = infcx.fork_with_intercrate(false);
// FIXME(#132279): Forking with `TypingMode::non_body_analysis` is a bit questionable
// as it would allow us to reveal opaque types, potentially causing unexpected
// cycles.
let non_intercrate_infcx = infcx.fork_with_typing_mode(TypingMode::non_body_analysis());
if non_intercrate_infcx.predicate_may_hold(&Obligation::new(
infcx.tcx,
ObligationCause::dummy(),

4
compiler/rustc_trait_selection/src/traits/dyn_compatibility.rs
View File

@ -14,7 +14,7 @@
use rustc_middle::ty::{
self, EarlyBinder, ExistentialPredicateStableCmpExt as _, GenericArgs, Ty, TyCtxt,
TypeFoldable, TypeFolder, TypeSuperFoldable, TypeSuperVisitable, TypeVisitable,
TypeVisitableExt, TypeVisitor, Upcast,
TypeVisitableExt, TypeVisitor, TypingMode, Upcast,
};
use rustc_span::Span;
use rustc_span::symbol::Symbol;
@ -718,7 +718,7 @@ fn receiver_is_dispatchable<'tcx>(
Obligation::new(tcx, ObligationCause::dummy(), param_env, predicate)
};
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
// the receiver is dispatchable iff the obligation holds
infcx.predicate_must_hold_modulo_regions(&obligation)
}

5
compiler/rustc_trait_selection/src/traits/effects.rs
View File

@ -1,8 +1,9 @@
use rustc_hir as hir;
use rustc_infer::infer::{BoundRegionConversionTime, DefineOpaqueTypes, InferCtxt};
use rustc_infer::traits::{ImplSource, Obligation, PredicateObligation};
use rustc_middle::span_bug;
use rustc_middle::ty::fast_reject::DeepRejectCtxt;
use rustc_middle::{span_bug, ty};
use rustc_middle::ty::{self, TypingMode};
use rustc_type_ir::solve::NoSolution;
use thin_vec::ThinVec;
@ -19,7 +20,7 @@ pub fn evaluate_host_effect_obligation<'tcx>(
selcx: &mut SelectionContext<'_, 'tcx>,
obligation: &HostEffectObligation<'tcx>,
) -> Result<ThinVec<PredicateObligation<'tcx>>, EvaluationFailure> {
if selcx.infcx.intercrate {
if matches!(selcx.infcx.typing_mode(obligation.param_env), TypingMode::Coherence) {
span_bug!(
obligation.cause.span,
"should not select host obligation in old solver in intercrate mode"

17
compiler/rustc_trait_selection/src/traits/fulfill.rs
View File

@ -13,7 +13,7 @@
use rustc_middle::mir::interpret::ErrorHandled;
use rustc_middle::ty::abstract_const::NotConstEvaluatable;
use rustc_middle::ty::error::{ExpectedFound, TypeError};
use rustc_middle::ty::{self, Binder, Const, GenericArgsRef, TypeVisitableExt};
use rustc_middle::ty::{self, Binder, Const, GenericArgsRef, TypeVisitableExt, TypingMode};
use thin_vec::ThinVec;
use tracing::{debug, debug_span, instrument};
@ -760,7 +760,9 @@ fn process_trait_obligation(
stalled_on: &mut Vec<TyOrConstInferVar>,
) -> ProcessResult<PendingPredicateObligation<'tcx>, FulfillmentErrorCode<'tcx>> {
let infcx = self.selcx.infcx;
if obligation.predicate.is_global() && !self.selcx.is_intercrate() {
if obligation.predicate.is_global()
&& !matches!(infcx.typing_mode(obligation.param_env), TypingMode::Coherence)
{
// no type variables present, can use evaluation for better caching.
// FIXME: consider caching errors too.
if infcx.predicate_must_hold_considering_regions(obligation) {
@ -813,11 +815,13 @@ fn process_projection_obligation(
stalled_on: &mut Vec<TyOrConstInferVar>,
) -> ProcessResult<PendingPredicateObligation<'tcx>, FulfillmentErrorCode<'tcx>> {
let tcx = self.selcx.tcx();
if obligation.predicate.is_global() && !self.selcx.is_intercrate() {
let infcx = self.selcx.infcx;
if obligation.predicate.is_global()
&& !matches!(infcx.typing_mode(obligation.param_env), TypingMode::Coherence)
{
// no type variables present, can use evaluation for better caching.
// FIXME: consider caching errors too.
if self.selcx.infcx.predicate_must_hold_considering_regions(obligation) {
if infcx.predicate_must_hold_considering_regions(obligation) {
if let Some(key) = ProjectionCacheKey::from_poly_projection_obligation(
&mut self.selcx,
&project_obligation,
@ -825,8 +829,7 @@ fn process_projection_obligation(
// If `predicate_must_hold_considering_regions` succeeds, then we've
// evaluated all sub-obligations. We can therefore mark the 'root'
// obligation as complete, and skip evaluating sub-obligations.
self.selcx
.infcx
infcx
.inner
.borrow_mut()
.projection_cache()

6
compiler/rustc_trait_selection/src/traits/misc.rs
View File

@ -8,7 +8,7 @@
use rustc_hir as hir;
use rustc_infer::infer::outlives::env::OutlivesEnvironment;
use rustc_infer::infer::{RegionResolutionError, TyCtxtInferExt};
use rustc_middle::ty::{self, AdtDef, Ty, TyCtxt, TypeVisitableExt};
use rustc_middle::ty::{self, AdtDef, Ty, TyCtxt, TypeVisitableExt, TypingMode};
use super::outlives_bounds::InferCtxtExt;
use crate::regions::InferCtxtRegionExt;
@ -143,7 +143,7 @@ pub fn type_allowed_to_implement_const_param_ty<'tcx>(
let mut infringing_inner_tys = vec![];
for inner_ty in inner_tys {
// We use an ocx per inner ty for better diagnostics
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = traits::ObligationCtxt::new_with_diagnostics(&infcx);
ocx.register_bound(
@ -200,7 +200,7 @@ pub fn all_fields_implement_trait<'tcx>(
for variant in adt.variants() {
for field in &variant.fields {
// Do this per-field to get better error messages.
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let ocx = traits::ObligationCtxt::new_with_diagnostics(&infcx);
let unnormalized_ty = field.ty(tcx, args);

