1use std::borrow::Borrow;
2use std::collections::hash_map::Entry;
3use std::fs::File;
4use std::io::{Read, Seek, Write};
5use std::path::{Path, PathBuf};
6use std::sync::Arc;
7
8use rustc_ast::attr::AttributeExt;
9use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
10use rustc_data_structures::memmap::{Mmap, MmapMut};
11use rustc_data_structures::sync::{join, par_for_each_in};
12use rustc_data_structures::temp_dir::MaybeTempDir;
13use rustc_data_structures::thousands::format_with_underscores;
14use rustc_feature::Features;
15use rustc_hir as hir;
16use rustc_hir::def_id::{CRATE_DEF_ID, CRATE_DEF_INDEX, LOCAL_CRATE, LocalDefId, LocalDefIdSet};
17use rustc_hir::definitions::DefPathData;
18use rustc_hir_pretty::id_to_string;
19use rustc_middle::middle::dependency_format::Linkage;
20use rustc_middle::middle::exported_symbols::metadata_symbol_name;
21use rustc_middle::mir::interpret;
22use rustc_middle::query::Providers;
23use rustc_middle::traits::specialization_graph;
24use rustc_middle::ty::codec::TyEncoder;
25use rustc_middle::ty::fast_reject::{self, TreatParams};
26use rustc_middle::ty::{AssocItemContainer, SymbolName};
27use rustc_middle::{bug, span_bug};
28use rustc_serialize::{Decodable, Decoder, Encodable, Encoder, opaque};
29use rustc_session::config::{CrateType, OptLevel, TargetModifier};
30use rustc_span::hygiene::HygieneEncodeContext;
31use rustc_span::{
32 ExternalSource, FileName, SourceFile, SpanData, SpanEncoder, StableSourceFileId, SyntaxContext,
33 sym,
34};
35use tracing::{debug, instrument, trace};
36
37use crate::errors::{FailCreateFileEncoder, FailWriteFile};
38use crate::rmeta::*;
39
40pub(super) struct EncodeContext<'a, 'tcx> {
41 opaque: opaque::FileEncoder,
42 tcx: TyCtxt<'tcx>,
43 feat: &'tcx rustc_feature::Features,
44 tables: TableBuilders,
45
46 lazy_state: LazyState,
47 span_shorthands: FxHashMap<Span, usize>,
48 type_shorthands: FxHashMap<Ty<'tcx>, usize>,
49 predicate_shorthands: FxHashMap<ty::PredicateKind<'tcx>, usize>,
50
51 interpret_allocs: FxIndexSet<interpret::AllocId>,
52
53 source_file_cache: (Arc<SourceFile>, usize),
57 required_source_files: Option<FxIndexSet<usize>>,
64 is_proc_macro: bool,
65 hygiene_ctxt: &'a HygieneEncodeContext,
66 symbol_table: FxHashMap<Symbol, usize>,
67}
68
69macro_rules! empty_proc_macro {
73 ($self:ident) => {
74 if $self.is_proc_macro {
75 return LazyArray::default();
76 }
77 };
78}
79
80macro_rules! encoder_methods {
81 ($($name:ident($ty:ty);)*) => {
82 $(fn $name(&mut self, value: $ty) {
83 self.opaque.$name(value)
84 })*
85 }
86}
87
88impl<'a, 'tcx> Encoder for EncodeContext<'a, 'tcx> {
89 encoder_methods! {
90 emit_usize(usize);
91 emit_u128(u128);
92 emit_u64(u64);
93 emit_u32(u32);
94 emit_u16(u16);
95 emit_u8(u8);
96
97 emit_isize(isize);
98 emit_i128(i128);
99 emit_i64(i64);
100 emit_i32(i32);
101 emit_i16(i16);
102
103 emit_raw_bytes(&[u8]);
104 }
105}
106
107impl<'a, 'tcx, T> Encodable<EncodeContext<'a, 'tcx>> for LazyValue<T> {
108 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
109 e.emit_lazy_distance(self.position);
110 }
111}
112
113impl<'a, 'tcx, T> Encodable<EncodeContext<'a, 'tcx>> for LazyArray<T> {
114 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
115 e.emit_usize(self.num_elems);
116 if self.num_elems > 0 {
117 e.emit_lazy_distance(self.position)
118 }
119 }
120}
121
122impl<'a, 'tcx, I, T> Encodable<EncodeContext<'a, 'tcx>> for LazyTable<I, T> {
123 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
124 e.emit_usize(self.width);
125 e.emit_usize(self.len);
126 e.emit_lazy_distance(self.position);
127 }
128}
129
130impl<'a, 'tcx> Encodable<EncodeContext<'a, 'tcx>> for ExpnIndex {
131 fn encode(&self, s: &mut EncodeContext<'a, 'tcx>) {
132 s.emit_u32(self.as_u32());
133 }
134}
135
136impl<'a, 'tcx> SpanEncoder for EncodeContext<'a, 'tcx> {
137 fn encode_crate_num(&mut self, crate_num: CrateNum) {
138 if crate_num != LOCAL_CRATE && self.is_proc_macro {
139 panic!("Attempted to encode non-local CrateNum {crate_num:?} for proc-macro crate");
140 }
141 self.emit_u32(crate_num.as_u32());
142 }
143
144 fn encode_def_index(&mut self, def_index: DefIndex) {
145 self.emit_u32(def_index.as_u32());
146 }
147
148 fn encode_def_id(&mut self, def_id: DefId) {
149 def_id.krate.encode(self);
150 def_id.index.encode(self);
151 }
152
153 fn encode_syntax_context(&mut self, syntax_context: SyntaxContext) {
154 rustc_span::hygiene::raw_encode_syntax_context(syntax_context, self.hygiene_ctxt, self);
155 }
156
157 fn encode_expn_id(&mut self, expn_id: ExpnId) {
158 if expn_id.krate == LOCAL_CRATE {
159 self.hygiene_ctxt.schedule_expn_data_for_encoding(expn_id);
164 }
165 expn_id.krate.encode(self);
166 expn_id.local_id.encode(self);
167 }
168
169 fn encode_span(&mut self, span: Span) {
170 match self.span_shorthands.entry(span) {
171 Entry::Occupied(o) => {
172 let last_location = *o.get();
175 let offset = self.opaque.position() - last_location;
178 if offset < last_location {
179 let needed = bytes_needed(offset);
180 SpanTag::indirect(true, needed as u8).encode(self);
181 self.opaque.write_with(|dest| {
182 *dest = offset.to_le_bytes();
183 needed
184 });
185 } else {
186 let needed = bytes_needed(last_location);
187 SpanTag::indirect(false, needed as u8).encode(self);
188 self.opaque.write_with(|dest| {
189 *dest = last_location.to_le_bytes();
190 needed
191 });
192 }
193 }
194 Entry::Vacant(v) => {
195 let position = self.opaque.position();
196 v.insert(position);
197 span.data().encode(self);
199 }
200 }
201 }
202
203 fn encode_symbol(&mut self, symbol: Symbol) {
204 if symbol.is_preinterned() {
206 self.opaque.emit_u8(SYMBOL_PREINTERNED);
207 self.opaque.emit_u32(symbol.as_u32());
208 } else {
209 match self.symbol_table.entry(symbol) {
211 Entry::Vacant(o) => {
212 self.opaque.emit_u8(SYMBOL_STR);
213 let pos = self.opaque.position();
214 o.insert(pos);
215 self.emit_str(symbol.as_str());
216 }
217 Entry::Occupied(o) => {
218 let x = *o.get();
219 self.emit_u8(SYMBOL_OFFSET);
220 self.emit_usize(x);
221 }
222 }
223 }
224 }
225}
226
227fn bytes_needed(n: usize) -> usize {
228 (usize::BITS - n.leading_zeros()).div_ceil(u8::BITS) as usize
229}
230
231impl<'a, 'tcx> Encodable<EncodeContext<'a, 'tcx>> for SpanData {
232 fn encode(&self, s: &mut EncodeContext<'a, 'tcx>) {
233 let ctxt = if s.is_proc_macro { SyntaxContext::root() } else { self.ctxt };
265
266 if self.is_dummy() {
267 let tag = SpanTag::new(SpanKind::Partial, ctxt, 0);
268 tag.encode(s);
269 if tag.context().is_none() {
270 ctxt.encode(s);
271 }
272 return;
273 }
274
275 debug_assert!(self.lo <= self.hi);
277
278 if !s.source_file_cache.0.contains(self.lo) {
279 let source_map = s.tcx.sess.source_map();
280 let source_file_index = source_map.lookup_source_file_idx(self.lo);
281 s.source_file_cache =
282 (Arc::clone(&source_map.files()[source_file_index]), source_file_index);
283 }
284 let (ref source_file, source_file_index) = s.source_file_cache;
285 debug_assert!(source_file.contains(self.lo));
286
287 if !source_file.contains(self.hi) {
288 let tag = SpanTag::new(SpanKind::Partial, ctxt, 0);
291 tag.encode(s);
292 if tag.context().is_none() {
293 ctxt.encode(s);
294 }
295 return;
296 }
297
298 let (kind, metadata_index) = if source_file.is_imported() && !s.is_proc_macro {
315 let metadata_index = {
325 match &*source_file.external_src.read() {
327 ExternalSource::Foreign { metadata_index, .. } => *metadata_index,
