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_validated(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 query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
285 desc { |tcx| "optimizing promoted MIR for `{}`", tcx.def_path_str(key) }
286 cache_on_disk_if { key.is_local() }
288 query promoted_mir_of_const_arg(
289 key: (LocalDefId, DefId)
290 ) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
292 |tcx| "optimizing promoted MIR for the const argument `{}`",
293 tcx.def_path_str(key.0.to_def_id()),
299 // Erases regions from `ty` to yield a new type.
300 // Normally you would just use `tcx.erase_regions(&value)`,
301 // however, which uses this query as a kind of cache.
302 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
303 // This query is not expected to have input -- as a result, it
304 // is not a good candidates for "replay" because it is essentially a
305 // pure function of its input (and hence the expectation is that
306 // no caller would be green **apart** from just these
307 // queries). Making it anonymous avoids hashing the result, which
308 // may save a bit of time.
310 desc { "erasing regions from `{:?}`", ty }
315 query wasm_import_module_map(_: CrateNum) -> FxHashMap<DefId, String> {
316 storage(ArenaCacheSelector<'tcx>)
317 desc { "wasm import module map" }
322 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
323 /// predicates (where-clauses) directly defined on it. This is
324 /// equal to the `explicit_predicates_of` predicates plus the
325 /// `inferred_outlives_of` predicates.
326 query predicates_defined_on(key: DefId) -> ty::GenericPredicates<'tcx> {
327 desc { |tcx| "computing predicates of `{}`", tcx.def_path_str(key) }
330 /// Returns the predicates written explicitly by the user.
331 query explicit_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
332 desc { |tcx| "computing explicit predicates of `{}`", tcx.def_path_str(key) }
335 /// Returns the inferred outlives predicates (e.g., for `struct
336 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
337 query inferred_outlives_of(key: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {
338 desc { |tcx| "computing inferred outlives predicates of `{}`", tcx.def_path_str(key) }
341 /// Maps from the `DefId` of a trait to the list of
342 /// super-predicates. This is a subset of the full list of
343 /// predicates. We store these in a separate map because we must
344 /// evaluate them even during type conversion, often before the
345 /// full predicates are available (note that supertraits have
346 /// additional acyclicity requirements).
347 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
348 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
351 /// To avoid cycles within the predicates of a single item we compute
352 /// per-type-parameter predicates for resolving `T::AssocTy`.
353 query type_param_predicates(key: (DefId, LocalDefId)) -> ty::GenericPredicates<'tcx> {
354 desc { |tcx| "computing the bounds for type parameter `{}`", {
355 let id = tcx.hir().local_def_id_to_hir_id(key.1);
356 tcx.hir().ty_param_name(id)
360 query trait_def(key: DefId) -> ty::TraitDef {
361 desc { |tcx| "computing trait definition for `{}`", tcx.def_path_str(key) }
362 storage(ArenaCacheSelector<'tcx>)
364 query adt_def(key: DefId) -> &'tcx ty::AdtDef {
365 desc { |tcx| "computing ADT definition for `{}`", tcx.def_path_str(key) }
367 query adt_destructor(key: DefId) -> Option<ty::Destructor> {
368 desc { |tcx| "computing `Drop` impl for `{}`", tcx.def_path_str(key) }
371 // The cycle error here should be reported as an error by `check_representable`.
372 // We consider the type as Sized in the meanwhile to avoid
373 // further errors (done in impl Value for AdtSizedConstraint).
374 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
375 // in case we accidentally otherwise don't emit an error.
376 query adt_sized_constraint(
378 ) -> AdtSizedConstraint<'tcx> {
379 desc { |tcx| "computing `Sized` constraints for `{}`", tcx.def_path_str(key) }
383 query adt_dtorck_constraint(
385 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {
386 desc { |tcx| "computing drop-check constraints for `{}`", tcx.def_path_str(key) }
389 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
390 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
391 /// not have the feature gate active).
393 /// **Do not call this function manually.** It is only meant to cache the base data for the
394 /// `is_const_fn` function.
395 query is_const_fn_raw(key: DefId) -> bool {
396 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
399 /// Returns `true` if this is a const `impl`. **Do not call this function manually.**
401 /// This query caches the base data for the `is_const_impl` helper function, which also
402 /// takes into account stability attributes (e.g., `#[rustc_const_unstable]`).
403 query is_const_impl_raw(key: DefId) -> bool {
404 desc { |tcx| "checking if item is const impl: `{}`", tcx.def_path_str(key) }
407 query asyncness(key: DefId) -> hir::IsAsync {
408 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
411 /// Returns `true` if calls to the function may be promoted.
413 /// This is either because the function is e.g., a tuple-struct or tuple-variant
414 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
415 /// be removed in the future in favour of some form of check which figures out whether the
416 /// function does not inspect the bits of any of its arguments (so is essentially just a
417 /// constructor function).
418 query is_promotable_const_fn(key: DefId) -> bool {
419 desc { |tcx| "checking if item is promotable: `{}`", tcx.def_path_str(key) }
422 query const_fn_is_allowed_fn_ptr(key: DefId) -> bool {
423 desc { |tcx| "checking if const fn allows `fn()` types: `{}`", tcx.def_path_str(key) }
426 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
427 query is_foreign_item(key: DefId) -> bool {
428 desc { |tcx| "checking if `{}` is a foreign item", tcx.def_path_str(key) }
431 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
432 query static_mutability(def_id: DefId) -> Option<hir::Mutability> {
433 desc { |tcx| "looking up static mutability of `{}`", tcx.def_path_str(def_id) }
436 /// Returns `Some(generator_kind)` if the node pointed to by `def_id` is a generator.
