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Rollup merge of #102280 - notriddle:notriddle/band, r=GuillaumeGomez
[rust.git] / compiler / rustc_query_impl / src / plumbing.rs
1 //! The implementation of the query system itself. This defines the macros that
2 //! generate the actual methods on tcx which find and execute the provider,
3 //! manage the caches, and so forth.
4
5 use crate::keys::Key;
6 use crate::on_disk_cache::CacheDecoder;
7 use crate::{on_disk_cache, Queries};
8 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
9 use rustc_data_structures::sync::{AtomicU64, Lock};
10 use rustc_errors::{Diagnostic, Handler};
11 use rustc_middle::dep_graph::{
12     self, DepKind, DepKindStruct, DepNode, DepNodeIndex, SerializedDepNodeIndex,
13 };
14 use rustc_middle::ty::tls::{self, ImplicitCtxt};
15 use rustc_middle::ty::{self, TyCtxt};
16 use rustc_query_system::dep_graph::{DepNodeParams, HasDepContext};
17 use rustc_query_system::ich::StableHashingContext;
18 use rustc_query_system::query::{
19     force_query, QueryConfig, QueryContext, QueryDescription, QueryJobId, QueryMap,
20     QuerySideEffects, QueryStackFrame,
21 };
22 use rustc_query_system::{LayoutOfDepth, QueryOverflow, Value};
23 use rustc_serialize::Decodable;
24 use rustc_session::Limit;
25 use rustc_span::def_id::LOCAL_CRATE;
26 use std::any::Any;
27 use std::num::NonZeroU64;
28 use thin_vec::ThinVec;
29
30 #[derive(Copy, Clone)]
31 pub struct QueryCtxt<'tcx> {
32     pub tcx: TyCtxt<'tcx>,
33     pub queries: &'tcx Queries<'tcx>,
34 }
35
36 impl<'tcx> std::ops::Deref for QueryCtxt<'tcx> {
37     type Target = TyCtxt<'tcx>;
38
39     #[inline]
40     fn deref(&self) -> &Self::Target {
41         &self.tcx
42     }
43 }
44
45 impl<'tcx> HasDepContext for QueryCtxt<'tcx> {
46     type DepKind = rustc_middle::dep_graph::DepKind;
47     type DepContext = TyCtxt<'tcx>;
48
49     #[inline]
50     fn dep_context(&self) -> &Self::DepContext {
51         &self.tcx
52     }
53 }
54
55 impl QueryContext for QueryCtxt<'_> {
56     fn next_job_id(&self) -> QueryJobId {
57         QueryJobId(
58             NonZeroU64::new(
59                 self.queries.jobs.fetch_add(1, rustc_data_structures::sync::Ordering::Relaxed),
60             )
61             .unwrap(),
62         )
63     }
64
65     fn current_query_job(&self) -> Option<QueryJobId> {
66         tls::with_related_context(**self, |icx| icx.query)
67     }
68
69     fn try_collect_active_jobs(&self) -> Option<QueryMap> {
70         self.queries.try_collect_active_jobs(**self)
71     }
72
73     // Interactions with on_disk_cache
74     fn load_side_effects(&self, prev_dep_node_index: SerializedDepNodeIndex) -> QuerySideEffects {
75         self.queries
76             .on_disk_cache
77             .as_ref()
78             .map(|c| c.load_side_effects(**self, prev_dep_node_index))
79             .unwrap_or_default()
80     }
81
82     fn store_side_effects(&self, dep_node_index: DepNodeIndex, side_effects: QuerySideEffects) {
83         if let Some(c) = self.queries.on_disk_cache.as_ref() {
84             c.store_side_effects(dep_node_index, side_effects)
85         }
86     }
87
88     fn store_side_effects_for_anon_node(
89         &self,
90         dep_node_index: DepNodeIndex,
91         side_effects: QuerySideEffects,
92     ) {
93         if let Some(c) = self.queries.on_disk_cache.as_ref() {
94             c.store_side_effects_for_anon_node(dep_node_index, side_effects)
95         }
96     }
97
98     /// Executes a job by changing the `ImplicitCtxt` to point to the
99     /// new query job while it executes. It returns the diagnostics
100     /// captured during execution and the actual result.