18
compiler/rustc_trait_selection/src/traits/mod.rs
View File

@ -34,7 +34,8 @@
use rustc_middle::ty::fold::TypeFoldable;
use rustc_middle::ty::visit::{TypeVisitable, TypeVisitableExt};
use rustc_middle::ty::{
self, GenericArgs, GenericArgsRef, Ty, TyCtxt, TypeFolder, TypeSuperVisitable, Upcast,
self, GenericArgs, GenericArgsRef, Ty, TyCtxt, TypeFolder, TypeSuperVisitable, TypingMode,
Upcast,
};
use rustc_span::Span;
use rustc_span::def_id::DefId;
@ -274,7 +275,7 @@ fn do_normalize_predicates<'tcx>(
// by wfcheck anyway, so I'm not sure we have to check
// them here too, and we will remove this function when
// we move over to lazy normalization *anyway*.
let infcx = tcx.infer_ctxt().ignoring_regions().build();
let infcx = tcx.infer_ctxt().ignoring_regions().build(TypingMode::non_body_analysis());
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
let predicates = ocx.normalize(&cause, elaborated_env, predicates);
@ -475,11 +476,11 @@ fn fold_const(&mut self, c: ty::Const<'tcx>) -> ty::Const<'tcx> {
/// Normalizes the predicates and checks whether they hold in an empty environment. If this
/// returns true, then either normalize encountered an error or one of the predicates did not
/// hold. Used when creating vtables to check for unsatisfiable methods.
/// hold. Used when creating vtables to check for unsatisfiable methods. This should not be
/// used during analysis.
pub fn impossible_predicates<'tcx>(tcx: TyCtxt<'tcx>, predicates: Vec<ty::Clause<'tcx>>) -> bool {
debug!("impossible_predicates(predicates={:?})", predicates);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::PostAnalysis);
let param_env = ty::ParamEnv::reveal_all();
let ocx = ObligationCtxt::new(&infcx);
let predicates = ocx.normalize(&ObligationCause::dummy(), param_env, predicates);
@ -568,8 +569,11 @@ fn visit_const(&mut self, ct: ty::Const<'tcx>) -> Self::Result {
// since that method *may* have some substitutions where the predicates hold.
//
// This replicates the logic we use in coherence.
let infcx =
tcx.infer_ctxt().ignoring_regions().with_next_trait_solver(true).intercrate(true).build();
let infcx = tcx
.infer_ctxt()
.ignoring_regions()
.with_next_trait_solver(true)
.build(TypingMode::Coherence);
let param_env = ty::ParamEnv::empty();
let fresh_args = infcx.fresh_args_for_item(tcx.def_span(impl_def_id), impl_def_id);

36
compiler/rustc_trait_selection/src/traits/project.rs
View File

@ -334,11 +334,6 @@ pub(super) fn opt_normalize_projection_term<'a, 'b, 'tcx>(
) -> Result<Option<Term<'tcx>>, InProgress> {
let infcx = selcx.infcx;
debug_assert!(!selcx.infcx.next_trait_solver());
// Don't use the projection cache in intercrate mode -
// the `infcx` may be re-used between intercrate in non-intercrate
// mode, which could lead to using incorrect cache results.
let use_cache = !selcx.is_intercrate();
let projection_term = infcx.resolve_vars_if_possible(projection_term);
let cache_key = ProjectionCacheKey::new(projection_term, param_env);
@ -349,13 +344,8 @@ pub(super) fn opt_normalize_projection_term<'a, 'b, 'tcx>(
// would not benefit from caching when proving `T: Trait<U=Foo>`
// bounds. It might be the case that we want two distinct caches,
// or else another kind of cache entry.
let cache_result = if use_cache {
infcx.inner.borrow_mut().projection_cache().try_start(cache_key)
} else {
Ok(())
};
match cache_result {
let cache_entry = infcx.inner.borrow_mut().projection_cache().try_start(cache_key);
match cache_entry {
Ok(()) => debug!("no cache"),
Err(ProjectionCacheEntry::Ambiguous) => {
// If we found ambiguity the last time, that means we will continue
@ -378,10 +368,7 @@ pub(super) fn opt_normalize_projection_term<'a, 'b, 'tcx>(
// Cache that normalizing this projection resulted in a cycle. This
// should ensure that, unless this happens within a snapshot that's
// rolled back, fulfillment or evaluation will notice the cycle.
if use_cache {
infcx.inner.borrow_mut().projection_cache().recur(cache_key);
}
infcx.inner.borrow_mut().projection_cache().recur(cache_key);
return Err(InProgress);
}
Err(ProjectionCacheEntry::Recur) => {
@ -445,26 +432,20 @@ pub(super) fn opt_normalize_projection_term<'a, 'b, 'tcx>(
let mut deduped = SsoHashSet::with_capacity(result.obligations.len());
result.obligations.retain(|obligation| deduped.insert(obligation.clone()));
if use_cache {
infcx.inner.borrow_mut().projection_cache().insert_term(cache_key, result.clone());
}
infcx.inner.borrow_mut().projection_cache().insert_term(cache_key, result.clone());
obligations.extend(result.obligations);
Ok(Some(result.value))
}
Ok(Projected::NoProgress(projected_ty)) => {
let result =
Normalized { value: projected_ty, obligations: PredicateObligations::new() };
if use_cache {
infcx.inner.borrow_mut().projection_cache().insert_term(cache_key, result.clone());
}
infcx.inner.borrow_mut().projection_cache().insert_term(cache_key, result.clone());
// No need to extend `obligations`.
Ok(Some(result.value))
}
Err(ProjectionError::TooManyCandidates) => {
debug!("opt_normalize_projection_type: too many candidates");
if use_cache {
infcx.inner.borrow_mut().projection_cache().ambiguous(cache_key);
}
infcx.inner.borrow_mut().projection_cache().ambiguous(cache_key);
Ok(None)
}
Err(ProjectionError::TraitSelectionError(_)) => {
@ -473,10 +454,7 @@ pub(super) fn opt_normalize_projection_term<'a, 'b, 'tcx>(
// just return `ty::err` but add the obligation `T :
// Trait`, which when processed will cause the error to be
// reported later
if use_cache {
infcx.inner.borrow_mut().projection_cache().error(cache_key);
}
infcx.inner.borrow_mut().projection_cache().error(cache_key);
let result = normalize_to_error(selcx, param_env, projection_term, cause, depth);
obligations.extend(result.obligations);
Ok(Some(result.value))

1
compiler/rustc_trait_selection/src/traits/query/evaluate_obligation.rs
View File

@ -87,7 +87,6 @@ fn evaluate_obligation(
Ok(result)
})
} else {
assert!(!self.intercrate);
let c_pred =
self.canonicalize_query(param_env.and(obligation.predicate), &mut _orig_values);
self.tcx.at(obligation.cause.span).evaluate_obligation(c_pred)