437 query generator_kind(def_id: DefId) -> Option<hir::GeneratorKind> {
438 desc { |tcx| "looking up generator kind of `{}`", tcx.def_path_str(def_id) }
441 /// Gets a map with the variance of every item; use `item_variance` instead.
442 query crate_variances(_: CrateNum) -> ty::CrateVariancesMap<'tcx> {
443 storage(ArenaCacheSelector<'tcx>)
444 desc { "computing the variances for items in this crate" }
447 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
448 query variances_of(def_id: DefId) -> &'tcx [ty::Variance] {
449 desc { |tcx| "computing the variances of `{}`", tcx.def_path_str(def_id) }
454 /// Maps from thee `DefId` of a type to its (inferred) outlives.
455 query inferred_outlives_crate(_: CrateNum)
456 -> ty::CratePredicatesMap<'tcx> {
457 storage(ArenaCacheSelector<'tcx>)
458 desc { "computing the inferred outlives predicates for items in this crate" }
463 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
464 query associated_item_def_ids(key: DefId) -> &'tcx [DefId] {
465 desc { |tcx| "collecting associated items of `{}`", tcx.def_path_str(key) }
468 /// Maps from a trait item to the trait item "descriptor".
469 query associated_item(key: DefId) -> ty::AssocItem {
470 desc { |tcx| "computing associated item data for `{}`", tcx.def_path_str(key) }
471 storage(ArenaCacheSelector<'tcx>)
474 /// Collects the associated items defined on a trait or impl.
475 query associated_items(key: DefId) -> ty::AssociatedItems<'tcx> {
476 storage(ArenaCacheSelector<'tcx>)
477 desc { |tcx| "collecting associated items of {}", tcx.def_path_str(key) }
480 query impl_trait_ref(key: DefId) -> Option<ty::TraitRef<'tcx>> {
481 desc { |tcx| "computing trait implemented by `{}`", tcx.def_path_str(key) }
483 query impl_polarity(key: DefId) -> ty::ImplPolarity {
484 desc { |tcx| "computing implementation polarity of `{}`", tcx.def_path_str(key) }
487 query issue33140_self_ty(key: DefId) -> Option<ty::Ty<'tcx>> {
488 desc { |tcx| "computing Self type wrt issue #33140 `{}`", tcx.def_path_str(key) }
493 /// Maps a `DefId` of a type to a list of its inherent impls.
494 /// Contains implementations of methods that are inherent to a type.
495 /// Methods in these implementations don't need to be exported.
496 query inherent_impls(key: DefId) -> &'tcx [DefId] {
497 desc { |tcx| "collecting inherent impls for `{}`", tcx.def_path_str(key) }
503 /// The result of unsafety-checking this `LocalDefId`.
504 query unsafety_check_result(key: LocalDefId) -> &'tcx mir::UnsafetyCheckResult {
505 desc { |tcx| "unsafety-checking `{}`", tcx.def_path_str(key.to_def_id()) }
506 cache_on_disk_if { true }
508 query unsafety_check_result_for_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::UnsafetyCheckResult {
510 |tcx| "unsafety-checking the const argument `{}`",
511 tcx.def_path_str(key.0.to_def_id())
515 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error.
517 /// Unsafety checking is executed for each method separately, but we only want
518 /// to emit this error once per derive. As there are some impls with multiple
519 /// methods, we use a query for deduplication.
520 query unsafe_derive_on_repr_packed(key: LocalDefId) -> () {
521 desc { |tcx| "processing `{}`", tcx.def_path_str(key.to_def_id()) }
524 /// The signature of functions.
525 query fn_sig(key: DefId) -> ty::PolyFnSig<'tcx> {
526 desc { |tcx| "computing function signature of `{}`", tcx.def_path_str(key) }
531 query lint_mod(key: LocalDefId) -> () {
532 desc { |tcx| "linting {}", describe_as_module(key, tcx) }
535 /// Checks the attributes in the module.
536 query check_mod_attrs(key: LocalDefId) -> () {
537 desc { |tcx| "checking attributes in {}", describe_as_module(key, tcx) }
540 query check_mod_unstable_api_usage(key: LocalDefId) -> () {
541 desc { |tcx| "checking for unstable API usage in {}", describe_as_module(key, tcx) }
544 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
545 query check_mod_const_bodies(key: LocalDefId) -> () {
546 desc { |tcx| "checking consts in {}", describe_as_module(key, tcx) }
549 /// Checks the loops in the module.
