1 use crate::dep_graph::{DepKind, DepNode, RecoverKey, SerializedDepNodeIndex};
3 use crate::mir::interpret::{GlobalId, LitToConstInput};
5 use crate::traits::query::{
6 CanonicalPredicateGoal, CanonicalProjectionGoal, CanonicalTyGoal,
7 CanonicalTypeOpAscribeUserTypeGoal, CanonicalTypeOpEqGoal, CanonicalTypeOpNormalizeGoal,
8 CanonicalTypeOpProvePredicateGoal, CanonicalTypeOpSubtypeGoal,
10 use crate::ty::query::queries;
11 use crate::ty::query::QueryDescription;
12 use crate::ty::subst::SubstsRef;
13 use crate::ty::{self, ParamEnvAnd, Ty, TyCtxt};
14 use rustc_hir::def_id::{CrateNum, DefId, DefIndex};
16 use rustc_span::symbol::Symbol;
19 fn describe_as_module(def_id: DefId, tcx: TyCtxt<'_>) -> String {
20 if def_id.is_top_level_module() {
21 format!("top-level module")
23 format!("module `{}`", tcx.def_path_str(def_id))
27 // Each of these queries corresponds to a function pointer field in the
28 // `Providers` struct for requesting a value of that type, and a method
29 // on `tcx: TyCtxt` (and `tcx.at(span)`) for doing that request in a way
30 // which memoizes and does dep-graph tracking, wrapping around the actual
31 // `Providers` that the driver creates (using several `rustc_*` crates).
33 // The result type of each query must implement `Clone`, and additionally
34 // `ty::query::values::Value`, which produces an appropriate placeholder
35 // (error) value if the query resulted in a query cycle.
36 // Queries marked with `fatal_cycle` do not need the latter implementation,
37 // as they will raise an fatal error on query cycles instead.
40 query trigger_delay_span_bug(key: DefId) -> () {
41 desc { "trigger a delay span bug" }
46 // Represents crate as a whole (as distinct from the to-level crate module).
47 // If you call `hir_crate` (e.g., indirectly by calling `tcx.hir().krate()`),
48 // we will have to assume that any change means that you need to be recompiled.
49 // This is because the `hir_crate` query gives you access to all other items.
50 // To avoid this fate, do not call `tcx.hir().krate()`; instead,
51 // prefer wrappers like `tcx.visit_all_items_in_krate()`.
52 query hir_crate(key: CrateNum) -> &'tcx Crate<'tcx> {
55 desc { "get the crate HIR" }
58 /// Records the type of every item.
59 query type_of(key: DefId) -> Ty<'tcx> {
60 cache_on_disk_if { key.is_local() }
63 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to its
64 /// associated generics.
65 query generics_of(key: DefId) -> &'tcx ty::Generics {
66 cache_on_disk_if { key.is_local() }
67 load_cached(tcx, id) {
68 let generics: Option<ty::Generics> = tcx.queries.on_disk_cache
69 .try_load_query_result(tcx, id);
70 generics.map(|x| &*tcx.arena.alloc(x))
74 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
75 /// predicates (where-clauses) that must be proven true in order
76 /// to reference it. This is almost always the "predicates query"
79 /// `predicates_of` builds on `predicates_defined_on` -- in fact,
80 /// it is almost always the same as that query, except for the
81 /// case of traits. For traits, `predicates_of` contains
82 /// an additional `Self: Trait<...>` predicate that users don't
83 /// actually write. This reflects the fact that to invoke the
84 /// trait (e.g., via `Default::default`) you must supply types
85 /// that actually implement the trait. (However, this extra
86 /// predicate gets in the way of some checks, which are intended
87 /// to operate over only the actual where-clauses written by the
89 query predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
90 cache_on_disk_if { key.is_local() }
93 query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLibrary>> {
94 desc { "looking up the native libraries of a linked crate" }
97 query lint_levels(_: CrateNum) -> &'tcx LintLevelMap {
99 desc { "computing the lint levels for items in this crate" }
104 query is_panic_runtime(_: CrateNum) -> bool {
106 desc { "checking if the crate is_panic_runtime" }
111 /// Set of all the `DefId`s in this crate that have MIR associated with
112 /// them. This includes all the body owners, but also things like struct
114 query mir_keys(_: CrateNum) -> &'tcx DefIdSet {
115 desc { "getting a list of all mir_keys" }
118 /// Maps DefId's that have an associated `mir::Body` to the result
119 /// of the MIR const-checking pass. This is the set of qualifs in
120 /// the final value of a `const`.
121 query mir_const_qualif(key: DefId) -> mir::ConstQualifs {
122 desc { |tcx| "const checking `{}`", tcx.def_path_str(key) }
123 cache_on_disk_if { key.is_local() }
126 /// Fetch the MIR for a given `DefId` right after it's built - this includes
127 /// unreachable code.
128 query mir_built(_: DefId) -> &'tcx Steal<mir::BodyAndCache<'tcx>> {}
130 /// Fetch the MIR for a given `DefId` up till the point where it is
131 /// ready for const evaluation.
133 /// See the README for the `mir` module for details.
134 query mir_const(_: DefId) -> &'tcx Steal<mir::BodyAndCache<'tcx>> {
138 query mir_validated(_: DefId) ->
140 &'tcx Steal<mir::BodyAndCache<'tcx>>,
141 &'tcx Steal<IndexVec<mir::Promoted, mir::BodyAndCache<'tcx>>>
146 /// MIR after our optimization passes have run. This is MIR that is ready
147 /// for codegen. This is also the only query that can fetch non-local MIR, at present.