11
compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs
View File

@ -16,7 +16,7 @@
Obligation, ObligationCause, PolyTraitObligation, PredicateObligations, SelectionError,
};
use rustc_middle::ty::fast_reject::DeepRejectCtxt;
use rustc_middle::ty::{self, ToPolyTraitRef, Ty, TypeVisitableExt};
use rustc_middle::ty::{self, ToPolyTraitRef, Ty, TypeVisitableExt, TypingMode};
use rustc_middle::{bug, span_bug};
use tracing::{debug, instrument, trace};
@ -790,7 +790,9 @@ fn assemble_candidates_from_auto_impls(
//
// Note that this is only sound as projection candidates of opaque types
// are always applicable for auto traits.
} else if self.infcx.intercrate {
} else if let TypingMode::Coherence =
self.infcx.typing_mode(obligation.param_env)
{
// We do not emit auto trait candidates for opaque types in coherence.
// Doing so can result in weird dependency cycles.
candidates.ambiguous = true;
@ -930,7 +932,10 @@ fn need_migrate_deref_output_trait_object(
) -> Option<ty::PolyExistentialTraitRef<'tcx>> {
// Don't drop any candidates in intercrate mode, as it's incomplete.
// (Not that it matters, since `Unsize` is not a stable trait.)
if self.infcx.intercrate {
//
// FIXME(@lcnr): This should probably only trigger during analysis,
// disabling candidates during codegen is also questionable.
if let TypingMode::Coherence = self.infcx.typing_mode(param_env) {
return None;
}

93
compiler/rustc_trait_selection/src/traits/select/mod.rs
View File

@ -2,6 +2,7 @@
//!
//! [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/traits/resolution.html#selection
use std::assert_matches::assert_matches;
use std::cell::{Cell, RefCell};
use std::fmt::{self, Display};
use std::ops::ControlFlow;
@ -28,7 +29,7 @@
use rustc_middle::ty::print::{PrintTraitRefExt as _, with_no_trimmed_paths};
use rustc_middle::ty::{
self, GenericArgsRef, PolyProjectionPredicate, Ty, TyCtxt, TypeFoldable, TypeVisitableExt,
Upcast,
TypingMode, Upcast,
};
use rustc_span::Symbol;
use rustc_span::symbol::sym;
@ -222,7 +223,7 @@ pub fn with_query_mode(
/// Enables tracking of intercrate ambiguity causes. See
/// the documentation of [`Self::intercrate_ambiguity_causes`] for more.
pub fn enable_tracking_intercrate_ambiguity_causes(&mut self) {
assert!(self.is_intercrate());
assert_matches!(self.infcx.typing_mode_unchecked(), TypingMode::Coherence);
assert!(self.intercrate_ambiguity_causes.is_none());
self.intercrate_ambiguity_causes = Some(FxIndexSet::default());
debug!("selcx: enable_tracking_intercrate_ambiguity_causes");
@ -234,7 +235,7 @@ pub fn enable_tracking_intercrate_ambiguity_causes(&mut self) {
pub fn take_intercrate_ambiguity_causes(
&mut self,
) -> FxIndexSet<IntercrateAmbiguityCause<'tcx>> {
assert!(self.is_intercrate());
assert_matches!(self.infcx.typing_mode_unchecked(), TypingMode::Coherence);
self.intercrate_ambiguity_causes.take().unwrap_or_default()
}
@ -242,10 +243,6 @@ pub fn tcx(&self) -> TyCtxt<'tcx> {
self.infcx.tcx
}
pub fn is_intercrate(&self) -> bool {
self.infcx.intercrate
}
///////////////////////////////////////////////////////////////////////////
// Selection
//
@ -1029,7 +1026,7 @@ fn evaluate_trait_predicate_recursively<'o>(
previous_stack: TraitObligationStackList<'o, 'tcx>,
mut obligation: PolyTraitObligation<'tcx>,
) -> Result<EvaluationResult, OverflowError> {
if !self.is_intercrate()
if !matches!(self.infcx.typing_mode(obligation.param_env), TypingMode::Coherence)
&& obligation.is_global()
&& obligation.param_env.caller_bounds().iter().all(|bound| bound.has_param())
{
@ -1312,14 +1309,6 @@ fn check_evaluation_cache(
param_env: ty::ParamEnv<'tcx>,
trait_pred: ty::PolyTraitPredicate<'tcx>,
) -> Option<EvaluationResult> {
// Neither the global nor local cache is aware of intercrate
// mode, so don't do any caching. In particular, we might
// re-use the same `InferCtxt` with both an intercrate
// and non-intercrate `SelectionContext`
if self.is_intercrate() {
return None;
}
let tcx = self.tcx();
if self.can_use_global_caches(param_env) {
if let Some(res) = tcx.evaluation_cache.get(&(param_env, trait_pred), tcx) {
@ -1342,14 +1331,6 @@ fn insert_evaluation_cache(
return;
}
// Neither the global nor local cache is aware of intercrate
// mode, so don't do any caching. In particular, we might
// re-use the same `InferCtxt` with both an intercrate
// and non-intercrate `SelectionContext`
if self.is_intercrate() {
return;
}
if self.can_use_global_caches(param_env) && !trait_pred.has_infer() {
debug!(?trait_pred, ?result, "insert_evaluation_cache global");
// This may overwrite the cache with the same value
@ -1476,13 +1457,14 @@ fn filter_reservation_impls(
}
fn is_knowable<'o>(&mut self, stack: &TraitObligationStack<'o, 'tcx>) -> Result<(), Conflict> {
debug!("is_knowable(intercrate={:?})", self.is_intercrate());
if !self.is_intercrate() {
return Ok(());
let obligation = &stack.obligation;
match self.infcx.typing_mode(obligation.param_env) {
TypingMode::Coherence => {}
TypingMode::Analysis { .. } | TypingMode::PostAnalysis => return Ok(()),
}
let obligation = &stack.obligation;
debug!("is_knowable()");
let predicate = self.infcx.resolve_vars_if_possible(obligation.predicate);
// Okay to skip binder because of the nature of the
@ -1502,25 +1484,24 @@ fn can_use_global_caches(&self, param_env: ty::ParamEnv<'tcx>) -> bool {
return false;
}
// Avoid using the global cache during coherence and just rely
// on the local cache. This effectively disables caching
// during coherence. It is really just a simplification to
// avoid us having to fear that coherence results "pollute"
// the master cache. Since coherence executes pretty quickly,
// it's not worth going to more trouble to increase the
// hit-rate, I don't think.
if self.is_intercrate() {
return false;
match self.infcx.typing_mode(param_env) {
// Avoid using the global cache during coherence and just rely
// on the local cache. It is really just a simplification to
// avoid us having to fear that coherence results "pollute"
// the master cache. Since coherence executes pretty quickly,
// it's not worth going to more trouble to increase the
// hit-rate, I don't think.
TypingMode::Coherence => false,
// Avoid using the global cache when we're defining opaque types
// as their hidden type may impact the result of candidate selection.
TypingMode::Analysis { defining_opaque_types } => defining_opaque_types.is_empty(),
// The global cache is only used if there are no opaque types in
// the defining scope or we're outside of analysis.
//
// FIXME(#132279): This is still incorrect as we treat opaque types
// and default associated items differently between these two modes.
TypingMode::PostAnalysis => true,
}
// Avoid using the global cache when we're defining opaque types
// as their hidden type may impact the result of candidate selection.
if !self.infcx.defining_opaque_types().is_empty() {
return false;
}
// Otherwise, we can use the global cache.
true
}
fn check_candidate_cache(
@ -1528,13 +1509,6 @@ fn check_candidate_cache(
param_env: ty::ParamEnv<'tcx>,
cache_fresh_trait_pred: ty::PolyTraitPredicate<'tcx>,
) -> Option<SelectionResult<'tcx, SelectionCandidate<'tcx>>> {
// Neither the global nor local cache is aware of intercrate
// mode, so don't do any caching. In particular, we might
// re-use the same `InferCtxt` with both an intercrate
// and non-intercrate `SelectionContext`
if self.is_intercrate() {
return None;
}
let tcx = self.tcx();
let pred = cache_fresh_trait_pred.skip_binder();
@ -1566,13 +1540,6 @@ fn can_cache_candidate(
&self,
result: &SelectionResult<'tcx, SelectionCandidate<'tcx>>,
) -> bool {
// Neither the global nor local cache is aware of intercrate
// mode, so don't do any caching. In particular, we might
// re-use the same `InferCtxt` with both an intercrate
// and non-intercrate `SelectionContext`
if self.is_intercrate() {
return false;
}
match result {
Ok(Some(SelectionCandidate::ParamCandidate(trait_ref))) => !trait_ref.has_infer(),
_ => true,
@ -2541,7 +2508,9 @@ fn match_impl(
})?;
nested_obligations.extend(obligations);
if !self.is_intercrate() && impl_trait_header.polarity == ty::ImplPolarity::Reservation {
if impl_trait_header.polarity == ty::ImplPolarity::Reservation
&& !matches!(self.infcx.typing_mode(obligation.param_env), TypingMode::Coherence)
{
debug!("reservation impls only apply in intercrate mode");
return Err(());
}