328 src => panic!("Unexpected external source {src:?}"),
329 }
330 };
331
332 (SpanKind::Foreign, metadata_index)
333 } else {
334 let source_files =
336 s.required_source_files.as_mut().expect("Already encoded SourceMap!");
337 let (metadata_index, _) = source_files.insert_full(source_file_index);
338 let metadata_index: u32 =
339 metadata_index.try_into().expect("cannot export more than U32_MAX files");
340
341 (SpanKind::Local, metadata_index)
342 };
343
344 let lo = self.lo - source_file.start_pos;
347
348 let len = self.hi - self.lo;
351
352 let tag = SpanTag::new(kind, ctxt, len.0 as usize);
353 tag.encode(s);
354 if tag.context().is_none() {
355 ctxt.encode(s);
356 }
357 lo.encode(s);
358 if tag.length().is_none() {
359 len.encode(s);
360 }
361
362 metadata_index.encode(s);
364
365 if kind == SpanKind::Foreign {
366 let cnum = s.source_file_cache.0.cnum;
369 cnum.encode(s);
370 }
371 }
372}
373
374impl<'a, 'tcx> Encodable<EncodeContext<'a, 'tcx>> for [u8] {
375 fn encode(&self, e: &mut EncodeContext<'a, 'tcx>) {
376 Encoder::emit_usize(e, self.len());
377 e.emit_raw_bytes(self);
378 }
379}
380
381impl<'a, 'tcx> TyEncoder<'tcx> for EncodeContext<'a, 'tcx> {
382 const CLEAR_CROSS_CRATE: bool = true;
383
384 fn position(&self) -> usize {
385 self.opaque.position()
386 }
387
388 fn type_shorthands(&mut self) -> &mut FxHashMap<Ty<'tcx>, usize> {
389 &mut self.type_shorthands
390 }
391
392 fn predicate_shorthands(&mut self) -> &mut FxHashMap<ty::PredicateKind<'tcx>, usize> {
393 &mut self.predicate_shorthands
394 }
395
396 fn encode_alloc_id(&mut self, alloc_id: &rustc_middle::mir::interpret::AllocId) {
397 let (index, _) = self.interpret_allocs.insert_full(*alloc_id);
398
399 index.encode(self);
400 }
401}
402
403macro_rules! record {
406 ($self:ident.$tables:ident.$table:ident[$def_id:expr] <- $value:expr) => {{
407 {
408 let value = $value;
409 let lazy = $self.lazy(value);
410 $self.$tables.$table.set_some($def_id.index, lazy);
411 }
412 }};
413}
414
415macro_rules! record_array {
418 ($self:ident.$tables:ident.$table:ident[$def_id:expr] <- $value:expr) => {{
419 {
420 let value = $value;
421 let lazy = $self.lazy_array(value);
422 $self.$tables.$table.set_some($def_id.index, lazy);
423 }
424 }};
425}
426
427macro_rules! record_defaulted_array {
428 ($self:ident.$tables:ident.$table:ident[$def_id:expr] <- $value:expr) => {{
429 {
430 let value = $value;
431 let lazy = $self.lazy_array(value);
432 $self.$tables.$table.set($def_id.index, lazy);
433 }
434 }};
435}
436
437impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
438 fn emit_lazy_distance(&mut self, position: NonZero<usize>) {
439 let pos = position.get();
440 let distance = match self.lazy_state {
441 LazyState::NoNode => bug!("emit_lazy_distance: outside of a metadata node"),
442 LazyState::NodeStart(start) => {
443 let start = start.get();
444 assert!(pos <= start);
445 start - pos
446 }
447 LazyState::Previous(last_pos) => {
448 assert!(
449 last_pos <= position,
450 "make sure that the calls to `lazy*` \
451 are in the same order as the metadata fields",
452 );
453 position.get() - last_pos.get()
454 }
455 };
456 self.lazy_state = LazyState::Previous(NonZero::new(pos).unwrap());
457 self.emit_usize(distance);
458 }
459
460 fn lazy<T: ParameterizedOverTcx, B: Borrow<T::Value<'tcx>>>(&mut self, value: B) -> LazyValue<T>
461 where
462 T::Value<'tcx>: Encodable<EncodeContext<'a, 'tcx>>,
463 {
464 let pos = NonZero::new(self.position()).unwrap();
465
466 assert_eq!(self.lazy_state, LazyState::NoNode);
467 self.lazy_state = LazyState::NodeStart(pos);
468 value.borrow().encode(self);
469 self.lazy_state = LazyState::NoNode;
470
471 assert!(pos.get() <= self.position());
472
473 LazyValue::from_position(pos)
474 }
475
476 fn lazy_array<T: ParameterizedOverTcx, I: IntoIterator<Item = B>, B: Borrow<T::Value<'tcx>>>(
477 &mut self,
478 values: I,
479 ) -> LazyArray<T>
480 where
481 T::Value<'tcx>: Encodable<EncodeContext<'a, 'tcx>>,
482 {
483 let pos = NonZero::new(self.position()).unwrap();
484
485 assert_eq!(self.lazy_state, LazyState::NoNode);
486 self.lazy_state = LazyState::NodeStart(pos);
487 let len = values.into_iter().map(|value| value.borrow().encode(self)).count();
488 self.lazy_state = LazyState::NoNode;
489
490 assert!(pos.get() <= self.position());
491
492 LazyArray::from_position_and_num_elems(pos, len)
493 }
494
495 fn encode_def_path_table(&mut self) {
496 let table = self.tcx.def_path_table();
497 if self.is_proc_macro {
498 for def_index in std::iter::once(CRATE_DEF_INDEX)
499 .chain(self.tcx.resolutions(()).proc_macros.iter().map(|p| p.local_def_index))
500 {
501 let def_key = self.lazy(table.def_key(def_index));
502 let def_path_hash = table.def_path_hash(def_index);
503 self.tables.def_keys.set_some(def_index, def_key);
504 self.tables.def_path_hashes.set(def_index, def_path_hash.local_hash().as_u64());
505 }
506 } else {
507 for (def_index, def_key, def_path_hash) in table.enumerated_keys_and_path_hashes() {
508 let def_key = self.lazy(def_key);
509 self.tables.def_keys.set_some(def_index, def_key);
510 self.tables.def_path_hashes.set(def_index, def_path_hash.local_hash().as_u64());
511 }
512 }
513 }
514
515 fn encode_def_path_hash_map(&mut self) -> LazyValue<DefPathHashMapRef<'static>> {
516 self.lazy(DefPathHashMapRef::BorrowedFromTcx(self.tcx.def_path_hash_to_def_index_map()))
517 }
518
519 fn encode_source_map(&mut self) -> LazyTable<u32, Option<LazyValue<rustc_span::SourceFile>>> {
520 let source_map = self.tcx.sess.source_map();
521 let all_source_files = source_map.files();
522
523 let required_source_files = self.required_source_files.take().unwrap();
527
528 let working_directory = &self.tcx.sess.opts.working_dir;
529
530 let mut adapted = TableBuilder::default();
531
532 let local_crate_stable_id = self.tcx.stable_crate_id(LOCAL_CRATE);
533
534 for (on_disk_index, &source_file_index) in required_source_files.iter().enumerate() {
539 let source_file = &all_source_files[source_file_index];
540 assert!(!source_file.is_imported() || self.is_proc_macro);
542
543 let mut adapted_source_file = (**source_file).clone();
551
552 match source_file.name {
553 FileName::Real(ref original_file_name) => {
554 let adapted_file_name = source_map
557 .path_mapping()
558 .to_embeddable_absolute_path(original_file_name.clone(), working_directory);
559
560 adapted_source_file.name = FileName::Real(adapted_file_name);
561 }
562 _ => {
563 }
565 };
566
567 if self.is_proc_macro {
574 adapted_source_file.cnum = LOCAL_CRATE;
575 }
576
577 adapted_source_file.stable_id = StableSourceFileId::from_filename_for_export(
581 &adapted_source_file.name,
582 local_crate_stable_id,
583 );
584
585 let on_disk_index: u32 =
586 on_disk_index.try_into().expect("cannot export more than U32_MAX files");
587 adapted.set_some(on_disk_index, self.lazy(adapted_source_file));
588 }
589
590 adapted.encode(&mut self.opaque)
591 }
592
593 fn encode_crate_root(&mut self) -> LazyValue<CrateRoot> {
594 let tcx = self.tcx;
595 let mut stats: Vec<(&'static str, usize)> = Vec::with_capacity(32);
596
597 macro_rules! stat {
598 ($label:literal, $f:expr) => {{
599 let orig_pos = self.position();
600 let res = $f();
601 stats.push(($label, self.position() - orig_pos));
602 res
603 }};
604 }
605
606 stats.push(("preamble", self.position()));
608
609 let (crate_deps, dylib_dependency_formats) =
610 stat!("dep", || (self.encode_crate_deps(), self.encode_dylib_dependency_formats()));
