1 use crate::dep_graph::SerializedDepNodeIndex;
2 use crate::mir::interpret::{GlobalId, LitToConstInput};
4 use crate::traits::query::{
5 CanonicalPredicateGoal, CanonicalProjectionGoal, CanonicalTyGoal,
6 CanonicalTypeOpAscribeUserTypeGoal, CanonicalTypeOpEqGoal, CanonicalTypeOpNormalizeGoal,
7 CanonicalTypeOpProvePredicateGoal, CanonicalTypeOpSubtypeGoal,
9 use crate::ty::query::queries;
10 use crate::ty::subst::{GenericArg, SubstsRef};
11 use crate::ty::{self, ParamEnvAnd, Ty, TyCtxt};
12 use rustc_hir::def_id::{CrateNum, DefId, LocalDefId};
13 use rustc_query_system::query::QueryDescription;
15 use rustc_span::symbol::Symbol;
18 fn describe_as_module(def_id: LocalDefId, tcx: TyCtxt<'_>) -> String {
19 if def_id.is_top_level_module() {
20 "top-level module".to_string()
22 format!("module `{}`", tcx.def_path_str(def_id.to_def_id()))
26 // Each of these queries corresponds to a function pointer field in the
27 // `Providers` struct for requesting a value of that type, and a method
28 // on `tcx: TyCtxt` (and `tcx.at(span)`) for doing that request in a way
29 // which memoizes and does dep-graph tracking, wrapping around the actual
30 // `Providers` that the driver creates (using several `rustc_*` crates).
32 // The result type of each query must implement `Clone`, and additionally
33 // `ty::query::values::Value`, which produces an appropriate placeholder
34 // (error) value if the query resulted in a query cycle.
35 // Queries marked with `fatal_cycle` do not need the latter implementation,
36 // as they will raise an fatal error on query cycles instead.
39 query trigger_delay_span_bug(key: DefId) -> () {
40 desc { "trigger a delay span bug" }
45 /// Represents crate as a whole (as distinct from the top-level crate module).
46 /// If you call `hir_crate` (e.g., indirectly by calling `tcx.hir().krate()`),
47 /// we will have to assume that any change means that you need to be recompiled.
48 /// This is because the `hir_crate` query gives you access to all other items.
49 /// To avoid this fate, do not call `tcx.hir().krate()`; instead,
50 /// prefer wrappers like `tcx.visit_all_items_in_krate()`.
51 query hir_crate(key: CrateNum) -> &'tcx Crate<'tcx> {
54 desc { "get the crate HIR" }
57 /// The indexed HIR. This can be conveniently accessed by `tcx.hir()`.
58 /// Avoid calling this query directly.
59 query index_hir(_: CrateNum) -> &'tcx map::IndexedHir<'tcx> {
65 /// The items in a module.
67 /// This can be conveniently accessed by `tcx.hir().visit_item_likes_in_module`.
68 /// Avoid calling this query directly.
69 query hir_module_items(key: LocalDefId) -> &'tcx hir::ModuleItems {
71 desc { |tcx| "HIR module items in `{}`", tcx.def_path_str(key.to_def_id()) }
74 /// Gives access to the HIR node for the HIR owner `key`.
76 /// This can be conveniently accessed by methods on `tcx.hir()`.
77 /// Avoid calling this query directly.
78 query hir_owner(key: LocalDefId) -> Option<&'tcx crate::hir::Owner<'tcx>> {
80 desc { |tcx| "HIR owner of `{}`", tcx.def_path_str(key.to_def_id()) }
83 /// Gives access to the HIR nodes and bodies inside the HIR owner `key`.
85 /// This can be conveniently accessed by methods on `tcx.hir()`.
86 /// Avoid calling this query directly.
87 query hir_owner_nodes(key: LocalDefId) -> Option<&'tcx crate::hir::OwnerNodes<'tcx>> {
89 desc { |tcx| "HIR owner items in `{}`", tcx.def_path_str(key.to_def_id()) }
92 /// Computes the `DefId` of the corresponding const parameter in case the `key` is a
93 /// const argument and returns `None` otherwise.
95 /// ```ignore (incomplete)
96 /// let a = foo::<7>();
97 /// // ^ Calling `opt_const_param_of` for this argument,
99 /// fn foo<const N: usize>()
100 /// // ^ returns this `DefId`.
103 /// // ^ While calling `opt_const_param_of` for other bodies returns `None`.
106 // It looks like caching this query on disk actually slightly
107 // worsened performance in #74376.
109 // Once const generics are more prevalently used, we might want to
110 // consider only caching calls returning `Some`.
111 query opt_const_param_of(key: LocalDefId) -> Option<DefId> {
112 desc { |tcx| "computing the optional const parameter of `{}`", tcx.def_path_str(key.to_def_id()) }
115 /// Records the type of every item.
116 query type_of(key: DefId) -> Ty<'tcx> {
117 desc { |tcx| "computing type of `{}`", tcx.def_path_str(key) }
118 cache_on_disk_if { key.is_local() }
121 query analysis(key: CrateNum) -> Result<(), ErrorReported> {
123 desc { "running analysis passes on this crate" }
126 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to its
127 /// associated generics.
128 query generics_of(key: DefId) -> ty::Generics {
129 desc { |tcx| "computing generics of `{}`", tcx.def_path_str(key) }
130 storage(ArenaCacheSelector<'tcx>)
131 cache_on_disk_if { key.is_local() }
132 load_cached(tcx, id) {
133 let generics: Option<ty::Generics> = tcx.queries.on_disk_cache.as_ref()
134 .and_then(|c| c.try_load_query_result(tcx, id));
139 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
140 /// predicates (where-clauses) that must be proven true in order
141 /// to reference it. This is almost always the "predicates query"
144 /// `predicates_of` builds on `predicates_defined_on` -- in fact,
145 /// it is almost always the same as that query, except for the
146 /// case of traits. For traits, `predicates_of` contains
147 /// an additional `Self: Trait<...>` predicate that users don't
148 /// actually write. This reflects the fact that to invoke the
149 /// trait (e.g., via `Default::default`) you must supply types
150 /// that actually implement the trait. (However, this extra
151 /// predicate gets in the way of some checks, which are intended
152 /// to operate over only the actual where-clauses written by the
154 query predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
155 desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
156 cache_on_disk_if { key.is_local() }
159 /// Returns the list of bounds that can be used for
160 /// `SelectionCandidate::ProjectionCandidate(_)` and
161 /// `ProjectionTyCandidate::TraitDef`.
162 /// Specifically this is the bounds written on the trait's type
163 /// definition, or those after the `impl` keyword
165 /// ```ignore (incomplete)
166 /// type X: Bound + 'lt
168 /// impl Debug + Display
169 /// // ^^^^^^^^^^^^^^^
172 /// `key` is the `DefId` of the associated type or opaque type.
174 /// Bounds from the parent (e.g. with nested impl trait) are not included.