6
compiler/rustc_trait_selection/src/traits/specialize/mod.rs
View File

@ -19,7 +19,9 @@
use rustc_middle::bug;
use rustc_middle::query::LocalCrate;
use rustc_middle::ty::print::PrintTraitRefExt as _;
use rustc_middle::ty::{self, GenericArgsRef, ImplSubject, Ty, TyCtxt, TypeVisitableExt};
use rustc_middle::ty::{
self, GenericArgsRef, ImplSubject, Ty, TyCtxt, TypeVisitableExt, TypingMode,
};
use rustc_session::lint::builtin::{COHERENCE_LEAK_CHECK, ORDER_DEPENDENT_TRAIT_OBJECTS};
use rustc_span::{DUMMY_SP, ErrorGuaranteed, Span, sym};
use specialization_graph::GraphExt;
@ -184,7 +186,7 @@ pub(super) fn specializes(tcx: TyCtxt<'_>, (impl1_def_id, impl2_def_id): (DefId,
let penv = tcx.param_env(impl1_def_id);
// Create an infcx, taking the predicates of impl1 as assumptions:
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
// Attempt to prove that impl2 applies, given all of the above.
fulfill_implication(

5
compiler/rustc_trait_selection/src/traits/vtable.rs
View File

@ -9,7 +9,8 @@
use rustc_middle::bug;
use rustc_middle::query::Providers;
use rustc_middle::ty::{
self, GenericArgs, GenericParamDefKind, Ty, TyCtxt, TypeVisitableExt, Upcast, VtblEntry,
self, GenericArgs, GenericParamDefKind, Ty, TyCtxt, TypeVisitableExt, TypingMode, Upcast,
VtblEntry,
};
use rustc_span::{DUMMY_SP, Span, sym};
use smallvec::{SmallVec, smallvec};
@ -439,7 +440,7 @@ fn trait_refs_are_compatible<'tcx>(
return false;
}
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::PostAnalysis);
let param_env = ty::ParamEnv::reveal_all();
let ocx = ObligationCtxt::new(&infcx);
let hr_source_principal =

4
compiler/rustc_traits/src/codegen.rs
View File

@ -6,7 +6,7 @@
use rustc_infer::infer::TyCtxtInferExt;
use rustc_middle::bug;
use rustc_middle::traits::CodegenObligationError;
use rustc_middle::ty::{self, TyCtxt, TypeVisitableExt};
use rustc_middle::ty::{self, TyCtxt, TypeVisitableExt, TypingMode};
use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
use rustc_trait_selection::traits::{
ImplSource, Obligation, ObligationCause, ObligationCtxt, ScrubbedTraitError, SelectionContext,
@ -30,7 +30,7 @@ pub(crate) fn codegen_select_candidate<'tcx>(
// Do the initial selection for the obligation. This yields the
// shallow result we are looking for -- that is, what specific impl.
let infcx = tcx.infer_ctxt().ignoring_regions().build();
let infcx = tcx.infer_ctxt().ignoring_regions().build(TypingMode::from_param_env(param_env));
let mut selcx = SelectionContext::new(&infcx);
let obligation_cause = ObligationCause::dummy();

4
compiler/rustc_traits/src/normalize_erasing_regions.rs
View File

@ -1,7 +1,7 @@
use rustc_infer::infer::TyCtxtInferExt;
use rustc_middle::query::Providers;
use rustc_middle::traits::query::NoSolution;
use rustc_middle::ty::{self, ParamEnvAnd, TyCtxt, TypeFoldable, TypeVisitableExt};
use rustc_middle::ty::{self, ParamEnvAnd, TyCtxt, TypeFoldable, TypeVisitableExt, TypingMode};
use rustc_trait_selection::traits::query::normalize::QueryNormalizeExt;
use rustc_trait_selection::traits::{Normalized, ObligationCause};
use tracing::debug;
@ -22,7 +22,7 @@ fn try_normalize_after_erasing_regions<'tcx, T: TypeFoldable<TyCtxt<'tcx>> + Par
goal: ParamEnvAnd<'tcx, T>,
) -> Result<T, NoSolution> {
let ParamEnvAnd { param_env, value } = goal;
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
let cause = ObligationCause::dummy();
match infcx.at(&cause, param_env).query_normalize(value) {
Ok(Normalized { value: normalized_value, obligations: normalized_obligations }) => {

4
compiler/rustc_ty_utils/src/common_traits.rs
View File

@ -3,7 +3,7 @@
use rustc_hir::lang_items::LangItem;
use rustc_infer::infer::TyCtxtInferExt;
use rustc_middle::query::Providers;
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_middle::ty::{self, Ty, TyCtxt, TypingMode};
use rustc_trait_selection::traits;
fn is_copy_raw<'tcx>(tcx: TyCtxt<'tcx>, query: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
@ -29,7 +29,7 @@ fn is_item_raw<'tcx>(
) -> bool {
let (param_env, ty) = query.into_parts();
let trait_def_id = tcx.require_lang_item(item, None);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
traits::type_known_to_meet_bound_modulo_regions(&infcx, param_env, ty, trait_def_id)
}