148 query optimized_mir(key: DefId) -> &'tcx mir::BodyAndCache<'tcx> {
149 cache_on_disk_if { key.is_local() }
150 load_cached(tcx, id) {
151 let mir: Option<crate::mir::BodyAndCache<'tcx>>
152 = tcx.queries.on_disk_cache.try_load_query_result(tcx, id);
154 let cache = tcx.arena.alloc(x);
155 cache.ensure_predecessors();
161 query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::BodyAndCache<'tcx>> {
162 cache_on_disk_if { key.is_local() }
163 load_cached(tcx, id) {
164 let promoted: Option<
165 rustc_index::vec::IndexVec<
166 crate::mir::Promoted,
167 crate::mir::BodyAndCache<'tcx>
168 >> = tcx.queries.on_disk_cache.try_load_query_result(tcx, id);
170 let cache = tcx.arena.alloc(p);
171 for body in cache.iter_mut() {
172 body.ensure_predecessors();
181 // Erases regions from `ty` to yield a new type.
182 // Normally you would just use `tcx.erase_regions(&value)`,
183 // however, which uses this query as a kind of cache.
184 query erase_regions_ty(ty: Ty<'tcx>) -> Ty<'tcx> {
185 // This query is not expected to have input -- as a result, it
186 // is not a good candidates for "replay" because it is essentially a
187 // pure function of its input (and hence the expectation is that
188 // no caller would be green **apart** from just these
189 // queries). Making it anonymous avoids hashing the result, which
190 // may save a bit of time.
193 desc { "erasing regions from `{:?}`", ty }
196 query program_clauses_for(_: DefId) -> Clauses<'tcx> {
197 desc { "generating chalk-style clauses" }
200 query program_clauses_for_env(_: traits::Environment<'tcx>) -> Clauses<'tcx> {
202 desc { "generating chalk-style clauses for environment" }
205 // Get the chalk-style environment of the given item.
206 query environment(_: DefId) -> traits::Environment<'tcx> {
207 desc { "return a chalk-style environment" }
212 query wasm_import_module_map(_: CrateNum) -> &'tcx FxHashMap<DefId, String> {
213 desc { "wasm import module map" }
218 /// Maps from the `DefId` of an item (trait/struct/enum/fn) to the
219 /// predicates (where-clauses) directly defined on it. This is
220 /// equal to the `explicit_predicates_of` predicates plus the
221 /// `inferred_outlives_of` predicates.
222 query predicates_defined_on(_: DefId) -> ty::GenericPredicates<'tcx> {}
224 /// Returns the predicates written explicitly by the user.
225 query explicit_predicates_of(_: DefId) -> ty::GenericPredicates<'tcx> {}
227 /// Returns the inferred outlives predicates (e.g., for `struct
228 /// Foo<'a, T> { x: &'a T }`, this would return `T: 'a`).
229 query inferred_outlives_of(_: DefId) -> &'tcx [(ty::Predicate<'tcx>, Span)] {}
231 /// Maps from the `DefId` of a trait to the list of
232 /// super-predicates. This is a subset of the full list of
233 /// predicates. We store these in a separate map because we must
234 /// evaluate them even during type conversion, often before the
235 /// full predicates are available (note that supertraits have
236 /// additional acyclicity requirements).
237 query super_predicates_of(key: DefId) -> ty::GenericPredicates<'tcx> {
238 desc { |tcx| "computing the supertraits of `{}`", tcx.def_path_str(key) }
241 /// To avoid cycles within the predicates of a single item we compute
242 /// per-type-parameter predicates for resolving `T::AssocTy`.
243 query type_param_predicates(key: (DefId, DefId)) -> ty::GenericPredicates<'tcx> {
245 desc { |tcx| "computing the bounds for type parameter `{}`", {
246 let id = tcx.hir().as_local_hir_id(key.1).unwrap();
247 tcx.hir().ty_param_name(id)
251 query trait_def(_: DefId) -> &'tcx ty::TraitDef {}
252 query adt_def(_: DefId) -> &'tcx ty::AdtDef {}
253 query adt_destructor(_: DefId) -> Option<ty::Destructor> {}
255 // The cycle error here should be reported as an error by `check_representable`.
256 // We consider the type as Sized in the meanwhile to avoid
257 // further errors (done in impl Value for AdtSizedConstraint).
258 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
259 // in case we accidentally otherwise don't emit an error.
260 query adt_sized_constraint(
262 ) -> AdtSizedConstraint<'tcx> {
266 query adt_dtorck_constraint(
268 ) -> Result<DtorckConstraint<'tcx>, NoSolution> {}
270 /// Returns `true` if this is a const fn, use the `is_const_fn` to know whether your crate
271 /// actually sees it as const fn (e.g., the const-fn-ness might be unstable and you might
272 /// not have the feature gate active).
274 /// **Do not call this function manually.** It is only meant to cache the base data for the
275 /// `is_const_fn` function.
276 query is_const_fn_raw(key: DefId) -> bool {
277 desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
280 query asyncness(key: DefId) -> hir::IsAsync {
281 desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
284 /// Returns `true` if calls to the function may be promoted.