101     #[inline(always)]
102     fn start_query<R>(
103         &self,
104         token: QueryJobId,
105         depth_limit: bool,
106         diagnostics: Option<&Lock<ThinVec<Diagnostic>>>,
107         compute: impl FnOnce() -> R,
108     ) -> R {
109         // The `TyCtxt` stored in TLS has the same global interner lifetime
110         // as `self`, so we use `with_related_context` to relate the 'tcx lifetimes
111         // when accessing the `ImplicitCtxt`.
112         tls::with_related_context(**self, move |current_icx| {
113             if depth_limit && !self.recursion_limit().value_within_limit(current_icx.query_depth) {
114                 self.depth_limit_error(token);
115             }
116
117             // Update the `ImplicitCtxt` to point to our new query job.
118             let new_icx = ImplicitCtxt {
119                 tcx: **self,
120                 query: Some(token),
121                 diagnostics,
122                 query_depth: current_icx.query_depth + depth_limit as usize,
123                 task_deps: current_icx.task_deps,
124             };
125
126             // Use the `ImplicitCtxt` while we execute the query.
127             tls::enter_context(&new_icx, |_| {
128                 rustc_data_structures::stack::ensure_sufficient_stack(compute)
129             })
130         })
131     }
132
133     fn depth_limit_error(&self, job: QueryJobId) {
134         let mut span = None;
135         let mut layout_of_depth = None;
136         if let Some(map) = self.try_collect_active_jobs() {
137             if let Some((info, depth)) = job.try_find_layout_root(map) {
138                 span = Some(info.job.span);
139                 layout_of_depth = Some(LayoutOfDepth { desc: info.query.description, depth });
140             }
141         }
142
143         let suggested_limit = match self.recursion_limit() {
144             Limit(0) => Limit(2),
145             limit => limit * 2,
146         };
147
148         self.sess.emit_fatal(QueryOverflow {
149             span,
150             layout_of_depth,
151             suggested_limit,
152             crate_name: self.crate_name(LOCAL_CRATE),
153         });
154     }
155 }
156
157 impl<'tcx> QueryCtxt<'tcx> {
158     #[inline]
159     pub fn from_tcx(tcx: TyCtxt<'tcx>) -> Self {
160         let queries = tcx.queries.as_any();
161         let queries = unsafe {
162             let queries = std::mem::transmute::<&dyn Any, &dyn Any>(queries);
163             let queries = queries.downcast_ref().unwrap();
164             let queries = std::mem::transmute::<&Queries<'_>, &Queries<'_>>(queries);
165             queries
166         };
167         QueryCtxt { tcx, queries }
168     }
169
170     pub(crate) fn on_disk_cache(self) -> Option<&'tcx on_disk_cache::OnDiskCache<'tcx>> {
171         self.queries.on_disk_cache.as_ref()
172     }
173
174     pub(super) fn encode_query_results(
175         self,
176         encoder: &mut on_disk_cache::CacheEncoder<'_, 'tcx>,
177         query_result_index: &mut on_disk_cache::EncodedDepNodeIndex,
178     ) {
179         macro_rules! expand_if_cached {
180             ([] $encode:expr) => {};
181             ([(cache) $($rest:tt)*] $encode:expr) => {
182                 $encode
183             };
184             ([$other:tt $($modifiers:tt)*] $encode:expr) => {
185                 expand_if_cached!([$($modifiers)*] $encode)
186             };
187         }
188
189         macro_rules! encode_queries {
190             (
191             $($(#[$attr:meta])*
192                 [$($modifiers:tt)*] fn $query:ident($($K:tt)*) -> $V:ty,)*) => {
193                 $(
194                     expand_if_cached!([$($modifiers)*] on_disk_cache::encode_query_results::<_, super::queries::$query<'_>>(
195                         self,
196                         encoder,
197                         query_result_index
198                     ));
199                 )*
200             }
201         }
202
