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 native_libraries(_: CrateNum) -> Lrc<Vec<NativeLib>> {
177 desc { "looking up the native libraries of a linked crate" }
180 query lint_levels(_: CrateNum) -> LintLevelMap {
181 storage(ArenaCacheSelector<'tcx>)
183 desc { "computing the lint levels for items in this crate" }
186 query parent_module_from_def_id(key: LocalDefId) -> LocalDefId {
188 desc { |tcx| "parent module of `{}`", tcx.def_path_str(key.to_def_id()) }
193 query is_panic_runtime(_: CrateNum) -> bool {
195 desc { "checking if the crate is_panic_runtime" }
200 /// Set of all the `DefId`s in this crate that have MIR associated with
201 /// them. This includes all the body owners, but also things like struct
203 query mir_keys(_: CrateNum) -> FxHashSet<LocalDefId> {
204 storage(ArenaCacheSelector<'tcx>)
205 desc { "getting a list of all mir_keys" }
208 /// Maps DefId's that have an associated `mir::Body` to the result
209 /// of the MIR const-checking pass. This is the set of qualifs in
210 /// the final value of a `const`.
211 query mir_const_qualif(key: DefId) -> mir::ConstQualifs {
212 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
213 cache_on_disk_if { key.is_local() }
215 query mir_const_qualif_const_arg(
216 key: (LocalDefId, DefId)
217 ) -> mir::ConstQualifs {
219 |tcx| "const checking the const argument `{}`",
220 tcx.def_path_str(key.0.to_def_id())
224 /// Fetch the MIR for a given `DefId` right after it's built - this includes
225 /// unreachable code.
226 query mir_built(key: ty::WithOptConstParam<LocalDefId>) -> &'tcx Steal<mir::Body<'tcx>> {
227 desc { |tcx| "building MIR for `{}`", tcx.def_path_str(key.did.to_def_id()) }
230 /// Fetch the MIR for a given `DefId` up till the point where it is
231 /// ready for const qualification.
233 /// See the README for the `mir` module for details.
234 query mir_const(key: ty::WithOptConstParam<LocalDefId>) -> &'tcx Steal<mir::Body<'tcx>> {
236 |tcx| "processing MIR for {}`{}`",
237 if key.const_param_did.is_some() { "the const argument " } else { "" },
238 tcx.def_path_str(key.did.to_def_id()),
243 query mir_drops_elaborated_and_const_checked(
244 key: ty::WithOptConstParam<LocalDefId>
245 ) -> &'tcx Steal<mir::Body<'tcx>> {
247 desc { |tcx| "elaborating drops for `{}`", tcx.def_path_str(key.did.to_def_id()) }
250 query mir_promoted(key: ty::WithOptConstParam<LocalDefId>) ->
252 &'tcx Steal<mir::Body<'tcx>>,
253 &'tcx Steal<IndexVec<mir::Promoted, mir::Body<'tcx>>>
257 |tcx| "processing {}`{}`",
258 if key.const_param_did.is_some() { "the const argument " } else { "" },
259 tcx.def_path_str(key.did.to_def_id()),
263 /// MIR after our optimization passes have run. This is MIR that is ready
264 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
265 query optimized_mir(key: DefId) -> &'tcx mir::Body<'tcx> {
266 desc { |tcx| "optimizing MIR for `{}`", tcx.def_path_str(key) }
267 cache_on_disk_if { key.is_local() }
269 query optimized_mir_of_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::Body<'tcx> {
271 |tcx| "optimizing MIR for the const argument `{}`",
272 tcx.def_path_str(key.0.to_def_id())
276 /// Returns coverage summary info for a function, after executing the `InstrumentCoverage`
277 /// MIR pass (assuming the -Zinstrument-coverage option is enabled).
278 query coverageinfo(key: DefId) -> mir::CoverageInfo {
279 desc { |tcx| "retrieving coverage info from MIR for `{}`", tcx.def_path_str(key) }
280 storage(ArenaCacheSelector<'tcx>)
281 cache_on_disk_if { key.is_local() }
284 /// The `DefId` is the `DefId` of the containing MIR body. Promoteds to not have their own
286 query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
287 desc { |tcx| "optimizing promoted MIR for `{}`", tcx.def_path_str(key) }
288 cache_on_disk_if { key.is_local() }
290 query promoted_mir_of_const_arg(
291 key: (LocalDefId, DefId)
292 ) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
294 |tcx| "optimizing promoted MIR for the const argument `{}`",
295 tcx.def_path_str(key.0.to_def_id()),
301 // Erases regions from `ty` to yield a new type.
302 // Normally you would just use `tcx.erase_regions(&value)`,
303 // however, which uses this query as a kind of cache.
304 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
305 // This query is not expected to have input -- as a result, it
306 // is not a good candidates for "replay" because it is essentially a
307 // pure function of its input (and hence the expectation is that
308 // no caller would be green **apart** from just these
309 // queries). Making it anonymous avoids hashing the result, which
310 // may save a bit of time.
312 desc { "erasing regions from `{:?}`", ty }
317 query wasm_import_module_map(_: CrateNum) -> FxHashMap<DefId, String> {
318 storage(ArenaCacheSelector<'tcx>)
319 desc { "wasm import module map" }
324 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
325 /// predicates (where-clauses) directly defined on it. This is
326 /// equal to the `explicit_predicates_of` predicates plus the
327 /// `inferred_outlives_of` predicates.
328 query predicates_defined_on(key: DefId) -> ty::GenericPredicates<'tcx> {
329 desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
332 /// Returns the predicates written explicitly by the user.