175 query explicit_item_bounds(key: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {
176 desc { |tcx| "finding item bounds for `{}`", tcx.def_path_str(key) }
179 /// Elaborated version of the predicates from `explicit_item_bounds`.
185 /// type MyAType: Eq + ?Sized;
189 /// `explicit_item_bounds` returns `[<Self as MyTrait>::MyAType: Eq]`,
190 /// and `item_bounds` returns
193 /// <Self as Trait>::MyAType: Eq,
194 /// <Self as Trait>::MyAType: PartialEq<<Self as Trait>::MyAType>
198 /// Bounds from the parent (e.g. with nested impl trait) are not included.
199 query item_bounds(key: DefId) -> &'tcx ty::List<ty::Predicate<'tcx>> {
200 desc { |tcx| "elaborating item bounds for `{}`", tcx.def_path_str(key) }
203 query projection_ty_from_predicates(key: (DefId, DefId)) -> Option<ty::ProjectionTy<'tcx>> {
204 desc { |tcx| "finding projection type inside predicates of `{}`", tcx.def_path_str(key.0) }
207 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLib>> {
208 desc { "looking up the native libraries of a linked crate" }
211 query lint_levels(_: CrateNum) -> LintLevelMap {
212 storage(ArenaCacheSelector<'tcx>)
214 desc { "computing the lint levels for items in this crate" }
217 query parent_module_from_def_id(key: LocalDefId) -> LocalDefId {
219 desc { |tcx| "parent module of `{}`", tcx.def_path_str(key.to_def_id()) }
222 /// Internal helper query. Use `tcx.expansion_that_defined` instead
223 query expn_that_defined(key: DefId) -> rustc_span::ExpnId {
224 desc { |tcx| "expansion that defined `{}`", tcx.def_path_str(key) }
229 query is_panic_runtime(_: CrateNum) -> bool {
231 desc { "checking if the crate is_panic_runtime" }
236 /// Set of all the `DefId`s in this crate that have MIR associated with
237 /// them. This includes all the body owners, but also things like struct
239 query mir_keys(_: CrateNum) -> FxHashSet<LocalDefId> {
240 storage(ArenaCacheSelector<'tcx>)
241 desc { "getting a list of all mir_keys" }
244 /// Maps DefId's that have an associated `mir::Body` to the result
245 /// of the MIR const-checking pass. This is the set of qualifs in
246 /// the final value of a `const`.
247 query mir_const_qualif(key: DefId) -> mir::ConstQualifs {
248 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
249 cache_on_disk_if { key.is_local() }
251 query mir_const_qualif_const_arg(
252 key: (LocalDefId, DefId)
253 ) -> mir::ConstQualifs {
255 |tcx| "const checking the const argument `{}`",
256 tcx.def_path_str(key.0.to_def_id())
260 /// Fetch the MIR for a given `DefId` right after it's built - this includes
261 /// unreachable code.
262 query mir_built(key: ty::WithOptConstParam<LocalDefId>) -> &'tcx Steal<mir::Body<'tcx>> {
263 desc { |tcx| "building MIR for `{}`", tcx.def_path_str(key.did.to_def_id()) }
266 /// Fetch the MIR for a given `DefId` up till the point where it is
267 /// ready for const qualification.
269 /// See the README for the `mir` module for details.
270 query mir_const(key: ty::WithOptConstParam<LocalDefId>) -> &'tcx Steal<mir::Body<'tcx>> {
272 |tcx| "processing MIR for {}`{}`",
273 if key.const_param_did.is_some() { "the const argument " } else { "" },
274 tcx.def_path_str(key.did.to_def_id()),
279 /// Try to build an abstract representation of the given constant.
280 query mir_abstract_const(
282 ) -> Result<Option<&'tcx [mir::abstract_const::Node<'tcx>]>, ErrorReported> {
284 |tcx| "building an abstract representation for {}", tcx.def_path_str(key),
287 /// Try to build an abstract representation of the given constant.
288 query mir_abstract_const_of_const_arg(
289 key: (LocalDefId, DefId)
290 ) -> Result<Option<&'tcx [mir::abstract_const::Node<'tcx>]>, ErrorReported> {
293 "building an abstract representation for the const argument {}",
294 tcx.def_path_str(key.0.to_def_id()),
298 query try_unify_abstract_consts(key: (
299 (ty::WithOptConstParam<DefId>, SubstsRef<'tcx>),
300 (ty::WithOptConstParam<DefId>, SubstsRef<'tcx>)
303 |tcx| "trying to unify the generic constants {} and {}",
304 tcx.def_path_str(key.0.0.did), tcx.def_path_str(key.1.0.did)
308 query mir_drops_elaborated_and_const_checked(
309 key: ty::WithOptConstParam<LocalDefId>
310 ) -> &'tcx Steal<mir::Body<'tcx>> {
312 desc { |tcx| "elaborating drops for `{}`", tcx.def_path_str(key.did.to_def_id()) }
315 query mir_promoted(key: ty::WithOptConstParam<LocalDefId>) ->
317 &'tcx Steal<mir::Body<'tcx>>,
318 &'tcx Steal<IndexVec<mir::Promoted, mir::Body<'tcx>>>
322 |tcx| "processing {}`{}`",
323 if key.const_param_did.is_some() { "the const argument " } else { "" },
324 tcx.def_path_str(key.did.to_def_id()),
328 /// MIR after our optimization passes have run. This is MIR that is ready
329 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
330 query optimized_mir(key: DefId) -> &'tcx mir::Body<'tcx> {
331 desc { |tcx| "optimizing MIR for `{}`", tcx.def_path_str(key) }
332 cache_on_disk_if { key.is_local() }
334 query optimized_mir_of_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::Body<'tcx> {
336 |tcx| "optimizing MIR for the const argument `{}`",
337 tcx.def_path_str(key.0.to_def_id())
341 /// Returns coverage summary info for a function, after executing the `InstrumentCoverage`
342 /// MIR pass (assuming the -Zinstrument-coverage option is enabled).
343 query coverageinfo(key: DefId) -> mir::CoverageInfo {
344 desc { |tcx| "retrieving coverage info from MIR for `{}`", tcx.def_path_str(key) }
345 storage(ArenaCacheSelector<'tcx>)
346 cache_on_disk_if { key.is_local() }
349 /// The `DefId` is the `DefId` of the containing MIR body. Promoteds do not have their own
350 /// `DefId`. This function returns all promoteds in the specified body. The body references
351 /// promoteds by the `DefId` and the `mir::Promoted` index. This is necessary, because
352 /// after inlining a body may refer to promoteds from other bodies. In that case you still
353 /// need to use the `DefId` of the original body.
354 query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
355 desc { |tcx| "optimizing promoted MIR for `{}`", tcx.def_path_str(key) }
356 cache_on_disk_if { key.is_local() }
358 query promoted_mir_of_const_arg(
359 key: (LocalDefId, DefId)
360 ) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
362 |tcx| "optimizing promoted MIR for the const argument `{}`",
363 tcx.def_path_str(key.0.to_def_id()),
369 /// Erases regions from `ty` to yield a new type.