286 /// This is either because the function is e.g., a tuple-struct or tuple-variant
287 /// constructor, or because it has the `#[rustc_promotable]` attribute. The attribute should
288 /// be removed in the future in favour of some form of check which figures out whether the
289 /// function does not inspect the bits of any of its arguments (so is essentially just a
290 /// constructor function).
291 query is_promotable_const_fn(_: DefId) -> bool {}
293 query const_fn_is_allowed_fn_ptr(_: DefId) -> bool {}
295 /// Returns `true` if this is a foreign item (i.e., linked via `extern { ... }`).
296 query is_foreign_item(_: DefId) -> bool {}
298 /// Returns `Some(mutability)` if the node pointed to by `def_id` is a static item.
299 query static_mutability(_: DefId) -> Option<hir::Mutability> {}
301 /// Gets a map with the variance of every item; use `item_variance` instead.
302 query crate_variances(_: CrateNum) -> &'tcx ty::CrateVariancesMap<'tcx> {
303 desc { "computing the variances for items in this crate" }
306 /// Maps from the `DefId` of a type or region parameter to its (inferred) variance.
307 query variances_of(_: DefId) -> &'tcx [ty::Variance] {}
311 /// Maps from thee `DefId` of a type to its (inferred) outlives.
312 query inferred_outlives_crate(_: CrateNum)
313 -> &'tcx ty::CratePredicatesMap<'tcx> {
314 desc { "computing the inferred outlives predicates for items in this crate" }
319 /// Maps from an impl/trait `DefId to a list of the `DefId`s of its items.
320 query associated_item_def_ids(_: DefId) -> &'tcx [DefId] {}
322 /// Maps from a trait item to the trait item "descriptor".
323 query associated_item(_: DefId) -> ty::AssocItem {}
325 query impl_trait_ref(_: DefId) -> Option<ty::TraitRef<'tcx>> {}
326 query impl_polarity(_: DefId) -> ty::ImplPolarity {}
328 query issue33140_self_ty(_: DefId) -> Option<ty::Ty<'tcx>> {}
332 /// Maps a `DefId` of a type to a list of its inherent impls.
333 /// Contains implementations of methods that are inherent to a type.
334 /// Methods in these implementations don't need to be exported.
335 query inherent_impls(_: DefId) -> &'tcx [DefId] {
341 /// The result of unsafety-checking this `DefId`.
342 query unsafety_check_result(key: DefId) -> mir::UnsafetyCheckResult {
343 cache_on_disk_if { key.is_local() }
346 /// HACK: when evaluated, this reports a "unsafe derive on repr(packed)" error
347 query unsafe_derive_on_repr_packed(_: DefId) -> () {}
349 /// The signature of functions and closures.
350 query fn_sig(_: DefId) -> ty::PolyFnSig<'tcx> {}
354 query lint_mod(key: DefId) -> () {
355 desc { |tcx| "linting {}", describe_as_module(key, tcx) }
358 /// Checks the attributes in the module.
359 query check_mod_attrs(key: DefId) -> () {
360 desc { |tcx| "checking attributes in {}", describe_as_module(key, tcx) }
363 query check_mod_unstable_api_usage(key: DefId) -> () {
364 desc { |tcx| "checking for unstable API usage in {}", describe_as_module(key, tcx) }
367 /// Checks the const bodies in the module for illegal operations (e.g. `if` or `loop`).
368 query check_mod_const_bodies(key: DefId) -> () {
369 desc { |tcx| "checking consts in {}", describe_as_module(key, tcx) }
372 /// Checks the loops in the module.
373 query check_mod_loops(key: DefId) -> () {
374 desc { |tcx| "checking loops in {}", describe_as_module(key, tcx) }
377 query check_mod_item_types(key: DefId) -> () {
378 desc { |tcx| "checking item types in {}", describe_as_module(key, tcx) }
381 query check_mod_privacy(key: DefId) -> () {
382 desc { |tcx| "checking privacy in {}", describe_as_module(key, tcx) }
385 query check_mod_intrinsics(key: DefId) -> () {
386 desc { |tcx| "checking intrinsics in {}", describe_as_module(key, tcx) }
389 query check_mod_liveness(key: DefId) -> () {
390 desc { |tcx| "checking liveness of variables in {}", describe_as_module(key, tcx) }
393 query check_mod_impl_wf(key: DefId) -> () {
394 desc { |tcx| "checking that impls are well-formed in {}", describe_as_module(key, tcx) }
397 query collect_mod_item_types(key: DefId) -> () {
398 desc { |tcx| "collecting item types in {}", describe_as_module(key, tcx) }
401 /// Caches `CoerceUnsized` kinds for impls on custom types.