333 query explicit_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
334 desc { |tcx| "computing explicit predicates of `{}`", tcx.def_path_str(key) }
337 /// Returns the inferred outlives predicates (e.g., for `struct
338 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
339 query inferred_outlives_of(key: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {
340 desc { |tcx| "computing inferred outlives predicates of `{}`", tcx.def_path_str(key) }
343 /// Maps from the `DefId` of a trait to the list of
344 /// super-predicates. This is a subset of the full list of
345 /// predicates. We store these in a separate map because we must
346 /// evaluate them even during type conversion, often before the
347 /// full predicates are available (note that supertraits have
348 /// additional acyclicity requirements).
349 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
350 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
353 /// To avoid cycles within the predicates of a single item we compute
354 /// per-type-parameter predicates for resolving `T::AssocTy`.
355 query type_param_predicates(key: (DefId, LocalDefId)) -> ty::GenericPredicates<'tcx> {
356 desc { |tcx| "computing the bounds for type parameter `{}`", {
357 let id = tcx.hir().local_def_id_to_hir_id(key.1);
358 tcx.hir().ty_param_name(id)
362 query trait_def(key: DefId) -> ty::TraitDef {
363 desc { |tcx| "computing trait definition for `{}`", tcx.def_path_str(key) }
364 storage(ArenaCacheSelector<'tcx>)
366 query adt_def(key: DefId) -> &'tcx ty::AdtDef {
367 desc { |tcx| "computing ADT definition for `{}`", tcx.def_path_str(key) }
369 query adt_destructor(key: DefId) -> Option<ty::Destructor> {
370 desc { |tcx| "computing `Drop` impl for `{}`", tcx.def_path_str(key) }
373 // The cycle error here should be reported as an error by `check_representable`.
374 // We consider the type as Sized in the meanwhile to avoid
375 // further errors (done in impl Value for AdtSizedConstraint).
376 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
377 // in case we accidentally otherwise don't emit an error.
378 query adt_sized_constraint(
380 ) -> AdtSizedConstraint<'tcx> {
381 desc { |tcx| "computing `Sized` constraints for `{}`", tcx.def_path_str(key) }
385 query adt_dtorck_constraint(
387 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {
388 desc { |tcx| "computing drop-check constraints for `{}`", tcx.def_path_str(key) }
391 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
392 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
393 /// not have the feature gate active).
395 /// **Do not call this function manually.** It is only meant to cache the base data for the
396 /// `is_const_fn` function.
397 query is_const_fn_raw(key: DefId) -> bool {
398 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
401 /// Returns `true` if this is a const `impl`. **Do not call this function manually.**
403 /// This query caches the base data for the `is_const_impl` helper function, which also
404 /// takes into account stability attributes (e.g., `#[rustc_const_unstable]`).
405 query is_const_impl_raw(key: DefId) -> bool {
406 desc { |tcx| "checking if item is const impl: `{}`", tcx.def_path_str(key) }
409 query asyncness(key: DefId) -> hir::IsAsync {
410 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
413 /// Returns `true` if calls to the function may be promoted.
415 /// This is either because the function is e.g., a tuple-struct or tuple-variant
416 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
417 /// be removed in the future in favour of some form of check which figures out whether the
418 /// function does not inspect the bits of any of its arguments (so is essentially just a
419 /// constructor function).
420 query is_promotable_const_fn(key: DefId) -> bool {
421 desc { |tcx| "checking if item is promotable: `{}`", tcx.def_path_str(key) }
424 query const_fn_is_allowed_fn_ptr(key: DefId) -> bool {
425 desc { |tcx| "checking if const fn allows `fn()` types: `{}`", tcx.def_path_str(key) }
428 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
429 query is_foreign_item(key: DefId) -> bool {
430 desc { |tcx| "checking if `{}` is a foreign item", tcx.def_path_str(key) }
433 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
434 query static_mutability(def_id: DefId) -> Option<hir::Mutability> {
435 desc { |tcx| "looking up static mutability of `{}`", tcx.def_path_str(def_id) }
438 /// Returns `Some(generator_kind)` if the node pointed to by `def_id` is a generator.
439 query generator_kind(def_id: DefId) -> Option<hir::GeneratorKind> {
440 desc { |tcx| "looking up generator kind of `{}`", tcx.def_path_str(def_id) }
443 /// Gets a map with the variance of every item; use `item_variance` instead.
444 query crate_variances(_: CrateNum) -> ty::CrateVariancesMap<'tcx> {
445 storage(ArenaCacheSelector<'tcx>)
446 desc { "computing the variances for items in this crate" }
449 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
450 query variances_of(def_id: DefId) -> &'tcx [ty::Variance] {
451 desc { |tcx| "computing the variances of `{}`", tcx.def_path_str(def_id) }
456 /// Maps from thee `DefId` of a type to its (inferred) outlives.
457 query inferred_outlives_crate(_: CrateNum)
458 -> ty::CratePredicatesMap<'tcx> {
459 storage(ArenaCacheSelector<'tcx>)
460 desc { "computing the inferred outlives predicates for items in this crate" }
465 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
466 query associated_item_def_ids(key: DefId) -> &'tcx [DefId] {
467 desc { |tcx| "collecting associated items of `{}`", tcx.def_path_str(key) }
470 /// Maps from a trait item to the trait item "descriptor".
471 query associated_item(key: DefId) -> ty::AssocItem {
472 desc { |tcx| "computing associated item data for `{}`", tcx.def_path_str(key) }
473 storage(ArenaCacheSelector<'tcx>)
476 /// Collects the associated items defined on a trait or impl.