203         rustc_query_append!(encode_queries!);
204     }
205
206     pub fn try_print_query_stack(
207         self,
208         query: Option<QueryJobId>,
209         handler: &Handler,
210         num_frames: Option<usize>,
211     ) -> usize {
212         rustc_query_system::query::print_query_stack(self, query, handler, num_frames)
213     }
214 }
215
216 macro_rules! handle_cycle_error {
217     ([]) => {{
218         rustc_query_system::HandleCycleError::Error
219     }};
220     ([(fatal_cycle) $($rest:tt)*]) => {{
221         rustc_query_system::HandleCycleError::Fatal
222     }};
223     ([(cycle_delay_bug) $($rest:tt)*]) => {{
224         rustc_query_system::HandleCycleError::DelayBug
225     }};
226     ([$other:tt $($modifiers:tt)*]) => {
227         handle_cycle_error!([$($modifiers)*])
228     };
229 }
230
231 macro_rules! is_anon {
232     ([]) => {{
233         false
234     }};
235     ([(anon) $($rest:tt)*]) => {{
236         true
237     }};
238     ([$other:tt $($modifiers:tt)*]) => {
239         is_anon!([$($modifiers)*])
240     };
241 }
242
243 macro_rules! is_eval_always {
244     ([]) => {{
245         false
246     }};
247     ([(eval_always) $($rest:tt)*]) => {{
248         true
249     }};
250     ([$other:tt $($modifiers:tt)*]) => {
251         is_eval_always!([$($modifiers)*])
252     };
253 }
254
255 macro_rules! depth_limit {
256     ([]) => {{
257         false
258     }};
259     ([(depth_limit) $($rest:tt)*]) => {{
260         true
261     }};
262     ([$other:tt $($modifiers:tt)*]) => {
263         depth_limit!([$($modifiers)*])
264     };
265 }
266
267 macro_rules! hash_result {
268     ([]) => {{
269         Some(dep_graph::hash_result)
270     }};
271     ([(no_hash) $($rest:tt)*]) => {{
272         None
273     }};
274     ([$other:tt $($modifiers:tt)*]) => {
275         hash_result!([$($modifiers)*])
276     };
277 }
278
279 macro_rules! get_provider {
280     ([][$tcx:expr, $name:ident, $key:expr]) => {{
281         $tcx.queries.local_providers.$name
282     }};
283     ([(separate_provide_extern) $($rest:tt)*][$tcx:expr, $name:ident, $key:expr]) => {{
284         if $key.query_crate_is_local() {
285             $tcx.queries.local_providers.$name
286         } else {
287             $tcx.queries.extern_providers.$name
288         }
289     }};
290     ([$other:tt $($modifiers:tt)*][$($args:tt)*]) => {
291         get_provider!([$($modifiers)*][$($args)*])
292     };
293 }
294
295 macro_rules! should_ever_cache_on_disk {
296     ([]) => {{
297         None
298     }};
299     ([(cache) $($rest:tt)*]) => {{
300         Some($crate::plumbing::try_load_from_disk::<Self::Value>)
301     }};
302     ([$other:tt $($modifiers:tt)*]) => {
303         should_ever_cache_on_disk!([$($modifiers)*])
304     };
305 }
306
307 pub(crate) fn create_query_frame<
308     'tcx,
309     K: Copy + Key + for<'a> HashStable<StableHashingContext<'a>>,
310 >(
311     tcx: QueryCtxt<'tcx>,
312     do_describe: fn(QueryCtxt<'tcx>, K) -> String,
313     key: K,
314     kind: DepKind,
315     name: &'static str,
316 ) -> QueryStackFrame {
317     // Disable visible paths printing for performance reasons.
318     // Showing visible path instead of any path is not that important in production.
319     let description = ty::print::with_no_visible_paths!(
320         // Force filename-line mode to avoid invoking `type_of` query.
321         ty::print::with_forced_impl_filename_line!(do_describe(tcx, key))
322     );
323     let description =
324         if tcx.sess.verbose() { format!("{} [{}]", description, name) } else { description };
325     let span = if kind == dep_graph::DepKind::def_span {
326         // The `def_span` query is used to calculate `default_span`,
327         // so exit to avoid infinite recursion.
328         None
329     } else {
330         Some(key.default_span(*tcx))
331     };
332     let def_kind = if kind == dep_graph::DepKind::opt_def_kind {
333         // Try to avoid infinite recursion.