402 query coerce_unsized_info(_: DefId)
403 -> ty::adjustment::CoerceUnsizedInfo {}
407 query typeck_item_bodies(_: CrateNum) -> () {
408 desc { "type-checking all item bodies" }
411 query typeck_tables_of(key: DefId) -> &'tcx ty::TypeckTables<'tcx> {
412 cache_on_disk_if { key.is_local() }
413 load_cached(tcx, id) {
414 let typeck_tables: Option<ty::TypeckTables<'tcx>> = tcx
415 .queries.on_disk_cache
416 .try_load_query_result(tcx, id);
418 typeck_tables.map(|tables| &*tcx.arena.alloc(tables))
421 query diagnostic_only_typeck_tables_of(key: DefId) -> &'tcx ty::TypeckTables<'tcx> {
422 cache_on_disk_if { key.is_local() }
423 load_cached(tcx, id) {
424 let typeck_tables: Option<ty::TypeckTables<'tcx>> = tcx
425 .queries.on_disk_cache
426 .try_load_query_result(tcx, id);
428 typeck_tables.map(|tables| &*tcx.arena.alloc(tables))
434 query used_trait_imports(key: DefId) -> &'tcx DefIdSet {
435 cache_on_disk_if { key.is_local() }
440 query has_typeck_tables(_: DefId) -> bool {}
442 query coherent_trait(def_id: DefId) -> () {
443 desc { |tcx| "coherence checking all impls of trait `{}`", tcx.def_path_str(def_id) }
448 /// Borrow-checks the function body. If this is a closure, returns
449 /// additional requirements that the closure's creator must verify.
450 query mir_borrowck(key: DefId) -> mir::BorrowCheckResult<'tcx> {
451 cache_on_disk_if(tcx, _) { key.is_local() && tcx.is_closure(key) }
456 /// Gets a complete map from all types to their inherent impls.
457 /// Not meant to be used directly outside of coherence.
458 /// (Defined only for `LOCAL_CRATE`.)
459 query crate_inherent_impls(k: CrateNum)
460 -> &'tcx CrateInherentImpls {
462 desc { "all inherent impls defined in crate `{:?}`", k }
465 /// Checks all types in the crate for overlap in their inherent impls. Reports errors.
466 /// Not meant to be used directly outside of coherence.
467 /// (Defined only for `LOCAL_CRATE`.)
468 query crate_inherent_impls_overlap_check(_: CrateNum)
471 desc { "check for overlap between inherent impls defined in this crate" }
476 /// Evaluates a constant without running sanity checks.
478 /// **Do not use this** outside const eval. Const eval uses this to break query cycles
479 /// during validation. Please add a comment to every use site explaining why using
480 /// `const_eval_validated` isn't sufficient. The returned constant also isn't in a suitable
481 /// form to be used outside of const eval.
482 query const_eval_raw(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
483 -> ConstEvalRawResult<'tcx> {
486 "const-evaluating `{}`",
487 tcx.def_path_str(key.value.instance.def.def_id())
491 /// Results of evaluating const items or constants embedded in
492 /// other items (such as enum variant explicit discriminants).
494 /// In contrast to `const_eval_raw` this performs some validation on the constant, and
495 /// returns a proper constant that is usable by the rest of the compiler.
497 /// **Do not use this** directly, use one of the following wrappers: `tcx.const_eval_poly`,
498 /// `tcx.const_eval_resolve`, `tcx.const_eval_instance`, or `tcx.const_eval_promoted`.
499 query const_eval_validated(key: ty::ParamEnvAnd<'tcx, GlobalId<'tcx>>)
500 -> ConstEvalResult<'tcx> {
503 "const-evaluating + checking `{}`",
504 tcx.def_path_str(key.value.instance.def.def_id())
506 cache_on_disk_if(_, opt_result) {
507 // Only store results without errors
508 opt_result.map_or(true, |r| r.is_ok())
512 /// Extracts a field of a (variant of a) const.
514 key: ty::ParamEnvAnd<'tcx, (&'tcx ty::Const<'tcx>, mir::Field)>
515 ) -> &'tcx ty::Const<'tcx> {
517 desc { "extract field of const" }
520 /// Destructure a constant ADT or array into its variant indent and its
522 query destructure_const(
523 key: ty::ParamEnvAnd<'tcx, &'tcx ty::Const<'tcx>>
524 ) -> mir::DestructuredConst<'tcx> {
526 desc { "destructure constant" }
529 query const_caller_location(key: (rustc_span::Symbol, u32, u32)) -> &'tcx ty::Const<'tcx> {
531 desc { "get a &core::panic::Location referring to a span" }
535 key: LitToConstInput<'tcx>
536 ) -> Result<&'tcx ty::Const<'tcx>, LitToConstError> {
538 desc { "converting literal to const" }
543 query check_match(key: DefId) {
544 cache_on_disk_if { key.is_local() }
547 /// Performs part of the privacy check and computes "access levels".
548 query privacy_access_levels(_: CrateNum) -> &'tcx AccessLevels {
550 desc { "privacy access levels" }
552 query check_private_in_public(_: CrateNum) -> () {
554 desc { "checking for private elements in public interfaces" }
559 query reachable_set(_: CrateNum) -> Lrc<HirIdSet> {
560 desc { "reachability" }
563 /// Per-body `region::ScopeTree`. The `DefId` should be the owner `DefId` for the body;
564 /// in the case of closures, this will be redirected to the enclosing function.
565 query region_scope_tree(_: DefId) -> &'tcx region::ScopeTree {}
567 query mir_shims(key: ty::InstanceDef<'tcx>) -> &'tcx mir::BodyAndCache<'tcx> {
569 desc { |tcx| "generating MIR shim for `{}`", tcx.def_path_str(key.def_id()) }
572 /// The `symbol_name` query provides the symbol name for calling a
573 /// given instance from the local crate. In particular, it will also
574 /// look up the correct symbol name of instances from upstream crates.