477 query associated_items(key: DefId) -> ty::AssociatedItems<'tcx> {
478 storage(ArenaCacheSelector<'tcx>)
479 desc { |tcx| "collecting associated items of {}", tcx.def_path_str(key) }
482 query impl_trait_ref(key: DefId) -> Option<ty::TraitRef<'tcx>> {
483 desc { |tcx| "computing trait implemented by `{}`", tcx.def_path_str(key) }
485 query impl_polarity(key: DefId) -> ty::ImplPolarity {
486 desc { |tcx| "computing implementation polarity of `{}`", tcx.def_path_str(key) }
489 query issue33140_self_ty(key: DefId) -> Option<ty::Ty<'tcx>> {
490 desc { |tcx| "computing Self type wrt issue #33140 `{}`", tcx.def_path_str(key) }
495 /// Maps a `DefId` of a type to a list of its inherent impls.
496 /// Contains implementations of methods that are inherent to a type.
497 /// Methods in these implementations don't need to be exported.
498 query inherent_impls(key: DefId) -> &'tcx [DefId] {
499 desc { |tcx| "collecting inherent impls for `{}`", tcx.def_path_str(key) }
505 /// The result of unsafety-checking this `LocalDefId`.
506 query unsafety_check_result(key: LocalDefId) -> &'tcx mir::UnsafetyCheckResult {
507 desc { |tcx| "unsafety-checking `{}`", tcx.def_path_str(key.to_def_id()) }
508 cache_on_disk_if { true }
510 query unsafety_check_result_for_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::UnsafetyCheckResult {
512 |tcx| "unsafety-checking the const argument `{}`",
513 tcx.def_path_str(key.0.to_def_id())
517 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error.
519 /// Unsafety checking is executed for each method separately, but we only want
520 /// to emit this error once per derive. As there are some impls with multiple
521 /// methods, we use a query for deduplication.
522 query unsafe_derive_on_repr_packed(key: LocalDefId) -> () {
523 desc { |tcx| "processing `{}`", tcx.def_path_str(key.to_def_id()) }
526 /// The signature of functions.
527 query fn_sig(key: DefId) -> ty::PolyFnSig<'tcx> {
528 desc { |tcx| "computing function signature of `{}`", tcx.def_path_str(key) }
533 query lint_mod(key: LocalDefId) -> () {
534 desc { |tcx| "linting {}", describe_as_module(key, tcx) }
537 /// Checks the attributes in the module.
538 query check_mod_attrs(key: LocalDefId) -> () {
539 desc { |tcx| "checking attributes in {}", describe_as_module(key, tcx) }
542 query check_mod_unstable_api_usage(key: LocalDefId) -> () {
543 desc { |tcx| "checking for unstable API usage in {}", describe_as_module(key, tcx) }
546 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
547 query check_mod_const_bodies(key: LocalDefId) -> () {
548 desc { |tcx| "checking consts in {}", describe_as_module(key, tcx) }
551 /// Checks the loops in the module.
552 query check_mod_loops(key: LocalDefId) -> () {
553 desc { |tcx| "checking loops in {}", describe_as_module(key, tcx) }
556 query check_mod_item_types(key: LocalDefId) -> () {
557 desc { |tcx| "checking item types in {}", describe_as_module(key, tcx) }
560 query check_mod_privacy(key: LocalDefId) -> () {
561 desc { |tcx| "checking privacy in {}", describe_as_module(key, tcx) }
564 query check_mod_intrinsics(key: LocalDefId) -> () {
565 desc { |tcx| "checking intrinsics in {}", describe_as_module(key, tcx) }
568 query check_mod_liveness(key: LocalDefId) -> () {
569 desc { |tcx| "checking liveness of variables in {}", describe_as_module(key, tcx) }
572 query check_mod_impl_wf(key: LocalDefId) -> () {
573 desc { |tcx| "checking that impls are well-formed in {}", describe_as_module(key, tcx) }
576 query collect_mod_item_types(key: LocalDefId) -> () {
577 desc { |tcx| "collecting item types in {}", describe_as_module(key, tcx) }
580 /// Caches `CoerceUnsized` kinds for impls on custom types.
581 query coerce_unsized_info(key: DefId)
582 -> ty::adjustment::CoerceUnsizedInfo {
583 desc { |tcx| "computing CoerceUnsized info for `{}`", tcx.def_path_str(key) }
588 query typeck_item_bodies(_: CrateNum) -> () {
589 desc { "type-checking all item bodies" }
592 query typeck(key: LocalDefId) -> &'tcx ty::TypeckResults<'tcx> {
593 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
594 cache_on_disk_if { true }
596 query typeck_const_arg(
597 key: (LocalDefId, DefId)
598 ) -> &'tcx ty::TypeckResults<'tcx> {
600 |tcx| "type-checking the const argument `{}`",
601 tcx.def_path_str(key.0.to_def_id()),
604 query diagnostic_only_typeck(key: LocalDefId) -> &'tcx ty::TypeckResults<'tcx> {
605 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
606 cache_on_disk_if { true }
607 load_cached(tcx, id) {
608 let typeck_results: Option<ty::TypeckResults<'tcx>> = tcx
609 .queries.on_disk_cache
610 .try_load_query_result(tcx, id);
612 typeck_results.map(|x| &*tcx.arena.alloc(x))
618 query used_trait_imports(key: LocalDefId) -> &'tcx FxHashSet<LocalDefId> {
619 desc { |tcx| "used_trait_imports `{}`", tcx.def_path_str(key.to_def_id()) }
620 cache_on_disk_if { true }
625 query has_typeck_results(def_id: DefId) -> bool {
626 desc { |tcx| "checking whether `{}` has a body", tcx.def_path_str(def_id) }
629 query coherent_trait(def_id: DefId) -> () {
630 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
635 /// Borrow-checks the function body. If this is a closure, returns
636 /// additional requirements that the closure's creator must verify.