550 query check_mod_loops(key: LocalDefId) -> () {
551 desc { |tcx| "checking loops in {}", describe_as_module(key, tcx) }
554 query check_mod_item_types(key: LocalDefId) -> () {
555 desc { |tcx| "checking item types in {}", describe_as_module(key, tcx) }
558 query check_mod_privacy(key: LocalDefId) -> () {
559 desc { |tcx| "checking privacy in {}", describe_as_module(key, tcx) }
562 query check_mod_intrinsics(key: LocalDefId) -> () {
563 desc { |tcx| "checking intrinsics in {}", describe_as_module(key, tcx) }
566 query check_mod_liveness(key: LocalDefId) -> () {
567 desc { |tcx| "checking liveness of variables in {}", describe_as_module(key, tcx) }
570 query check_mod_impl_wf(key: LocalDefId) -> () {
571 desc { |tcx| "checking that impls are well-formed in {}", describe_as_module(key, tcx) }
574 query collect_mod_item_types(key: LocalDefId) -> () {
575 desc { |tcx| "collecting item types in {}", describe_as_module(key, tcx) }
578 /// Caches `CoerceUnsized` kinds for impls on custom types.
579 query coerce_unsized_info(key: DefId)
580 -> ty::adjustment::CoerceUnsizedInfo {
581 desc { |tcx| "computing CoerceUnsized info for `{}`", tcx.def_path_str(key) }
586 query typeck_item_bodies(_: CrateNum) -> () {
587 desc { "type-checking all item bodies" }
590 query typeck(key: LocalDefId) -> &'tcx ty::TypeckResults<'tcx> {
591 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
592 cache_on_disk_if { true }
594 query typeck_const_arg(
595 key: (LocalDefId, DefId)
596 ) -> &'tcx ty::TypeckResults<'tcx> {
598 |tcx| "type-checking the const argument `{}`",
599 tcx.def_path_str(key.0.to_def_id()),
602 query diagnostic_only_typeck(key: LocalDefId) -> &'tcx ty::TypeckResults<'tcx> {
603 desc { |tcx| "type-checking `{}`", tcx.def_path_str(key.to_def_id()) }
604 cache_on_disk_if { true }
605 load_cached(tcx, id) {
606 let typeck_results: Option<ty::TypeckResults<'tcx>> = tcx
607 .queries.on_disk_cache
608 .try_load_query_result(tcx, id);
610 typeck_results.map(|x| &*tcx.arena.alloc(x))
616 query used_trait_imports(key: LocalDefId) -> &'tcx FxHashSet<LocalDefId> {
617 desc { |tcx| "used_trait_imports `{}`", tcx.def_path_str(key.to_def_id()) }
618 cache_on_disk_if { true }
623 query has_typeck_results(def_id: DefId) -> bool {
624 desc { |tcx| "checking whether `{}` has a body", tcx.def_path_str(def_id) }
627 query coherent_trait(def_id: DefId) -> () {
628 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
633 /// Borrow-checks the function body. If this is a closure, returns
634 /// additional requirements that the closure's creator must verify.
635 query mir_borrowck(key: LocalDefId) -> &'tcx mir::BorrowCheckResult<'tcx> {
636 desc { |tcx| "borrow-checking `{}`", tcx.def_path_str(key.to_def_id()) }
637 cache_on_disk_if(tcx, opt_result) {
638 tcx.is_closure(key.to_def_id())
639 || opt_result.map_or(false, |r| !r.concrete_opaque_types.is_empty())
642 query mir_borrowck_const_arg(key: (LocalDefId, DefId)) -> &'tcx mir::BorrowCheckResult<'tcx> {
644 |tcx| "borrow-checking the const argument`{}`",
645 tcx.def_path_str(key.0.to_def_id())
651 /// Gets a complete map from all types to their inherent impls.
652 /// Not meant to be used directly outside of coherence.
653 /// (Defined only for `LOCAL_CRATE`.)
654 query crate_inherent_impls(k: CrateNum)
655 -> CrateInherentImpls {
656 storage(ArenaCacheSelector<'tcx>)
658 desc { "all inherent impls defined in crate `{:?}`", k }
661 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
662 /// Not meant to be used directly outside of coherence.
663 /// (Defined only for `LOCAL_CRATE`.)
664 query crate_inherent_impls_overlap_check(_: CrateNum)
667 desc { "check for overlap between inherent impls defined in this crate" }
672 /// Evaluates a constant without running sanity checks.
674 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
675 /// during validation. Please add a comment to every use site explaining why using
676 /// `const_eval_validated` isn't sufficient. The returned constant also isn't in a suitable
677 /// form to be used outside of const eval.
678 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
679 -> ConstEvalRawResult<'tcx> {
681 "const-evaluating `{}`",
682 tcx.def_path_str(key.value.instance.def.def_id())
686 /// Results of evaluating const items or constants embedded in
687 /// other items (such as enum variant explicit discriminants).
689 /// In contrast to `const_eval_raw` this performs some validation on the constant, and
690 /// returns a proper constant that is usable by the rest of the compiler.
692 /// **Do not use this** directly, use one of the following wrappers: `tcx.const_eval_poly`,
693 /// `tcx.const_eval_resolve`, `tcx.const_eval_instance`, or `tcx.const_eval_global_id`.