575 query symbol_name(key: ty::Instance<'tcx>) -> ty::SymbolName {
577 desc { "computing the symbol for `{}`", key }
578 cache_on_disk_if { true }
581 query def_kind(_: DefId) -> Option<DefKind> {}
582 query def_span(_: DefId) -> Span {
583 // FIXME(mw): DefSpans are not really inputs since they are derived from
584 // HIR. But at the moment HIR hashing still contains some hacks that allow
585 // to make type debuginfo to be source location independent. Declaring
586 // DefSpan an input makes sure that changes to these are always detected
587 // regardless of HIR hashing.
590 query lookup_stability(_: DefId) -> Option<&'tcx attr::Stability> {}
591 query lookup_const_stability(_: DefId) -> Option<&'tcx attr::ConstStability> {}
592 query lookup_deprecation_entry(_: DefId) -> Option<DeprecationEntry> {}
593 query item_attrs(_: DefId) -> Lrc<[ast::Attribute]> {}
597 query codegen_fn_attrs(_: DefId) -> CodegenFnAttrs {
598 cache_on_disk_if { true }
603 query fn_arg_names(_: DefId) -> Vec<ast::Name> {}
604 /// Gets the rendered value of the specified constant or associated constant.
606 query rendered_const(_: DefId) -> String {}
607 query impl_parent(_: DefId) -> Option<DefId> {}
611 query trait_of_item(_: DefId) -> Option<DefId> {}
615 query is_mir_available(key: DefId) -> bool {
616 desc { |tcx| "checking if item has mir available: `{}`", tcx.def_path_str(key) }
621 query vtable_methods(key: ty::PolyTraitRef<'tcx>)
622 -> &'tcx [Option<(DefId, SubstsRef<'tcx>)>] {
624 desc { |tcx| "finding all methods for trait {}", tcx.def_path_str(key.def_id()) }
629 query codegen_fulfill_obligation(
630 key: (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>)
631 ) -> Vtable<'tcx, ()> {
633 cache_on_disk_if { true }
635 "checking if `{}` fulfills its obligations",
636 tcx.def_path_str(key.1.def_id())
642 query trait_impls_of(key: DefId) -> &'tcx ty::trait_def::TraitImpls {
643 desc { |tcx| "trait impls of `{}`", tcx.def_path_str(key) }
645 query specialization_graph_of(_: DefId) -> &'tcx specialization_graph::Graph {
646 cache_on_disk_if { true }
648 query is_object_safe(key: DefId) -> bool {
649 desc { |tcx| "determine object safety of trait `{}`", tcx.def_path_str(key) }
652 /// Gets the ParameterEnvironment for a given item; this environment
653 /// will be in "user-facing" mode, meaning that it is suitabe for
654 /// type-checking etc, and it does not normalize specializable
655 /// associated types. This is almost always what you want,
656 /// unless you are doing MIR optimizations, in which case you
657 /// might want to use `reveal_all()` method to change modes.
658 query param_env(_: DefId) -> ty::ParamEnv<'tcx> {}
660 /// Trait selection queries. These are best used by invoking `ty.is_copy_modulo_regions()`,
661 /// `ty.is_copy()`, etc, since that will prune the environment where possible.
662 query is_copy_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
664 desc { "computing whether `{}` is `Copy`", env.value }
666 query is_sized_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
668 desc { "computing whether `{}` is `Sized`", env.value }
670 query is_freeze_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> bool {
672 desc { "computing whether `{}` is freeze", env.value }
675 // The cycle error here should be reported as an error by `check_representable`.
676 // We consider the type as not needing drop in the meanwhile to avoid
677 // further errors (done in impl Value for NeedsDrop).
678 // Use `cycle_delay_bug` to delay the cycle error here to be emitted later
679 // in case we accidentally otherwise don't emit an error.
680 query needs_drop_raw(env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>) -> NeedsDrop {
683 desc { "computing whether `{}` needs drop", env.value }
687 env: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
688 ) -> Result<&'tcx ty::layout::LayoutDetails, ty::layout::LayoutError<'tcx>> {
690 desc { "computing layout of `{}`", env.value }
695 query dylib_dependency_formats(_: CrateNum)
696 -> &'tcx [(CrateNum, LinkagePreference)] {
697 desc { "dylib dependency formats of crate" }
700 query dependency_formats(_: CrateNum)
701 -> Lrc<crate::middle::dependency_format::Dependencies>
703 desc { "get the linkage format of all dependencies" }
708 query is_compiler_builtins(_: CrateNum) -> bool {
710 desc { "checking if the crate is_compiler_builtins" }
712 query has_global_allocator(_: CrateNum) -> bool {
714 desc { "checking if the crate has_global_allocator" }
716 query has_panic_handler(_: CrateNum) -> bool {
718 desc { "checking if the crate has_panic_handler" }
720 query is_profiler_runtime(_: CrateNum) -> bool {
722 desc { "query a crate is `#![profiler_runtime]`" }
724 query panic_strategy(_: CrateNum) -> PanicStrategy {
726 desc { "query a crate's configured panic strategy" }
728 query is_no_builtins(_: CrateNum) -> bool {
730 desc { "test whether a crate has `#![no_builtins]`" }
732 query symbol_mangling_version(_: CrateNum) -> SymbolManglingVersion {
734 desc { "query a crate's symbol mangling version" }
737 query extern_crate(_: DefId) -> Option<&'tcx ExternCrate> {
739 desc { "getting crate's ExternCrateData" }
744 query specializes(_: (DefId, DefId)) -> bool {
746 desc { "computing whether impls specialize one another" }
748 query in_scope_traits_map(_: DefIndex)
749 -> Option<&'tcx FxHashMap<ItemLocalId, StableVec<TraitCandidate>>> {
751 desc { "traits in scope at a block" }
756 query module_exports(_: DefId) -> Option<&'tcx [Export<hir::HirId>]> {
762 query impl_defaultness(_: DefId) -> hir::Defaultness {}
764 query check_item_well_formed(_: DefId) -> () {}
765 query check_trait_item_well_formed(_: DefId) -> () {}
766 query check_impl_item_well_formed(_: DefId) -> () {}
770 // The `DefId`s of all non-generic functions and statics in the given crate
771 // that can be reached from outside the crate.
