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.
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
134 .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 predicates that can be used for
160 /// `SelectionCandidate::ProjectionCandidate` and
161 /// `ProjectionTyCandidate::TraitDef`.
162 /// Specifically this is the bounds (equivalent to) those
163 /// written on the trait's type definition, or those
164 /// after the `impl` keyword
166 /// type X: Bound + 'lt
168 /// impl Debug + Display
171 /// `key` is the `DefId` of the associated type or opaque type.
172 query projection_predicates(key: DefId) -> &'tcx ty::List<ty::Predicate<'tcx>> {
173 desc { |tcx| "finding projection predicates for `{}`", tcx.def_path_str(key) }
176 query projection_ty_from_predicates(key: (DefId, DefId)) -> Option<ty::ProjectionTy<'tcx>> {
177 desc { |tcx| "finding projection type inside predicates of `{}`", tcx.def_path_str(key.0) }
180 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLib>> {
181 desc { "looking up the native libraries of a linked crate" }
184 query lint_levels(_: CrateNum) -> LintLevelMap {
185 storage(ArenaCacheSelector<'tcx>)
187 desc { "computing the lint levels for items in this crate" }
190 query parent_module_from_def_id(key: LocalDefId) -> LocalDefId {
192 desc { |tcx| "parent module of `{}`", tcx.def_path_str(key.to_def_id()) }
197 query is_panic_runtime(_: CrateNum) -> bool {
199 desc { "checking if the crate is_panic_runtime" }
204 /// Set of all the `DefId`s in this crate that have MIR associated with
205 /// them. This includes all the body owners, but also things like struct
207 query mir_keys(_: CrateNum) -> FxHashSet<LocalDefId> {
208 storage(ArenaCacheSelector<'tcx>)
209 desc { "getting a list of all mir_keys" }
212 /// Maps DefId's that have an associated `mir::Body` to the result
213 /// of the MIR const-checking pass. This is the set of qualifs in
214 /// the final value of a `const`.
215 query mir_const_qualif(key: DefId) -> mir::ConstQualifs {
216 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
217 cache_on_disk_if { key.is_local() }
219 query mir_const_qualif_const_arg(
220 key: (LocalDefId, DefId)
221 ) -> mir::ConstQualifs {
223 |tcx| "const checking the const argument `{}`",
224 tcx.def_path_str(key.0.to_def_id())
228 /// Fetch the MIR for a given `DefId` right after it's built - this includes
229 /// unreachable code.
230 query mir_built(key: ty::WithOptConstParam<LocalDefId>) -> &'tcx Steal<mir::Body<'tcx>> {
231 desc { |tcx| "building MIR for `{}`", tcx.def_path_str(key.did.to_def_id()) }
234 /// Fetch the MIR for a given `DefId` up till the point where it is
235 /// ready for const qualification.
237 /// See the README for the `mir` module for details.
238 query mir_const(key: ty::WithOptConstParam<LocalDefId>) -> &'tcx Steal<mir::Body<'tcx>> {
240 |tcx| "processing MIR for {}`{}`",
241 if key.const_param_did.is_some() { "the const argument " } else { "" },
242 tcx.def_path_str(key.did.to_def_id()),
247 /// Try to build an abstract representation of the given constant.
248 query mir_abstract_const(
250 ) -> Result<Option<&'tcx [mir::abstract_const::Node<'tcx>]>, ErrorReported> {
252 |tcx| "building an abstract representation for {}", tcx.def_path_str(key),
255 /// Try to build an abstract representation of the given constant.
256 query mir_abstract_const_of_const_arg(
257 key: (LocalDefId, DefId)
258 ) -> Result<Option<&'tcx [mir::abstract_const::Node<'tcx>]>, ErrorReported> {
261 "building an abstract representation for the const argument {}",
262 tcx.def_path_str(key.0.to_def_id()),
266 query try_unify_abstract_consts(key: (
267 (ty::WithOptConstParam<DefId>, SubstsRef<'tcx>),
268 (ty::WithOptConstParam<DefId>, SubstsRef<'tcx>)
271 |tcx| "trying to unify the generic constants {} and {}",
272 tcx.def_path_str(key.0.0.did), tcx.def_path_str(key.1.0.did)
276 query mir_drops_elaborated_and_const_checked(
277 key: ty::WithOptConstParam<LocalDefId>
278 ) -> &'tcx Steal<mir::Body<'tcx>> {
280 desc { |tcx| "elaborating drops for `{}`", tcx.def_path_str(key.did.to_def_id()) }
283 query mir_promoted(key: ty::WithOptConstParam<LocalDefId>) ->
285 &'tcx Steal<mir::Body<'tcx>>,
286 &'tcx Steal<IndexVec<mir::Promoted, mir::Body<'tcx>>>
290 |tcx| "processing {}`{}`",
291 if key.const_param_did.is_some() { "the const argument " } else { "" },
292 tcx.def_path_str(key.did.to_def_id()),
296 /// MIR after our optimization passes have run. This is MIR that is ready
297 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
298 query optimized_mir(key: DefId) -> &'tcx mir::Body<'tcx> {
299 desc { |tcx| "optimizing MIR for `{}`", tcx.def_path_str(key) }
300 cache_on_disk_if { key.is_local() }
302 query optimized_mir_of_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::Body<'tcx> {
304 |tcx| "optimizing MIR for the const argument `{}`",
305 tcx.def_path_str(key.0.to_def_id())
309 /// Returns coverage summary info for a function, after executing the `InstrumentCoverage`
310 /// MIR pass (assuming the -Zinstrument-coverage option is enabled).
311 query coverageinfo(key: DefId) -> mir::CoverageInfo {
312 desc { |tcx| "retrieving coverage info from MIR for `{}`", tcx.def_path_str(key) }
313 storage(ArenaCacheSelector<'tcx>)
314 cache_on_disk_if { key.is_local() }
317 /// The `DefId` is the `DefId` of the containing MIR body. Promoteds do not have their own
318 /// `DefId`. This function returns all promoteds in the specified body. The body references
319 /// promoteds by the `DefId` and the `mir::Promoted` index. This is necessary, because
320 /// after inlining a body may refer to promoteds from other bodies. In that case you still
321 /// need to use the `DefId` of the original body.