637 query mir_borrowck(key: LocalDefId) -> &'tcx mir::BorrowCheckResult<'tcx> {
638 desc { |tcx| "borrow-checking `{}`", tcx.def_path_str(key.to_def_id()) }
639 cache_on_disk_if(tcx, opt_result) {
640 tcx.is_closure(key.to_def_id())
641 || opt_result.map_or(false, |r| !r.concrete_opaque_types.is_empty())
644 query mir_borrowck_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::BorrowCheckResult<'tcx> {
646 |tcx| "borrow-checking the const argument`{}`",
647 tcx.def_path_str(key.0.to_def_id())
653 /// Gets a complete map from all types to their inherent impls.
654 /// Not meant to be used directly outside of coherence.
655 /// (Defined only for `LOCAL_CRATE`.)
656 query crate_inherent_impls(k: CrateNum)
657 -> CrateInherentImpls {
658 storage(ArenaCacheSelector<'tcx>)
660 desc { "all inherent impls defined in crate `{:?}`", k }
663 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
664 /// Not meant to be used directly outside of coherence.
665 /// (Defined only for `LOCAL_CRATE`.)
666 query crate_inherent_impls_overlap_check(_: CrateNum)
669 desc { "check for overlap between inherent impls defined in this crate" }
674 /// Evaluates a constant without running sanity checks.
676 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
677 /// during validation. Please add a comment to every use site explaining why using
678 /// `const_eval_validated` isn't sufficient. The returned constant also isn't in a suitable
679 /// form to be used outside of const eval.
680 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
681 -> ConstEvalRawResult<'tcx> {
683 "const-evaluating `{}`",
684 tcx.def_path_str(key.value.instance.def.def_id())
688 /// Results of evaluating const items or constants embedded in
689 /// other items (such as enum variant explicit discriminants).
691 /// In contrast to `const_eval_raw` this performs some validation on the constant, and
692 /// returns a proper constant that is usable by the rest of the compiler.
694 /// **Do not use this** directly, use one of the following wrappers: `tcx.const_eval_poly`,
695 /// `tcx.const_eval_resolve`, `tcx.const_eval_instance`, or `tcx.const_eval_global_id`.
696 query const_eval_validated(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
697 -> ConstEvalResult<'tcx> {
699 "const-evaluating + checking `{}`",
700 tcx.def_path_str(key.value.instance.def.def_id())
702 cache_on_disk_if(_, opt_result) {
703 // Only store results without errors
704 opt_result.map_or(true, |r| r.is_ok())
708 /// Destructure a constant ADT or array into its variant index and its
710 query destructure_const(
711 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
712 ) -> mir::DestructuredConst<'tcx> {
713 desc { "destructure constant" }
716 query const_caller_location(key: (rustc_span::Symbol, u32, u32)) -> ConstValue<'tcx> {
717 desc { "get a &core::panic::Location referring to a span" }
721 key: LitToConstInput<'tcx>
722 ) -> Result<&'tcx ty::Const<'tcx>, LitToConstError> {
723 desc { "converting literal to const" }
728 query check_match(key: DefId) {
729 desc { |tcx| "match-checking `{}`", tcx.def_path_str(key) }
730 cache_on_disk_if { key.is_local() }
733 /// Performs part of the privacy check and computes "access levels".
734 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
736 desc { "privacy access levels" }
738 query check_private_in_public(_: CrateNum) -> () {
740 desc { "checking for private elements in public interfaces" }
745 query reachable_set(_: CrateNum) -> FxHashSet<LocalDefId> {
746 storage(ArenaCacheSelector<'tcx>)
747 desc { "reachability" }
750 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
751 /// in the case of closures, this will be redirected to the enclosing function.
752 query region_scope_tree(def_id: DefId) -> &'tcx region::ScopeTree {
753 desc { |tcx| "computing drop scopes for `{}`", tcx.def_path_str(def_id) }
756 query mir_shims(key: ty::InstanceDef<'tcx>) -> mir::Body<'tcx> {
757 storage(ArenaCacheSelector<'tcx>)
758 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
761 /// The `symbol_name` query provides the symbol name for calling a
762 /// given instance from the local crate. In particular, it will also
763 /// look up the correct symbol name of instances from upstream crates.
764 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName<'tcx> {
765 desc { "computing the symbol for `{}`", key }
766 cache_on_disk_if { true }
769 query def_kind(def_id: DefId) -> DefKind {
770 desc { |tcx| "looking up definition kind of `{}`", tcx.def_path_str(def_id) }
772 query def_span(def_id: DefId) -> Span {
773 desc { |tcx| "looking up span for `{}`", tcx.def_path_str(def_id) }
774 // FIXME(mw): DefSpans are not really inputs since they are derived from
775 // HIR. But at the moment HIR hashing still contains some hacks that allow
776 // to make type debuginfo to be source location independent. Declaring
777 // DefSpan an input makes sure that changes to these are always detected
778 // regardless of HIR hashing.
781 query lookup_stability(def_id: DefId) -> Option<&'tcx attr::Stability> {
782 desc { |tcx| "looking up stability of `{}`", tcx.def_path_str(def_id) }
784 query lookup_const_stability(def_id: DefId) -> Option<&'tcx attr::ConstStability> {
785 desc { |tcx| "looking up const stability of `{}`", tcx.def_path_str(def_id) }
787 query lookup_deprecation_entry(def_id: DefId) -> Option<DeprecationEntry> {
788 desc { |tcx| "checking whether `{}` is deprecated", tcx.def_path_str(def_id) }
790 query item_attrs(def_id: DefId) -> &'tcx [ast::Attribute] {
791 desc { |tcx| "collecting attributes of `{}`", tcx.def_path_str(def_id) }
796 query codegen_fn_attrs(def_id: DefId) -> CodegenFnAttrs {
797 desc { |tcx| "computing codegen attributes of `{}`", tcx.def_path_str(def_id) }
798 storage(ArenaCacheSelector<'tcx>)
799 cache_on_disk_if { true }
804 query fn_arg_names(def_id: DefId) -> &'tcx [rustc_span::symbol::Ident] {
805 desc { |tcx| "looking up function parameter names for `{}`", tcx.def_path_str(def_id) }
807 /// Gets the rendered value of the specified constant or associated constant.