4
compiler/rustc_ty_utils/src/instance.rs
View File

@ -6,7 +6,7 @@
use rustc_middle::query::Providers;
use rustc_middle::traits::{BuiltinImplSource, CodegenObligationError};
use rustc_middle::ty::util::AsyncDropGlueMorphology;
use rustc_middle::ty::{self, GenericArgsRef, Instance, TyCtxt, TypeVisitableExt};
use rustc_middle::ty::{self, GenericArgsRef, Instance, TyCtxt, TypeVisitableExt, TypingMode};
use rustc_span::sym;
use rustc_trait_selection::traits;
use rustc_type_ir::ClosureKind;
@ -130,7 +130,7 @@ fn resolve_associated_item<'tcx>(
.unwrap_or_else(|| {
bug!("{:?} not found in {:?}", trait_item_id, impl_data.impl_def_id);
});
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::PostAnalysis);
let param_env = param_env.with_reveal_all_normalized(tcx);
let args = rcvr_args.rebase_onto(tcx, trait_def_id, impl_data.args);
let args = translate_args(

4
compiler/rustc_ty_utils/src/structural_match.rs
View File

@ -1,7 +1,7 @@
use rustc_hir::lang_items::LangItem;
use rustc_infer::infer::TyCtxtInferExt;
use rustc_middle::query::Providers;
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_middle::ty::{self, Ty, TyCtxt, TypingMode};
use rustc_trait_selection::traits::{ObligationCause, ObligationCtxt};
/// This method returns true if and only if `adt_ty` itself has been marked as
@ -11,7 +11,7 @@
/// Note that this does *not* recursively check if the substructure of `adt_ty`
/// implements the trait.
fn has_structural_eq_impl<'tcx>(tcx: TyCtxt<'tcx>, adt_ty: Ty<'tcx>) -> bool {
let infcx = &tcx.infer_ctxt().build();
let infcx = &tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let cause = ObligationCause::dummy();
let ocx = ObligationCtxt::new(infcx);

4
compiler/rustc_type_ir/src/canonical.rs
View File

@ -8,7 +8,7 @@
use rustc_type_ir_macros::{Lift_Generic, TypeFoldable_Generic, TypeVisitable_Generic};
use crate::inherent::*;
use crate::{self as ty, Interner, UniverseIndex};
use crate::{self as ty, Interner, TypingMode, UniverseIndex};
#[derive_where(Clone; I: Interner, V: Clone)]
#[derive_where(Hash; I: Interner, V: Hash)]
@ -19,7 +19,7 @@
#[cfg_attr(feature = "nightly", derive(TyEncodable, TyDecodable, HashStable_NoContext))]
pub struct CanonicalQueryInput<I: Interner, V> {
pub canonical: Canonical<I, V>,
pub defining_opaque_types: I::DefiningOpaqueTypes,
pub typing_mode: TypingMode<I>,
}
/// A "canonicalized" type `V` is one where all free inference

68
compiler/rustc_type_ir/src/infer_ctxt.rs
View File

@ -1,9 +1,68 @@
use derive_where::derive_where;
#[cfg(feature = "nightly")]
use rustc_macros::{HashStable_NoContext, TyDecodable, TyEncodable};
use crate::fold::TypeFoldable;
use crate::inherent::*;
use crate::relate::RelateResult;
use crate::relate::combine::PredicateEmittingRelation;
use crate::solve::SolverMode;
use crate::solve::Reveal;
use crate::{self as ty, Interner};
/// The current typing mode of an inference context. We unfortunately have some
/// slightly different typing rules depending on the current context. See the
/// doc comment for each variant for how and why they are used.
#[derive_where(Clone, Copy, Hash, PartialEq, Eq, Debug; I: Interner)]
#[cfg_attr(feature = "nightly", derive(TyEncodable, TyDecodable, HashStable_NoContext))]
pub enum TypingMode<I: Interner> {
/// When checking whether impls overlap, we check whether any obligations
/// are guaranteed to never hold when unifying the impls. This requires us
/// to be complete: we must never fail to prove something which may actually
/// hold.
///
/// In this typing mode we bail with ambiguity in case its not knowable
/// whether a trait goal may hold, e.g. because the trait may get implemented
/// in a downstream or sibling crate.
///
/// We also have to be careful when generalizing aliases inside of higher-ranked
/// types to not unnecessarily constrain any inference variables.
Coherence,
/// Analysis includes type inference, checking that items are well-formed, and
/// pretty much everything else which may emit proper type errors to the user.
///
/// We only normalize opaque types which may get defined by the current body,
/// which are stored in `defining_opaque_types`.
Analysis { defining_opaque_types: I::DefiningOpaqueTypes },
/// After analysis, mostly during codegen and MIR optimizations, we're able to
/// reveal all opaque types.
PostAnalysis,
}
impl<I: Interner> TypingMode<I> {
/// Analysis outside of a body does not define any opaque types.
pub fn non_body_analysis() -> TypingMode<I> {
TypingMode::Analysis { defining_opaque_types: Default::default() }
}
/// While typechecking a body, we need to be able to define the opaque
/// types defined by that body.
pub fn analysis_in_body(cx: I, body_def_id: I::LocalDefId) -> TypingMode<I> {
TypingMode::Analysis { defining_opaque_types: cx.opaque_types_defined_by(body_def_id) }
}
/// FIXME(#132279): Using this function is questionable as the `param_env`
/// does not track `defining_opaque_types` and whether we're in coherence mode.
/// Many uses of this function should also use a not-yet implemented typing mode
/// which reveals already defined opaque types in the future. This function will
/// get completely removed at some point.
pub fn from_param_env(param_env: I::ParamEnv) -> TypingMode<I> {
match param_env.reveal() {
Reveal::UserFacing => TypingMode::non_body_analysis(),
Reveal::All => TypingMode::PostAnalysis,
}
}
}
pub trait InferCtxtLike: Sized {
type Interner: Interner;
fn cx(&self) -> Self::Interner;
@ -16,7 +75,10 @@ fn next_trait_solver(&self) -> bool {
true
}
fn solver_mode(&self) -> SolverMode;
fn typing_mode(
&self,
param_env_for_debug_assertion: <Self::Interner as Interner>::ParamEnv,
) -> TypingMode<Self::Interner>;
fn universe(&self) -> ty::UniverseIndex;
fn create_next_universe(&self) -> ty::UniverseIndex;
@ -43,8 +105,6 @@ fn opportunistic_resolve_lt_var(
vid: ty::RegionVid,
) -> <Self::Interner as Interner>::Region;
fn defining_opaque_types(&self) -> <Self::Interner as Interner>::DefiningOpaqueTypes;
fn next_ty_infer(&self) -> <Self::Interner as Interner>::Ty;
fn next_const_infer(&self) -> <Self::Interner as Interner>::Const;
fn fresh_args_for_item(