322 query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
323 desc { |tcx| "optimizing promoted MIR for `{}`", tcx.def_path_str(key) }
324 cache_on_disk_if { key.is_local() }
326 query promoted_mir_of_const_arg(
327 key: (LocalDefId, DefId)
328 ) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
330 |tcx| "optimizing promoted MIR for the const argument `{}`",
331 tcx.def_path_str(key.0.to_def_id()),
337 /// Erases regions from `ty` to yield a new type.
338 /// Normally you would just use `tcx.erase_regions(&value)`,
339 /// however, which uses this query as a kind of cache.
340 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
341 // This query is not expected to have input -- as a result, it
342 // is not a good candidates for "replay" because it is essentially a
343 // pure function of its input (and hence the expectation is that
344 // no caller would be green **apart** from just these
345 // queries). Making it anonymous avoids hashing the result, which
346 // may save a bit of time.
348 desc { "erasing regions from `{:?}`", ty }
353 query wasm_import_module_map(_: CrateNum) -> FxHashMap<DefId, String> {
354 storage(ArenaCacheSelector<'tcx>)
355 desc { "wasm import module map" }
360 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
361 /// predicates (where-clauses) directly defined on it. This is
362 /// equal to the `explicit_predicates_of` predicates plus the
363 /// `inferred_outlives_of` predicates.
364 query predicates_defined_on(key: DefId) -> ty::GenericPredicates<'tcx> {
365 desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
368 /// Returns the predicates written explicitly by the user.
369 query explicit_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
370 desc { |tcx| "computing explicit predicates of `{}`", tcx.def_path_str(key) }
373 /// Returns the inferred outlives predicates (e.g., for `struct
374 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
375 query inferred_outlives_of(key: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {
376 desc { |tcx| "computing inferred outlives predicates of `{}`", tcx.def_path_str(key) }
379 /// Maps from the `DefId` of a trait to the list of
380 /// super-predicates. This is a subset of the full list of
381 /// predicates. We store these in a separate map because we must
382 /// evaluate them even during type conversion, often before the
383 /// full predicates are available (note that supertraits have
384 /// additional acyclicity requirements).
385 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
386 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
389 /// To avoid cycles within the predicates of a single item we compute
390 /// per-type-parameter predicates for resolving `T::AssocTy`.
391 query type_param_predicates(key: (DefId, LocalDefId)) -> ty::GenericPredicates<'tcx> {
392 desc { |tcx| "computing the bounds for type parameter `{}`", {
393 let id = tcx.hir().local_def_id_to_hir_id(key.1);
394 tcx.hir().ty_param_name(id)
398 query trait_def(key: DefId) -> ty::TraitDef {
399 desc { |tcx| "computing trait definition for `{}`", tcx.def_path_str(key) }
400 storage(ArenaCacheSelector<'tcx>)
402 query adt_def(key: DefId) -> &'tcx ty::AdtDef {
403 desc { |tcx| "computing ADT definition for `{}`", tcx.def_path_str(key) }
405 query adt_destructor(key: DefId) -> Option<ty::Destructor> {
406 desc { |tcx| "computing `Drop` impl for `{}`", tcx.def_path_str(key) }
409 // The cycle error here should be reported as an error by `check_representable`.
410 // We consider the type as Sized in the meanwhile to avoid
411 // further errors (done in impl Value for AdtSizedConstraint).
412 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
413 // in case we accidentally otherwise don't emit an error.
414 query adt_sized_constraint(
416 ) -> AdtSizedConstraint<'tcx> {
417 desc { |tcx| "computing `Sized` constraints for `{}`", tcx.def_path_str(key) }
421 query adt_dtorck_constraint(
423 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {
424 desc { |tcx| "computing drop-check constraints for `{}`", tcx.def_path_str(key) }
427 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
428 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
429 /// not have the feature gate active).
431 /// **Do not call this function manually.** It is only meant to cache the base data for the
432 /// `is_const_fn` function.
433 query is_const_fn_raw(key: DefId) -> bool {
434 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
437 /// Returns `true` if this is a const `impl`. **Do not call this function manually.**
439 /// This query caches the base data for the `is_const_impl` helper function, which also
440 /// takes into account stability attributes (e.g., `#[rustc_const_unstable]`).
441 query is_const_impl_raw(key: DefId) -> bool {
442 desc { |tcx| "checking if item is const impl: `{}`", tcx.def_path_str(key) }
445 query asyncness(key: DefId) -> hir::IsAsync {
446 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
449 /// Returns `true` if calls to the function may be promoted.
451 /// This is either because the function is e.g., a tuple-struct or tuple-variant
452 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
453 /// be removed in the future in favour of some form of check which figures out whether the
454 /// function does not inspect the bits of any of its arguments (so is essentially just a
455 /// constructor function).
456 query is_promotable_const_fn(key: DefId) -> bool {
457 desc { |tcx| "checking if item is promotable: `{}`", tcx.def_path_str(key) }
460 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
461 query is_foreign_item(key: DefId) -> bool {
462 desc { |tcx| "checking if `{}` is a foreign item", tcx.def_path_str(key) }
465 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
466 query static_mutability(def_id: DefId) -> Option<hir::Mutability> {
467 desc { |tcx| "looking up static mutability of `{}`", tcx.def_path_str(def_id) }
470 /// Returns `Some(generator_kind)` if the node pointed to by `def_id` is a generator.
471 query generator_kind(def_id: DefId) -> Option<hir::GeneratorKind> {
472 desc { |tcx| "looking up generator kind of `{}`", tcx.def_path_str(def_id) }
475 /// Gets a map with the variance of every item; use `item_variance` instead.