809 query rendered_const(def_id: DefId) -> String {
810 desc { |tcx| "rendering constant intializer of `{}`", tcx.def_path_str(def_id) }
812 query impl_parent(def_id: DefId) -> Option<DefId> {
813 desc { |tcx| "computing specialization parent impl of `{}`", tcx.def_path_str(def_id) }
818 query trait_of_item(def_id: DefId) -> Option<DefId> {
819 desc { |tcx| "finding trait defining `{}`", tcx.def_path_str(def_id) }
824 query is_mir_available(key: DefId) -> bool {
825 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
830 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
831 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
832 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
837 query codegen_fulfill_obligation(
838 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
839 ) -> Result<ImplSource<'tcx, ()>, ErrorReported> {
840 cache_on_disk_if { true }
842 "checking if `{}` fulfills its obligations",
843 tcx.def_path_str(key.1.def_id())
849 query all_local_trait_impls(key: CrateNum) -> &'tcx BTreeMap<DefId, Vec<hir::HirId>> {
850 desc { "local trait impls" }
852 query trait_impls_of(key: DefId) -> ty::trait_def::TraitImpls {
853 storage(ArenaCacheSelector<'tcx>)
854 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
856 query specialization_graph_of(key: DefId) -> specialization_graph::Graph {
857 storage(ArenaCacheSelector<'tcx>)
858 desc { |tcx| "building specialization graph of trait `{}`", tcx.def_path_str(key) }
859 cache_on_disk_if { true }
861 query object_safety_violations(key: DefId) -> &'tcx [traits::ObjectSafetyViolation] {
862 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
865 /// Gets the ParameterEnvironment for a given item; this environment
866 /// will be in "user-facing" mode, meaning that it is suitable for
867 /// type-checking etc, and it does not normalize specializable
868 /// associated types. This is almost always what you want,
869 /// unless you are doing MIR optimizations, in which case you
870 query param_env(def_id: DefId) -> ty::ParamEnv<'tcx> {
871 desc { |tcx| "computing normalized predicates of `{}`", tcx.def_path_str(def_id) }
874 /// Like `param_env`, but returns the `ParamEnv in `Reveal::All` mode.
875 /// Prefer this over `tcx.param_env(def_id).with_reveal_all_normalized(tcx)`,
876 /// as this method is more efficient.
877 query param_env_reveal_all_normalized(def_id: DefId) -> ty::ParamEnv<'tcx> {
878 desc { |tcx| "computing revealed normalized predicates of `{}`", tcx.def_path_str(def_id) }
881 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
882 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
883 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
884 desc { "computing whether `{}` is `Copy`", env.value }
886 /// Query backing `TyS::is_sized`.
887 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
888 desc { "computing whether `{}` is `Sized`", env.value }
890 /// Query backing `TyS::is_freeze`.
891 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
892 desc { "computing whether `{}` is freeze", env.value }
894 /// Query backing `TyS::needs_drop`.
895 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
896 desc { "computing whether `{}` needs drop", env.value }
899 /// Query backing `TyS::is_structural_eq_shallow`.
901 /// This is only correct for ADTs. Call `is_structural_eq_shallow` to handle all types
903 query has_structural_eq_impls(ty: Ty<'tcx>) -> bool {
905 "computing whether `{:?}` implements `PartialStructuralEq` and `StructuralEq`",
910 /// A list of types where the ADT requires drop if and only if any of
911 /// those types require drop. If the ADT is known to always need drop
912 /// then `Err(AlwaysRequiresDrop)` is returned.
913 query adt_drop_tys(def_id: DefId) -> Result<&'tcx ty::List<Ty<'tcx>>, AlwaysRequiresDrop> {
914 desc { |tcx| "computing when `{}` needs drop", tcx.def_path_str(def_id) }
915 cache_on_disk_if { true }
919 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
920 ) -> Result<&'tcx rustc_target::abi::Layout, ty::layout::LayoutError<'tcx>> {
921 desc { "computing layout of `{}`", env.value }
926 query dylib_dependency_formats(_: CrateNum)
927 -> &'tcx [(CrateNum, LinkagePreference)] {
928 desc { "dylib dependency formats of crate" }
931 query dependency_formats(_: CrateNum)
932 -> Lrc<crate::middle::dependency_format::Dependencies>
934 desc { "get the linkage format of all dependencies" }
939 query is_compiler_builtins(_: CrateNum) -> bool {
941 desc { "checking if the crate is_compiler_builtins" }
943 query has_global_allocator(_: CrateNum) -> bool {
945 desc { "checking if the crate has_global_allocator" }
947 query has_panic_handler(_: CrateNum) -> bool {
949 desc { "checking if the crate has_panic_handler" }
951 query is_profiler_runtime(_: CrateNum) -> bool {
953 desc { "query a crate is `#![profiler_runtime]`" }
955 query panic_strategy(_: CrateNum) -> PanicStrategy {
957 desc { "query a crate's configured panic strategy" }
959 query is_no_builtins(_: CrateNum) -> bool {
961 desc { "test whether a crate has `#![no_builtins]`" }
963 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
965 desc { "query a crate's symbol mangling version" }
968 query extern_crate(def_id: DefId) -> Option<&'tcx ExternCrate> {
970 desc { "getting crate's ExternCrateData" }
975 query specializes(_: (DefId, DefId)) -> bool {
976 desc { "computing whether impls specialize one another" }
978 query in_scope_traits_map(_: LocalDefId)
979 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
981 desc { "traits in scope at a block" }
986 query module_exports(def_id: LocalDefId) -> Option<&'tcx [Export<LocalDefId>]> {
987 desc { |tcx| "looking up items exported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
993 query impl_defaultness(def_id: DefId) -> hir::Defaultness {
994 desc { |tcx| "looking up whether `{}` is a default impl", tcx.def_path_str(def_id) }
997 query check_item_well_formed(key: LocalDefId) -> () {
998 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1000 query check_trait_item_well_formed(key: LocalDefId) -> () {
1001 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1003 query check_impl_item_well_formed(key: LocalDefId) -> () {
1004 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1010 // The `DefId`s of all non-generic functions and statics in the given crate
1011 // that can be reached from outside the crate.