694 query const_eval_validated(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
695 -> ConstEvalResult<'tcx> {
697 "const-evaluating + checking `{}`",
698 tcx.def_path_str(key.value.instance.def.def_id())
700 cache_on_disk_if(_, opt_result) {
701 // Only store results without errors
702 opt_result.map_or(true, |r| r.is_ok())
706 /// Destructure a constant ADT or array into its variant index and its
708 query destructure_const(
709 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
710 ) -> mir::DestructuredConst<'tcx> {
711 desc { "destructure constant" }
714 query const_caller_location(key: (rustc_span::Symbol, u32, u32)) -> ConstValue<'tcx> {
715 desc { "get a &core::panic::Location referring to a span" }
719 key: LitToConstInput<'tcx>
720 ) -> Result<&'tcx ty::Const<'tcx>, LitToConstError> {
721 desc { "converting literal to const" }
726 query check_match(key: DefId) {
727 desc { |tcx| "match-checking `{}`", tcx.def_path_str(key) }
728 cache_on_disk_if { key.is_local() }
731 /// Performs part of the privacy check and computes "access levels".
732 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
734 desc { "privacy access levels" }
736 query check_private_in_public(_: CrateNum) -> () {
738 desc { "checking for private elements in public interfaces" }
743 query reachable_set(_: CrateNum) -> FxHashSet<LocalDefId> {
744 storage(ArenaCacheSelector<'tcx>)
745 desc { "reachability" }
748 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
749 /// in the case of closures, this will be redirected to the enclosing function.
750 query region_scope_tree(def_id: DefId) -> &'tcx region::ScopeTree {
751 desc { |tcx| "computing drop scopes for `{}`", tcx.def_path_str(def_id) }
754 query mir_shims(key: ty::InstanceDef<'tcx>) -> mir::Body<'tcx> {
755 storage(ArenaCacheSelector<'tcx>)
756 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
759 /// The `symbol_name` query provides the symbol name for calling a
760 /// given instance from the local crate. In particular, it will also
761 /// look up the correct symbol name of instances from upstream crates.
762 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName<'tcx> {
763 desc { "computing the symbol for `{}`", key }
764 cache_on_disk_if { true }
767 query def_kind(def_id: DefId) -> DefKind {
768 desc { |tcx| "looking up definition kind of `{}`", tcx.def_path_str(def_id) }
770 query def_span(def_id: DefId) -> Span {
771 desc { |tcx| "looking up span for `{}`", tcx.def_path_str(def_id) }
772 // FIXME(mw): DefSpans are not really inputs since they are derived from
773 // HIR. But at the moment HIR hashing still contains some hacks that allow
774 // to make type debuginfo to be source location independent. Declaring
775 // DefSpan an input makes sure that changes to these are always detected
776 // regardless of HIR hashing.
779 query lookup_stability(def_id: DefId) -> Option<&'tcx attr::Stability> {
780 desc { |tcx| "looking up stability of `{}`", tcx.def_path_str(def_id) }
782 query lookup_const_stability(def_id: DefId) -> Option<&'tcx attr::ConstStability> {
783 desc { |tcx| "looking up const stability of `{}`", tcx.def_path_str(def_id) }
785 query lookup_deprecation_entry(def_id: DefId) -> Option<DeprecationEntry> {
786 desc { |tcx| "checking whether `{}` is deprecated", tcx.def_path_str(def_id) }
788 query item_attrs(def_id: DefId) -> &'tcx [ast::Attribute] {
789 desc { |tcx| "collecting attributes of `{}`", tcx.def_path_str(def_id) }
794 query codegen_fn_attrs(def_id: DefId) -> CodegenFnAttrs {
795 desc { |tcx| "computing codegen attributes of `{}`", tcx.def_path_str(def_id) }
796 storage(ArenaCacheSelector<'tcx>)
797 cache_on_disk_if { true }
802 query fn_arg_names(def_id: DefId) -> &'tcx [rustc_span::symbol::Ident] {
803 desc { |tcx| "looking up function parameter names for `{}`", tcx.def_path_str(def_id) }
805 /// Gets the rendered value of the specified constant or associated constant.
807 query rendered_const(def_id: DefId) -> String {
808 desc { |tcx| "rendering constant intializer of `{}`", tcx.def_path_str(def_id) }
810 query impl_parent(def_id: DefId) -> Option<DefId> {
811 desc { |tcx| "computing specialization parent impl of `{}`", tcx.def_path_str(def_id) }
816 query trait_of_item(def_id: DefId) -> Option<DefId> {
817 desc { |tcx| "finding trait defining `{}`", tcx.def_path_str(def_id) }
822 query is_mir_available(key: DefId) -> bool {
823 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
828 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
829 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
830 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
835 query codegen_fulfill_obligation(
836 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
837 ) -> Result<ImplSource<'tcx, ()>, ErrorReported> {
838 cache_on_disk_if { true }
840 "checking if `{}` fulfills its obligations",
841 tcx.def_path_str(key.1.def_id())
847 query all_local_trait_impls(key: CrateNum) -> &'tcx BTreeMap<DefId, Vec<hir::HirId>> {
848 desc { "local trait impls" }
850 query trait_impls_of(key: DefId) -> ty::trait_def::TraitImpls {
851 storage(ArenaCacheSelector<'tcx>)
852 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
854 query specialization_graph_of(key: DefId) -> specialization_graph::Graph {
855 storage(ArenaCacheSelector<'tcx>)
856 desc { |tcx| "building specialization graph of trait `{}`", tcx.def_path_str(key) }
857 cache_on_disk_if { true }
859 query object_safety_violations(key: DefId) -> &'tcx [traits::ObjectSafetyViolation] {
860 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
863 /// Gets the ParameterEnvironment for a given item; this environment
864 /// will be in "user-facing" mode, meaning that it is suitable for
865 /// type-checking etc, and it does not normalize specializable
866 /// associated types. This is almost always what you want,
867 /// unless you are doing MIR optimizations, in which case you
868 query param_env(def_id: DefId) -> ty::ParamEnv<'tcx> {
869 desc { |tcx| "computing normalized predicates of `{}`", tcx.def_path_str(def_id) }
872 /// Like `param_env`, but returns the `ParamEnv in `Reveal::All` mode.