476 query crate_variances(_: CrateNum) -> ty::CrateVariancesMap<'tcx> {
477 storage(ArenaCacheSelector<'tcx>)
478 desc { "computing the variances for items in this crate" }
481 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
482 query variances_of(def_id: DefId) -> &'tcx [ty::Variance] {
483 desc { |tcx| "computing the variances of `{}`", tcx.def_path_str(def_id) }
488 /// Maps from thee `DefId` of a type to its (inferred) outlives.
489 query inferred_outlives_crate(_: CrateNum)
490 -> ty::CratePredicatesMap<'tcx> {
491 storage(ArenaCacheSelector<'tcx>)
492 desc { "computing the inferred outlives predicates for items in this crate" }
497 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
498 query associated_item_def_ids(key: DefId) -> &'tcx [DefId] {
499 desc { |tcx| "collecting associated items of `{}`", tcx.def_path_str(key) }
502 /// Maps from a trait item to the trait item "descriptor".
503 query associated_item(key: DefId) -> ty::AssocItem {
504 desc { |tcx| "computing associated item data for `{}`", tcx.def_path_str(key) }
505 storage(ArenaCacheSelector<'tcx>)
508 /// Collects the associated items defined on a trait or impl.
509 query associated_items(key: DefId) -> ty::AssociatedItems<'tcx> {
510 storage(ArenaCacheSelector<'tcx>)
511 desc { |tcx| "collecting associated items of {}", tcx.def_path_str(key) }
514 query impl_trait_ref(key: DefId) -> Option<ty::TraitRef<'tcx>> {
515 desc { |tcx| "computing trait implemented by `{}`", tcx.def_path_str(key) }
517 query impl_polarity(key: DefId) -> ty::ImplPolarity {
518 desc { |tcx| "computing implementation polarity of `{}`", tcx.def_path_str(key) }
521 query issue33140_self_ty(key: DefId) -> Option<ty::Ty<'tcx>> {
522 desc { |tcx| "computing Self type wrt issue #33140 `{}`", tcx.def_path_str(key) }
527 /// Maps a `DefId` of a type to a list of its inherent impls.
528 /// Contains implementations of methods that are inherent to a type.
529 /// Methods in these implementations don't need to be exported.
530 query inherent_impls(key: DefId) -> &'tcx [DefId] {
531 desc { |tcx| "collecting inherent impls for `{}`", tcx.def_path_str(key) }
537 /// The result of unsafety-checking this `LocalDefId`.
538 query unsafety_check_result(key: LocalDefId) -> &'tcx mir::UnsafetyCheckResult {
539 desc { |tcx| "unsafety-checking `{}`", tcx.def_path_str(key.to_def_id()) }
540 cache_on_disk_if { true }
542 query unsafety_check_result_for_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::UnsafetyCheckResult {
544 |tcx| "unsafety-checking the const argument `{}`",
545 tcx.def_path_str(key.0.to_def_id())
549 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error.
551 /// Unsafety checking is executed for each method separately, but we only want
552 /// to emit this error once per derive. As there are some impls with multiple
553 /// methods, we use a query for deduplication.
554 query unsafe_derive_on_repr_packed(key: LocalDefId) -> () {
555 desc { |tcx| "processing `{}`", tcx.def_path_str(key.to_def_id()) }
558 /// The signature of functions.
559 query fn_sig(key: DefId) -> ty::PolyFnSig<'tcx> {
560 desc { |tcx| "computing function signature of `{}`", tcx.def_path_str(key) }
565 query lint_mod(key: LocalDefId) -> () {
566 desc { |tcx| "linting {}", describe_as_module(key, tcx) }
569 /// Checks the attributes in the module.
570 query check_mod_attrs(key: LocalDefId) -> () {
571 desc { |tcx| "checking attributes in {}", describe_as_module(key, tcx) }
574 query check_mod_unstable_api_usage(key: LocalDefId) -> () {
575 desc { |tcx| "checking for unstable API usage in {}", describe_as_module(key, tcx) }
578 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
579 query check_mod_const_bodies(key: LocalDefId) -> () {
580 desc { |tcx| "checking consts in {}", describe_as_module(key, tcx) }
583 /// Checks the loops in the module.
584 query check_mod_loops(key: LocalDefId) -> () {
585 desc { |tcx| "checking loops in {}", describe_as_module(key, tcx) }
588 query check_mod_item_types(key: LocalDefId) -> () {
589 desc { |tcx| "checking item types in {}", describe_as_module(key, tcx) }
592 query check_mod_privacy(key: LocalDefId) -> () {
593 desc { |tcx| "checking privacy in {}", describe_as_module(key, tcx) }
596 query check_mod_intrinsics(key: LocalDefId) -> () {
597 desc { |tcx| "checking intrinsics in {}", describe_as_module(key, tcx) }
600 query check_mod_liveness(key: LocalDefId) -> () {
601 desc { |tcx| "checking liveness of variables in {}", describe_as_module(key, tcx) }
604 query check_mod_impl_wf(key: LocalDefId) -> () {
605 desc { |tcx| "checking that impls are well-formed in {}", describe_as_module(key, tcx) }
608 query collect_mod_item_types(key: LocalDefId) -> () {
609 desc { |tcx| "collecting item types in {}", describe_as_module(key, tcx) }
612 /// Caches `CoerceUnsized` kinds for impls on custom types.