1013 // We expect this items to be available for being linked to.
1015 // This query can also be called for `LOCAL_CRATE`. In this case it will
1016 // compute which items will be reachable to other crates, taking into account
1017 // the kind of crate that is currently compiled. Crates with only a
1018 // C interface have fewer reachable things.
1020 // Does not include external symbols that don't have a corresponding DefId,
1021 // like the compiler-generated `main` function and so on.
1022 query reachable_non_generics(_: CrateNum)
1023 -> DefIdMap<SymbolExportLevel> {
1024 storage(ArenaCacheSelector<'tcx>)
1025 desc { "looking up the exported symbols of a crate" }
1027 query is_reachable_non_generic(def_id: DefId) -> bool {
1028 desc { |tcx| "checking whether `{}` is an exported symbol", tcx.def_path_str(def_id) }
1030 query is_unreachable_local_definition(def_id: DefId) -> bool {
1032 "checking whether `{}` is reachable from outside the crate",
1033 tcx.def_path_str(def_id),
1039 /// The entire set of monomorphizations the local crate can safely link
1040 /// to because they are exported from upstream crates. Do not depend on
1041 /// this directly, as its value changes anytime a monomorphization gets
1042 /// added or removed in any upstream crate. Instead use the narrower
1043 /// `upstream_monomorphizations_for`, `upstream_drop_glue_for`, or, even
1044 /// better, `Instance::upstream_monomorphization()`.
1045 query upstream_monomorphizations(
1047 ) -> DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
1048 storage(ArenaCacheSelector<'tcx>)
1049 desc { "collecting available upstream monomorphizations `{:?}`", k }
1052 /// Returns the set of upstream monomorphizations available for the
1053 /// generic function identified by the given `def_id`. The query makes
1054 /// sure to make a stable selection if the same monomorphization is
1055 /// available in multiple upstream crates.
1057 /// You likely want to call `Instance::upstream_monomorphization()`
1058 /// instead of invoking this query directly.
1059 query upstream_monomorphizations_for(def_id: DefId)
1060 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {
1062 "collecting available upstream monomorphizations for `{}`",
1063 tcx.def_path_str(def_id),
1067 /// Returns the upstream crate that exports drop-glue for the given
1068 /// type (`substs` is expected to be a single-item list containing the
1069 /// type one wants drop-glue for).
1071 /// This is a subset of `upstream_monomorphizations_for` in order to
1072 /// increase dep-tracking granularity. Otherwise adding or removing any
1073 /// type with drop-glue in any upstream crate would invalidate all
1074 /// functions calling drop-glue of an upstream type.
1076 /// You likely want to call `Instance::upstream_monomorphization()`
1077 /// instead of invoking this query directly.
1079 /// NOTE: This query could easily be extended to also support other
1080 /// common functions that have are large set of monomorphizations
1081 /// (like `Clone::clone` for example).
1082 query upstream_drop_glue_for(substs: SubstsRef<'tcx>) -> Option<CrateNum> {
1083 desc { "available upstream drop-glue for `{:?}`", substs }
1088 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
1089 desc { "looking up the foreign modules of a linked crate" }
1092 /// Identifies the entry-point (e.g., the `main` function) for a given
1093 /// crate, returning `None` if there is no entry point (such as for library crates).
1094 query entry_fn(_: CrateNum) -> Option<(LocalDefId, EntryFnType)> {
1095 desc { "looking up the entry function of a crate" }
1097 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
1098 desc { "looking up the plugin registrar for a crate" }
1100 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
1101 desc { "looking up the derive registrar for a crate" }
1103 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
1105 desc { "looking up the disambiguator a crate" }
1107 query crate_hash(_: CrateNum) -> Svh {
1109 desc { "looking up the hash a crate" }
1111 query crate_host_hash(_: CrateNum) -> Option<Svh> {
1113 desc { "looking up the hash of a host version of a crate" }
1115 query original_crate_name(_: CrateNum) -> Symbol {
1117 desc { "looking up the original name a crate" }
1119 query extra_filename(_: CrateNum) -> String {
1121 desc { "looking up the extra filename for a crate" }
1123 query crate_extern_paths(_: CrateNum) -> Vec<PathBuf> {
1125 desc { "looking up the paths for extern crates" }
1130 query implementations_of_trait(_: (CrateNum, DefId))
1131 -> &'tcx [(DefId, Option<ty::fast_reject::SimplifiedType>)] {
1132 desc { "looking up implementations of a trait in a crate" }
1134 query all_trait_implementations(_: CrateNum)
1135 -> &'tcx [(DefId, Option<ty::fast_reject::SimplifiedType>)] {
1136 desc { "looking up all (?) trait implementations" }
1141 query dllimport_foreign_items(_: CrateNum)
1142 -> FxHashSet<DefId> {
1143 storage(ArenaCacheSelector<'tcx>)
1144 desc { "dllimport_foreign_items" }
1146 query is_dllimport_foreign_item(def_id: DefId) -> bool {
1147 desc { |tcx| "is_dllimport_foreign_item({})", tcx.def_path_str(def_id) }
1149 query is_statically_included_foreign_item(def_id: DefId) -> bool {
1150 desc { |tcx| "is_statically_included_foreign_item({})", tcx.def_path_str(def_id) }
1152 query native_library_kind(def_id: DefId)
1153 -> Option<NativeLibKind> {
1154 desc { |tcx| "native_library_kind({})", tcx.def_path_str(def_id) }
1159 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
1161 desc { "looking up link arguments for a crate" }
1166 /// Lifetime resolution. See `middle::resolve_lifetimes`.