611
612 let lib_features = stat!("lib-features", || self.encode_lib_features());
613
614 let stability_implications =
615 stat!("stability-implications", || self.encode_stability_implications());
616
617 let (lang_items, lang_items_missing) = stat!("lang-items", || {
618 (self.encode_lang_items(), self.encode_lang_items_missing())
619 });
620
621 let stripped_cfg_items = stat!("stripped-cfg-items", || self.encode_stripped_cfg_items());
622
623 let diagnostic_items = stat!("diagnostic-items", || self.encode_diagnostic_items());
624
625 let native_libraries = stat!("native-libs", || self.encode_native_libraries());
626
627 let foreign_modules = stat!("foreign-modules", || self.encode_foreign_modules());
628
629 _ = stat!("def-path-table", || self.encode_def_path_table());
630
631 let traits = stat!("traits", || self.encode_traits());
633
634 let impls = stat!("impls", || self.encode_impls());
636
637 let incoherent_impls = stat!("incoherent-impls", || self.encode_incoherent_impls());
638
639 _ = stat!("mir", || self.encode_mir());
640
641 _ = stat!("def-ids", || self.encode_def_ids());
642
643 let interpret_alloc_index = stat!("interpret-alloc-index", || {
644 let mut interpret_alloc_index = Vec::new();
645 let mut n = 0;
646 trace!("beginning to encode alloc ids");
647 loop {
648 let new_n = self.interpret_allocs.len();
649 if n == new_n {
651 break;
653 }
654 trace!("encoding {} further alloc ids", new_n - n);
655 for idx in n..new_n {
656 let id = self.interpret_allocs[idx];
657 let pos = self.position() as u64;
658 interpret_alloc_index.push(pos);
659 interpret::specialized_encode_alloc_id(self, tcx, id);
660 }
661 n = new_n;
662 }
663 self.lazy_array(interpret_alloc_index)
664 });
665
666 let proc_macro_data = stat!("proc-macro-data", || self.encode_proc_macros());
670
671 let tables = stat!("tables", || self.tables.encode(&mut self.opaque));
672
673 let debugger_visualizers =
674 stat!("debugger-visualizers", || self.encode_debugger_visualizers());
675
676 let exported_symbols = stat!("exported-symbols", || {
678 self.encode_exported_symbols(tcx.exported_symbols(LOCAL_CRATE))
679 });
680
681 let (syntax_contexts, expn_data, expn_hashes) = stat!("hygiene", || self.encode_hygiene());
688
689 let def_path_hash_map = stat!("def-path-hash-map", || self.encode_def_path_hash_map());
690
691 let source_map = stat!("source-map", || self.encode_source_map());
694 let target_modifiers = stat!("target-modifiers", || self.encode_target_modifiers());
695
696 let root = stat!("final", || {
697 let attrs = tcx.hir_krate_attrs();
698 self.lazy(CrateRoot {
699 header: CrateHeader {
700 name: tcx.crate_name(LOCAL_CRATE),
701 triple: tcx.sess.opts.target_triple.clone(),
702 hash: tcx.crate_hash(LOCAL_CRATE),
703 is_proc_macro_crate: proc_macro_data.is_some(),
704 },
705 extra_filename: tcx.sess.opts.cg.extra_filename.clone(),
706 stable_crate_id: tcx.def_path_hash(LOCAL_CRATE.as_def_id()).stable_crate_id(),
707 required_panic_strategy: tcx.required_panic_strategy(LOCAL_CRATE),
708 panic_in_drop_strategy: tcx.sess.opts.unstable_opts.panic_in_drop,
709 edition: tcx.sess.edition(),
710 has_global_allocator: tcx.has_global_allocator(LOCAL_CRATE),
711 has_alloc_error_handler: tcx.has_alloc_error_handler(LOCAL_CRATE),
712 has_panic_handler: tcx.has_panic_handler(LOCAL_CRATE),
713 has_default_lib_allocator: ast::attr::contains_name(
714 attrs,
715 sym::default_lib_allocator,
716 ),
717 proc_macro_data,
718 debugger_visualizers,
719 compiler_builtins: ast::attr::contains_name(attrs, sym::compiler_builtins),
720 needs_allocator: ast::attr::contains_name(attrs, sym::needs_allocator),
721 needs_panic_runtime: ast::attr::contains_name(attrs, sym::needs_panic_runtime),
722 no_builtins: ast::attr::contains_name(attrs, sym::no_builtins),
723 panic_runtime: ast::attr::contains_name(attrs, sym::panic_runtime),
724 profiler_runtime: ast::attr::contains_name(attrs, sym::profiler_runtime),
725 symbol_mangling_version: tcx.sess.opts.get_symbol_mangling_version(),
726
727 crate_deps,
728 dylib_dependency_formats,
729 lib_features,
730 stability_implications,
731 lang_items,
732 diagnostic_items,
733 lang_items_missing,
734 stripped_cfg_items,
735 native_libraries,
736 foreign_modules,
737 source_map,
738 target_modifiers,
739 traits,
740 impls,
741 incoherent_impls,
742 exported_symbols,
743 interpret_alloc_index,
744 tables,
745 syntax_contexts,
746 expn_data,
747 expn_hashes,
748 def_path_hash_map,
749 specialization_enabled_in: tcx.specialization_enabled_in(LOCAL_CRATE),
750 })
751 });
752
753 let total_bytes = self.position();
754
755 let computed_total_bytes: usize = stats.iter().map(|(_, size)| size).sum();
756 assert_eq!(total_bytes, computed_total_bytes);
757
758 if tcx.sess.opts.unstable_opts.meta_stats {
759 self.opaque.flush();
760
761 let pos_before_rewind = self.opaque.file().stream_position().unwrap();
763 let mut zero_bytes = 0;
764 self.opaque.file().rewind().unwrap();
765 let file = std::io::BufReader::new(self.opaque.file());
766 for e in file.bytes() {
767 if e.unwrap() == 0 {
768 zero_bytes += 1;
769 }
770 }
771 assert_eq!(self.opaque.file().stream_position().unwrap(), pos_before_rewind);
772
773 stats.sort_by_key(|&(_, usize)| usize);
774
775 let prefix = "meta-stats";
776 let perc = |bytes| (bytes * 100) as f64 / total_bytes as f64;
777
778 eprintln!("{prefix} METADATA STATS");
779 eprintln!("{} {:<23}{:>10}", prefix, "Section", "Size");
780 eprintln!("{prefix} ----------------------------------------------------------------");
781 for (label, size) in stats {
782 eprintln!(
783 "{} {:<23}{:>10} ({:4.1}%)",
784 prefix,
785 label,
786 format_with_underscores(size),
787 perc(size)
788 );
789 }
790 eprintln!("{prefix} ----------------------------------------------------------------");
791 eprintln!(
792 "{} {:<23}{:>10} (of which {:.1}% are zero bytes)",
793 prefix,
794 "Total",
795 format_with_underscores(total_bytes),
796 perc(zero_bytes)
797 );
798 eprintln!("{prefix}");
799 }
800
801 root
802 }
803}
804
805struct AnalyzeAttrState<'a> {
806 is_exported: bool,
807 is_doc_hidden: bool,
808 features: &'a Features,
809}
810
811#[inline]
821fn analyze_attr(attr: &impl AttributeExt, state: &mut AnalyzeAttrState<'_>) -> bool {
822 let mut should_encode = false;
823 if !rustc_feature::encode_cross_crate(attr.name_or_empty()) {
824 } else if attr.doc_str().is_some() {
826 if state.is_exported {
830 should_encode = true;
831 }
832 } else if attr.has_name(sym::doc) {
833 if let Some(item_list) = attr.meta_item_list() {
836 for item in item_list {
837 if !item.has_name(sym::inline) {
838 should_encode = true;
839 if item.has_name(sym::hidden) {
840 state.is_doc_hidden = true;
841 break;
842 }
843 }
844 }
845 }
846 } else if attr.path().starts_with(&[sym::diagnostic]) && attr.path().len() == 2 {
847 should_encode =
848 rustc_feature::is_stable_diagnostic_attribute(attr.path()[1], state.features);
849 } else {
850 should_encode = true;
851 }
852 should_encode
853}
854
855fn should_encode_span(def_kind: DefKind) -> bool {
856 match def_kind {
857 DefKind::Mod
858 | DefKind::Struct
859 | DefKind::Union
860 | DefKind::Enum
861 | DefKind::Variant
862 | DefKind::Trait
863 | DefKind::TyAlias
864 | DefKind::ForeignTy
865 | DefKind::TraitAlias
866 | DefKind::AssocTy
867 | DefKind::TyParam
868 | DefKind::ConstParam
869 | DefKind::LifetimeParam
870 | DefKind::Fn
871 | DefKind::Const
872 | DefKind::Static { .. }
873 | DefKind::Ctor(..)