613 query coerce_unsized_info(key: DefId)
614 -> ty::adjustment::CoerceUnsizedInfo {
615 desc { |tcx| "computing CoerceUnsized info for `{}`", tcx.def_path_str(key) }
620 query typeck_item_bodies(_: CrateNum) -> () {
621 desc { "type-checking all item bodies" }
624 query typeck(key: LocalDefId) -> &'tcx ty::TypeckResults<'tcx> {
625 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
626 cache_on_disk_if { true }
628 query typeck_const_arg(
629 key: (LocalDefId, DefId)
630 ) -> &'tcx ty::TypeckResults<'tcx> {
632 |tcx| "type-checking the const argument `{}`",
633 tcx.def_path_str(key.0.to_def_id()),
636 query diagnostic_only_typeck(key: LocalDefId) -> &'tcx ty::TypeckResults<'tcx> {
637 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
638 cache_on_disk_if { true }
639 load_cached(tcx, id) {
640 let typeck_results: Option<ty::TypeckResults<'tcx>> = tcx
641 .queries.on_disk_cache
642 .try_load_query_result(tcx, id);
644 typeck_results.map(|x| &*tcx.arena.alloc(x))
650 query used_trait_imports(key: LocalDefId) -> &'tcx FxHashSet<LocalDefId> {
651 desc { |tcx| "used_trait_imports `{}`", tcx.def_path_str(key.to_def_id()) }
652 cache_on_disk_if { true }
657 query has_typeck_results(def_id: DefId) -> bool {
658 desc { |tcx| "checking whether `{}` has a body", tcx.def_path_str(def_id) }
661 query coherent_trait(def_id: DefId) -> () {
662 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
667 /// Borrow-checks the function body. If this is a closure, returns
668 /// additional requirements that the closure's creator must verify.
669 query mir_borrowck(key: LocalDefId) -> &'tcx mir::BorrowCheckResult<'tcx> {
670 desc { |tcx| "borrow-checking `{}`", tcx.def_path_str(key.to_def_id()) }
671 cache_on_disk_if(tcx, opt_result) {
672 tcx.is_closure(key.to_def_id())
673 || opt_result.map_or(false, |r| !r.concrete_opaque_types.is_empty())
676 query mir_borrowck_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::BorrowCheckResult<'tcx> {
678 |tcx| "borrow-checking the const argument`{}`",
679 tcx.def_path_str(key.0.to_def_id())
685 /// Gets a complete map from all types to their inherent impls.
686 /// Not meant to be used directly outside of coherence.
687 /// (Defined only for `LOCAL_CRATE`.)
688 query crate_inherent_impls(k: CrateNum)
689 -> CrateInherentImpls {
690 storage(ArenaCacheSelector<'tcx>)
692 desc { "all inherent impls defined in crate `{:?}`", k }
695 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
696 /// Not meant to be used directly outside of coherence.
697 /// (Defined only for `LOCAL_CRATE`.)
698 query crate_inherent_impls_overlap_check(_: CrateNum)
701 desc { "check for overlap between inherent impls defined in this crate" }
706 /// Evaluates a constant and returns the computed allocation.
708 /// **Do not use this** directly, use the `tcx.eval_static_initializer` wrapper.
709 query eval_to_allocation_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
710 -> EvalToAllocationRawResult<'tcx> {
712 "const-evaluating + checking `{}`",
713 key.value.display(tcx)
715 cache_on_disk_if { true }
718 /// Evaluates const items or anonymous constants
719 /// (such as enum variant explicit discriminants or array lengths)
720 /// into a representation suitable for the type system and const generics.
722 /// **Do not use this** directly, use one of the following wrappers: `tcx.const_eval_poly`,
723 /// `tcx.const_eval_resolve`, `tcx.const_eval_instance`, or `tcx.const_eval_global_id`.
724 query eval_to_const_value_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
725 -> EvalToConstValueResult<'tcx> {
727 "simplifying constant for the type system `{}`",
728 key.value.display(tcx)
730 cache_on_disk_if { true }
733 /// Destructure a constant ADT or array into its variant index and its
735 query destructure_const(
736 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
737 ) -> mir::DestructuredConst<'tcx> {
738 desc { "destructure constant" }
741 /// Dereference a constant reference or raw pointer and turn the result into a constant
744 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
745 ) -> &'tcx ty::Const<'tcx> {
746 desc { "deref constant" }
749 query const_caller_location(key: (rustc_span::Symbol, u32, u32)) -> ConstValue<'tcx> {
750 desc { "get a &core::panic::Location referring to a span" }
754 key: LitToConstInput<'tcx>
755 ) -> Result<&'tcx ty::Const<'tcx>, LitToConstError> {
756 desc { "converting literal to const" }
761 query check_match(key: DefId) {
762 desc { |tcx| "match-checking `{}`", tcx.def_path_str(key) }
763 cache_on_disk_if { key.is_local() }
766 /// Performs part of the privacy check and computes "access levels".
767 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
769 desc { "privacy access levels" }
771 query check_private_in_public(_: CrateNum) -> () {
773 desc { "checking for private elements in public interfaces" }
778 query reachable_set(_: CrateNum) -> FxHashSet<LocalDefId> {
779 storage(ArenaCacheSelector<'tcx>)
780 desc { "reachability" }
783 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
784 /// in the case of closures, this will be redirected to the enclosing function.
785 query region_scope_tree(def_id: DefId) -> &'tcx region::ScopeTree {
786 desc { |tcx| "computing drop scopes for `{}`", tcx.def_path_str(def_id) }
789 query mir_shims(key: ty::InstanceDef<'tcx>) -> mir::Body<'tcx> {
790 storage(ArenaCacheSelector<'tcx>)
791 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
794 /// The `symbol_name` query provides the symbol name for calling a
795 /// given instance from the local crate. In particular, it will also
796 /// look up the correct symbol name of instances from upstream crates.
797 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName<'tcx> {
798 desc { "computing the symbol for `{}`", key }
799 cache_on_disk_if { true }
802 query def_kind(def_id: DefId) -> DefKind {
803 desc { |tcx| "looking up definition kind of `{}`", tcx.def_path_str(def_id) }
805 query def_span(def_id: DefId) -> Span {
806 desc { |tcx| "looking up span for `{}`", tcx.def_path_str(def_id) }
807 // FIXME(mw): DefSpans are not really inputs since they are derived from
808 // HIR. But at the moment HIR hashing still contains some hacks that allow
809 // to make type debuginfo to be source location independent. Declaring
810 // DefSpan an input makes sure that changes to these are always detected
811 // regardless of HIR hashing.