873 /// Prefer this over `tcx.param_env(def_id).with_reveal_all_normalized(tcx)`,
874 /// as this method is more efficient.
875 query param_env_reveal_all_normalized(def_id: DefId) -> ty::ParamEnv<'tcx> {
876 desc { |tcx| "computing revealed normalized predicates of `{}`", tcx.def_path_str(def_id) }
879 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
880 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
881 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
882 desc { "computing whether `{}` is `Copy`", env.value }
884 /// Query backing `TyS::is_sized`.
885 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
886 desc { "computing whether `{}` is `Sized`", env.value }
888 /// Query backing `TyS::is_freeze`.
889 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
890 desc { "computing whether `{}` is freeze", env.value }
892 /// Query backing `TyS::needs_drop`.
893 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
894 desc { "computing whether `{}` needs drop", env.value }
897 /// Query backing `TyS::is_structural_eq_shallow`.
899 /// This is only correct for ADTs. Call `is_structural_eq_shallow` to handle all types
901 query has_structural_eq_impls(ty: Ty<'tcx>) -> bool {
903 "computing whether `{:?}` implements `PartialStructuralEq` and `StructuralEq`",
908 /// A list of types where the ADT requires drop if and only if any of
909 /// those types require drop. If the ADT is known to always need drop
910 /// then `Err(AlwaysRequiresDrop)` is returned.
911 query adt_drop_tys(def_id: DefId) -> Result<&'tcx ty::List<Ty<'tcx>>, AlwaysRequiresDrop> {
912 desc { |tcx| "computing when `{}` needs drop", tcx.def_path_str(def_id) }
913 cache_on_disk_if { true }
917 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
918 ) -> Result<&'tcx rustc_target::abi::Layout, ty::layout::LayoutError<'tcx>> {
919 desc { "computing layout of `{}`", env.value }
924 query dylib_dependency_formats(_: CrateNum)
925 -> &'tcx [(CrateNum, LinkagePreference)] {
926 desc { "dylib dependency formats of crate" }
929 query dependency_formats(_: CrateNum)
930 -> Lrc<crate::middle::dependency_format::Dependencies>
932 desc { "get the linkage format of all dependencies" }
937 query is_compiler_builtins(_: CrateNum) -> bool {
939 desc { "checking if the crate is_compiler_builtins" }
941 query has_global_allocator(_: CrateNum) -> bool {
943 desc { "checking if the crate has_global_allocator" }
945 query has_panic_handler(_: CrateNum) -> bool {
947 desc { "checking if the crate has_panic_handler" }
949 query is_profiler_runtime(_: CrateNum) -> bool {
951 desc { "query a crate is `#![profiler_runtime]`" }
953 query panic_strategy(_: CrateNum) -> PanicStrategy {
955 desc { "query a crate's configured panic strategy" }
957 query is_no_builtins(_: CrateNum) -> bool {
959 desc { "test whether a crate has `#![no_builtins]`" }
961 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
963 desc { "query a crate's symbol mangling version" }
966 query extern_crate(def_id: DefId) -> Option<&'tcx ExternCrate> {
968 desc { "getting crate's ExternCrateData" }
973 query specializes(_: (DefId, DefId)) -> bool {
974 desc { "computing whether impls specialize one another" }
976 query in_scope_traits_map(_: LocalDefId)
977 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
979 desc { "traits in scope at a block" }
984 query module_exports(def_id: LocalDefId) -> Option<&'tcx [Export<LocalDefId>]> {
985 desc { |tcx| "looking up items exported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
991 query impl_defaultness(def_id: DefId) -> hir::Defaultness {
992 desc { |tcx| "looking up whether `{}` is a default impl", tcx.def_path_str(def_id) }
995 query check_item_well_formed(key: LocalDefId) -> () {
996 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
998 query check_trait_item_well_formed(key: LocalDefId) -> () {
999 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1001 query check_impl_item_well_formed(key: LocalDefId) -> () {
1002 desc { |tcx| "checking that `{}` is well-formed", tcx.def_path_str(key.to_def_id()) }
1008 // The `DefId`s of all non-generic functions and statics in the given crate
1009 // that can be reached from outside the crate.
1011 // We expect this items to be available for being linked to.
1013 // This query can also be called for `LOCAL_CRATE`. In this case it will
1014 // compute which items will be reachable to other crates, taking into account
1015 // the kind of crate that is currently compiled. Crates with only a
1016 // C interface have fewer reachable things.
1018 // Does not include external symbols that don't have a corresponding DefId,
1019 // like the compiler-generated `main` function and so on.