370 /// Normally you would just use `tcx.erase_regions(value)`,
371 /// however, which uses this query as a kind of cache.
372 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
373 // This query is not expected to have input -- as a result, it
374 // is not a good candidates for "replay" because it is essentially a
375 // pure function of its input (and hence the expectation is that
376 // no caller would be green **apart** from just these
377 // queries). Making it anonymous avoids hashing the result, which
378 // may save a bit of time.
380 desc { "erasing regions from `{:?}`", ty }
385 query wasm_import_module_map(_: CrateNum) -> FxHashMap<DefId, String> {
386 storage(ArenaCacheSelector<'tcx>)
387 desc { "wasm import module map" }
392 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
393 /// predicates (where-clauses) directly defined on it. This is
394 /// equal to the `explicit_predicates_of` predicates plus the
395 /// `inferred_outlives_of` predicates.
396 query predicates_defined_on(key: DefId) -> ty::GenericPredicates<'tcx> {
397 desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
400 /// Returns everything that looks like a predicate written explicitly
401 /// by the user on a trait item.
403 /// Traits are unusual, because predicates on associated types are
404 /// converted into bounds on that type for backwards compatibility:
406 /// trait X where Self::U: Copy { type U; }
410 /// trait X { type U: Copy; }
412 /// `explicit_predicates_of` and `explicit_item_bounds` will then take
413 /// the appropriate subsets of the predicates here.
414 query trait_explicit_predicates_and_bounds(key: LocalDefId) -> ty::GenericPredicates<'tcx> {
415 desc { |tcx| "computing explicit predicates of trait `{}`", tcx.def_path_str(key.to_def_id()) }
418 /// Returns the predicates written explicitly by the user.
419 query explicit_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
420 desc { |tcx| "computing explicit predicates of `{}`", tcx.def_path_str(key) }
423 /// Returns the inferred outlives predicates (e.g., for `struct
424 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
425 query inferred_outlives_of(key: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {
426 desc { |tcx| "computing inferred outlives predicates of `{}`", tcx.def_path_str(key) }
429 /// Maps from the `DefId` of a trait to the list of
430 /// super-predicates. This is a subset of the full list of
431 /// predicates. We store these in a separate map because we must
432 /// evaluate them even during type conversion, often before the
433 /// full predicates are available (note that supertraits have
434 /// additional acyclicity requirements).
435 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
436 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
439 /// To avoid cycles within the predicates of a single item we compute
440 /// per-type-parameter predicates for resolving `T::AssocTy`.
441 query type_param_predicates(key: (DefId, LocalDefId, rustc_span::symbol::Ident)) -> ty::GenericPredicates<'tcx> {
442 desc { |tcx| "computing the bounds for type parameter `{}`", {
443 let id = tcx.hir().local_def_id_to_hir_id(key.1);
444 tcx.hir().ty_param_name(id)
448 query trait_def(key: DefId) -> ty::TraitDef {
449 desc { |tcx| "computing trait definition for `{}`", tcx.def_path_str(key) }
450 storage(ArenaCacheSelector<'tcx>)
452 query adt_def(key: DefId) -> &'tcx ty::AdtDef {
453 desc { |tcx| "computing ADT definition for `{}`", tcx.def_path_str(key) }
455 query adt_destructor(key: DefId) -> Option<ty::Destructor> {
456 desc { |tcx| "computing `Drop` impl for `{}`", tcx.def_path_str(key) }
459 // The cycle error here should be reported as an error by `check_representable`.
460 // We consider the type as Sized in the meanwhile to avoid
461 // further errors (done in impl Value for AdtSizedConstraint).
462 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
463 // in case we accidentally otherwise don't emit an error.
464 query adt_sized_constraint(
466 ) -> AdtSizedConstraint<'tcx> {
467 desc { |tcx| "computing `Sized` constraints for `{}`", tcx.def_path_str(key) }
471 query adt_dtorck_constraint(
473 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {
474 desc { |tcx| "computing drop-check constraints for `{}`", tcx.def_path_str(key) }
477 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
478 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
479 /// not have the feature gate active).
481 /// **Do not call this function manually.** It is only meant to cache the base data for the
482 /// `is_const_fn` function.
483 query is_const_fn_raw(key: DefId) -> bool {
484 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
487 /// Returns `true` if this is a const `impl`. **Do not call this function manually.**
489 /// This query caches the base data for the `is_const_impl` helper function, which also
490 /// takes into account stability attributes (e.g., `#[rustc_const_unstable]`).
491 query is_const_impl_raw(key: DefId) -> bool {
492 desc { |tcx| "checking if item is const impl: `{}`", tcx.def_path_str(key) }
495 query asyncness(key: DefId) -> hir::IsAsync {
496 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
499 /// Returns `true` if calls to the function may be promoted.
501 /// This is either because the function is e.g., a tuple-struct or tuple-variant
502 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
503 /// be removed in the future in favour of some form of check which figures out whether the
504 /// function does not inspect the bits of any of its arguments (so is essentially just a
505 /// constructor function).
506 query is_promotable_const_fn(key: DefId) -> bool {
507 desc { |tcx| "checking if item is promotable: `{}`", tcx.def_path_str(key) }
510 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
511 query is_foreign_item(key: DefId) -> bool {
512 desc { |tcx| "checking if `{}` is a foreign item", tcx.def_path_str(key) }
515 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
516 query static_mutability(def_id: DefId) -> Option<hir::Mutability> {
517 desc { |tcx| "looking up static mutability of `{}`", tcx.def_path_str(def_id) }
520 /// Returns `Some(generator_kind)` if the node pointed to by `def_id` is a generator.
521 query generator_kind(def_id: DefId) -> Option<hir::GeneratorKind> {
522 desc { |tcx| "looking up generator kind of `{}`", tcx.def_path_str(def_id) }
525 /// Gets a map with the variance of every item; use `item_variance` instead.
526 query crate_variances(_: CrateNum) -> ty::CrateVariancesMap<'tcx> {
527 storage(ArenaCacheSelector<'tcx>)
528 desc { "computing the variances for items in this crate" }
531 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
532 query variances_of(def_id: DefId) -> &'tcx [ty::Variance] {
533 desc { |tcx| "computing the variances of `{}`", tcx.def_path_str(def_id) }
538 /// Maps from thee `DefId` of a type to its (inferred) outlives.
539 query inferred_outlives_crate(_: CrateNum)
540 -> ty::CratePredicatesMap<'tcx> {
541 storage(ArenaCacheSelector<'tcx>)
542 desc { "computing the inferred outlives predicates for items in this crate" }
547 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
548 query associated_item_def_ids(key: DefId) -> &'tcx [DefId] {
549 desc { |tcx| "collecting associated items of `{}`", tcx.def_path_str(key) }
552 /// Maps from a trait item to the trait item "descriptor".
553 query associated_item(key: DefId) -> ty::AssocItem {
554 desc { |tcx| "computing associated item data for `{}`", tcx.def_path_str(key) }
555 storage(ArenaCacheSelector<'tcx>)
558 /// Collects the associated items defined on a trait or impl.