874 | DefKind::AssocFn
875 | DefKind::AssocConst
876 | DefKind::Macro(_)
877 | DefKind::ExternCrate
878 | DefKind::Use
879 | DefKind::AnonConst
880 | DefKind::InlineConst
881 | DefKind::OpaqueTy
882 | DefKind::Field
883 | DefKind::Impl { .. }
884 | DefKind::Closure
885 | DefKind::SyntheticCoroutineBody => true,
886 DefKind::ForeignMod | DefKind::GlobalAsm => false,
887 }
888}
889
890fn should_encode_attrs(def_kind: DefKind) -> bool {
891 match def_kind {
892 DefKind::Mod
893 | DefKind::Struct
894 | DefKind::Union
895 | DefKind::Enum
896 | DefKind::Variant
897 | DefKind::Trait
898 | DefKind::TyAlias
899 | DefKind::ForeignTy
900 | DefKind::TraitAlias
901 | DefKind::AssocTy
902 | DefKind::Fn
903 | DefKind::Const
904 | DefKind::Static { nested: false, .. }
905 | DefKind::AssocFn
906 | DefKind::AssocConst
907 | DefKind::Macro(_)
908 | DefKind::Field
909 | DefKind::Impl { .. } => true,
910 DefKind::Closure => true,
915 DefKind::SyntheticCoroutineBody => false,
916 DefKind::TyParam
917 | DefKind::ConstParam
918 | DefKind::Ctor(..)
919 | DefKind::ExternCrate
920 | DefKind::Use
921 | DefKind::ForeignMod
922 | DefKind::AnonConst
923 | DefKind::InlineConst
924 | DefKind::OpaqueTy
925 | DefKind::LifetimeParam
926 | DefKind::Static { nested: true, .. }
927 | DefKind::GlobalAsm => false,
928 }
929}
930
931fn should_encode_expn_that_defined(def_kind: DefKind) -> bool {
932 match def_kind {
933 DefKind::Mod
934 | DefKind::Struct
935 | DefKind::Union
936 | DefKind::Enum
937 | DefKind::Variant
938 | DefKind::Trait
939 | DefKind::Impl { .. } => true,
940 DefKind::TyAlias
941 | DefKind::ForeignTy
942 | DefKind::TraitAlias
943 | DefKind::AssocTy
944 | DefKind::TyParam
945 | DefKind::Fn
946 | DefKind::Const
947 | DefKind::ConstParam
948 | DefKind::Static { .. }
949 | DefKind::Ctor(..)
950 | DefKind::AssocFn
951 | DefKind::AssocConst
952 | DefKind::Macro(_)
953 | DefKind::ExternCrate
954 | DefKind::Use
955 | DefKind::ForeignMod
956 | DefKind::AnonConst
957 | DefKind::InlineConst
958 | DefKind::OpaqueTy
959 | DefKind::Field
960 | DefKind::LifetimeParam
961 | DefKind::GlobalAsm
962 | DefKind::Closure
963 | DefKind::SyntheticCoroutineBody => false,
964 }
965}
966
967fn should_encode_visibility(def_kind: DefKind) -> bool {
968 match def_kind {
969 DefKind::Mod
970 | DefKind::Struct
971 | DefKind::Union
972 | DefKind::Enum
973 | DefKind::Variant
974 | DefKind::Trait
975 | DefKind::TyAlias
976 | DefKind::ForeignTy
977 | DefKind::TraitAlias
978 | DefKind::AssocTy
979 | DefKind::Fn
980 | DefKind::Const
981 | DefKind::Static { nested: false, .. }
982 | DefKind::Ctor(..)
983 | DefKind::AssocFn
984 | DefKind::AssocConst
985 | DefKind::Macro(..)
986 | DefKind::Field => true,
987 DefKind::Use
988 | DefKind::ForeignMod
989 | DefKind::TyParam
990 | DefKind::ConstParam
991 | DefKind::LifetimeParam
992 | DefKind::AnonConst
993 | DefKind::InlineConst
994 | DefKind::Static { nested: true, .. }
995 | DefKind::OpaqueTy
996 | DefKind::GlobalAsm
997 | DefKind::Impl { .. }
998 | DefKind::Closure
999 | DefKind::ExternCrate
1000 | DefKind::SyntheticCoroutineBody => false,
1001 }
1002}
1003
1004fn should_encode_stability(def_kind: DefKind) -> bool {
1005 match def_kind {
1006 DefKind::Mod
1007 | DefKind::Ctor(..)
1008 | DefKind::Variant
1009 | DefKind::Field
1010 | DefKind::Struct
1011 | DefKind::AssocTy
1012 | DefKind::AssocFn
1013 | DefKind::AssocConst
1014 | DefKind::TyParam
1015 | DefKind::ConstParam
1016 | DefKind::Static { .. }
1017 | DefKind::Const
1018 | DefKind::Fn
1019 | DefKind::ForeignMod
1020 | DefKind::TyAlias
1021 | DefKind::OpaqueTy
1022 | DefKind::Enum
1023 | DefKind::Union
1024 | DefKind::Impl { .. }
1025 | DefKind::Trait
1026 | DefKind::TraitAlias
1027 | DefKind::Macro(..)
1028 | DefKind::ForeignTy => true,
1029 DefKind::Use
1030 | DefKind::LifetimeParam
1031 | DefKind::AnonConst
1032 | DefKind::InlineConst
1033 | DefKind::GlobalAsm
1034 | DefKind::Closure
1035 | DefKind::ExternCrate
1036 | DefKind::SyntheticCoroutineBody => false,
1037 }
1038}
1039
1040fn should_encode_mir(
1061 tcx: TyCtxt<'_>,
1062 reachable_set: &LocalDefIdSet,
1063 def_id: LocalDefId,
1064) -> (bool, bool) {
1065 match tcx.def_kind(def_id) {
1066 DefKind::Ctor(_, _) => {
1068 let mir_opt_base = tcx.sess.opts.output_types.should_codegen()
1069 || tcx.sess.opts.unstable_opts.always_encode_mir;
1070 (true, mir_opt_base)
1071 }
1072 DefKind::AnonConst | DefKind::InlineConst | DefKind::AssocConst | DefKind::Const => {
1074 (true, false)
1075 }
1076 DefKind::Closure if tcx.is_coroutine(def_id.to_def_id()) => (false, true),
1078 DefKind::SyntheticCoroutineBody => (false, true),
1079 DefKind::AssocFn | DefKind::Fn | DefKind::Closure => {
1081 let generics = tcx.generics_of(def_id);
1082 let opt = tcx.sess.opts.unstable_opts.always_encode_mir
1083 || (tcx.sess.opts.output_types.should_codegen()
1084 && reachable_set.contains(&def_id)
1085 && (generics.requires_monomorphization(tcx)
1086 || tcx.cross_crate_inlinable(def_id)));
1087 let is_const_fn = tcx.is_const_fn(def_id.to_def_id())
1089 || tcx.is_const_default_method(def_id.to_def_id());
1090 (is_const_fn, opt)
1091 }
1092 _ => (false, false),
1094 }
1095}
1096
1097fn should_encode_variances<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId, def_kind: DefKind) -> bool {
1098 match def_kind {
1099 DefKind::Struct
1100 | DefKind::Union
1101 | DefKind::Enum
1102 | DefKind::Variant
1103 | DefKind::OpaqueTy
1104 | DefKind::Fn
1105 | DefKind::Ctor(..)
1106 | DefKind::AssocFn => true,
1107 DefKind::AssocTy => {
1108 matches!(tcx.opt_rpitit_info(def_id), Some(ty::ImplTraitInTraitData::Trait { .. }))
1110 }
1111 DefKind::Mod
1112 | DefKind::Field
1113 | DefKind::AssocConst
1114 | DefKind::TyParam
1115 | DefKind::ConstParam
1116 | DefKind::Static { .. }
1117 | DefKind::Const
1118 | DefKind::ForeignMod
1119 | DefKind::Impl { .. }
1120 | DefKind::Trait
1121 | DefKind::TraitAlias
1122 | DefKind::Macro(..)
1123 | DefKind::ForeignTy
1124 | DefKind::Use
1125 | DefKind::LifetimeParam
1126 | DefKind::AnonConst
1127 | DefKind::InlineConst
1128 | DefKind::GlobalAsm
1129 | DefKind::Closure
1130 | DefKind::ExternCrate
1131 | DefKind::SyntheticCoroutineBody => false,
1132 DefKind::TyAlias => tcx.type_alias_is_lazy(def_id),
1133 }
1134}
1135
1136fn should_encode_generics(def_kind: DefKind) -> bool {
1137 match def_kind {
1138 DefKind::Struct
1139 | DefKind::Union
1140 | DefKind::Enum
1141 | DefKind::Variant
1142 | DefKind::Trait
1143 | DefKind::TyAlias
1144 | DefKind::ForeignTy
1145 | DefKind::TraitAlias
1146 | DefKind::AssocTy
1147 | DefKind::Fn
1148 | DefKind::Const
1149 | DefKind::Static { .. }
1150 | DefKind::Ctor(..)
1151 | DefKind::AssocFn
1152 | DefKind::AssocConst
1153 | DefKind::AnonConst
1154 | DefKind::InlineConst
1155 | DefKind::OpaqueTy
1156 | DefKind::Impl { .. }
1157 | DefKind::Field
1158 | DefKind::TyParam
1159 | DefKind::Closure
1160 | DefKind::SyntheticCoroutineBody => true,
1161 DefKind::Mod
1162 | DefKind::ForeignMod
1163 | DefKind::ConstParam
1164 | DefKind::Macro(..)