1020 query reachable_non_generics(_: CrateNum)
1021 -> DefIdMap<SymbolExportLevel> {
1022 storage(ArenaCacheSelector<'tcx>)
1023 desc { "looking up the exported symbols of a crate" }
1025 query is_reachable_non_generic(def_id: DefId) -> bool {
1026 desc { |tcx| "checking whether `{}` is an exported symbol", tcx.def_path_str(def_id) }
1028 query is_unreachable_local_definition(def_id: DefId) -> bool {
1030 "checking whether `{}` is reachable from outside the crate",
1031 tcx.def_path_str(def_id),
1037 /// The entire set of monomorphizations the local crate can safely link
1038 /// to because they are exported from upstream crates. Do not depend on
1039 /// this directly, as its value changes anytime a monomorphization gets
1040 /// added or removed in any upstream crate. Instead use the narrower
1041 /// `upstream_monomorphizations_for`, `upstream_drop_glue_for`, or, even
1042 /// better, `Instance::upstream_monomorphization()`.
1043 query upstream_monomorphizations(
1045 ) -> DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
1046 storage(ArenaCacheSelector<'tcx>)
1047 desc { "collecting available upstream monomorphizations `{:?}`", k }
1050 /// Returns the set of upstream monomorphizations available for the
1051 /// generic function identified by the given `def_id`. The query makes
1052 /// sure to make a stable selection if the same monomorphization is
1053 /// available in multiple upstream crates.
1055 /// You likely want to call `Instance::upstream_monomorphization()`
1056 /// instead of invoking this query directly.
1057 query upstream_monomorphizations_for(def_id: DefId)
1058 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {
1060 "collecting available upstream monomorphizations for `{}`",
1061 tcx.def_path_str(def_id),
1065 /// Returns the upstream crate that exports drop-glue for the given
1066 /// type (`substs` is expected to be a single-item list containing the
1067 /// type one wants drop-glue for).
1069 /// This is a subset of `upstream_monomorphizations_for` in order to
1070 /// increase dep-tracking granularity. Otherwise adding or removing any
1071 /// type with drop-glue in any upstream crate would invalidate all
1072 /// functions calling drop-glue of an upstream type.
1074 /// You likely want to call `Instance::upstream_monomorphization()`
1075 /// instead of invoking this query directly.
1077 /// NOTE: This query could easily be extended to also support other
1078 /// common functions that have are large set of monomorphizations
1079 /// (like `Clone::clone` for example).
1080 query upstream_drop_glue_for(substs: SubstsRef<'tcx>) -> Option<CrateNum> {
1081 desc { "available upstream drop-glue for `{:?}`", substs }
1086 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
1087 desc { "looking up the foreign modules of a linked crate" }
1090 /// Identifies the entry-point (e.g., the `main` function) for a given
1091 /// crate, returning `None` if there is no entry point (such as for library crates).
1092 query entry_fn(_: CrateNum) -> Option<(LocalDefId, EntryFnType)> {
1093 desc { "looking up the entry function of a crate" }
1095 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
1096 desc { "looking up the plugin registrar for a crate" }
1098 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
1099 desc { "looking up the derive registrar for a crate" }
1101 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
1103 desc { "looking up the disambiguator a crate" }
1105 query crate_hash(_: CrateNum) -> Svh {
1107 desc { "looking up the hash a crate" }
1109 query crate_host_hash(_: CrateNum) -> Option<Svh> {
1111 desc { "looking up the hash of a host version of a crate" }
1113 query original_crate_name(_: CrateNum) -> Symbol {
1115 desc { "looking up the original name a crate" }
1117 query extra_filename(_: CrateNum) -> String {
1119 desc { "looking up the extra filename for a crate" }
1121 query crate_extern_paths(_: CrateNum) -> Vec<PathBuf> {
1123 desc { "looking up the paths for extern crates" }
1128 query implementations_of_trait(_: (CrateNum, DefId))
1129 -> &'tcx [(DefId, Option<ty::fast_reject::SimplifiedType>)] {
1130 desc { "looking up implementations of a trait in a crate" }
1132 query all_trait_implementations(_: CrateNum)
1133 -> &'tcx [(DefId, Option<ty::fast_reject::SimplifiedType>)] {
1134 desc { "looking up all (?) trait implementations" }
1139 query dllimport_foreign_items(_: CrateNum)
1140 -> FxHashSet<DefId> {
1141 storage(ArenaCacheSelector<'tcx>)
1142 desc { "dllimport_foreign_items" }
1144 query is_dllimport_foreign_item(def_id: DefId) -> bool {
1145 desc { |tcx| "is_dllimport_foreign_item({})", tcx.def_path_str(def_id) }
1147 query is_statically_included_foreign_item(def_id: DefId) -> bool {
1148 desc { |tcx| "is_statically_included_foreign_item({})", tcx.def_path_str(def_id) }
1150 query native_library_kind(def_id: DefId)
1151 -> Option<NativeLibKind> {
1152 desc { |tcx| "native_library_kind({})", tcx.def_path_str(def_id) }
1157 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
1159 desc { "looking up link arguments for a crate" }
1164 /// Lifetime resolution. See `middle::resolve_lifetimes`.