559 query associated_items(key: DefId) -> ty::AssociatedItems<'tcx> {
560 storage(ArenaCacheSelector<'tcx>)
561 desc { |tcx| "collecting associated items of {}", tcx.def_path_str(key) }
564 query impl_trait_ref(key: DefId) -> Option<ty::TraitRef<'tcx>> {
565 desc { |tcx| "computing trait implemented by `{}`", tcx.def_path_str(key) }
567 query impl_polarity(key: DefId) -> ty::ImplPolarity {
568 desc { |tcx| "computing implementation polarity of `{}`", tcx.def_path_str(key) }
571 query issue33140_self_ty(key: DefId) -> Option<ty::Ty<'tcx>> {
572 desc { |tcx| "computing Self type wrt issue #33140 `{}`", tcx.def_path_str(key) }
577 /// Maps a `DefId` of a type to a list of its inherent impls.
578 /// Contains implementations of methods that are inherent to a type.
579 /// Methods in these implementations don't need to be exported.
580 query inherent_impls(key: DefId) -> &'tcx [DefId] {
581 desc { |tcx| "collecting inherent impls for `{}`", tcx.def_path_str(key) }
587 /// The result of unsafety-checking this `LocalDefId`.
588 query unsafety_check_result(key: LocalDefId) -> &'tcx mir::UnsafetyCheckResult {
589 desc { |tcx| "unsafety-checking `{}`", tcx.def_path_str(key.to_def_id()) }
590 cache_on_disk_if { true }
592 query unsafety_check_result_for_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::UnsafetyCheckResult {
594 |tcx| "unsafety-checking the const argument `{}`",
595 tcx.def_path_str(key.0.to_def_id())
599 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error.
601 /// Unsafety checking is executed for each method separately, but we only want
602 /// to emit this error once per derive. As there are some impls with multiple
603 /// methods, we use a query for deduplication.
604 query unsafe_derive_on_repr_packed(key: LocalDefId) -> () {
605 desc { |tcx| "processing `{}`", tcx.def_path_str(key.to_def_id()) }
608 /// The signature of functions.
609 query fn_sig(key: DefId) -> ty::PolyFnSig<'tcx> {
610 desc { |tcx| "computing function signature of `{}`", tcx.def_path_str(key) }
615 query lint_mod(key: LocalDefId) -> () {
616 desc { |tcx| "linting {}", describe_as_module(key, tcx) }
619 /// Checks the attributes in the module.
620 query check_mod_attrs(key: LocalDefId) -> () {
621 desc { |tcx| "checking attributes in {}", describe_as_module(key, tcx) }
624 query check_mod_unstable_api_usage(key: LocalDefId) -> () {
625 desc { |tcx| "checking for unstable API usage in {}", describe_as_module(key, tcx) }
628 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
629 query check_mod_const_bodies(key: LocalDefId) -> () {
630 desc { |tcx| "checking consts in {}", describe_as_module(key, tcx) }
633 /// Checks the loops in the module.
634 query check_mod_loops(key: LocalDefId) -> () {
635 desc { |tcx| "checking loops in {}", describe_as_module(key, tcx) }
638 query check_mod_naked_functions(key: LocalDefId) -> () {
639 desc { |tcx| "checking naked functions in {}", describe_as_module(key, tcx) }
642 query check_mod_item_types(key: LocalDefId) -> () {
643 desc { |tcx| "checking item types in {}", describe_as_module(key, tcx) }
646 query check_mod_privacy(key: LocalDefId) -> () {
647 desc { |tcx| "checking privacy in {}", describe_as_module(key, tcx) }
650 query check_mod_intrinsics(key: LocalDefId) -> () {
651 desc { |tcx| "checking intrinsics in {}", describe_as_module(key, tcx) }
654 query check_mod_liveness(key: LocalDefId) -> () {
655 desc { |tcx| "checking liveness of variables in {}", describe_as_module(key, tcx) }
658 query check_mod_impl_wf(key: LocalDefId) -> () {
659 desc { |tcx| "checking that impls are well-formed in {}", describe_as_module(key, tcx) }
662 query collect_mod_item_types(key: LocalDefId) -> () {
663 desc { |tcx| "collecting item types in {}", describe_as_module(key, tcx) }
666 /// Caches `CoerceUnsized` kinds for impls on custom types.
667 query coerce_unsized_info(key: DefId)
668 -> ty::adjustment::CoerceUnsizedInfo {
669 desc { |tcx| "computing CoerceUnsized info for `{}`", tcx.def_path_str(key) }
674 query typeck_item_bodies(_: CrateNum) -> () {
675 desc { "type-checking all item bodies" }
678 query typeck(key: LocalDefId) -> &'tcx ty::TypeckResults<'tcx> {
679 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
680 cache_on_disk_if { true }
682 query typeck_const_arg(
683 key: (LocalDefId, DefId)
684 ) -> &'tcx ty::TypeckResults<'tcx> {
686 |tcx| "type-checking the const argument `{}`",
687 tcx.def_path_str(key.0.to_def_id()),
690 query diagnostic_only_typeck(key: LocalDefId) -> &'tcx ty::TypeckResults<'tcx> {
691 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
692 cache_on_disk_if { true }
693 load_cached(tcx, id) {
694 let typeck_results: Option<ty::TypeckResults<'tcx>> = tcx
695 .queries.on_disk_cache.as_ref()
696 .and_then(|c| c.try_load_query_result(tcx, id));
698 typeck_results.map(|x| &*tcx.arena.alloc(x))
704 query used_trait_imports(key: LocalDefId) -> &'tcx FxHashSet<LocalDefId> {
705 desc { |tcx| "used_trait_imports `{}`", tcx.def_path_str(key.to_def_id()) }
706 cache_on_disk_if { true }
711 query has_typeck_results(def_id: DefId) -> bool {
712 desc { |tcx| "checking whether `{}` has a body", tcx.def_path_str(def_id) }
715 query coherent_trait(def_id: DefId) -> () {
716 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
721 /// Borrow-checks the function body. If this is a closure, returns
722 /// additional requirements that the closure's creator must verify.
723 query mir_borrowck(key: LocalDefId) -> &'tcx mir::BorrowCheckResult<'tcx> {
724 desc { |tcx| "borrow-checking `{}`", tcx.def_path_str(key.to_def_id()) }
725 cache_on_disk_if(tcx, opt_result) {
726 tcx.is_closure(key.to_def_id())
727 || opt_result.map_or(false, |r| !r.concrete_opaque_types.is_empty())
730 query mir_borrowck_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::BorrowCheckResult<'tcx> {
732 |tcx| "borrow-checking the const argument`{}`",
733 tcx.def_path_str(key.0.to_def_id())
739 /// Gets a complete map from all types to their inherent impls.
740 /// Not meant to be used directly outside of coherence.
741 /// (Defined only for `LOCAL_CRATE`.)