1165 | DefKind::Use
1166 | DefKind::LifetimeParam
1167 | DefKind::GlobalAsm
1168 | DefKind::ExternCrate => false,
1169 }
1170}
1171
1172fn should_encode_type(tcx: TyCtxt<'_>, def_id: LocalDefId, def_kind: DefKind) -> bool {
1173 match def_kind {
1174 DefKind::Struct
1175 | DefKind::Union
1176 | DefKind::Enum
1177 | DefKind::Variant
1178 | DefKind::Ctor(..)
1179 | DefKind::Field
1180 | DefKind::Fn
1181 | DefKind::Const
1182 | DefKind::Static { nested: false, .. }
1183 | DefKind::TyAlias
1184 | DefKind::ForeignTy
1185 | DefKind::Impl { .. }
1186 | DefKind::AssocFn
1187 | DefKind::AssocConst
1188 | DefKind::Closure
1189 | DefKind::ConstParam
1190 | DefKind::AnonConst
1191 | DefKind::InlineConst
1192 | DefKind::SyntheticCoroutineBody => true,
1193
1194 DefKind::OpaqueTy => {
1195 let origin = tcx.local_opaque_ty_origin(def_id);
1196 if let hir::OpaqueTyOrigin::FnReturn { parent, .. }
1197 | hir::OpaqueTyOrigin::AsyncFn { parent, .. } = origin
1198 && let hir::Node::TraitItem(trait_item) = tcx.hir_node_by_def_id(parent)
1199 && let (_, hir::TraitFn::Required(..)) = trait_item.expect_fn()
1200 {
1201 false
1202 } else {
1203 true
1204 }
1205 }
1206
1207 DefKind::AssocTy => {
1208 let assoc_item = tcx.associated_item(def_id);
1209 match assoc_item.container {
1210 ty::AssocItemContainer::Impl => true,
1211 ty::AssocItemContainer::Trait => assoc_item.defaultness(tcx).has_value(),
1212 }
1213 }
1214 DefKind::TyParam => {
1215 let hir::Node::GenericParam(param) = tcx.hir_node_by_def_id(def_id) else { bug!() };
1216 let hir::GenericParamKind::Type { default, .. } = param.kind else { bug!() };
1217 default.is_some()
1218 }
1219
1220 DefKind::Trait
1221 | DefKind::TraitAlias
1222 | DefKind::Mod
1223 | DefKind::ForeignMod
1224 | DefKind::Macro(..)
1225 | DefKind::Static { nested: true, .. }
1226 | DefKind::Use
1227 | DefKind::LifetimeParam
1228 | DefKind::GlobalAsm
1229 | DefKind::ExternCrate => false,
1230 }
1231}
1232
1233fn should_encode_fn_sig(def_kind: DefKind) -> bool {
1234 match def_kind {
1235 DefKind::Fn | DefKind::AssocFn | DefKind::Ctor(_, CtorKind::Fn) => true,
1236
1237 DefKind::Struct
1238 | DefKind::Union
1239 | DefKind::Enum
1240 | DefKind::Variant
1241 | DefKind::Field
1242 | DefKind::Const
1243 | DefKind::Static { .. }
1244 | DefKind::Ctor(..)
1245 | DefKind::TyAlias
1246 | DefKind::OpaqueTy
1247 | DefKind::ForeignTy
1248 | DefKind::Impl { .. }
1249 | DefKind::AssocConst
1250 | DefKind::Closure
1251 | DefKind::ConstParam
1252 | DefKind::AnonConst
1253 | DefKind::InlineConst
1254 | DefKind::AssocTy
1255 | DefKind::TyParam
1256 | DefKind::Trait
1257 | DefKind::TraitAlias
1258 | DefKind::Mod
1259 | DefKind::ForeignMod
1260 | DefKind::Macro(..)
1261 | DefKind::Use
1262 | DefKind::LifetimeParam
1263 | DefKind::GlobalAsm
1264 | DefKind::ExternCrate
1265 | DefKind::SyntheticCoroutineBody => false,
1266 }
1267}
1268
1269fn should_encode_constness(def_kind: DefKind) -> bool {
1270 match def_kind {
1271 DefKind::Fn | DefKind::AssocFn | DefKind::Closure | DefKind::Ctor(_, CtorKind::Fn) => true,
1272
1273 DefKind::Struct
1274 | DefKind::Union
1275 | DefKind::Enum
1276 | DefKind::Field
1277 | DefKind::Const
1278 | DefKind::AssocConst
1279 | DefKind::AnonConst
1280 | DefKind::Static { .. }
1281 | DefKind::TyAlias
1282 | DefKind::OpaqueTy
1283 | DefKind::Impl { .. }
1284 | DefKind::ForeignTy
1285 | DefKind::ConstParam
1286 | DefKind::InlineConst
1287 | DefKind::AssocTy
1288 | DefKind::TyParam
1289 | DefKind::Trait
1290 | DefKind::TraitAlias
1291 | DefKind::Mod
1292 | DefKind::ForeignMod
1293 | DefKind::Macro(..)
1294 | DefKind::Use
1295 | DefKind::LifetimeParam
1296 | DefKind::GlobalAsm
1297 | DefKind::ExternCrate
1298 | DefKind::Ctor(_, CtorKind::Const)
1299 | DefKind::Variant
1300 | DefKind::SyntheticCoroutineBody => false,
1301 }
1302}
1303
1304fn should_encode_const(def_kind: DefKind) -> bool {
1305 match def_kind {
1306 DefKind::Const | DefKind::AssocConst | DefKind::AnonConst | DefKind::InlineConst => true,
1307
1308 DefKind::Struct
1309 | DefKind::Union
1310 | DefKind::Enum
1311 | DefKind::Variant
1312 | DefKind::Ctor(..)
1313 | DefKind::Field
1314 | DefKind::Fn
1315 | DefKind::Static { .. }
1316 | DefKind::TyAlias
1317 | DefKind::OpaqueTy
1318 | DefKind::ForeignTy
1319 | DefKind::Impl { .. }
1320 | DefKind::AssocFn
1321 | DefKind::Closure
1322 | DefKind::ConstParam
1323 | DefKind::AssocTy
1324 | DefKind::TyParam
1325 | DefKind::Trait
1326 | DefKind::TraitAlias
1327 | DefKind::Mod
1328 | DefKind::ForeignMod
1329 | DefKind::Macro(..)