814 query lookup_stability(def_id: DefId) -> Option<&'tcx attr::Stability> {
815 desc { |tcx| "looking up stability of `{}`", tcx.def_path_str(def_id) }
817 query lookup_const_stability(def_id: DefId) -> Option<&'tcx attr::ConstStability> {
818 desc { |tcx| "looking up const stability of `{}`", tcx.def_path_str(def_id) }
820 query lookup_deprecation_entry(def_id: DefId) -> Option<DeprecationEntry> {
821 desc { |tcx| "checking whether `{}` is deprecated", tcx.def_path_str(def_id) }
823 query item_attrs(def_id: DefId) -> &'tcx [ast::Attribute] {
824 desc { |tcx| "collecting attributes of `{}`", tcx.def_path_str(def_id) }
829 query codegen_fn_attrs(def_id: DefId) -> CodegenFnAttrs {
830 desc { |tcx| "computing codegen attributes of `{}`", tcx.def_path_str(def_id) }
831 storage(ArenaCacheSelector<'tcx>)
832 cache_on_disk_if { true }
837 query fn_arg_names(def_id: DefId) -> &'tcx [rustc_span::symbol::Ident] {
838 desc { |tcx| "looking up function parameter names for `{}`", tcx.def_path_str(def_id) }
840 /// Gets the rendered value of the specified constant or associated constant.
842 query rendered_const(def_id: DefId) -> String {
843 desc { |tcx| "rendering constant intializer of `{}`", tcx.def_path_str(def_id) }
845 query impl_parent(def_id: DefId) -> Option<DefId> {
846 desc { |tcx| "computing specialization parent impl of `{}`", tcx.def_path_str(def_id) }
851 query trait_of_item(def_id: DefId) -> Option<DefId> {
852 desc { |tcx| "finding trait defining `{}`", tcx.def_path_str(def_id) }
857 query is_mir_available(key: DefId) -> bool {
858 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
863 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
864 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
865 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
870 query codegen_fulfill_obligation(
871 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
872 ) -> Result<ImplSource<'tcx, ()>, ErrorReported> {
873 cache_on_disk_if { true }
875 "checking if `{}` fulfills its obligations",
876 tcx.def_path_str(key.1.def_id())
882 query all_local_trait_impls(key: CrateNum) -> &'tcx BTreeMap<DefId, Vec<hir::HirId>> {
883 desc { "local trait impls" }
885 query trait_impls_of(key: DefId) -> ty::trait_def::TraitImpls {
886 storage(ArenaCacheSelector<'tcx>)
887 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
889 query specialization_graph_of(key: DefId) -> specialization_graph::Graph {
890 storage(ArenaCacheSelector<'tcx>)
891 desc { |tcx| "building specialization graph of trait `{}`", tcx.def_path_str(key) }
892 cache_on_disk_if { true }
894 query object_safety_violations(key: DefId) -> &'tcx [traits::ObjectSafetyViolation] {
895 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
898 /// Gets the ParameterEnvironment for a given item; this environment
899 /// will be in "user-facing" mode, meaning that it is suitable for
900 /// type-checking etc, and it does not normalize specializable
901 /// associated types. This is almost always what you want,
902 /// unless you are doing MIR optimizations, in which case you
903 query param_env(def_id: DefId) -> ty::ParamEnv<'tcx> {
904 desc { |tcx| "computing normalized predicates of `{}`", tcx.def_path_str(def_id) }
907 /// Like `param_env`, but returns the `ParamEnv in `Reveal::All` mode.
908 /// Prefer this over `tcx.param_env(def_id).with_reveal_all_normalized(tcx)`,
909 /// as this method is more efficient.
910 query param_env_reveal_all_normalized(def_id: DefId) -> ty::ParamEnv<'tcx> {
911 desc { |tcx| "computing revealed normalized predicates of `{}`", tcx.def_path_str(def_id) }
914 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
915 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
916 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
917 desc { "computing whether `{}` is `Copy`", env.value }
919 /// Query backing `TyS::is_sized`.
920 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
921 desc { "computing whether `{}` is `Sized`", env.value }
923 /// Query backing `TyS::is_freeze`.
924 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
925 desc { "computing whether `{}` is freeze", env.value }
927 /// Query backing `TyS::needs_drop`.
928 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
929 desc { "computing whether `{}` needs drop", env.value }
932 /// Query backing `TyS::is_structural_eq_shallow`.
934 /// This is only correct for ADTs. Call `is_structural_eq_shallow` to handle all types
936 query has_structural_eq_impls(ty: Ty<'tcx>) -> bool {
938 "computing whether `{:?}` implements `PartialStructuralEq` and `StructuralEq`",
943 /// A list of types where the ADT requires drop if and only if any of
944 /// those types require drop. If the ADT is known to always need drop
945 /// then `Err(AlwaysRequiresDrop)` is returned.