742 query crate_inherent_impls(k: CrateNum)
743 -> CrateInherentImpls {
744 storage(ArenaCacheSelector<'tcx>)
746 desc { "all inherent impls defined in crate `{:?}`", k }
749 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
750 /// Not meant to be used directly outside of coherence.
751 /// (Defined only for `LOCAL_CRATE`.)
752 query crate_inherent_impls_overlap_check(_: CrateNum)
755 desc { "check for overlap between inherent impls defined in this crate" }
760 /// Evaluates a constant and returns the computed allocation.
762 /// **Do not use this** directly, use the `tcx.eval_static_initializer` wrapper.
763 query eval_to_allocation_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
764 -> EvalToAllocationRawResult<'tcx> {
766 "const-evaluating + checking `{}`",
767 key.value.display(tcx)
769 cache_on_disk_if { true }
772 /// Evaluates const items or anonymous constants
773 /// (such as enum variant explicit discriminants or array lengths)
774 /// into a representation suitable for the type system and const generics.
776 /// **Do not use this** directly, use one of the following wrappers: `tcx.const_eval_poly`,
777 /// `tcx.const_eval_resolve`, `tcx.const_eval_instance`, or `tcx.const_eval_global_id`.
778 query eval_to_const_value_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
779 -> EvalToConstValueResult<'tcx> {
781 "simplifying constant for the type system `{}`",
782 key.value.display(tcx)
784 cache_on_disk_if { true }
787 /// Destructure a constant ADT or array into its variant index and its
789 query destructure_const(
790 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
791 ) -> mir::DestructuredConst<'tcx> {
792 desc { "destructure constant" }
795 /// Dereference a constant reference or raw pointer and turn the result into a constant
798 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
799 ) -> &'tcx ty::Const<'tcx> {
800 desc { "deref constant" }
803 query const_caller_location(key: (rustc_span::Symbol, u32, u32)) -> ConstValue<'tcx> {
804 desc { "get a &core::panic::Location referring to a span" }
808 key: LitToConstInput<'tcx>
809 ) -> Result<&'tcx ty::Const<'tcx>, LitToConstError> {
810 desc { "converting literal to const" }
815 query check_match(key: DefId) {
816 desc { |tcx| "match-checking `{}`", tcx.def_path_str(key) }
817 cache_on_disk_if { key.is_local() }
820 /// Performs part of the privacy check and computes "access levels".
821 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
823 desc { "privacy access levels" }
825 query check_private_in_public(_: CrateNum) -> () {
827 desc { "checking for private elements in public interfaces" }
832 query reachable_set(_: CrateNum) -> FxHashSet<LocalDefId> {
833 storage(ArenaCacheSelector<'tcx>)
834 desc { "reachability" }
837 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
838 /// in the case of closures, this will be redirected to the enclosing function.
839 query region_scope_tree(def_id: DefId) -> &'tcx region::ScopeTree {
840 desc { |tcx| "computing drop scopes for `{}`", tcx.def_path_str(def_id) }
843 query mir_shims(key: ty::InstanceDef<'tcx>) -> mir::Body<'tcx> {
844 storage(ArenaCacheSelector<'tcx>)
845 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
848 /// The `symbol_name` query provides the symbol name for calling a
849 /// given instance from the local crate. In particular, it will also
850 /// look up the correct symbol name of instances from upstream crates.
851 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName<'tcx> {
852 desc { "computing the symbol for `{}`", key }
853 cache_on_disk_if { true }
856 query def_kind(def_id: DefId) -> DefKind {
857 desc { |tcx| "looking up definition kind of `{}`", tcx.def_path_str(def_id) }
859 query def_span(def_id: DefId) -> Span {
860 desc { |tcx| "looking up span for `{}`", tcx.def_path_str(def_id) }
861 // FIXME(mw): DefSpans are not really inputs since they are derived from
862 // HIR. But at the moment HIR hashing still contains some hacks that allow
863 // to make type debuginfo to be source location independent. Declaring
864 // DefSpan an input makes sure that changes to these are always detected
865 // regardless of HIR hashing.
868 query lookup_stability(def_id: DefId) -> Option<&'tcx attr::Stability> {
869 desc { |tcx| "looking up stability of `{}`", tcx.def_path_str(def_id) }
871 query lookup_const_stability(def_id: DefId) -> Option<&'tcx attr::ConstStability> {
872 desc { |tcx| "looking up const stability of `{}`", tcx.def_path_str(def_id) }
874 query lookup_deprecation_entry(def_id: DefId) -> Option<DeprecationEntry> {
875 desc { |tcx| "checking whether `{}` is deprecated", tcx.def_path_str(def_id) }
877 query item_attrs(def_id: DefId) -> &'tcx [ast::Attribute] {
878 desc { |tcx| "collecting attributes of `{}`", tcx.def_path_str(def_id) }
883 query codegen_fn_attrs(def_id: DefId) -> CodegenFnAttrs {
884 desc { |tcx| "computing codegen attributes of `{}`", tcx.def_path_str(def_id) }
885 storage(ArenaCacheSelector<'tcx>)
886 cache_on_disk_if { true }
891 query fn_arg_names(def_id: DefId) -> &'tcx [rustc_span::symbol::Ident] {
892 desc { |tcx| "looking up function parameter names for `{}`", tcx.def_path_str(def_id) }
894 /// Gets the rendered value of the specified constant or associated constant.
896 query rendered_const(def_id: DefId) -> String {
897 desc { |tcx| "rendering constant intializer of `{}`", tcx.def_path_str(def_id) }
899 query impl_parent(def_id: DefId) -> Option<DefId> {
900 desc { |tcx| "computing specialization parent impl of `{}`", tcx.def_path_str(def_id) }
905 query trait_of_item(def_id: DefId) -> Option<DefId> {
906 desc { |tcx| "finding trait defining `{}`", tcx.def_path_str(def_id) }
911 query is_mir_available(key: DefId) -> bool {
912 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
917 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
918 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
919 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
924 query codegen_fulfill_obligation(
925 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
926 ) -> Result<ImplSource<'tcx, ()>, ErrorReported> {
927 cache_on_disk_if { true }
929 "checking if `{}` fulfills its obligations",
930 tcx.def_path_str(key.1.def_id())
936 query all_local_trait_impls(key: CrateNum) -> &'tcx BTreeMap<DefId, Vec<hir::HirId>> {
937 desc { "local trait impls" }
939 query trait_impls_of(key: DefId) -> ty::trait_def::TraitImpls {
940 storage(ArenaCacheSelector<'tcx>)
941 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
943 query specialization_graph_of(key: DefId) -> specialization_graph::Graph {
944 storage(ArenaCacheSelector<'tcx>)
945 desc { |tcx| "building specialization graph of trait `{}`", tcx.def_path_str(key) }
946 cache_on_disk_if { true }
948 query object_safety_violations(key: DefId) -> &'tcx [traits::ObjectSafetyViolation] {
949 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
952 /// Gets the ParameterEnvironment for a given item; this environment
953 /// will be in "user-facing" mode, meaning that it is suitable for
954 /// type-checking etc, and it does not normalize specializable
955 /// associated types. This is almost always what you want,
956 /// unless you are doing MIR optimizations, in which case you
957 query param_env(def_id: DefId) -> ty::ParamEnv<'tcx> {
958 desc { |tcx| "computing normalized predicates of `{}`", tcx.def_path_str(def_id) }
961 /// Like `param_env`, but returns the `ParamEnv in `Reveal::All` mode.