1165 query resolve_lifetimes(_: CrateNum) -> ResolveLifetimes {
1166 storage(ArenaCacheSelector<'tcx>)
1167 desc { "resolving lifetimes" }
1169 query named_region_map(_: LocalDefId) ->
1170 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
1171 desc { "looking up a named region" }
1173 query is_late_bound_map(_: LocalDefId) ->
1174 Option<&'tcx FxHashSet<ItemLocalId>> {
1175 desc { "testing if a region is late bound" }
1177 query object_lifetime_defaults_map(_: LocalDefId)
1178 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
1179 desc { "looking up lifetime defaults for a region" }
1184 query visibility(def_id: DefId) -> ty::Visibility {
1185 desc { |tcx| "computing visibility of `{}`", tcx.def_path_str(def_id) }
1190 query dep_kind(_: CrateNum) -> CrateDepKind {
1192 desc { "fetching what a dependency looks like" }
1194 query crate_name(_: CrateNum) -> Symbol {
1196 desc { "fetching what a crate is named" }
1198 query item_children(def_id: DefId) -> &'tcx [Export<hir::HirId>] {
1199 desc { |tcx| "collecting child items of `{}`", tcx.def_path_str(def_id) }
1201 query extern_mod_stmt_cnum(def_id: LocalDefId) -> Option<CrateNum> {
1202 desc { |tcx| "computing crate imported by `{}`", tcx.def_path_str(def_id.to_def_id()) }
1205 query get_lib_features(_: CrateNum) -> LibFeatures {
1206 storage(ArenaCacheSelector<'tcx>)
1208 desc { "calculating the lib features map" }
1210 query defined_lib_features(_: CrateNum)
1211 -> &'tcx [(Symbol, Option<Symbol>)] {
1212 desc { "calculating the lib features defined in a crate" }
1214 /// Returns the lang items defined in another crate by loading it from metadata.
1215 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
1216 // of that argument?
1217 query get_lang_items(_: CrateNum) -> LanguageItems {
1218 storage(ArenaCacheSelector<'tcx>)
1220 desc { "calculating the lang items map" }
1223 /// Returns all diagnostic items defined in all crates.
1224 query all_diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1225 storage(ArenaCacheSelector<'tcx>)
1227 desc { "calculating the diagnostic items map" }
1230 /// Returns the lang items defined in another crate by loading it from metadata.
1231 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
1232 desc { "calculating the lang items defined in a crate" }
1235 /// Returns the diagnostic items defined in a crate.
1236 query diagnostic_items(_: CrateNum) -> FxHashMap<Symbol, DefId> {
1237 storage(ArenaCacheSelector<'tcx>)
1238 desc { "calculating the diagnostic items map in a crate" }
1241 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
1242 desc { "calculating the missing lang items in a crate" }
1244 query visible_parent_map(_: CrateNum)
1245 -> DefIdMap<DefId> {
1246 storage(ArenaCacheSelector<'tcx>)
1247 desc { "calculating the visible parent map" }
1249 query missing_extern_crate_item(_: CrateNum) -> bool {
1251 desc { "seeing if we're missing an `extern crate` item for this crate" }
1253 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
1255 desc { "looking at the source for a crate" }
1257 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
1259 desc { "generating a postorder list of CrateNums" }
1262 query upvars_mentioned(def_id: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
1263 desc { |tcx| "collecting upvars mentioned in `{}`", tcx.def_path_str(def_id) }
1266 query maybe_unused_trait_import(def_id: LocalDefId) -> bool {
1268 desc { |tcx| "maybe_unused_trait_import for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1270 query maybe_unused_extern_crates(_: CrateNum)
1271 -> &'tcx [(LocalDefId, Span)] {
1273 desc { "looking up all possibly unused extern crates" }
1275 query names_imported_by_glob_use(def_id: LocalDefId)
1276 -> &'tcx FxHashSet<Symbol> {
1278 desc { |tcx| "names_imported_by_glob_use for `{}`", tcx.def_path_str(def_id.to_def_id()) }
1281 query stability_index(_: CrateNum) -> stability::Index<'tcx> {
1282 storage(ArenaCacheSelector<'tcx>)
1284 desc { "calculating the stability index for the local crate" }
1286 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
1288 desc { "fetching all foreign CrateNum instances" }
1291 /// A vector of every trait accessible in the whole crate
1292 /// (i.e., including those from subcrates). This is used only for
1293 /// error reporting.
1294 query all_traits(_: CrateNum) -> &'tcx [DefId] {
1295 desc { "fetching all foreign and local traits" }
1300 /// The list of symbols exported from the given crate.
1302 /// - All names contained in `exported_symbols(cnum)` are guaranteed to
1303 /// correspond to a publicly visible symbol in `cnum` machine code.
1304 /// - The `exported_symbols` sets of different crates do not intersect.
1305 query exported_symbols(_: CrateNum)
1306 -> &'tcx [(ExportedSymbol<'tcx>, SymbolExportLevel)] {
1307 desc { "exported_symbols" }
1312 query collect_and_partition_mono_items(_: CrateNum)
1313 -> (&'tcx DefIdSet, &'tcx [CodegenUnit<'tcx>]) {
1315 desc { "collect_and_partition_mono_items" }
1317 query is_codegened_item(def_id: DefId) -> bool {
1318 desc { |tcx| "determining whether `{}` needs codegen", tcx.def_path_str(def_id) }
1320 query codegen_unit(_: Symbol) -> &'tcx CodegenUnit<'tcx> {
1321 desc { "codegen_unit" }
1323 query unused_generic_params(key: DefId) -> FiniteBitSet<u32> {
1324 cache_on_disk_if { key.is_local() }
1326 |tcx| "determining which generic parameters are unused by `{}`",
1327 tcx.def_path_str(key)
1330 query backend_optimization_level(_: CrateNum) -> OptLevel {
1331 desc { "optimization level used by backend" }
1336 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
1338 desc { "output_filenames" }
1343 /// Do not call this query directly: invoke `normalize` instead.