1330 | DefKind::Use
1331 | DefKind::LifetimeParam
1332 | DefKind::GlobalAsm
1333 | DefKind::ExternCrate
1334 | DefKind::SyntheticCoroutineBody => false,
1335 }
1336}
1337
1338fn should_encode_fn_impl_trait_in_trait<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> bool {
1339 if let Some(assoc_item) = tcx.opt_associated_item(def_id)
1340 && assoc_item.container == ty::AssocItemContainer::Trait
1341 && assoc_item.kind == ty::AssocKind::Fn
1342 {
1343 true
1344 } else {
1345 false
1346 }
1347}
1348
1349impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
1350 fn encode_attrs(&mut self, def_id: LocalDefId) {
1351 let tcx = self.tcx;
1352 let mut state = AnalyzeAttrState {
1353 is_exported: tcx.effective_visibilities(()).is_exported(def_id),
1354 is_doc_hidden: false,
1355 features: &tcx.features(),
1356 };
1357 let attr_iter = tcx
1358 .hir_attrs(tcx.local_def_id_to_hir_id(def_id))
1359 .iter()
1360 .filter(|attr| analyze_attr(*attr, &mut state));
1361
1362 record_array!(self.tables.attributes[def_id.to_def_id()] <- attr_iter);
1363
1364 let mut attr_flags = AttrFlags::empty();
1365 if state.is_doc_hidden {
1366 attr_flags |= AttrFlags::IS_DOC_HIDDEN;
1367 }
1368 self.tables.attr_flags.set(def_id.local_def_index, attr_flags);
1369 }
1370
1371 fn encode_def_ids(&mut self) {
1372 self.encode_info_for_mod(CRATE_DEF_ID);
1373
1374 if self.is_proc_macro {
1377 return;
1378 }
1379
1380 let tcx = self.tcx;
1381
1382 for local_id in tcx.iter_local_def_id() {
1383 let def_id = local_id.to_def_id();
1384 let def_kind = tcx.def_kind(local_id);
1385 self.tables.def_kind.set_some(def_id.index, def_kind);
1386
1387 if def_kind == DefKind::AnonConst
1392 && match tcx.hir_node_by_def_id(local_id) {
1393 hir::Node::ConstArg(hir::ConstArg { kind, .. }) => match kind {
1394 hir::ConstArgKind::Path(..) | hir::ConstArgKind::Infer(..) => true,
1396 hir::ConstArgKind::Anon(..) => false,
1397 },
1398 _ => false,
1399 }
1400 {
1401 continue;
1402 }
1403
1404 if def_kind == DefKind::Field
1405 && let hir::Node::Field(field) = tcx.hir_node_by_def_id(local_id)
1406 && let Some(anon) = field.default
1407 {
1408 record!(self.tables.default_fields[def_id] <- anon.def_id.to_def_id());
1409 }
1410
1411 if should_encode_span(def_kind) {
1412 let def_span = tcx.def_span(local_id);
1413 record!(self.tables.def_span[def_id] <- def_span);
1414 }
1415 if should_encode_attrs(def_kind) {
1416 self.encode_attrs(local_id);
1417 }
1418 if should_encode_expn_that_defined(def_kind) {
1419 record!(self.tables.expn_that_defined[def_id] <- self.tcx.expn_that_defined(def_id));
1420 }
1421 if should_encode_span(def_kind)
1422 && let Some(ident_span) = tcx.def_ident_span(def_id)
1423 {
1424 record!(self.tables.def_ident_span[def_id] <- ident_span);
1425 }
1426 if def_kind.has_codegen_attrs() {
1427 record!(self.tables.codegen_fn_attrs[def_id] <- self.tcx.codegen_fn_attrs(def_id));
1428 }
1429 if should_encode_visibility(def_kind) {
1430 let vis =
1431 self.tcx.local_visibility(local_id).map_id(|def_id| def_id.local_def_index);
1432 record!(self.tables.visibility[def_id] <- vis);
1433 }
1434 if should_encode_stability(def_kind) {
1435 self.encode_stability(def_id);
1436 self.encode_const_stability(def_id);
1437 self.encode_default_body_stability(def_id);
1438 self.encode_deprecation(def_id);
1439 }
1440 if should_encode_variances(tcx, def_id, def_kind) {
1441 let v = self.tcx.variances_of(def_id);
1442 record_array!(self.tables.variances_of[def_id] <- v);
1443 }
1444 if should_encode_fn_sig(def_kind) {
1445 record!(self.tables.fn_sig[def_id] <- tcx.fn_sig(def_id));
1446 }
1447 if should_encode_generics(def_kind) {
1448 let g = tcx.generics_of(def_id);
1449 record!(self.tables.generics_of[def_id] <- g);
1450 record!(self.tables.explicit_predicates_of[def_id] <- self.tcx.explicit_predicates_of(def_id));
1451 let inferred_outlives = self.tcx.inferred_outlives_of(def_id);
1452 record_defaulted_array!(self.tables.inferred_outlives_of[def_id] <- inferred_outlives);
1453
1454 for param in &g.own_params {
1455 if let ty::GenericParamDefKind::Const { has_default: true, .. } = param.kind {
1456 let default = self.tcx.const_param_default(param.def_id);
1457 record!(self.tables.const_param_default[param.def_id] <- default);
1458 }
1459 }
1460 }
1461 if tcx.is_conditionally_const(def_id) {
1462 record!(self.tables.const_conditions[def_id] <- self.tcx.const_conditions(def_id));
1463 }
1464 if should_encode_type(tcx, local_id, def_kind) {
1465 record!(self.tables.type_of[def_id] <- self.tcx.type_of(def_id));
1466 }
1467 if should_encode_constness(def_kind) {
1468 self.tables.constness.set_some(def_id.index, self.tcx.constness(def_id));
1469 }
1470 if let DefKind::Fn | DefKind::AssocFn = def_kind {
1471 self.tables.asyncness.set_some(def_id.index, tcx.asyncness(def_id));
1472 record_array!(self.tables.fn_arg_names[def_id] <- tcx.fn_arg_names(def_id));
1473 }
1474 if let Some(name) = tcx.intrinsic(def_id) {
1475 record!(self.tables.intrinsic[def_id] <- name);
1476 }
1477 if let DefKind::TyParam = def_kind {
1478 let default = self.tcx.object_lifetime_default(def_id);
1479 record!(self.tables.object_lifetime_default[def_id] <- default);
1480 }
1481 if let DefKind::Trait = def_kind {
1482 record!(self.tables.trait_def[def_id] <- self.tcx.trait_def(def_id));
1483 record_defaulted_array!(self.tables.explicit_super_predicates_of[def_id] <-
1484 self.tcx.explicit_super_predicates_of(def_id).skip_binder());
1485 record_defaulted_array!(self.tables.explicit_implied_predicates_of[def_id] <-
1486 self.tcx.explicit_implied_predicates_of(def_id).skip_binder());
1487 let module_children = self.tcx.module_children_local(local_id);
1488 record_array!(self.tables.module_children_non_reexports[def_id] <-
1489 module_children.iter().map(|child| child.res.def_id().index));
1490 if self.tcx.is_const_trait(def_id) {
1491 record_defaulted_array!(self.tables.explicit_implied_const_bounds[def_id]
1492 <- self.tcx.explicit_implied_const_bounds(def_id).skip_binder());
1493 }
1494 }
1495 if let DefKind::TraitAlias = def_kind {
1496 record!(self.tables.trait_def[def_id] <- self.tcx.trait_def(def_id));
1497 record_defaulted_array!(self.tables.explicit_super_predicates_of[def_id] <-
1498 self.tcx.explicit_super_predicates_of(def_id).skip_binder());
1499 record_defaulted_array!(self.tables.explicit_implied_predicates_of[def_id] <-
1500 self.tcx.explicit_implied_predicates_of(def_id).skip_binder());
1501 }
1502 if let DefKind::Trait | DefKind::Impl { .. } = def_kind {
1503 let associated_item_def_ids = self.tcx.associated_item_def_ids(def_id);
1504 record_array!(self.tables.associated_item_or_field_def_ids[def_id] <-
1505 associated_item_def_ids.iter().map(|&def_id| {
1506 assert!(def_id.is_local());
1507 def_id.index
1508 })
1509 );
1510 for &def_id in associated_item_def_ids {
1511 self.encode_info_for_assoc_item(def_id);
1512 }
1513 }
1514 if let DefKind::Closure | DefKind::SyntheticCoroutineBody = def_kind
1515 && let Some(coroutine_kind) = self.tcx.coroutine_kind(def_id)
1516 {
1517 self.tables.coroutine_kind.set(def_id.index, Some(coroutine_kind))
1518 }
1519 if def_kind == DefKind::Closure
1520 && tcx.type_of(def_id).skip_binder().is_coroutine_closure()
1521 {
1522 let coroutine_for_closure = self.tcx.coroutine_for_closure(def_id);
1523 self.tables
1524 .coroutine_for_closure
1525 .set_some(def_id.index, coroutine_for_closure.into());
1526
1527 if tcx.needs_coroutine_by_move_body_def_id(coroutine_for_closure) {
1529 self.tables.coroutine_by_move_body_def_id.set_some(
1530 coroutine_for_closure.index,
1531 self.tcx.coroutine_by_move_body_def_id(coroutine_for_closure).into(),
1532 );
1533 }
1534 }
1535 if let DefKind::Static { .. } = def_kind {
1536 if !self.tcx.is_foreign_item(def_id) {
1537 let data = self.tcx.eval_static_initializer(def_id).unwrap();
1538 record!(self.tables.eval_static_initializer[def_id] <- data);
1539 }
1540 }
1541 if let DefKind::Enum | DefKind::Struct | DefKind::Union = def_kind {
1542 self.encode_info_for_adt(local_id);