946 query adt_drop_tys(def_id: DefId) -> Result<&'tcx ty::List<Ty<'tcx>>, AlwaysRequiresDrop> {
947 desc { |tcx| "computing when `{}` needs drop", tcx.def_path_str(def_id) }
948 cache_on_disk_if { true }
952 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
953 ) -> Result<&'tcx rustc_target::abi::Layout, ty::layout::LayoutError<'tcx>> {
954 desc { "computing layout of `{}`", env.value }
959 query dylib_dependency_formats(_: CrateNum)
960 -> &'tcx [(CrateNum, LinkagePreference)] {
961 desc { "dylib dependency formats of crate" }
964 query dependency_formats(_: CrateNum)
965 -> Lrc<crate::middle::dependency_format::Dependencies>
967 desc { "get the linkage format of all dependencies" }
972 query is_compiler_builtins(_: CrateNum) -> bool {
974 desc { "checking if the crate is_compiler_builtins" }
976 query has_global_allocator(_: CrateNum) -> bool {
978 desc { "checking if the crate has_global_allocator" }
980 query has_panic_handler(_: CrateNum) -> bool {
982 desc { "checking if the crate has_panic_handler" }
984 query is_profiler_runtime(_: CrateNum) -> bool {
986 desc { "query a crate is `#![profiler_runtime]`" }
988 query panic_strategy(_: CrateNum) -> PanicStrategy {
990 desc { "query a crate's configured panic strategy" }
992 query is_no_builtins(_: CrateNum) -> bool {
994 desc { "test whether a crate has `#![no_builtins]`" }
996 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
998 desc { "query a crate's symbol mangling version" }
1001 query extern_crate(def_id: DefId) -> Option<&'tcx ExternCrate> {
1003 desc { "getting crate's ExternCrateData" }
1008 query specializes(_: (DefId, DefId)) -> bool {
1009 desc { "computing whether impls specialize one another" }
1011 query in_scope_traits_map(_: LocalDefId)
1012 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
1014 desc { "traits in scope at a block" }
1019 query module_exports(def_id: LocalDefId) -> Option<&'tcx [Export<LocalDefId>]> {
1020 desc { |tcx| "looking up items exported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
1026 query impl_defaultness(def_id: DefId) -> hir::Defaultness {
1027 desc { |tcx| "looking up whether `{}` is a default impl", tcx.def_path_str(def_id) }
1030 query check_item_well_formed(key: LocalDefId) -> () {
1031 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1033 query check_trait_item_well_formed(key: LocalDefId) -> () {
1034 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1036 query check_impl_item_well_formed(key: LocalDefId) -> () {
1037 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1043 // The `DefId`s of all non-generic functions and statics in the given crate
1044 // that can be reached from outside the crate.
1046 // We expect this items to be available for being linked to.
1048 // This query can also be called for `LOCAL_CRATE`. In this case it will
1049 // compute which items will be reachable to other crates, taking into account
1050 // the kind of crate that is currently compiled. Crates with only a
1051 // C interface have fewer reachable things.
1053 // Does not include external symbols that don't have a corresponding DefId,
1054 // like the compiler-generated `main` function and so on.
1055 query reachable_non_generics(_: CrateNum)
1056 -> DefIdMap<SymbolExportLevel> {
1057 storage(ArenaCacheSelector<'tcx>)
1058 desc { "looking up the exported symbols of a crate" }
1060 query is_reachable_non_generic(def_id: DefId) -> bool {
1061 desc { |tcx| "checking whether `{}` is an exported symbol", tcx.def_path_str(def_id) }
1063 query is_unreachable_local_definition(def_id: DefId) -> bool {
1065 "checking whether `{}` is reachable from outside the crate",
1066 tcx.def_path_str(def_id),
1072 /// The entire set of monomorphizations the local crate can safely link
1073 /// to because they are exported from upstream crates. Do not depend on
1074 /// this directly, as its value changes anytime a monomorphization gets
1075 /// added or removed in any upstream crate. Instead use the narrower
1076 /// `upstream_monomorphizations_for`, `upstream_drop_glue_for`, or, even
1077 /// better, `Instance::upstream_monomorphization()`.
1078 query upstream_monomorphizations(
1080 ) -> DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
1081 storage(ArenaCacheSelector<'tcx>)
1082 desc { "collecting available upstream monomorphizations `{:?}`", k }
1085 /// Returns the set of upstream monomorphizations available for the
1086 /// generic function identified by the given `def_id`. The query makes
1087 /// sure to make a stable selection if the same monomorphization is
1088 /// available in multiple upstream crates.
1090 /// You likely want to call `Instance::upstream_monomorphization()`
1091 /// instead of invoking this query directly.
1092 query upstream_monomorphizations_for(def_id: DefId)
1093 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {
1095 "collecting available upstream monomorphizations for `{}`",
1096 tcx.def_path_str(def_id),
1100 /// Returns the upstream crate that exports drop-glue for the given
1101 /// type (`substs` is expected to be a single-item list containing the
1102 /// type one wants drop-glue for).
1104 /// This is a subset of `upstream_monomorphizations_for` in order to
1105 /// increase dep-tracking granularity. Otherwise adding or removing any
1106 /// type with drop-glue in any upstream crate would invalidate all
1107 /// functions calling drop-glue of an upstream type.
1109 /// You likely want to call `Instance::upstream_monomorphization()`
1110 /// instead of invoking this query directly.
1112 /// NOTE: This query could easily be extended to also support other
1113 /// common functions that have are large set of monomorphizations
1114 /// (like `Clone::clone` for example).
1115 query upstream_drop_glue_for(substs: SubstsRef<'tcx>) -> Option<CrateNum> {
1116 desc { "available upstream drop-glue for `{:?}`", substs }
1121 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
1122 desc { "looking up the foreign modules of a linked crate" }
1125 /// Identifies the entry-point (e.g., the `main` function) for a given
1126 /// crate, returning `None` if there is no entry point (such as for library crates).
1127 query entry_fn(_: CrateNum) -> Option<(LocalDefId, EntryFnType)> {
1128 desc { "looking up the entry function of a crate" }
1130 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
1131 desc { "looking up the plugin registrar for a crate" }
1133 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
1134 desc { "looking up the derive registrar for a crate" }
1136 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
1138 desc { "looking up the disambiguator a crate" }
1140 query crate_hash(_: CrateNum) -> Svh {
1142 desc { "looking up the hash a crate" }
1144 query crate_host_hash(_: CrateNum) -> Option<Svh> {
1146 desc { "looking up the hash of a host version of a crate" }
1148 query original_crate_name(_: CrateNum) -> Symbol {
1150 desc { "looking up the original name a crate" }
1152 query extra_filename(_: CrateNum) -> String {
1154 desc { "looking up the extra filename for a crate" }
1156 query crate_extern_paths(_: CrateNum) -> Vec<PathBuf> {
1158 desc { "looking up the paths for extern crates" }
1163 query implementations_of_trait(_: (CrateNum, DefId))
1164 -> &'tcx [(DefId, Option<ty::fast_reject::SimplifiedType>)] {
1165 desc { "looking up implementations of a trait in a crate" }
1167 query all_trait_implementations(_: CrateNum)
1168 -> &'tcx [(DefId, Option<ty::fast_reject::SimplifiedType>)] {
1169 desc { "looking up all (?) trait implementations" }
1174 query dllimport_foreign_items(_: CrateNum)
1175 -> FxHashSet<DefId> {
1176 storage(ArenaCacheSelector<'tcx>)
1177 desc { "dllimport_foreign_items" }
1179 query is_dllimport_foreign_item(def_id: DefId) -> bool {
1180 desc { |tcx| "is_dllimport_foreign_item({})", tcx.def_path_str(def_id) }
1182 query is_statically_included_foreign_item(def_id: DefId) -> bool {
1183 desc { |tcx| "is_statically_included_foreign_item({})", tcx.def_path_str(def_id) }
1185 query native_library_kind(def_id: DefId)
1186 -> Option<NativeLibKind> {
1187 desc { |tcx| "native_library_kind({})", tcx.def_path_str(def_id) }
1192 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
1194 desc { "looking up link arguments for a crate" }
1199 /// Lifetime resolution. See `middle::resolve_lifetimes`.