334         None
335     } else {
336         key.key_as_def_id()
337             .and_then(|def_id| def_id.as_local())
338             .and_then(|def_id| tcx.opt_def_kind(def_id))
339     };
340     let hash = || {
341         tcx.with_stable_hashing_context(|mut hcx| {
342             let mut hasher = StableHasher::new();
343             std::mem::discriminant(&kind).hash_stable(&mut hcx, &mut hasher);
344             key.hash_stable(&mut hcx, &mut hasher);
345             hasher.finish::<u64>()
346         })
347     };
348
349     QueryStackFrame::new(name, description, span, def_kind, hash)
350 }
351
352 fn try_load_from_on_disk_cache<'tcx, Q>(tcx: TyCtxt<'tcx>, dep_node: DepNode)
353 where
354     Q: QueryDescription<QueryCtxt<'tcx>>,
355     Q::Key: DepNodeParams<TyCtxt<'tcx>>,
356 {
357     debug_assert!(tcx.dep_graph.is_green(&dep_node));
358
359     let key = Q::Key::recover(tcx, &dep_node).unwrap_or_else(|| {
360         panic!("Failed to recover key for {:?} with hash {}", dep_node, dep_node.hash)
361     });
362     if Q::cache_on_disk(tcx, &key) {
363         let _ = Q::execute_query(tcx, key);
364     }
365 }
366
367 pub(crate) fn try_load_from_disk<'tcx, V>(
368     tcx: QueryCtxt<'tcx>,
369     id: SerializedDepNodeIndex,
370 ) -> Option<V>
371 where
372     V: for<'a> Decodable<CacheDecoder<'a, 'tcx>>,
373 {
374     tcx.on_disk_cache().as_ref()?.try_load_query_result(*tcx, id)
375 }
376
377 fn force_from_dep_node<'tcx, Q>(tcx: TyCtxt<'tcx>, dep_node: DepNode) -> bool
378 where
379     Q: QueryDescription<QueryCtxt<'tcx>>,
380     Q::Key: DepNodeParams<TyCtxt<'tcx>>,
381     Q::Value: Value<TyCtxt<'tcx>>,
382 {
383     // We must avoid ever having to call `force_from_dep_node()` for a
384     // `DepNode::codegen_unit`:
385     // Since we cannot reconstruct the query key of a `DepNode::codegen_unit`, we
386     // would always end up having to evaluate the first caller of the
387     // `codegen_unit` query that *is* reconstructible. This might very well be
388     // the `compile_codegen_unit` query, thus re-codegenning the whole CGU just
389     // to re-trigger calling the `codegen_unit` query with the right key. At
390     // that point we would already have re-done all the work we are trying to
391     // avoid doing in the first place.
392     // The solution is simple: Just explicitly call the `codegen_unit` query for
393     // each CGU, right after partitioning. This way `try_mark_green` will always
394     // hit the cache instead of having to go through `force_from_dep_node`.
395     // This assertion makes sure, we actually keep applying the solution above.
396     debug_assert!(
397         dep_node.kind != DepKind::codegen_unit,
398         "calling force_from_dep_node() on DepKind::codegen_unit"
399     );
400
401     if let Some(key) = Q::Key::recover(tcx, &dep_node) {
402         #[cfg(debug_assertions)]
403         let _guard = tracing::span!(tracing::Level::TRACE, stringify!($name), ?key).entered();
404         let tcx = QueryCtxt::from_tcx(tcx);
405         force_query::<Q, _>(tcx, key, dep_node);
406         true
407     } else {
408         false
409     }
410 }
411
412 pub(crate) fn query_callback<'tcx, Q: QueryConfig>(
413     is_anon: bool,
414     is_eval_always: bool,
415 ) -> DepKindStruct<'tcx>
416 where
417     Q: QueryDescription<QueryCtxt<'tcx>>,
418     Q::Key: DepNodeParams<TyCtxt<'tcx>>,
419 {
420     let fingerprint_style = Q::Key::fingerprint_style();
421
422     if is_anon || !fingerprint_style.reconstructible() {
423         return DepKindStruct {
424             is_anon,
425             is_eval_always,
426             fingerprint_style,
427             force_from_dep_node: None,
428             try_load_from_on_disk_cache: None,
429         };
430     }
431
432     DepKindStruct {
433         is_anon,
434         is_eval_always,
435         fingerprint_style,
436         force_from_dep_node: Some(force_from_dep_node::<Q>),
437         try_load_from_on_disk_cache: Some(try_load_from_on_disk_cache::<Q>),
438     }
439 }
440
441 // NOTE: `$V` isn't used here, but we still need to match on it so it can be passed to other macros
442 // invoked by `rustc_query_append`.