23
compiler/rustc_type_ir/src/interner.rs
View File

@ -11,9 +11,7 @@
use crate::ir_print::IrPrint;
use crate::lang_items::TraitSolverLangItem;
use crate::relate::Relate;
use crate::solve::{
CanonicalInput, ExternalConstraintsData, PredefinedOpaquesData, QueryResult, SolverMode,
};
use crate::solve::{CanonicalInput, ExternalConstraintsData, PredefinedOpaquesData, QueryResult};
use crate::visit::{Flags, TypeSuperVisitable, TypeVisitable};
use crate::{self as ty, search_graph};
@ -130,11 +128,7 @@ fn mk_tracked<T: Debug + Clone>(
type Clause: Clause<Self>;
type Clauses: Copy + Debug + Hash + Eq + TypeSuperVisitable<Self> + Flags;
fn with_global_cache<R>(
self,
mode: SolverMode,
f: impl FnOnce(&mut search_graph::GlobalCache<Self>) -> R,
) -> R;
fn with_global_cache<R>(self, f: impl FnOnce(&mut search_graph::GlobalCache<Self>) -> R) -> R;
fn evaluation_is_concurrent(&self) -> bool;
@ -298,6 +292,11 @@ fn anonymize_bound_vars<T: TypeFoldable<Self>>(
self,
binder: ty::Binder<Self, T>,
) -> ty::Binder<Self, T>;
fn opaque_types_defined_by(
self,
defining_anchor: Self::LocalDefId,
) -> Self::DefiningOpaqueTypes;
}
/// Imagine you have a function `F: FnOnce(&[T]) -> R`, plus an iterator `iter`
@ -414,12 +413,8 @@ fn get_tracked<T: Debug + Clone>(self, tracked: &I::Tracked<T>) -> T {
fn with_cached_task<T>(self, task: impl FnOnce() -> T) -> (T, I::DepNodeIndex) {
I::with_cached_task(self, task)
}
fn with_global_cache<R>(
self,
mode: SolverMode,
f: impl FnOnce(&mut search_graph::GlobalCache<Self>) -> R,
) -> R {
I::with_global_cache(self, mode, f)
fn with_global_cache<R>(self, f: impl FnOnce(&mut search_graph::GlobalCache<Self>) -> R) -> R {
I::with_global_cache(self, f)
}
fn evaluation_is_concurrent(&self) -> bool {
self.evaluation_is_concurrent()

18
compiler/rustc_type_ir/src/relate/combine.rs
View File

@ -6,9 +6,9 @@
};
use crate::error::TypeError;
use crate::inherent::*;
use crate::solve::{Goal, SolverMode};
use crate::solve::Goal;
use crate::visit::TypeVisitableExt as _;
use crate::{self as ty, InferCtxtLike, Interner, Upcast};
use crate::{self as ty, InferCtxtLike, Interner, TypingMode, Upcast};
pub trait PredicateEmittingRelation<Infcx, I = <Infcx as InferCtxtLike>::Interner>:
TypeRelation<I>
@ -128,19 +128,19 @@ pub fn super_combine_tys<Infcx, I, R>(
}
(ty::Alias(ty::Opaque, _), _) | (_, ty::Alias(ty::Opaque, _)) => {
match infcx.solver_mode() {
SolverMode::Normal => {
assert!(!infcx.next_trait_solver());
structurally_relate_tys(relation, a, b)
}
assert!(!infcx.next_trait_solver());
match infcx.typing_mode(relation.param_env()) {
// During coherence, opaque types should be treated as *possibly*
// equal to any other type (except for possibly itinfcx). This is an
// equal to any other type. This is an
// extremely heavy hammer, but can be relaxed in a forwards-compatible
// way later.
SolverMode::Coherence => {
TypingMode::Coherence => {
relation.register_predicates([ty::Binder::dummy(ty::PredicateKind::Ambiguous)]);
Ok(a)
}
TypingMode::Analysis { .. } | TypingMode::PostAnalysis => {
structurally_relate_tys(relation, a, b)
}
}
}

21
compiler/rustc_type_ir/src/search_graph/mod.rs
View File

@ -22,7 +22,6 @@
use tracing::debug;
use crate::data_structures::HashMap;
use crate::solve::SolverMode;
mod global_cache;
use global_cache::CacheData;
@ -48,11 +47,7 @@ fn mk_tracked<T: Debug + Clone>(
fn get_tracked<T: Debug + Clone>(self, tracked: &Self::Tracked<T>) -> T;
fn with_cached_task<T>(self, task: impl FnOnce() -> T) -> (T, Self::DepNodeIndex);
fn with_global_cache<R>(
self,
mode: SolverMode,
f: impl FnOnce(&mut GlobalCache<Self>) -> R,
) -> R;
fn with_global_cache<R>(self, f: impl FnOnce(&mut GlobalCache<Self>) -> R) -> R;
fn evaluation_is_concurrent(&self) -> bool;
}
@ -358,7 +353,6 @@ struct ProvisionalCacheEntry<X: Cx> {
}
pub struct SearchGraph<D: Delegate<Cx = X>, X: Cx = <D as Delegate>::Cx> {
mode: SolverMode,
root_depth: AvailableDepth,
/// The stack of goals currently being computed.
///
@ -374,9 +368,8 @@ pub struct SearchGraph<D: Delegate<Cx = X>, X: Cx = <D as Delegate>::Cx> {
}
impl<D: Delegate<Cx = X>, X: Cx> SearchGraph<D> {
pub fn new(mode: SolverMode, root_depth: usize) -> SearchGraph<D> {
pub fn new(root_depth: usize) -> SearchGraph<D> {
Self {
mode,
root_depth: AvailableDepth(root_depth),
stack: Default::default(),
provisional_cache: Default::default(),
@ -384,10 +377,6 @@ pub fn new(mode: SolverMode, root_depth: usize) -> SearchGraph<D> {
}
}
pub fn solver_mode(&self) -> SolverMode {
self.mode
}
/// Lazily update the stack entry for the parent goal.
/// This behavior is shared between actually evaluating goals
/// and using existing global cache entries to make sure they
@ -829,7 +818,7 @@ fn lookup_global_cache_untracked(
input: X::Input,
available_depth: AvailableDepth,
) -> Option<X::Result> {
cx.with_global_cache(self.mode, |cache| {
cx.with_global_cache(|cache| {
cache
.get(cx, input, available_depth, |nested_goals| {
Self::candidate_is_applicable(
@ -852,7 +841,7 @@ fn lookup_global_cache(
input: X::Input,
available_depth: AvailableDepth,
) -> Option<X::Result> {
cx.with_global_cache(self.mode, |cache| {
cx.with_global_cache(|cache| {
let CacheData { result, additional_depth, encountered_overflow, nested_goals } = cache
.get(cx, input, available_depth, |nested_goals| {
Self::candidate_is_applicable(
@ -1041,7 +1030,7 @@ fn insert_global_cache(
) {
let additional_depth = final_entry.reached_depth.as_usize() - self.stack.len();
debug!(?final_entry, ?result, "insert global cache");
cx.with_global_cache(self.mode, |cache| {
cx.with_global_cache(|cache| {
cache.insert(
cx,
input,