1200 query resolve_lifetimes(_: CrateNum) -> ResolveLifetimes {
1201 storage(ArenaCacheSelector<'tcx>)
1202 desc { "resolving lifetimes" }
1204 query named_region_map(_: LocalDefId) ->
1205 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
1206 desc { "looking up a named region" }
1208 query is_late_bound_map(_: LocalDefId) ->
1209 Option<&'tcx FxHashSet<ItemLocalId>> {
1210 desc { "testing if a region is late bound" }
1212 query object_lifetime_defaults_map(_: LocalDefId)
1213 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
1214 desc { "looking up lifetime defaults for a region" }
1219 query visibility(def_id: DefId) -> ty::Visibility {
1220 desc { |tcx| "computing visibility of `{}`", tcx.def_path_str(def_id) }
1225 query dep_kind(_: CrateNum) -> CrateDepKind {
1227 desc { "fetching what a dependency looks like" }
1229 query crate_name(_: CrateNum) -> Symbol {
1231 desc { "fetching what a crate is named" }
1233 query item_children(def_id: DefId) -> &'tcx [Export<hir::HirId>] {
1234 desc { |tcx| "collecting child items of `{}`", tcx.def_path_str(def_id) }
1236 query extern_mod_stmt_cnum(def_id: LocalDefId) -> Option<CrateNum> {
1237 desc { |tcx| "computing crate imported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
1240 query get_lib_features(_: CrateNum) -> LibFeatures {
1241 storage(ArenaCacheSelector<'tcx>)
1243 desc { "calculating the lib features map" }
1245 query defined_lib_features(_: CrateNum)
1246 -> &'tcx [(Symbol, Option<Symbol>)] {
1247 desc { "calculating the lib features defined in a crate" }
1249 /// Returns the lang items defined in another crate by loading it from metadata.
1250 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
1251 // of that argument?
1252 query get_lang_items(_: CrateNum) -> LanguageItems {
1253 storage(ArenaCacheSelector<'tcx>)
1255 desc { "calculating the lang items map" }
1258 /// Returns all diagnostic items defined in all crates.
1259 query all_diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1260 storage(ArenaCacheSelector<'tcx>)
1262 desc { "calculating the diagnostic items map" }
1265 /// Returns the lang items defined in another crate by loading it from metadata.
1266 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
1267 desc { "calculating the lang items defined in a crate" }
1270 /// Returns the diagnostic items defined in a crate.
1271 query diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1272 storage(ArenaCacheSelector<'tcx>)
1273 desc { "calculating the diagnostic items map in a crate" }
1276 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
1277 desc { "calculating the missing lang items in a crate" }
1279 query visible_parent_map(_: CrateNum)
1280 -> DefIdMap<DefId> {
1281 storage(ArenaCacheSelector<'tcx>)
1282 desc { "calculating the visible parent map" }
1284 query trimmed_def_paths(_: CrateNum)
1285 -> FxHashMap<DefId, Symbol> {
1286 storage(ArenaCacheSelector<'tcx>)
1287 desc { "calculating trimmed def paths" }
1289 query missing_extern_crate_item(_: CrateNum) -> bool {
1291 desc { "seeing if we're missing an `extern crate` item for this crate" }
1293 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
1295 desc { "looking at the source for a crate" }
1297 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
1299 desc { "generating a postorder list of CrateNums" }
1302 query upvars_mentioned(def_id: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
1303 desc { |tcx| "collecting upvars mentioned in `{}`", tcx.def_path_str(def_id) }
1306 query maybe_unused_trait_import(def_id: LocalDefId) -> bool {
1308 desc { |tcx| "maybe_unused_trait_import for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1310 query maybe_unused_extern_crates(_: CrateNum)
1311 -> &'tcx [(LocalDefId, Span)] {
1313 desc { "looking up all possibly unused extern crates" }
1315 query names_imported_by_glob_use(def_id: LocalDefId)
1316 -> &'tcx FxHashSet<Symbol> {
1318 desc { |tcx| "names_imported_by_glob_use for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1321 query stability_index(_: CrateNum) -> stability::Index<'tcx> {
1322 storage(ArenaCacheSelector<'tcx>)
1324 desc { "calculating the stability index for the local crate" }
1326 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
1328 desc { "fetching all foreign CrateNum instances" }
1331 /// A vector of every trait accessible in the whole crate
1332 /// (i.e., including those from subcrates). This is used only for
1333 /// error reporting.
1334 query all_traits(_: CrateNum) -> &'tcx [DefId] {
1335 desc { "fetching all foreign and local traits" }
1340 /// The list of symbols exported from the given crate.
1342 /// - All names contained in `exported_symbols(cnum)` are guaranteed to
1343 /// correspond to a publicly visible symbol in `cnum` machine code.
1344 /// - The `exported_symbols` sets of different crates do not intersect.