1167 query resolve_lifetimes(_: CrateNum) -> ResolveLifetimes {
1168 storage(ArenaCacheSelector<'tcx>)
1169 desc { "resolving lifetimes" }
1171 query named_region_map(_: LocalDefId) ->
1172 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
1173 desc { "looking up a named region" }
1175 query is_late_bound_map(_: LocalDefId) ->
1176 Option<&'tcx FxHashSet<ItemLocalId>> {
1177 desc { "testing if a region is late bound" }
1179 query object_lifetime_defaults_map(_: LocalDefId)
1180 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
1181 desc { "looking up lifetime defaults for a region" }
1186 query visibility(def_id: DefId) -> ty::Visibility {
1187 desc { |tcx| "computing visibility of `{}`", tcx.def_path_str(def_id) }
1192 query dep_kind(_: CrateNum) -> CrateDepKind {
1194 desc { "fetching what a dependency looks like" }
1196 query crate_name(_: CrateNum) -> Symbol {
1198 desc { "fetching what a crate is named" }
1200 query item_children(def_id: DefId) -> &'tcx [Export<hir::HirId>] {
1201 desc { |tcx| "collecting child items of `{}`", tcx.def_path_str(def_id) }
1203 query extern_mod_stmt_cnum(def_id: LocalDefId) -> Option<CrateNum> {
1204 desc { |tcx| "computing crate imported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
1207 query get_lib_features(_: CrateNum) -> LibFeatures {
1208 storage(ArenaCacheSelector<'tcx>)
1210 desc { "calculating the lib features map" }
1212 query defined_lib_features(_: CrateNum)
1213 -> &'tcx [(Symbol, Option<Symbol>)] {
1214 desc { "calculating the lib features defined in a crate" }
1216 /// Returns the lang items defined in another crate by loading it from metadata.
1217 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
1218 // of that argument?
1219 query get_lang_items(_: CrateNum) -> LanguageItems {
1220 storage(ArenaCacheSelector<'tcx>)
1222 desc { "calculating the lang items map" }
1225 /// Returns all diagnostic items defined in all crates.
1226 query all_diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1227 storage(ArenaCacheSelector<'tcx>)
1229 desc { "calculating the diagnostic items map" }
1232 /// Returns the lang items defined in another crate by loading it from metadata.
1233 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
1234 desc { "calculating the lang items defined in a crate" }
1237 /// Returns the diagnostic items defined in a crate.
1238 query diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1239 storage(ArenaCacheSelector<'tcx>)
1240 desc { "calculating the diagnostic items map in a crate" }
1243 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
1244 desc { "calculating the missing lang items in a crate" }
1246 query visible_parent_map(_: CrateNum)
1247 -> DefIdMap<DefId> {
1248 storage(ArenaCacheSelector<'tcx>)
1249 desc { "calculating the visible parent map" }
1251 query missing_extern_crate_item(_: CrateNum) -> bool {
1253 desc { "seeing if we're missing an `extern crate` item for this crate" }
1255 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
1257 desc { "looking at the source for a crate" }
1259 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
1261 desc { "generating a postorder list of CrateNums" }
1264 query upvars_mentioned(def_id: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
1265 desc { |tcx| "collecting upvars mentioned in `{}`", tcx.def_path_str(def_id) }
1268 query maybe_unused_trait_import(def_id: LocalDefId) -> bool {
1270 desc { |tcx| "maybe_unused_trait_import for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1272 query maybe_unused_extern_crates(_: CrateNum)
1273 -> &'tcx [(LocalDefId, Span)] {
1275 desc { "looking up all possibly unused extern crates" }
1277 query names_imported_by_glob_use(def_id: LocalDefId)
1278 -> &'tcx FxHashSet<Symbol> {
1280 desc { |tcx| "names_imported_by_glob_use for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1283 query stability_index(_: CrateNum) -> stability::Index<'tcx> {
1284 storage(ArenaCacheSelector<'tcx>)
1286 desc { "calculating the stability index for the local crate" }
1288 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
1290 desc { "fetching all foreign CrateNum instances" }
1293 /// A vector of every trait accessible in the whole crate
1294 /// (i.e., including those from subcrates). This is used only for
1295 /// error reporting.
1296 query all_traits(_: CrateNum) -> &'tcx [DefId] {
1297 desc { "fetching all foreign and local traits" }
1302 /// The list of symbols exported from the given crate.
1304 /// - All names contained in `exported_symbols(cnum)` are guaranteed to
1305 /// correspond to a publicly visible symbol in `cnum` machine code.
1306 /// - The `exported_symbols` sets of different crates do not intersect.