962 /// Prefer this over `tcx.param_env(def_id).with_reveal_all_normalized(tcx)`,
963 /// as this method is more efficient.
964 query param_env_reveal_all_normalized(def_id: DefId) -> ty::ParamEnv<'tcx> {
965 desc { |tcx| "computing revealed normalized predicates of `{}`", tcx.def_path_str(def_id) }
968 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
969 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
970 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
971 desc { "computing whether `{}` is `Copy`", env.value }
973 /// Query backing `TyS::is_sized`.
974 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
975 desc { "computing whether `{}` is `Sized`", env.value }
977 /// Query backing `TyS::is_freeze`.
978 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
979 desc { "computing whether `{}` is freeze", env.value }
981 /// Query backing `TyS::needs_drop`.
982 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
983 desc { "computing whether `{}` needs drop", env.value }
986 /// Query backing `TyS::is_structural_eq_shallow`.
988 /// This is only correct for ADTs. Call `is_structural_eq_shallow` to handle all types
990 query has_structural_eq_impls(ty: Ty<'tcx>) -> bool {
992 "computing whether `{:?}` implements `PartialStructuralEq` and `StructuralEq`",
997 /// A list of types where the ADT requires drop if and only if any of
998 /// those types require drop. If the ADT is known to always need drop
999 /// then `Err(AlwaysRequiresDrop)` is returned.
1000 query adt_drop_tys(def_id: DefId) -> Result<&'tcx ty::List<Ty<'tcx>>, AlwaysRequiresDrop> {
1001 desc { |tcx| "computing when `{}` needs drop", tcx.def_path_str(def_id) }
1002 cache_on_disk_if { true }
1006 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
1007 ) -> Result<&'tcx rustc_target::abi::Layout, ty::layout::LayoutError<'tcx>> {
1008 desc { "computing layout of `{}`", env.value }
1013 query dylib_dependency_formats(_: CrateNum)
1014 -> &'tcx [(CrateNum, LinkagePreference)] {
1015 desc { "dylib dependency formats of crate" }
1018 query dependency_formats(_: CrateNum)
1019 -> Lrc<crate::middle::dependency_format::Dependencies>
1021 desc { "get the linkage format of all dependencies" }
1026 query is_compiler_builtins(_: CrateNum) -> bool {
1028 desc { "checking if the crate is_compiler_builtins" }
1030 query has_global_allocator(_: CrateNum) -> bool {
1032 desc { "checking if the crate has_global_allocator" }
1034 query has_panic_handler(_: CrateNum) -> bool {
1036 desc { "checking if the crate has_panic_handler" }
1038 query is_profiler_runtime(_: CrateNum) -> bool {
1040 desc { "query a crate is `#![profiler_runtime]`" }
1042 query panic_strategy(_: CrateNum) -> PanicStrategy {
1044 desc { "query a crate's configured panic strategy" }
1046 query is_no_builtins(_: CrateNum) -> bool {
1048 desc { "test whether a crate has `#![no_builtins]`" }
1050 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
1052 desc { "query a crate's symbol mangling version" }
1055 query extern_crate(def_id: DefId) -> Option<&'tcx ExternCrate> {
1057 desc { "getting crate's ExternCrateData" }
1062 query specializes(_: (DefId, DefId)) -> bool {
1063 desc { "computing whether impls specialize one another" }
1065 query in_scope_traits_map(_: LocalDefId)
1066 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
1068 desc { "traits in scope at a block" }
1073 query module_exports(def_id: LocalDefId) -> Option<&'tcx [Export<LocalDefId>]> {
1074 desc { |tcx| "looking up items exported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
1080 query impl_defaultness(def_id: DefId) -> hir::Defaultness {
1081 desc { |tcx| "looking up whether `{}` is a default impl", tcx.def_path_str(def_id) }
1084 query check_item_well_formed(key: LocalDefId) -> () {
1085 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1087 query check_trait_item_well_formed(key: LocalDefId) -> () {
1088 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1090 query check_impl_item_well_formed(key: LocalDefId) -> () {
1091 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1097 // The `DefId`s of all non-generic functions and statics in the given crate
1098 // that can be reached from outside the crate.
1100 // We expect this items to be available for being linked to.
1102 // This query can also be called for `LOCAL_CRATE`. In this case it will
1103 // compute which items will be reachable to other crates, taking into account
1104 // the kind of crate that is currently compiled. Crates with only a
1105 // C interface have fewer reachable things.
1107 // Does not include external symbols that don't have a corresponding DefId,
1108 // like the compiler-generated `main` function and so on.
1109 query reachable_non_generics(_: CrateNum)
1110 -> DefIdMap<SymbolExportLevel> {
1111 storage(ArenaCacheSelector<'tcx>)
1112 desc { "looking up the exported symbols of a crate" }
1114 query is_reachable_non_generic(def_id: DefId) -> bool {
1115 desc { |tcx| "checking whether `{}` is an exported symbol", tcx.def_path_str(def_id) }
1117 query is_unreachable_local_definition(def_id: DefId) -> bool {
1119 "checking whether `{}` is reachable from outside the crate",
1120 tcx.def_path_str(def_id),
1126 /// The entire set of monomorphizations the local crate can safely link
1127 /// to because they are exported from upstream crates. Do not depend on
1128 /// this directly, as its value changes anytime a monomorphization gets
1129 /// added or removed in any upstream crate. Instead use the narrower
1130 /// `upstream_monomorphizations_for`, `upstream_drop_glue_for`, or, even
1131 /// better, `Instance::upstream_monomorphization()`.
1132 query upstream_monomorphizations(
1134 ) -> DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
1135 storage(ArenaCacheSelector<'tcx>)
1136 desc { "collecting available upstream monomorphizations `{:?}`", k }
1139 /// Returns the set of upstream monomorphizations available for the
1140 /// generic function identified by the given `def_id`. The query makes
1141 /// sure to make a stable selection if the same monomorphization is
1142 /// available in multiple upstream crates.
1144 /// You likely want to call `Instance::upstream_monomorphization()`
1145 /// instead of invoking this query directly.
1146 query upstream_monomorphizations_for(def_id: DefId)
1147 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {
1149 "collecting available upstream monomorphizations for `{}`",
1150 tcx.def_path_str(def_id),
1154 /// Returns the upstream crate that exports drop-glue for the given
1155 /// type (`substs` is expected to be a single-item list containing the
1156 /// type one wants drop-glue for).
1158 /// This is a subset of `upstream_monomorphizations_for` in order to
1159 /// increase dep-tracking granularity. Otherwise adding or removing any
1160 /// type with drop-glue in any upstream crate would invalidate all
1161 /// functions calling drop-glue of an upstream type.