773 // We expect this items to be available for being linked to.
775 // This query can also be called for `LOCAL_CRATE`. In this case it will
776 // compute which items will be reachable to other crates, taking into account
777 // the kind of crate that is currently compiled. Crates with only a
778 // C interface have fewer reachable things.
780 // Does not include external symbols that don't have a corresponding DefId,
781 // like the compiler-generated `main` function and so on.
782 query reachable_non_generics(_: CrateNum)
783 -> &'tcx DefIdMap<SymbolExportLevel> {
784 desc { "looking up the exported symbols of a crate" }
786 query is_reachable_non_generic(_: DefId) -> bool {}
787 query is_unreachable_local_definition(_: DefId) -> bool {}
791 /// The entire set of monomorphizations the local crate can safely link
792 /// to because they are exported from upstream crates. Do not depend on
793 /// this directly, as its value changes anytime a monomorphization gets
794 /// added or removed in any upstream crate. Instead use the narrower
795 /// `upstream_monomorphizations_for`, `upstream_drop_glue_for`, or, even
796 /// better, `Instance::upstream_monomorphization()`.
797 query upstream_monomorphizations(
799 ) -> &'tcx DefIdMap<FxHashMap<SubstsRef<'tcx>, CrateNum>> {
800 desc { "collecting available upstream monomorphizations `{:?}`", k }
803 /// Returns the set of upstream monomorphizations available for the
804 /// generic function identified by the given `def_id`. The query makes
805 /// sure to make a stable selection if the same monomorphization is
806 /// available in multiple upstream crates.
808 /// You likely want to call `Instance::upstream_monomorphization()`
809 /// instead of invoking this query directly.
810 query upstream_monomorphizations_for(_: DefId)
811 -> Option<&'tcx FxHashMap<SubstsRef<'tcx>, CrateNum>> {}
813 /// Returns the upstream crate that exports drop-glue for the given
814 /// type (`substs` is expected to be a single-item list containing the
815 /// type one wants drop-glue for).
817 /// This is a subset of `upstream_monomorphizations_for` in order to
818 /// increase dep-tracking granularity. Otherwise adding or removing any
819 /// type with drop-glue in any upstream crate would invalidate all
820 /// functions calling drop-glue of an upstream type.
822 /// You likely want to call `Instance::upstream_monomorphization()`
823 /// instead of invoking this query directly.
825 /// NOTE: This query could easily be extended to also support other
826 /// common functions that have are large set of monomorphizations
827 /// (like `Clone::clone` for example).
828 query upstream_drop_glue_for(substs: SubstsRef<'tcx>) -> Option<CrateNum> {
829 desc { "available upstream drop-glue for `{:?}`", substs }
835 query foreign_modules(_: CrateNum) -> &'tcx [ForeignModule] {
836 desc { "looking up the foreign modules of a linked crate" }
839 /// Identifies the entry-point (e.g., the `main` function) for a given
840 /// crate, returning `None` if there is no entry point (such as for library crates).
841 query entry_fn(_: CrateNum) -> Option<(DefId, EntryFnType)> {
842 desc { "looking up the entry function of a crate" }
844 query plugin_registrar_fn(_: CrateNum) -> Option<DefId> {
845 desc { "looking up the plugin registrar for a crate" }
847 query proc_macro_decls_static(_: CrateNum) -> Option<DefId> {
848 desc { "looking up the derive registrar for a crate" }
850 query crate_disambiguator(_: CrateNum) -> CrateDisambiguator {
852 desc { "looking up the disambiguator a crate" }
854 query crate_hash(_: CrateNum) -> Svh {
856 desc { "looking up the hash a crate" }
858 query crate_host_hash(_: CrateNum) -> Option<Svh> {
860 desc { "looking up the hash of a host version of a crate" }
862 query original_crate_name(_: CrateNum) -> Symbol {
864 desc { "looking up the original name a crate" }
866 query extra_filename(_: CrateNum) -> String {
868 desc { "looking up the extra filename for a crate" }
873 query implementations_of_trait(_: (CrateNum, DefId))
876 desc { "looking up implementations of a trait in a crate" }
878 query all_trait_implementations(_: CrateNum)
880 desc { "looking up all (?) trait implementations" }
885 query dllimport_foreign_items(_: CrateNum)
886 -> &'tcx FxHashSet<DefId> {
887 desc { "dllimport_foreign_items" }
889 query is_dllimport_foreign_item(_: DefId) -> bool {}
890 query is_statically_included_foreign_item(_: DefId) -> bool {}
891 query native_library_kind(_: DefId)
892 -> Option<NativeLibraryKind> {}
896 query link_args(_: CrateNum) -> Lrc<Vec<String>> {
898 desc { "looking up link arguments for a crate" }
903 /// Lifetime resolution. See `middle::resolve_lifetimes`.