1344 query normalize_projection_ty(
1345 goal: CanonicalProjectionGoal<'tcx>
1347 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
1350 desc { "normalizing `{:?}`", goal }
1353 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
1354 query normalize_generic_arg_after_erasing_regions(
1355 goal: ParamEnvAnd<'tcx, GenericArg<'tcx>>
1356 ) -> GenericArg<'tcx> {
1357 desc { "normalizing `{}`", goal.value }
1360 query implied_outlives_bounds(
1361 goal: CanonicalTyGoal<'tcx>
1363 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
1366 desc { "computing implied outlives bounds for `{:?}`", goal }
1369 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
1370 query dropck_outlives(
1371 goal: CanonicalTyGoal<'tcx>
1373 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1376 desc { "computing dropck types for `{:?}`", goal }
1379 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1380 /// `infcx.predicate_must_hold()` instead.
1381 query evaluate_obligation(
1382 goal: CanonicalPredicateGoal<'tcx>
1383 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1384 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1387 query evaluate_goal(
1388 goal: traits::ChalkCanonicalGoal<'tcx>
1390 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1393 desc { "evaluating trait selection obligation `{}`", goal.value }
1396 query type_implements_trait(
1397 key: (DefId, Ty<'tcx>, SubstsRef<'tcx>, ty::ParamEnv<'tcx>, )
1399 desc { "evaluating `type_implements_trait` `{:?}`", key }
1402 /// Do not call this query directly: part of the `Eq` type-op
1403 query type_op_ascribe_user_type(
1404 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1406 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1409 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1412 /// Do not call this query directly: part of the `Eq` type-op
1414 goal: CanonicalTypeOpEqGoal<'tcx>
1416 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1419 desc { "evaluating `type_op_eq` `{:?}`", goal }
1422 /// Do not call this query directly: part of the `Subtype` type-op
1423 query type_op_subtype(
1424 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1426 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1429 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1432 /// Do not call this query directly: part of the `ProvePredicate` type-op
1433 query type_op_prove_predicate(
1434 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1436 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1439 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1442 /// Do not call this query directly: part of the `Normalize` type-op
1443 query type_op_normalize_ty(
1444 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1446 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1449 desc { "normalizing `{:?}`", goal }
1452 /// Do not call this query directly: part of the `Normalize` type-op
1453 query type_op_normalize_predicate(
1454 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1456 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1459 desc { "normalizing `{:?}`", goal }
1462 /// Do not call this query directly: part of the `Normalize` type-op
1463 query type_op_normalize_poly_fn_sig(
1464 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1466 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1469 desc { "normalizing `{:?}`", goal }
1472 /// Do not call this query directly: part of the `Normalize` type-op
1473 query type_op_normalize_fn_sig(
1474 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1476 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1479 desc { "normalizing `{:?}`", goal }
1482 query subst_and_check_impossible_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1484 "impossible substituted predicates:`{}`",
1485 tcx.def_path_str(key.0)
1489 query method_autoderef_steps(
1490 goal: CanonicalTyGoal<'tcx>
1491 ) -> MethodAutoderefStepsResult<'tcx> {
1492 desc { "computing autoderef types for `{:?}`", goal }
1497 query supported_target_features(_: CrateNum) -> FxHashMap<String, Option<Symbol>> {
1498 storage(ArenaCacheSelector<'tcx>)
1500 desc { "looking up supported target features" }
1503 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1504 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1506 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1509 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1511 desc { "looking up enabled feature gates" }
1514 /// Attempt to resolve the given `DefId` to an `Instance`, for the
1515 /// given generics args (`SubstsRef`), returning one of:
1516 /// * `Ok(Some(instance))` on success
1517 /// * `Ok(None)` when the `SubstsRef` are still too generic,
1518 /// and therefore don't allow finding the final `Instance`
1519 /// * `Err(ErrorReported)` when the `Instance` resolution process
1520 /// couldn't complete due to errors elsewhere - this is distinct
1521 /// from `Ok(None)` to avoid misleading diagnostics when an error
1522 /// has already been/will be emitted, for the original cause
1523 query resolve_instance(
1524 key: ty::ParamEnvAnd<'tcx, (DefId, SubstsRef<'tcx>)>
1525 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1526 desc { "resolving instance `{}`", ty::Instance::new(key.value.0, key.value.1) }
1529 query resolve_instance_of_const_arg(
1530 key: ty::ParamEnvAnd<'tcx, (LocalDefId, DefId, SubstsRef<'tcx>)>
1531 ) -> Result<Option<ty::Instance<'tcx>>, ErrorReported> {
1533 "resolving instance of the const argument `{}`",
1534 ty::Instance::new(key.value.0.to_def_id(), key.value.2),
1538 query normalize_opaque_types(key: &'tcx ty::List<ty::Predicate<'tcx>>) -> &'tcx ty::List<ty::Predicate<'tcx>> {
1539 desc { "normalizing opaque types in {:?}", key }