443 macro_rules! define_queries {
444     (
445      $($(#[$attr:meta])*
446         [$($modifiers:tt)*] fn $name:ident($($K:tt)*) -> $V:ty,)*) => {
447         define_queries_struct! {
448             input: ($(([$($modifiers)*] [$($attr)*] [$name]))*)
449         }
450
451         #[allow(nonstandard_style)]
452         mod queries {
453             use std::marker::PhantomData;
454
455             $(pub struct $name<'tcx> {
456                 data: PhantomData<&'tcx ()>
457             })*
458         }
459
460         $(impl<'tcx> QueryConfig for queries::$name<'tcx> {
461             type Key = query_keys::$name<'tcx>;
462             type Value = query_values::$name<'tcx>;
463             type Stored = query_stored::$name<'tcx>;
464             const NAME: &'static str = stringify!($name);
465         }
466
467         impl<'tcx> QueryDescription<QueryCtxt<'tcx>> for queries::$name<'tcx> {
468             rustc_query_description! { $name }
469
470             type Cache = query_storage::$name<'tcx>;
471
472             #[inline(always)]
473             fn query_state<'a>(tcx: QueryCtxt<'tcx>) -> &'a QueryState<Self::Key>
474                 where QueryCtxt<'tcx>: 'a
475             {
476                 &tcx.queries.$name
477             }
478
479             #[inline(always)]
480             fn query_cache<'a>(tcx: QueryCtxt<'tcx>) -> &'a Self::Cache
481                 where 'tcx:'a
482             {
483                 &tcx.query_caches.$name
484             }
485
486             #[inline]
487             fn make_vtable(tcx: QueryCtxt<'tcx>, key: &Self::Key) ->
488                 QueryVTable<QueryCtxt<'tcx>, Self::Key, Self::Value>
489             {
490                 let compute = get_provider!([$($modifiers)*][tcx, $name, key]);
491                 let cache_on_disk = Self::cache_on_disk(tcx.tcx, key);
492                 QueryVTable {
493                     anon: is_anon!([$($modifiers)*]),
494                     eval_always: is_eval_always!([$($modifiers)*]),
495                     depth_limit: depth_limit!([$($modifiers)*]),
496                     dep_kind: dep_graph::DepKind::$name,
497                     hash_result: hash_result!([$($modifiers)*]),
498                     handle_cycle_error: handle_cycle_error!([$($modifiers)*]),
499                     compute,
500                     try_load_from_disk: if cache_on_disk { should_ever_cache_on_disk!([$($modifiers)*]) } else { None },
501                 }
502             }
503
504             fn execute_query(tcx: TyCtxt<'tcx>, k: Self::Key) -> Self::Stored {
505                 tcx.$name(k)
506             }
507         })*
508
509         #[allow(nonstandard_style)]
510         mod query_callbacks {
511             use super::*;
512             use rustc_query_system::dep_graph::FingerprintStyle;
513
514             // We use this for most things when incr. comp. is turned off.
515             pub fn Null<'tcx>() -> DepKindStruct<'tcx> {
516                 DepKindStruct {
517                     is_anon: false,
518                     is_eval_always: false,
519                     fingerprint_style: FingerprintStyle::Unit,
520                     force_from_dep_node: Some(|_, dep_node| bug!("force_from_dep_node: encountered {:?}", dep_node)),
521                     try_load_from_on_disk_cache: None,
522                 }
523             }
524
525             // We use this for the forever-red node.