1543 }
1544 if let DefKind::Mod = def_kind {
1545 self.encode_info_for_mod(local_id);
1546 }
1547 if let DefKind::Macro(_) = def_kind {
1548 self.encode_info_for_macro(local_id);
1549 }
1550 if let DefKind::TyAlias = def_kind {
1551 self.tables
1552 .type_alias_is_lazy
1553 .set(def_id.index, self.tcx.type_alias_is_lazy(def_id));
1554 }
1555 if let DefKind::OpaqueTy = def_kind {
1556 self.encode_explicit_item_bounds(def_id);
1557 self.encode_explicit_item_self_bounds(def_id);
1558 record!(self.tables.opaque_ty_origin[def_id] <- self.tcx.opaque_ty_origin(def_id));
1559 self.encode_precise_capturing_args(def_id);
1560 if tcx.is_conditionally_const(def_id) {
1561 record_defaulted_array!(self.tables.explicit_implied_const_bounds[def_id]
1562 <- tcx.explicit_implied_const_bounds(def_id).skip_binder());
1563 }
1564 }
1565 if tcx.impl_method_has_trait_impl_trait_tys(def_id)
1566 && let Ok(table) = self.tcx.collect_return_position_impl_trait_in_trait_tys(def_id)
1567 {
1568 record!(self.tables.trait_impl_trait_tys[def_id] <- table);
1569 }
1570 if should_encode_fn_impl_trait_in_trait(tcx, def_id) {
1571 let table = tcx.associated_types_for_impl_traits_in_associated_fn(def_id);
1572 record_defaulted_array!(self.tables.associated_types_for_impl_traits_in_associated_fn[def_id] <- table);
1573 }
1574 }
1575
1576 for (def_id, impls) in &tcx.crate_inherent_impls(()).0.inherent_impls {
1577 record_defaulted_array!(self.tables.inherent_impls[def_id.to_def_id()] <- impls.iter().map(|def_id| {
1578 assert!(def_id.is_local());
1579 def_id.index
1580 }));
1581 }
1582
1583 for (def_id, res_map) in &tcx.resolutions(()).doc_link_resolutions {
1584 record!(self.tables.doc_link_resolutions[def_id.to_def_id()] <- res_map);
1585 }
1586
1587 for (def_id, traits) in &tcx.resolutions(()).doc_link_traits_in_scope {
1588 record_array!(self.tables.doc_link_traits_in_scope[def_id.to_def_id()] <- traits);
1589 }
1590 }
1591
1592 #[instrument(level = "trace", skip(self))]
1593 fn encode_info_for_adt(&mut self, local_def_id: LocalDefId) {
1594 let def_id = local_def_id.to_def_id();
1595 let tcx = self.tcx;
1596 let adt_def = tcx.adt_def(def_id);
1597 record!(self.tables.repr_options[def_id] <- adt_def.repr());
1598
1599 let params_in_repr = self.tcx.params_in_repr(def_id);
1600 record!(self.tables.params_in_repr[def_id] <- params_in_repr);
1601
1602 if adt_def.is_enum() {
1603 let module_children = tcx.module_children_local(local_def_id);
1604 record_array!(self.tables.module_children_non_reexports[def_id] <-
1605 module_children.iter().map(|child| child.res.def_id().index));
1606 } else {
1607 debug_assert_eq!(adt_def.variants().len(), 1);
1609 debug_assert_eq!(adt_def.non_enum_variant().def_id, def_id);
1610 }
1612
1613 for (idx, variant) in adt_def.variants().iter_enumerated() {
1614 let data = VariantData {
1615 discr: variant.discr,
1616 idx,
1617 ctor: variant.ctor.map(|(kind, def_id)| (kind, def_id.index)),
1618 is_non_exhaustive: variant.is_field_list_non_exhaustive(),
1619 };
1620 record!(self.tables.variant_data[variant.def_id] <- data);
1621
1622 record_array!(self.tables.associated_item_or_field_def_ids[variant.def_id] <- variant.fields.iter().map(|f| {
1623 assert!(f.did.is_local());
1624 f.did.index
1625 }));
1626
1627 for field in &variant.fields {
1628 self.tables.safety.set_some(field.did.index, field.safety);
1629 }
1630
1631 if let Some((CtorKind::Fn, ctor_def_id)) = variant.ctor {
1632 let fn_sig = tcx.fn_sig(ctor_def_id);
1633 record!(self.tables.fn_sig[variant.def_id] <- fn_sig);
1635 }
1636 }
1637 }
1638
1639 #[instrument(level = "debug", skip(self))]
1640 fn encode_info_for_mod(&mut self, local_def_id: LocalDefId) {
1641 let tcx = self.tcx;
1642 let def_id = local_def_id.to_def_id();
1643
1644 if self.is_proc_macro {
1650 record!(self.tables.expn_that_defined[def_id] <- tcx.expn_that_defined(local_def_id));
1652 } else {
1653 let module_children = tcx.module_children_local(local_def_id);
1654
1655 record_array!(self.tables.module_children_non_reexports[def_id] <-
1656 module_children.iter().filter(|child| child.reexport_chain.is_empty())
1657 .map(|child| child.res.def_id().index));
1658
1659 record_defaulted_array!(self.tables.module_children_reexports[def_id] <-
1660 module_children.iter().filter(|child| !child.reexport_chain.is_empty()));
1661 }
1662 }
1663
1664 fn encode_explicit_item_bounds(&mut self, def_id: DefId) {
1665 debug!("EncodeContext::encode_explicit_item_bounds({:?})", def_id);
1666 let bounds = self.tcx.explicit_item_bounds(def_id).skip_binder();
1667 record_defaulted_array!(self.tables.explicit_item_bounds[def_id] <- bounds);
1668 }
1669
1670 fn encode_explicit_item_self_bounds(&mut self, def_id: DefId) {
1671 debug!("EncodeContext::encode_explicit_item_self_bounds({:?})", def_id);
1672 let bounds = self.tcx.explicit_item_self_bounds(def_id).skip_binder();
1673 record_defaulted_array!(self.tables.explicit_item_self_bounds[def_id] <- bounds);
1674 }
1675
1676 #[instrument(level = "debug", skip(self))]
1677 fn encode_info_for_assoc_item(&mut self, def_id: DefId) {
1678 let tcx = self.tcx;
1679 let item = tcx.associated_item(def_id);
1680
1681 self.tables.defaultness.set_some(def_id.index, item.defaultness(tcx));
1682 self.tables.assoc_container.set_some(def_id.index, item.container);
1683
1684 match item.container {
1685 AssocItemContainer::Trait => {
1686 if let ty::AssocKind::Type = item.kind {
1687 self.encode_explicit_item_bounds(def_id);
1688 self.encode_explicit_item_self_bounds(def_id);
1689 if tcx.is_conditionally_const(def_id) {
1690 record_defaulted_array!(self.tables.explicit_implied_const_bounds[def_id]
1691 <- self.tcx.explicit_implied_const_bounds(def_id).skip_binder());
1692 }
1693 }
1694 }
1695 AssocItemContainer::Impl => {
1696 if let Some(trait_item_def_id) = item.trait_item_def_id {
1697 self.tables.trait_item_def_id.set_some(def_id.index, trait_item_def_id.into());
1698 }
1699 }
1700 }
1701 if let Some(rpitit_info) = item.opt_rpitit_info {
1702 record!(self.tables.opt_rpitit_info[def_id] <- rpitit_info);
1703 if matches!(rpitit_info, ty::ImplTraitInTraitData::Trait { .. }) {
1704 record_array!(
1705 self.tables.assumed_wf_types_for_rpitit[def_id]
1706 <- self.tcx.assumed_wf_types_for_rpitit(def_id)
1707 );
1708 self.encode_precise_capturing_args(def_id);
1709 }
1710 }
1711 }
1712
1713 fn encode_precise_capturing_args(&mut self, def_id: DefId) {
1714 let Some(precise_capturing_args) = self.tcx.rendered_precise_capturing_args(def_id) else {
1715 return;
1716 };
1717
1718 record_array!(self.tables.rendered_precise_capturing_args[def_id] <- precise_capturing_args);
1719 }
1720
1721 fn encode_mir(&mut self) {
1722 if self.is_proc_macro {
1723 return;
1724 }
1725
1726 let tcx = self.tcx;
1727 let reachable_set = tcx.reachable_set(());
1728
1729 let keys_and_jobs = tcx.mir_keys(()).iter().filter_map(|&def_id| {
1730 let (encode_const, encode_opt) = should_encode_mir(tcx, reachable_set, def_id);
1731 if encode_const || encode_opt { Some((def_id, encode_const, encode_opt)) } else { None }
1732 });
1733 for (def_id, encode_const, encode_opt) in keys_and_jobs {
1734 debug_assert!(encode_const || encode_opt);
1735
1736 debug!("EntryBuilder::encode_mir({:?})", def_id);
1737 if encode_opt {
1738 record!(self.tables.optimized_mir[def_id.to_def_id()] <- tcx.optimized_mir(def_id));
1739 self.tables
1740 .cross_crate_inlinable
1741 .set(def_id.to_def_id().index, self.tcx.cross_crate_inlinable(def_id));
1742 record!(self.tables.closure_saved_names_of_captured_variables[def_id.to_def_id()]
1743 <- tcx.closure_saved_names_of_captured_variables(def_id));
1744
1745 if self.tcx.is_coroutine(def_id.to_def_id())
1746 && let Some(witnesses) = tcx.mir_coroutine_witnesses(def_id)
1747 {
1748 record!(self.tables.mir_coroutine_witnesses[def_id.to_def_id()] <- witnesses);
1749 }
1750 }
1751 if encode_const {
1752 record!(self.tables.mir_for_ctfe[def_id.to_def_id()] <- tcx.mir_for_ctfe(def_id));
1753