13
compiler/rustc_type_ir/src/solve/mod.rs
View File

@ -58,19 +58,6 @@ pub enum Reveal {
All,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum SolverMode {
/// Ordinary trait solving, using everywhere except for coherence.
Normal,
/// Trait solving during coherence. There are a few notable differences
/// between coherence and ordinary trait solving.
///
/// Most importantly, trait solving during coherence must not be incomplete,
/// i.e. return `Err(NoSolution)` for goals for which a solution exists.
/// This means that we must not make any guesses or arbitrary choices.
Coherence,
}
pub type CanonicalInput<I, T = <I as Interner>::Predicate> =
ty::CanonicalQueryInput<I, QueryInput<I, T>>;
pub type CanonicalResponse<I> = Canonical<I, Response<I>>;

4
src/librustdoc/clean/blanket_impl.rs
View File

@ -1,7 +1,7 @@
use rustc_hir as hir;
use rustc_infer::infer::{DefineOpaqueTypes, InferOk, TyCtxtInferExt};
use rustc_infer::traits;
use rustc_middle::ty::{self, Upcast};
use rustc_middle::ty::{self, TypingMode, Upcast};
use rustc_span::DUMMY_SP;
use rustc_span::def_id::DefId;
use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt;
@ -38,7 +38,7 @@ pub(crate) fn synthesize_blanket_impls(
if !matches!(trait_ref.skip_binder().self_ty().kind(), ty::Param(_)) {
continue;
}
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let args = infcx.fresh_args_for_item(DUMMY_SP, item_def_id);
let impl_ty = ty.instantiate(tcx, args);
let param_env = ty::ParamEnv::empty();

6
src/librustdoc/clean/mod.rs
View File

@ -45,7 +45,7 @@
use rustc_hir_analysis::lower_ty;
use rustc_middle::metadata::Reexport;
use rustc_middle::middle::resolve_bound_vars as rbv;
use rustc_middle::ty::{self, AdtKind, GenericArgsRef, Ty, TyCtxt, TypeVisitableExt};
use rustc_middle::ty::{self, AdtKind, GenericArgsRef, Ty, TyCtxt, TypeVisitableExt, TypingMode};
use rustc_middle::{bug, span_bug};
use rustc_span::ExpnKind;
use rustc_span::hygiene::{AstPass, MacroKind};
@ -1863,7 +1863,7 @@ fn normalize<'tcx>(
use rustc_trait_selection::traits::query::normalize::QueryNormalizeExt;
// Try to normalize `<X as Y>::T` to a type
let infcx = cx.tcx.infer_ctxt().build();
let infcx = cx.tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let normalized = infcx
.at(&ObligationCause::dummy(), cx.param_env)
.query_normalize(ty)
@ -2399,7 +2399,7 @@ pub(crate) fn clean_variant_def_with_args<'tcx>(
use rustc_trait_selection::infer::TyCtxtInferExt;
use rustc_trait_selection::traits::query::normalize::QueryNormalizeExt;
let infcx = cx.tcx.infer_ctxt().build();
let infcx = cx.tcx.infer_ctxt().build(TypingMode::non_body_analysis());
let kind = match variant.ctor_kind() {
Some(CtorKind::Const) => VariantKind::CLike,
Some(CtorKind::Fn) => VariantKind::Tuple(

5
src/librustdoc/html/format.rs
View File

@ -20,8 +20,7 @@
use rustc_hir::def::DefKind;
use rustc_hir::def_id::{DefId, LOCAL_CRATE};
use rustc_metadata::creader::{CStore, LoadedMacro};
use rustc_middle::ty;
use rustc_middle::ty::TyCtxt;
use rustc_middle::ty::{self, TyCtxt, TypingMode};
use rustc_span::symbol::kw;
use rustc_span::{Symbol, sym};
use rustc_target::spec::abi::Abi;
@ -613,7 +612,7 @@ fn generate_item_def_id_path(
// No need to try to infer the actual parent item if it's not an associated item from the `impl`
// block.
if def_id != original_def_id && matches!(tcx.def_kind(def_id), DefKind::Impl { .. }) {
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::non_body_analysis());
def_id = infcx
.at(&ObligationCause::dummy(), tcx.param_env(def_id))
.query_normalize(ty::Binder::dummy(tcx.type_of(def_id).instantiate_identity()))

5
src/tools/clippy/clippy_lints/src/eta_reduction.rs
View File

@ -9,7 +9,8 @@
use rustc_infer::infer::TyCtxtInferExt;
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::ty::{
self, Binder, ClosureKind, FnSig, GenericArg, GenericArgKind, List, Region, Ty, TypeVisitableExt, TypeckResults,
self, Binder, ClosureKind, FnSig, GenericArg, GenericArgKind, List, Region, Ty, TypeVisitableExt,
TypeckResults,
};
use rustc_session::declare_lint_pass;
use rustc_span::symbol::sym;
@ -203,7 +204,7 @@ fn check_clousure<'tcx>(cx: &LateContext<'tcx>, outer_receiver: Option<&Expr<'tc
// 'cuz currently nothing changes after deleting this check.
local_used_in(cx, l, args) || local_used_after_expr(cx, l, expr)
}) {
match cx.tcx.infer_ctxt().build().err_ctxt().type_implements_fn_trait(
match cx.tcx.infer_ctxt().build(cx.typing_mode()).err_ctxt().type_implements_fn_trait(
cx.param_env,
Binder::bind_with_vars(callee_ty_adjusted, List::empty()),
ty::PredicatePolarity::Positive,

2
src/tools/clippy/clippy_lints/src/functions/must_use.rs
View File

@ -117,7 +117,7 @@ fn check_needless_must_use(
} else if attr.value_str().is_none() && is_must_use_ty(cx, return_ty(cx, item_id)) {
// Ignore async functions unless Future::Output type is a must_use type
if sig.header.is_async() {
let infcx = cx.tcx.infer_ctxt().build();
let infcx = cx.tcx.infer_ctxt().build(cx.typing_mode());
if let Some(future_ty) = infcx.err_ctxt().get_impl_future_output_ty(return_ty(cx, item_id))
&& !is_must_use_ty(cx, future_ty)
{