1345 query exported_symbols(_: CrateNum)
1346 -> &'tcx [(ExportedSymbol<'tcx>, SymbolExportLevel)] {
1347 desc { "exported_symbols" }
1352 query collect_and_partition_mono_items(_: CrateNum)
1353 -> (&'tcx DefIdSet, &'tcx [CodegenUnit<'tcx>]) {
1355 desc { "collect_and_partition_mono_items" }
1357 query is_codegened_item(def_id: DefId) -> bool {
1358 desc { |tcx| "determining whether `{}` needs codegen", tcx.def_path_str(def_id) }
1360 query codegen_unit(_: Symbol) -> &'tcx CodegenUnit<'tcx> {
1361 desc { "codegen_unit" }
1363 query unused_generic_params(key: DefId) -> FiniteBitSet<u32> {
1364 cache_on_disk_if { key.is_local() }
1366 |tcx| "determining which generic parameters are unused by `{}`",
1367 tcx.def_path_str(key)
1370 query backend_optimization_level(_: CrateNum) -> OptLevel {
1371 desc { "optimization level used by backend" }
1376 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
1378 desc { "output_filenames" }
1383 /// Do not call this query directly: invoke `normalize` instead.
1384 query normalize_projection_ty(
1385 goal: CanonicalProjectionGoal<'tcx>
1387 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
1390 desc { "normalizing `{:?}`", goal }
1393 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
1394 query normalize_generic_arg_after_erasing_regions(
1395 goal: ParamEnvAnd<'tcx, GenericArg<'tcx>>
1396 ) -> GenericArg<'tcx> {
1397 desc { "normalizing `{}`", goal.value }
1400 query implied_outlives_bounds(
1401 goal: CanonicalTyGoal<'tcx>
1403 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
1406 desc { "computing implied outlives bounds for `{:?}`", goal }
1409 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
1410 query dropck_outlives(
1411 goal: CanonicalTyGoal<'tcx>
1413 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1416 desc { "computing dropck types for `{:?}`", goal }
1419 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1420 /// `infcx.predicate_must_hold()` instead.
1421 query evaluate_obligation(
1422 goal: CanonicalPredicateGoal<'tcx>
1423 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1424 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1427 query evaluate_goal(
1428 goal: traits::CanonicalChalkEnvironmentAndGoal<'tcx>
1430 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1433 desc { "evaluating trait selection obligation `{}`", goal.value }
1436 query type_implements_trait(
1437 key: (DefId, Ty<'tcx>, SubstsRef<'tcx>, ty::ParamEnv<'tcx>, )
1439 desc { "evaluating `type_implements_trait` `{:?}`", key }
1442 /// Do not call this query directly: part of the `Eq` type-op
1443 query type_op_ascribe_user_type(
1444 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1446 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1449 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1452 /// Do not call this query directly: part of the `Eq` type-op
1454 goal: CanonicalTypeOpEqGoal<'tcx>
1456 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1459 desc { "evaluating `type_op_eq` `{:?}`", goal }
1462 /// Do not call this query directly: part of the `Subtype` type-op
1463 query type_op_subtype(
1464 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1466 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1469 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1472 /// Do not call this query directly: part of the `ProvePredicate` type-op
1473 query type_op_prove_predicate(
1474 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1476 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1479 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1482 /// Do not call this query directly: part of the `Normalize` type-op
1483 query type_op_normalize_ty(
1484 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1486 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1489 desc { "normalizing `{:?}`", goal }
1492 /// Do not call this query directly: part of the `Normalize` type-op
1493 query type_op_normalize_predicate(
1494 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1496 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1499 desc { "normalizing `{:?}`", goal }
1502 /// Do not call this query directly: part of the `Normalize` type-op
1503 query type_op_normalize_poly_fn_sig(
1504 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1506 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1509 desc { "normalizing `{:?}`", goal }
1512 /// Do not call this query directly: part of the `Normalize` type-op
1513 query type_op_normalize_fn_sig(
1514 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1516 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1519 desc { "normalizing `{:?}`", goal }
1522 query subst_and_check_impossible_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1524 "impossible substituted predicates:`{}`",
1525 tcx.def_path_str(key.0)
1529 query method_autoderef_steps(
1530 goal: CanonicalTyGoal<'tcx>
1531 ) -> MethodAutoderefStepsResult<'tcx> {
1532 desc { "computing autoderef types for `{:?}`", goal }
1537 query supported_target_features(_: CrateNum) -> FxHashMap<String, Option<Symbol>> {
1538 storage(ArenaCacheSelector<'tcx>)
1540 desc { "looking up supported target features" }
1543 /// Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1544 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1546 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1549 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1551 desc { "looking up enabled feature gates" }
1554 /// Attempt to resolve the given `DefId` to an `Instance`, for the
1555 /// given generics args (`SubstsRef`), returning one of:
1556 /// * `Ok(Some(instance))` on success
1557 /// * `Ok(None)` when the `SubstsRef` are still too generic,
1558 /// and therefore don't allow finding the final `Instance`
1559 /// * `Err(ErrorReported)` when the `Instance` resolution process
1560 /// couldn't complete due to errors elsewhere - this is distinct
1561 /// from `Ok(None)` to avoid misleading diagnostics when an error
1562 /// has already been/will be emitted, for the original cause
1563 query resolve_instance(
1564 key: ty::ParamEnvAnd<'tcx, (DefId, SubstsRef<'tcx>)>
1565 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1566 desc { "resolving instance `{}`", ty::Instance::new(key.value.0, key.value.1) }
1569 query resolve_instance_of_const_arg(
1570 key: ty::ParamEnvAnd<'tcx, (LocalDefId, DefId, SubstsRef<'tcx>)>
1571 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1573 "resolving instance of the const argument `{}`",
1574 ty::Instance::new(key.value.0.to_def_id(), key.value.2),
1578 query normalize_opaque_types(key: &'tcx ty::List<ty::Predicate<'tcx>>) -> &'tcx ty::List<ty::Predicate<'tcx>> {
1579 desc { "normalizing opaque types in {:?}", key }