1307 query exported_symbols(_: CrateNum)
1308 -> &'tcx [(ExportedSymbol<'tcx>, SymbolExportLevel)] {
1309 desc { "exported_symbols" }
1314 query collect_and_partition_mono_items(_: CrateNum)
1315 -> (&'tcx DefIdSet, &'tcx [CodegenUnit<'tcx>]) {
1317 desc { "collect_and_partition_mono_items" }
1319 query is_codegened_item(def_id: DefId) -> bool {
1320 desc { |tcx| "determining whether `{}` needs codegen", tcx.def_path_str(def_id) }
1322 query codegen_unit(_: Symbol) -> &'tcx CodegenUnit<'tcx> {
1323 desc { "codegen_unit" }
1325 query unused_generic_params(key: DefId) -> FiniteBitSet<u32> {
1326 cache_on_disk_if { key.is_local() }
1328 |tcx| "determining which generic parameters are unused by `{}`",
1329 tcx.def_path_str(key)
1332 query backend_optimization_level(_: CrateNum) -> OptLevel {
1333 desc { "optimization level used by backend" }
1338 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
1340 desc { "output_filenames" }
1345 /// Do not call this query directly: invoke `normalize` instead.
1346 query normalize_projection_ty(
1347 goal: CanonicalProjectionGoal<'tcx>
1349 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
1352 desc { "normalizing `{:?}`", goal }
1355 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
1356 query normalize_generic_arg_after_erasing_regions(
1357 goal: ParamEnvAnd<'tcx, GenericArg<'tcx>>
1358 ) -> GenericArg<'tcx> {
1359 desc { "normalizing `{}`", goal.value }
1362 query implied_outlives_bounds(
1363 goal: CanonicalTyGoal<'tcx>
1365 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
1368 desc { "computing implied outlives bounds for `{:?}`", goal }
1371 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
1372 query dropck_outlives(
1373 goal: CanonicalTyGoal<'tcx>
1375 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1378 desc { "computing dropck types for `{:?}`", goal }
1381 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1382 /// `infcx.predicate_must_hold()` instead.
1383 query evaluate_obligation(
1384 goal: CanonicalPredicateGoal<'tcx>
1385 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1386 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1389 query evaluate_goal(
1390 goal: traits::ChalkCanonicalGoal<'tcx>
1392 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1395 desc { "evaluating trait selection obligation `{}`", goal.value }
1398 query type_implements_trait(
1399 key: (DefId, Ty<'tcx>, SubstsRef<'tcx>, ty::ParamEnv<'tcx>, )
1401 desc { "evaluating `type_implements_trait` `{:?}`", key }
1404 /// Do not call this query directly: part of the `Eq` type-op
1405 query type_op_ascribe_user_type(
1406 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1408 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1411 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1414 /// Do not call this query directly: part of the `Eq` type-op
1416 goal: CanonicalTypeOpEqGoal<'tcx>
1418 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1421 desc { "evaluating `type_op_eq` `{:?}`", goal }
1424 /// Do not call this query directly: part of the `Subtype` type-op
1425 query type_op_subtype(
1426 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1428 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1431 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1434 /// Do not call this query directly: part of the `ProvePredicate` type-op
1435 query type_op_prove_predicate(
1436 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1438 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1441 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1444 /// Do not call this query directly: part of the `Normalize` type-op
1445 query type_op_normalize_ty(
1446 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1448 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1451 desc { "normalizing `{:?}`", goal }
1454 /// Do not call this query directly: part of the `Normalize` type-op
1455 query type_op_normalize_predicate(
1456 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1458 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1461 desc { "normalizing `{:?}`", goal }
1464 /// Do not call this query directly: part of the `Normalize` type-op
1465 query type_op_normalize_poly_fn_sig(
1466 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1468 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1471 desc { "normalizing `{:?}`", goal }
1474 /// Do not call this query directly: part of the `Normalize` type-op
1475 query type_op_normalize_fn_sig(
1476 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1478 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1481 desc { "normalizing `{:?}`", goal }
1484 query subst_and_check_impossible_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1486 "impossible substituted predicates:`{}`",
1487 tcx.def_path_str(key.0)
1491 query method_autoderef_steps(
1492 goal: CanonicalTyGoal<'tcx>
1493 ) -> MethodAutoderefStepsResult<'tcx> {
1494 desc { "computing autoderef types for `{:?}`", goal }
1499 query supported_target_features(_: CrateNum) -> FxHashMap<String, Option<Symbol>> {
1500 storage(ArenaCacheSelector<'tcx>)
1502 desc { "looking up supported target features" }
1505 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1506 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1508 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1511 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1513 desc { "looking up enabled feature gates" }
1516 /// Attempt to resolve the given `DefId` to an `Instance`, for the
1517 /// given generics args (`SubstsRef`), returning one of:
1518 /// * `Ok(Some(instance))` on success
1519 /// * `Ok(None)` when the `SubstsRef` are still too generic,
1520 /// and therefore don't allow finding the final `Instance`
1521 /// * `Err(ErrorReported)` when the `Instance` resolution process
1522 /// couldn't complete due to errors elsewhere - this is distinct
1523 /// from `Ok(None)` to avoid misleading diagnostics when an error
1524 /// has already been/will be emitted, for the original cause
1525 query resolve_instance(
1526 key: ty::ParamEnvAnd<'tcx, (DefId, SubstsRef<'tcx>)>
1527 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1528 desc { "resolving instance `{}`", ty::Instance::new(key.value.0, key.value.1) }
1531 query resolve_instance_of_const_arg(
1532 key: ty::ParamEnvAnd<'tcx, (LocalDefId, DefId, SubstsRef<'tcx>)>
1533 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1535 "resolving instance of the const argument `{}`",
1536 ty::Instance::new(key.value.0.to_def_id(), key.value.2),
1540 query normalize_opaque_types(key: &'tcx ty::List<ty::Predicate<'tcx>>) -> &'tcx ty::List<ty::Predicate<'tcx>> {
1541 desc { "normalizing opaque types in {:?}", key }