526             pub fn Red<'tcx>() -> DepKindStruct<'tcx> {
527                 DepKindStruct {
528                     is_anon: false,
529                     is_eval_always: false,
530                     fingerprint_style: FingerprintStyle::Unit,
531                     force_from_dep_node: Some(|_, dep_node| bug!("force_from_dep_node: encountered {:?}", dep_node)),
532                     try_load_from_on_disk_cache: None,
533                 }
534             }
535
536             pub fn TraitSelect<'tcx>() -> DepKindStruct<'tcx> {
537                 DepKindStruct {
538                     is_anon: true,
539                     is_eval_always: false,
540                     fingerprint_style: FingerprintStyle::Unit,
541                     force_from_dep_node: None,
542                     try_load_from_on_disk_cache: None,
543                 }
544             }
545
546             pub fn CompileCodegenUnit<'tcx>() -> DepKindStruct<'tcx> {
547                 DepKindStruct {
548                     is_anon: false,
549                     is_eval_always: false,
550                     fingerprint_style: FingerprintStyle::Opaque,
551                     force_from_dep_node: None,
552                     try_load_from_on_disk_cache: None,
553                 }
554             }
555
556             pub fn CompileMonoItem<'tcx>() -> DepKindStruct<'tcx> {
557                 DepKindStruct {
558                     is_anon: false,
559                     is_eval_always: false,
560                     fingerprint_style: FingerprintStyle::Opaque,
561                     force_from_dep_node: None,
562                     try_load_from_on_disk_cache: None,
563                 }
564             }
565
566             $(pub(crate) fn $name<'tcx>()-> DepKindStruct<'tcx> {
567                 $crate::plumbing::query_callback::<queries::$name<'tcx>>(
568                     is_anon!([$($modifiers)*]),
569                     is_eval_always!([$($modifiers)*]),
570                 )
571             })*
572         }
573
574         pub fn query_callbacks<'tcx>(arena: &'tcx Arena<'tcx>) -> &'tcx [DepKindStruct<'tcx>] {
575             arena.alloc_from_iter(make_dep_kind_array!(query_callbacks))
576         }
577     }
578 }
579
580 use crate::{ExternProviders, OnDiskCache, Providers};
581
582 impl<'tcx> Queries<'tcx> {
583     pub fn new(
584         local_providers: Providers,
585         extern_providers: ExternProviders,
586         on_disk_cache: Option<OnDiskCache<'tcx>>,
587     ) -> Self {
588         Queries {
589             local_providers: Box::new(local_providers),
590             extern_providers: Box::new(extern_providers),
591             on_disk_cache,
592             jobs: AtomicU64::new(1),
593             ..Queries::default()
594         }
595     }
596 }
597
598 macro_rules! define_queries_struct {
599     (
600      input: ($(([$($modifiers:tt)*] [$($attr:tt)*] [$name:ident]))*)) => {
601         #[derive(Default)]
602         pub struct Queries<'tcx> {
603             local_providers: Box<Providers>,
604             extern_providers: Box<ExternProviders>,
605
606             pub on_disk_cache: Option<OnDiskCache<'tcx>>,
607
608             jobs: AtomicU64,
609
610             $($(#[$attr])*  $name: QueryState<<queries::$name<'tcx> as QueryConfig>::Key>,)*
611         }
612
613         impl<'tcx> Queries<'tcx> {
614             pub(crate) fn try_collect_active_jobs(
615                 &'tcx self,
616                 tcx: TyCtxt<'tcx>,
617             ) -> Option<QueryMap> {
618                 let tcx = QueryCtxt { tcx, queries: self };
619                 let mut jobs = QueryMap::default();
620
621                 $(
622                     let make_query = |tcx, key| {
623                         let kind = dep_graph::DepKind::$name;
624                         let name = stringify!($name);
625                         $crate::plumbing::create_query_frame(tcx, queries::$name::describe, key, kind, name)
626                     };
627                     self.$name.try_collect_active_jobs(
628                         tcx,
629                         make_query,
630                         &mut jobs,
631                     )?;
632                 )*
633
634                 Some(jobs)
635             }
636         }
637
638         impl<'tcx> QueryEngine<'tcx> for Queries<'tcx> {
639             fn as_any(&'tcx self) -> &'tcx dyn std::any::Any {
640                 let this = unsafe { std::mem::transmute::<&Queries<'_>, &Queries<'_>>(self) };
641                 this as _
642             }
643
644             fn try_mark_green(&'tcx self, tcx: TyCtxt<'tcx>, dep_node: &dep_graph::DepNode) -> bool {
645                 let qcx = QueryCtxt { tcx, queries: self };
646                 tcx.dep_graph.try_mark_green(qcx, dep_node).is_some()
647             }
648
649             $($(#[$attr])*
650             #[inline(always)]
651             #[tracing::instrument(level = "trace", skip(self, tcx), ret)]
652             fn $name(
653                 &'tcx self,
654                 tcx: TyCtxt<'tcx>,
655                 span: Span,
656                 key: <queries::$name<'tcx> as QueryConfig>::Key,
657                 mode: QueryMode,
658             ) -> Option<query_stored::$name<'tcx>> {
659                 let qcx = QueryCtxt { tcx, queries: self };
660                 get_query::<queries::$name<'tcx>, _>(qcx, span, key, mode)
661             })*
662         }
663     };
664 }