1163 /// You likely want to call `Instance::upstream_monomorphization()`
1164 /// instead of invoking this query directly.
1166 /// NOTE: This query could easily be extended to also support other
1167 /// common functions that have are large set of monomorphizations
1168 /// (like `Clone::clone` for example).
1169 query upstream_drop_glue_for(substs: SubstsRef<'tcx>) -> Option<CrateNum> {
1170 desc { "available upstream drop-glue for `{:?}`", substs }
1175 query foreign_modules(_: CrateNum) -> Lrc<FxHashMap<DefId, ForeignModule>> {
1176 desc { "looking up the foreign modules of a linked crate" }
1179 /// Identifies the entry-point (e.g., the `main` function) for a given
1180 /// crate, returning `None` if there is no entry point (such as for library crates).
1181 query entry_fn(_: CrateNum) -> Option<(LocalDefId, EntryFnType)> {
1182 desc { "looking up the entry function of a crate" }
1184 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
1185 desc { "looking up the plugin registrar for a crate" }
1187 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
1188 desc { "looking up the derive registrar for a crate" }
1190 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
1192 desc { "looking up the disambiguator a crate" }
1194 query crate_hash(_: CrateNum) -> Svh {
1196 desc { "looking up the hash a crate" }
1198 query crate_host_hash(_: CrateNum) -> Option<Svh> {
1200 desc { "looking up the hash of a host version of a crate" }
1202 query original_crate_name(_: CrateNum) -> Symbol {
1204 desc { "looking up the original name a crate" }
1206 query extra_filename(_: CrateNum) -> String {
1208 desc { "looking up the extra filename for a crate" }
1210 query crate_extern_paths(_: CrateNum) -> Vec<PathBuf> {
1212 desc { "looking up the paths for extern crates" }
1217 query implementations_of_trait(_: (CrateNum, DefId))
1218 -> &'tcx [(DefId, Option<ty::fast_reject::SimplifiedType>)] {
1219 desc { "looking up implementations of a trait in a crate" }
1221 query all_trait_implementations(_: CrateNum)
1222 -> &'tcx [(DefId, Option<ty::fast_reject::SimplifiedType>)] {
1223 desc { "looking up all (?) trait implementations" }
1228 query dllimport_foreign_items(_: CrateNum)
1229 -> FxHashSet<DefId> {
1230 storage(ArenaCacheSelector<'tcx>)
1231 desc { "dllimport_foreign_items" }
1233 query is_dllimport_foreign_item(def_id: DefId) -> bool {
1234 desc { |tcx| "is_dllimport_foreign_item({})", tcx.def_path_str(def_id) }
1236 query is_statically_included_foreign_item(def_id: DefId) -> bool {
1237 desc { |tcx| "is_statically_included_foreign_item({})", tcx.def_path_str(def_id) }
1239 query native_library_kind(def_id: DefId)
1240 -> Option<NativeLibKind> {
1241 desc { |tcx| "native_library_kind({})", tcx.def_path_str(def_id) }
1246 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
1248 desc { "looking up link arguments for a crate" }
1253 /// Lifetime resolution. See `middle::resolve_lifetimes`.
1254 query resolve_lifetimes(_: CrateNum) -> ResolveLifetimes {
1255 storage(ArenaCacheSelector<'tcx>)
1256 desc { "resolving lifetimes" }
1258 query named_region_map(_: LocalDefId) ->
1259 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
1260 desc { "looking up a named region" }
1262 query is_late_bound_map(_: LocalDefId) ->
1263 Option<&'tcx FxHashSet<ItemLocalId>> {
1264 desc { "testing if a region is late bound" }
1266 query object_lifetime_defaults_map(_: LocalDefId)
1267 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
1268 desc { "looking up lifetime defaults for a region" }
1273 query visibility(def_id: DefId) -> ty::Visibility {
1275 desc { |tcx| "computing visibility of `{}`", tcx.def_path_str(def_id) }
1280 query dep_kind(_: CrateNum) -> CrateDepKind {
1282 desc { "fetching what a dependency looks like" }
1284 query crate_name(_: CrateNum) -> Symbol {
1286 desc { "fetching what a crate is named" }
1288 query item_children(def_id: DefId) -> &'tcx [Export<hir::HirId>] {
1289 desc { |tcx| "collecting child items of `{}`", tcx.def_path_str(def_id) }
1291 query extern_mod_stmt_cnum(def_id: LocalDefId) -> Option<CrateNum> {
1292 desc { |tcx| "computing crate imported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
1295 query get_lib_features(_: CrateNum) -> LibFeatures {
1296 storage(ArenaCacheSelector<'tcx>)
1298 desc { "calculating the lib features map" }
1300 query defined_lib_features(_: CrateNum)
1301 -> &'tcx [(Symbol, Option<Symbol>)] {
1302 desc { "calculating the lib features defined in a crate" }
1304 /// Returns the lang items defined in another crate by loading it from metadata.
1305 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
1306 // of that argument?
1307 query get_lang_items(_: CrateNum) -> LanguageItems {
1308 storage(ArenaCacheSelector<'tcx>)
1310 desc { "calculating the lang items map" }
1313 /// Returns all diagnostic items defined in all crates.
1314 query all_diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1315 storage(ArenaCacheSelector<'tcx>)
1317 desc { "calculating the diagnostic items map" }
1320 /// Returns the lang items defined in another crate by loading it from metadata.
1321 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
1322 desc { "calculating the lang items defined in a crate" }
1325 /// Returns the diagnostic items defined in a crate.
1326 query diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1327 storage(ArenaCacheSelector<'tcx>)
1328 desc { "calculating the diagnostic items map in a crate" }
1331 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
1332 desc { "calculating the missing lang items in a crate" }
1334 query visible_parent_map(_: CrateNum)
1335 -> DefIdMap<DefId> {
1336 storage(ArenaCacheSelector<'tcx>)
1337 desc { "calculating the visible parent map" }
1339 query trimmed_def_paths(_: CrateNum)
1340 -> FxHashMap<DefId, Symbol> {
1341 storage(ArenaCacheSelector<'tcx>)
1342 desc { "calculating trimmed def paths" }
1344 query missing_extern_crate_item(_: CrateNum) -> bool {
1346 desc { "seeing if we're missing an `extern crate` item for this crate" }
1348 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
1350 desc { "looking at the source for a crate" }
1352 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
1354 desc { "generating a postorder list of CrateNums" }
1357 query upvars_mentioned(def_id: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
1358 desc { |tcx| "collecting upvars mentioned in `{}`", tcx.def_path_str(def_id) }
1361 query maybe_unused_trait_import(def_id: LocalDefId) -> bool {
1363 desc { |tcx| "maybe_unused_trait_import for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1365 query maybe_unused_extern_crates(_: CrateNum)
1366 -> &'tcx [(LocalDefId, Span)] {
1368 desc { "looking up all possibly unused extern crates" }
1370 query names_imported_by_glob_use(def_id: LocalDefId)
1371 -> &'tcx FxHashSet<Symbol> {
1373 desc { |tcx| "names_imported_by_glob_use for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1376 query stability_index(_: CrateNum) -> stability::Index<'tcx> {
1377 storage(ArenaCacheSelector<'tcx>)
1379 desc { "calculating the stability index for the local crate" }
1381 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
1383 desc { "fetching all foreign CrateNum instances" }
1386 /// A vector of every trait accessible in the whole crate
1387 /// (i.e., including those from subcrates). This is used only for
1388 /// error reporting.