904 query resolve_lifetimes(_: CrateNum) -> &'tcx ResolveLifetimes {
905 desc { "resolving lifetimes" }
907 query named_region_map(_: DefIndex) ->
908 Option<&'tcx FxHashMap<ItemLocalId, Region>> {
909 desc { "looking up a named region" }
911 query is_late_bound_map(_: DefIndex) ->
912 Option<&'tcx FxHashSet<ItemLocalId>> {
913 desc { "testing if a region is late bound" }
915 query object_lifetime_defaults_map(_: DefIndex)
916 -> Option<&'tcx FxHashMap<ItemLocalId, Vec<ObjectLifetimeDefault>>> {
917 desc { "looking up lifetime defaults for a region" }
922 query visibility(_: DefId) -> ty::Visibility {}
926 query dep_kind(_: CrateNum) -> DepKind {
928 desc { "fetching what a dependency looks like" }
930 query crate_name(_: CrateNum) -> Symbol {
932 desc { "fetching what a crate is named" }
934 query item_children(_: DefId) -> &'tcx [Export<hir::HirId>] {}
935 query extern_mod_stmt_cnum(_: DefId) -> Option<CrateNum> {}
937 query get_lib_features(_: CrateNum) -> &'tcx LibFeatures {
939 desc { "calculating the lib features map" }
941 query defined_lib_features(_: CrateNum)
942 -> &'tcx [(Symbol, Option<Symbol>)] {
943 desc { "calculating the lib features defined in a crate" }
945 /// Returns the lang items defined in another crate by loading it from metadata.
946 // FIXME: It is illegal to pass a `CrateNum` other than `LOCAL_CRATE` here, just get rid
948 query get_lang_items(_: CrateNum) -> &'tcx LanguageItems {
950 desc { "calculating the lang items map" }
953 /// Returns all diagnostic items defined in all crates.
954 query all_diagnostic_items(_: CrateNum) -> &'tcx FxHashMap<Symbol, DefId> {
956 desc { "calculating the diagnostic items map" }
959 /// Returns the lang items defined in another crate by loading it from metadata.
960 query defined_lang_items(_: CrateNum) -> &'tcx [(DefId, usize)] {
961 desc { "calculating the lang items defined in a crate" }
964 /// Returns the diagnostic items defined in a crate.
965 query diagnostic_items(_: CrateNum) -> &'tcx FxHashMap<Symbol, DefId> {
966 desc { "calculating the diagnostic items map in a crate" }
969 query missing_lang_items(_: CrateNum) -> &'tcx [LangItem] {
970 desc { "calculating the missing lang items in a crate" }
972 query visible_parent_map(_: CrateNum)
973 -> &'tcx DefIdMap<DefId> {
974 desc { "calculating the visible parent map" }
976 query missing_extern_crate_item(_: CrateNum) -> bool {
978 desc { "seeing if we're missing an `extern crate` item for this crate" }
980 query used_crate_source(_: CrateNum) -> Lrc<CrateSource> {
982 desc { "looking at the source for a crate" }
984 query postorder_cnums(_: CrateNum) -> &'tcx [CrateNum] {
986 desc { "generating a postorder list of CrateNums" }
989 query upvars(_: DefId) -> Option<&'tcx FxIndexMap<hir::HirId, hir::Upvar>> {
992 query maybe_unused_trait_import(_: DefId) -> bool {
995 query maybe_unused_extern_crates(_: CrateNum)
996 -> &'tcx [(DefId, Span)] {
998 desc { "looking up all possibly unused extern crates" }
1000 query names_imported_by_glob_use(_: DefId)
1001 -> Lrc<FxHashSet<ast::Name>> {
1005 query stability_index(_: CrateNum) -> &'tcx stability::Index<'tcx> {
1007 desc { "calculating the stability index for the local crate" }
1009 query all_crate_nums(_: CrateNum) -> &'tcx [CrateNum] {
1011 desc { "fetching all foreign CrateNum instances" }
1014 /// A vector of every trait accessible in the whole crate
1015 /// (i.e., including those from subcrates). This is used only for
1016 /// error reporting.
1017 query all_traits(_: CrateNum) -> &'tcx [DefId] {
1018 desc { "fetching all foreign and local traits" }
1023 /// The list of symbols exported from the given crate.
1025 /// - All names contained in `exported_symbols(cnum)` are guaranteed to
1026 /// correspond to a publicly visible symbol in `cnum` machine code.
1027 /// - The `exported_symbols` sets of different crates do not intersect.
1028 query exported_symbols(_: CrateNum)
1029 -> Arc<Vec<(ExportedSymbol<'tcx>, SymbolExportLevel)>> {
1030 desc { "exported_symbols" }
1035 query collect_and_partition_mono_items(_: CrateNum)
1036 -> (Arc<DefIdSet>, Arc<Vec<Arc<CodegenUnit<'tcx>>>>) {
1038 desc { "collect_and_partition_mono_items" }
1040 query is_codegened_item(_: DefId) -> bool {}
1041 query codegen_unit(_: Symbol) -> Arc<CodegenUnit<'tcx>> {
1043 desc { "codegen_unit" }
1045 query backend_optimization_level(_: CrateNum) -> OptLevel {
1046 desc { "optimization level used by backend" }
1051 query output_filenames(_: CrateNum) -> Arc<OutputFilenames> {
1053 desc { "output_filenames" }
1058 /// Do not call this query directly: invoke `normalize` instead.