2
src/tools/clippy/clippy_lints/src/future_not_send.rs
View File

@ -74,7 +74,7 @@ fn check_fn(
if is_future {
let send_trait = cx.tcx.get_diagnostic_item(sym::Send).unwrap();
let span = decl.output.span();
let infcx = cx.tcx.infer_ctxt().build();
let infcx = cx.tcx.infer_ctxt().build(cx.typing_mode());
let ocx = ObligationCtxt::new_with_diagnostics(&infcx);
let cause = traits::ObligationCause::misc(span, fn_def_id);
ocx.register_bound(cause, cx.param_env, ret_ty, send_trait);

2
src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs
View File

@ -568,7 +568,7 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty<
let obligation = Obligation::new(cx.tcx, ObligationCause::dummy(), cx.param_env, predicate);
!cx.tcx
.infer_ctxt()
.build()
.build(cx.typing_mode())
.predicate_must_hold_modulo_regions(&obligation)
}) {
return false;

2
src/tools/clippy/clippy_lints/src/needless_borrows_for_generic_args.rs
View File

@ -278,7 +278,7 @@ fn needless_borrow_count<'tcx>(
let predicate = EarlyBinder::bind(predicate).instantiate(cx.tcx, &args_with_referent_ty[..]);
let obligation = Obligation::new(cx.tcx, ObligationCause::dummy(), cx.param_env, predicate);
let infcx = cx.tcx.infer_ctxt().build();
let infcx = cx.tcx.infer_ctxt().build(cx.typing_mode());
infcx.predicate_must_hold_modulo_regions(&obligation)
})
};

2
src/tools/clippy/clippy_lints/src/no_effect.rs
View File

@ -160,7 +160,7 @@ fn check_no_effect(&mut self, cx: &LateContext<'_>, stmt: &Stmt<'_>) -> bool {
// Remove `impl Future<Output = T>` to get `T`
if cx.tcx.ty_is_opaque_future(ret_ty)
&& let Some(true_ret_ty) =
cx.tcx.infer_ctxt().build().err_ctxt().get_impl_future_output_ty(ret_ty)
cx.tcx.infer_ctxt().build(cx.typing_mode()).err_ctxt().get_impl_future_output_ty(ret_ty)
{
ret_ty = true_ret_ty;
}

2
src/tools/clippy/clippy_lints/src/ptr.rs
View File

@ -695,7 +695,7 @@ fn matches_preds<'tcx>(
ty: Ty<'tcx>,
preds: &'tcx [ty::PolyExistentialPredicate<'tcx>],
) -> bool {
let infcx = cx.tcx.infer_ctxt().build();
let infcx = cx.tcx.infer_ctxt().build(cx.typing_mode());
preds
.iter()
.all(|&p| match cx.tcx.instantiate_bound_regions_with_erased(p) {

2
src/tools/clippy/clippy_lints/src/useless_conversion.rs
View File

@ -114,7 +114,7 @@ fn into_iter_bound<'tcx>(
if !cx
.tcx
.infer_ctxt()
.build()
.build(cx.typing_mode())
.predicate_must_hold_modulo_regions(&obligation)
{
return None;

4
src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs
View File

@ -17,7 +17,7 @@
};
use rustc_middle::traits::{BuiltinImplSource, ImplSource, ObligationCause};
use rustc_middle::ty::adjustment::PointerCoercion;
use rustc_middle::ty::{self, GenericArgKind, TraitRef, Ty, TyCtxt};
use rustc_middle::ty::{self, GenericArgKind, TraitRef, Ty, TyCtxt, TypingMode};
use rustc_span::Span;
use rustc_span::symbol::sym;
use rustc_trait_selection::traits::{ObligationCtxt, SelectionContext};
@ -420,7 +420,7 @@ fn is_ty_const_destruct_unused<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, body: &Bod
TraitRef::new(tcx, tcx.require_lang_item(LangItem::Destruct, Some(body.span)), [ty]),
);
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(obligation.param_env));
let mut selcx = SelectionContext::new(&infcx);
let Some(impl_src) = selcx.select(&obligation).ok().flatten() else {
return false;

10
src/tools/clippy/clippy_utils/src/ty.rs
View File

@ -19,7 +19,7 @@
use rustc_middle::ty::{
self, AdtDef, AliasTy, AssocItem, AssocKind, Binder, BoundRegion, FnSig, GenericArg, GenericArgKind,
GenericArgsRef, GenericParamDefKind, IntTy, ParamEnv, Region, RegionKind, TraitRef, Ty, TyCtxt, TypeSuperVisitable,
TypeVisitable, TypeVisitableExt, TypeVisitor, UintTy, Upcast, VariantDef, VariantDiscr,
TypeVisitable, TypeVisitableExt, TypeVisitor, UintTy, Upcast, VariantDef, VariantDiscr, TypingMode,
};
use rustc_span::symbol::Ident;
use rustc_span::{DUMMY_SP, Span, Symbol, sym};
@ -268,7 +268,7 @@ pub fn implements_trait_with_env_from_iter<'tcx>(
return false;
}
let infcx = tcx.infer_ctxt().build();
let infcx = tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
let args = args
.into_iter()
.map(|arg| arg.into().unwrap_or_else(|| infcx.next_ty_var(DUMMY_SP).into()))
@ -362,7 +362,7 @@ fn is_normalizable_helper<'tcx>(
}
// prevent recursive loops, false-negative is better than endless loop leading to stack overflow
cache.insert(ty, false);
let infcx = cx.tcx.infer_ctxt().build();
let infcx = cx.tcx.infer_ctxt().build(TypingMode::from_param_env(param_env));
let cause = ObligationCause::dummy();
let result = if infcx.at(&cause, param_env).query_normalize(ty).is_ok() {
match ty.kind() {
@ -1268,7 +1268,7 @@ fn helper<'tcx>(tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>, ty: AliasTy<'tcx>)
let cause = ObligationCause::dummy();
match tcx
.infer_ctxt()
.build()
.build(TypingMode::from_param_env(param_env))
.at(&cause, param_env)
.query_normalize(Ty::new_projection_from_args(tcx, ty.def_id, ty.args))
{
@ -1284,7 +1284,7 @@ fn helper<'tcx>(tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>, ty: AliasTy<'tcx>)
pub fn normalize_with_regions<'tcx>(tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>, ty: Ty<'tcx>) -> Ty<'tcx> {
let cause = ObligationCause::dummy();
match tcx.infer_ctxt().build().at(&cause, param_env).query_normalize(ty) {
match tcx.infer_ctxt().build(TypingMode::from_param_env(param_env)).at(&cause, param_env).query_normalize(ty) {
Ok(ty) => ty.value,
Err(_) => ty,
}