1389 query all_traits(_: CrateNum) -> &'tcx [DefId] {
1390 desc { "fetching all foreign and local traits" }
1395 /// The list of symbols exported from the given crate.
1397 /// - All names contained in `exported_symbols(cnum)` are guaranteed to
1398 /// correspond to a publicly visible symbol in `cnum` machine code.
1399 /// - The `exported_symbols` sets of different crates do not intersect.
1400 query exported_symbols(_: CrateNum)
1401 -> &'tcx [(ExportedSymbol<'tcx>, SymbolExportLevel)] {
1402 desc { "exported_symbols" }
1407 query collect_and_partition_mono_items(_: CrateNum)
1408 -> (&'tcx DefIdSet, &'tcx [CodegenUnit<'tcx>]) {
1410 desc { "collect_and_partition_mono_items" }
1412 query is_codegened_item(def_id: DefId) -> bool {
1413 desc { |tcx| "determining whether `{}` needs codegen", tcx.def_path_str(def_id) }
1415 query codegen_unit(_: Symbol) -> &'tcx CodegenUnit<'tcx> {
1416 desc { "codegen_unit" }
1418 query unused_generic_params(key: DefId) -> FiniteBitSet<u32> {
1419 cache_on_disk_if { key.is_local() }
1421 |tcx| "determining which generic parameters are unused by `{}`",
1422 tcx.def_path_str(key)
1425 query backend_optimization_level(_: CrateNum) -> OptLevel {
1426 desc { "optimization level used by backend" }
1431 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
1433 desc { "output_filenames" }
1438 /// Do not call this query directly: invoke `normalize` instead.
1439 query normalize_projection_ty(
1440 goal: CanonicalProjectionGoal<'tcx>
1442 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
1445 desc { "normalizing `{:?}`", goal }
1448 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
1449 query normalize_generic_arg_after_erasing_regions(
1450 goal: ParamEnvAnd<'tcx, GenericArg<'tcx>>
1451 ) -> GenericArg<'tcx> {
1452 desc { "normalizing `{}`", goal.value }
1455 query implied_outlives_bounds(
1456 goal: CanonicalTyGoal<'tcx>
1458 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
1461 desc { "computing implied outlives bounds for `{:?}`", goal }
1464 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
1465 query dropck_outlives(
1466 goal: CanonicalTyGoal<'tcx>
1468 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1471 desc { "computing dropck types for `{:?}`", goal }
1474 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1475 /// `infcx.predicate_must_hold()` instead.
1476 query evaluate_obligation(
1477 goal: CanonicalPredicateGoal<'tcx>
1478 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1479 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1482 query evaluate_goal(
1483 goal: traits::CanonicalChalkEnvironmentAndGoal<'tcx>
1485 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1488 desc { "evaluating trait selection obligation `{}`", goal.value }
1491 query type_implements_trait(
1492 key: (DefId, Ty<'tcx>, SubstsRef<'tcx>, ty::ParamEnv<'tcx>, )
1494 desc { "evaluating `type_implements_trait` `{:?}`", key }
1497 /// Do not call this query directly: part of the `Eq` type-op
1498 query type_op_ascribe_user_type(
1499 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1501 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1504 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1507 /// Do not call this query directly: part of the `Eq` type-op
1509 goal: CanonicalTypeOpEqGoal<'tcx>
1511 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1514 desc { "evaluating `type_op_eq` `{:?}`", goal }
1517 /// Do not call this query directly: part of the `Subtype` type-op
1518 query type_op_subtype(
1519 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1521 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1524 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1527 /// Do not call this query directly: part of the `ProvePredicate` type-op
1528 query type_op_prove_predicate(
1529 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1531 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1534 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1537 /// Do not call this query directly: part of the `Normalize` type-op
1538 query type_op_normalize_ty(
1539 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1541 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1544 desc { "normalizing `{:?}`", goal }
1547 /// Do not call this query directly: part of the `Normalize` type-op
1548 query type_op_normalize_predicate(
1549 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1551 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1554 desc { "normalizing `{:?}`", goal }
1557 /// Do not call this query directly: part of the `Normalize` type-op
1558 query type_op_normalize_poly_fn_sig(
1559 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1561 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1564 desc { "normalizing `{:?}`", goal }
1567 /// Do not call this query directly: part of the `Normalize` type-op
1568 query type_op_normalize_fn_sig(
1569 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1571 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1574 desc { "normalizing `{:?}`", goal }
1577 query subst_and_check_impossible_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1579 "impossible substituted predicates:`{}`",
1580 tcx.def_path_str(key.0)
1584 query method_autoderef_steps(
1585 goal: CanonicalTyGoal<'tcx>
1586 ) -> MethodAutoderefStepsResult<'tcx> {
1587 desc { "computing autoderef types for `{:?}`", goal }
1592 query supported_target_features(_: CrateNum) -> FxHashMap<String, Option<Symbol>> {
1593 storage(ArenaCacheSelector<'tcx>)
1595 desc { "looking up supported target features" }
1598 /// Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1599 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1601 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1604 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1606 desc { "looking up enabled feature gates" }
1609 /// Attempt to resolve the given `DefId` to an `Instance`, for the
1610 /// given generics args (`SubstsRef`), returning one of:
1611 /// * `Ok(Some(instance))` on success
1612 /// * `Ok(None)` when the `SubstsRef` are still too generic,
1613 /// and therefore don't allow finding the final `Instance`
1614 /// * `Err(ErrorReported)` when the `Instance` resolution process
1615 /// couldn't complete due to errors elsewhere - this is distinct
1616 /// from `Ok(None)` to avoid misleading diagnostics when an error
1617 /// has already been/will be emitted, for the original cause
1618 query resolve_instance(
1619 key: ty::ParamEnvAnd<'tcx, (DefId, SubstsRef<'tcx>)>
1620 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1621 desc { "resolving instance `{}`", ty::Instance::new(key.value.0, key.value.1) }
1624 query resolve_instance_of_const_arg(
1625 key: ty::ParamEnvAnd<'tcx, (LocalDefId, DefId, SubstsRef<'tcx>)>
1626 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1628 "resolving instance of the const argument `{}`",
1629 ty::Instance::new(key.value.0.to_def_id(), key.value.2),
1633 query normalize_opaque_types(key: &'tcx ty::List<ty::Predicate<'tcx>>) -> &'tcx ty::List<ty::Predicate<'tcx>> {
1634 desc { "normalizing opaque types in {:?}", key }