1059 query normalize_projection_ty(
1060 goal: CanonicalProjectionGoal<'tcx>
1062 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, NormalizationResult<'tcx>>>,
1066 desc { "normalizing `{:?}`", goal }
1069 /// Do not call this query directly: invoke `normalize_erasing_regions` instead.
1070 query normalize_ty_after_erasing_regions(
1071 goal: ParamEnvAnd<'tcx, Ty<'tcx>>
1074 desc { "normalizing `{:?}`", goal }
1077 query implied_outlives_bounds(
1078 goal: CanonicalTyGoal<'tcx>
1080 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Vec<OutlivesBound<'tcx>>>>,
1084 desc { "computing implied outlives bounds for `{:?}`", goal }
1087 /// Do not call this query directly: invoke `infcx.at().dropck_outlives()` instead.
1088 query dropck_outlives(
1089 goal: CanonicalTyGoal<'tcx>
1091 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, DropckOutlivesResult<'tcx>>>,
1095 desc { "computing dropck types for `{:?}`", goal }
1098 /// Do not call this query directly: invoke `infcx.predicate_may_hold()` or
1099 /// `infcx.predicate_must_hold()` instead.
1100 query evaluate_obligation(
1101 goal: CanonicalPredicateGoal<'tcx>
1102 ) -> Result<traits::EvaluationResult, traits::OverflowError> {
1104 desc { "evaluating trait selection obligation `{}`", goal.value.value }
1107 query evaluate_goal(
1108 goal: traits::ChalkCanonicalGoal<'tcx>
1110 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1114 desc { "evaluating trait selection obligation `{}`", goal.value.goal }
1117 /// Do not call this query directly: part of the `Eq` type-op
1118 query type_op_ascribe_user_type(
1119 goal: CanonicalTypeOpAscribeUserTypeGoal<'tcx>
1121 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1125 desc { "evaluating `type_op_ascribe_user_type` `{:?}`", goal }
1128 /// Do not call this query directly: part of the `Eq` type-op
1130 goal: CanonicalTypeOpEqGoal<'tcx>
1132 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1136 desc { "evaluating `type_op_eq` `{:?}`", goal }
1139 /// Do not call this query directly: part of the `Subtype` type-op
1140 query type_op_subtype(
1141 goal: CanonicalTypeOpSubtypeGoal<'tcx>
1143 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1147 desc { "evaluating `type_op_subtype` `{:?}`", goal }
1150 /// Do not call this query directly: part of the `ProvePredicate` type-op
1151 query type_op_prove_predicate(
1152 goal: CanonicalTypeOpProvePredicateGoal<'tcx>
1154 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ()>>,
1158 desc { "evaluating `type_op_prove_predicate` `{:?}`", goal }
1161 /// Do not call this query directly: part of the `Normalize` type-op
1162 query type_op_normalize_ty(
1163 goal: CanonicalTypeOpNormalizeGoal<'tcx, Ty<'tcx>>
1165 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, Ty<'tcx>>>,
1169 desc { "normalizing `{:?}`", goal }
1172 /// Do not call this query directly: part of the `Normalize` type-op
1173 query type_op_normalize_predicate(
1174 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::Predicate<'tcx>>
1176 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::Predicate<'tcx>>>,
1180 desc { "normalizing `{:?}`", goal }
1183 /// Do not call this query directly: part of the `Normalize` type-op
1184 query type_op_normalize_poly_fn_sig(
1185 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::PolyFnSig<'tcx>>
1187 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::PolyFnSig<'tcx>>>,
1191 desc { "normalizing `{:?}`", goal }
1194 /// Do not call this query directly: part of the `Normalize` type-op
1195 query type_op_normalize_fn_sig(
1196 goal: CanonicalTypeOpNormalizeGoal<'tcx, ty::FnSig<'tcx>>
1198 &'tcx Canonical<'tcx, canonical::QueryResponse<'tcx, ty::FnSig<'tcx>>>,
1202 desc { "normalizing `{:?}`", goal }
1205 query substitute_normalize_and_test_predicates(key: (DefId, SubstsRef<'tcx>)) -> bool {
1208 "testing substituted normalized predicates:`{}`",
1209 tcx.def_path_str(key.0)
1213 query method_autoderef_steps(
1214 goal: CanonicalTyGoal<'tcx>
1215 ) -> MethodAutoderefStepsResult<'tcx> {
1217 desc { "computing autoderef types for `{:?}`", goal }
1222 query target_features_whitelist(_: CrateNum) -> &'tcx FxHashMap<String, Option<Symbol>> {
1224 desc { "looking up the whitelist of target features" }
1227 // Get an estimate of the size of an InstanceDef based on its MIR for CGU partitioning.
1228 query instance_def_size_estimate(def: ty::InstanceDef<'tcx>)
1231 desc { |tcx| "estimating size for `{}`", tcx.def_path_str(def.def_id()) }
1234 query features_query(_: CrateNum) -> &'tcx rustc_feature::Features {
1236 desc { "looking up enabled feature gates" }