1754 let abstract_const = tcx.thir_abstract_const(def_id);
1756 if let Ok(Some(abstract_const)) = abstract_const {
1757 record!(self.tables.thir_abstract_const[def_id.to_def_id()] <- abstract_const);
1758 }
1759
1760 if should_encode_const(tcx.def_kind(def_id)) {
1761 let qualifs = tcx.mir_const_qualif(def_id);
1762 record!(self.tables.mir_const_qualif[def_id.to_def_id()] <- qualifs);
1763 let body = tcx.hir_maybe_body_owned_by(def_id);
1764 if let Some(body) = body {
1765 let const_data = rendered_const(self.tcx, &body, def_id);
1766 record!(self.tables.rendered_const[def_id.to_def_id()] <- const_data);
1767 }
1768 }
1769 }
1770 record!(self.tables.promoted_mir[def_id.to_def_id()] <- tcx.promoted_mir(def_id));
1771
1772 if self.tcx.is_coroutine(def_id.to_def_id())
1773 && let Some(witnesses) = tcx.mir_coroutine_witnesses(def_id)
1774 {
1775 record!(self.tables.mir_coroutine_witnesses[def_id.to_def_id()] <- witnesses);
1776 }
1777 }
1778
1779 if tcx.sess.opts.output_types.should_codegen()
1783 && tcx.sess.opts.optimize != OptLevel::No
1784 && tcx.sess.opts.incremental.is_none()
1785 {
1786 for &local_def_id in tcx.mir_keys(()) {
1787 if let DefKind::AssocFn | DefKind::Fn = tcx.def_kind(local_def_id) {
1788 record_array!(self.tables.deduced_param_attrs[local_def_id.to_def_id()] <-
1789 self.tcx.deduced_param_attrs(local_def_id.to_def_id()));
1790 }
1791 }
1792 }
1793 }
1794
1795 #[instrument(level = "debug", skip(self))]
1796 fn encode_stability(&mut self, def_id: DefId) {
1797 if self.feat.staged_api() || self.tcx.sess.opts.unstable_opts.force_unstable_if_unmarked {
1800 if let Some(stab) = self.tcx.lookup_stability(def_id) {
1801 record!(self.tables.lookup_stability[def_id] <- stab)
1802 }
1803 }
1804 }
1805
1806 #[instrument(level = "debug", skip(self))]
1807 fn encode_const_stability(&mut self, def_id: DefId) {
1808 if self.feat.staged_api() || self.tcx.sess.opts.unstable_opts.force_unstable_if_unmarked {
1811 if let Some(stab) = self.tcx.lookup_const_stability(def_id) {
1812 record!(self.tables.lookup_const_stability[def_id] <- stab)
1813 }
1814 }
1815 }
1816
1817 #[instrument(level = "debug", skip(self))]
1818 fn encode_default_body_stability(&mut self, def_id: DefId) {
1819 if self.feat.staged_api() || self.tcx.sess.opts.unstable_opts.force_unstable_if_unmarked {
1822 if let Some(stab) = self.tcx.lookup_default_body_stability(def_id) {
1823 record!(self.tables.lookup_default_body_stability[def_id] <- stab)
1824 }
1825 }
1826 }
1827
1828 #[instrument(level = "debug", skip(self))]
1829 fn encode_deprecation(&mut self, def_id: DefId) {
1830 if let Some(depr) = self.tcx.lookup_deprecation(def_id) {
1831 record!(self.tables.lookup_deprecation_entry[def_id] <- depr);
1832 }
1833 }
1834
1835 #[instrument(level = "debug", skip(self))]
1836 fn encode_info_for_macro(&mut self, def_id: LocalDefId) {
1837 let tcx = self.tcx;
1838
1839 let hir::ItemKind::Macro(macro_def, _) = tcx.hir_expect_item(def_id).kind else { bug!() };
1840 self.tables.is_macro_rules.set(def_id.local_def_index, macro_def.macro_rules);
1841 record!(self.tables.macro_definition[def_id.to_def_id()] <- &*macro_def.body);
1842 }
1843
1844 fn encode_native_libraries(&mut self) -> LazyArray<NativeLib> {
1845 empty_proc_macro!(self);
1846 let used_libraries = self.tcx.native_libraries(LOCAL_CRATE);
1847 self.lazy_array(used_libraries.iter())
1848 }
1849
1850 fn encode_foreign_modules(&mut self) -> LazyArray<ForeignModule> {
1851 empty_proc_macro!(self);
1852 let foreign_modules = self.tcx.foreign_modules(LOCAL_CRATE);
1853 self.lazy_array(foreign_modules.iter().map(|(_, m)| m).cloned())
1854 }
1855
1856 fn encode_hygiene(&mut self) -> (SyntaxContextTable, ExpnDataTable, ExpnHashTable) {
1857 let mut syntax_contexts: TableBuilder<_, _> = Default::default();
1858 let mut expn_data_table: TableBuilder<_, _> = Default::default();
1859 let mut expn_hash_table: TableBuilder<_, _> = Default::default();
1860
1861 self.hygiene_ctxt.encode(
1862 &mut (&mut *self, &mut syntax_contexts, &mut expn_data_table, &mut expn_hash_table),
1863 |(this, syntax_contexts, _, _), index, ctxt_data| {
1864 syntax_contexts.set_some(index, this.lazy(ctxt_data));
1865 },
1866 |(this, _, expn_data_table, expn_hash_table), index, expn_data, hash| {
1867 if let Some(index) = index.as_local() {
1868 expn_data_table.set_some(index.as_raw(), this.lazy(expn_data));
1869 expn_hash_table.set_some(index.as_raw(), this.lazy(hash));
1870 }
1871 },
1872 );
1873
1874 (
1875 syntax_contexts.encode(&mut self.opaque),
1876 expn_data_table.encode(&mut self.opaque),
1877 expn_hash_table.encode(&mut self.opaque),
1878 )
1879 }
1880
1881 fn encode_proc_macros(&mut self) -> Option<ProcMacroData> {
1882 let is_proc_macro = self.tcx.crate_types().contains(&CrateType::ProcMacro);
1883 if is_proc_macro {
1884 let tcx = self.tcx;
1885 let hir = tcx.hir();
1886
1887 let proc_macro_decls_static = tcx.proc_macro_decls_static(()).unwrap().local_def_index;
1888 let stability = tcx.lookup_stability(CRATE_DEF_ID);
1889 let macros =
1890 self.lazy_array(tcx.resolutions(()).proc_macros.iter().map(|p| p.local_def_index));
1891 for (i, span) in self.tcx.sess.psess.proc_macro_quoted_spans() {
1892 let span = self.lazy(span);
1893 self.tables.proc_macro_quoted_spans.set_some(i, span);
1894 }
1895
1896 self.tables.def_kind.set_some(LOCAL_CRATE.as_def_id().index, DefKind::Mod);
1897 record!(self.tables.def_span[LOCAL_CRATE.as_def_id()] <- tcx.def_span(LOCAL_CRATE.as_def_id()));
1898 self.encode_attrs(LOCAL_CRATE.as_def_id().expect_local());
1899 let vis = tcx.local_visibility(CRATE_DEF_ID).map_id(|def_id| def_id.local_def_index);
1900 record!(self.tables.visibility[LOCAL_CRATE.as_def_id()] <- vis);
1901 if let Some(stability) = stability {
1902 record!(self.tables.lookup_stability[LOCAL_CRATE.as_def_id()] <- stability);
1903 }
1904 self.encode_deprecation(LOCAL_CRATE.as_def_id());
1905 if let Some(res_map) = tcx.resolutions(()).doc_link_resolutions.get(&CRATE_DEF_ID) {
1906 record!(self.tables.doc_link_resolutions[LOCAL_CRATE.as_def_id()] <- res_map);
1907 }
1908 if let Some(traits) = tcx.resolutions(()).doc_link_traits_in_scope.get(&CRATE_DEF_ID) {
1909 record_array!(self.tables.doc_link_traits_in_scope[LOCAL_CRATE.as_def_id()] <- traits);
1910 }
1911
1912 for &proc_macro in &tcx.resolutions(()).proc_macros {
1916 let id = proc_macro;
1917 let proc_macro = tcx.local_def_id_to_hir_id(proc_macro);
1918 let mut name = tcx.hir_name(proc_macro);
1919 let span = hir.span(proc_macro);
1920 let attrs = tcx.hir_attrs(proc_macro);
1923 let macro_kind = if ast::attr::contains_name(attrs, sym::proc_macro) {
1924 MacroKind::Bang
1925 } else if ast::attr::contains_name(attrs, sym::proc_macro_attribute) {
1926 MacroKind::Attr
1927 } else if let Some(attr) = ast::attr::find_by_name(attrs, sym::proc_macro_derive) {
1928 name = attr.meta_item_list().unwrap()[0]
1930 .meta_item()
1931 .unwrap()
1932 .ident()
1933 .unwrap()
1934 .name;
1935 MacroKind::Derive
1936 } else {
1937 bug!("Unknown proc-macro type for item {:?}", id);
1938 };
1939
1940 let mut def_key = self.tcx.hir_def_key(id);
1941 def_key.disambiguated_data.data = DefPathData::MacroNs(name);
1942
1943 let def_id = id.to_def_id();
1944 self.tables.def_kind.set_some(def_id.index, DefKind::Macro(macro_kind));
1945 self.tables.proc_macro.set_some(def_id.index, macro_kind);
1946 self.encode_attrs(id);
1947 record!(self.tables.def_keys[def_id] <- def_key);
1948 record!(self.tables.def_ident_span[def_id] <- span);
1949 record!(self.tables.def_span[def_id] <- span);
1950 record!(self.tables.visibility[def_id] <- ty::Visibility::Public);
1951 if let Some(stability) = stability {
1952 record!(self.tables.lookup_stability[def_id] <- stability);
1953 }
1954 }
1955
1956 Some(ProcMacroData { proc_macro_decls_static, stability, macros })
1957 } else {
1958 None
1959 }
1960 }
1961
1962 fn encode_debugger_visualizers(&mut self) -> LazyArray<DebuggerVisualizerFile> {
1963 empty_proc_macro!(self);
1964 self.lazy_array(
1965 self.tcx
1966 .debugger_visualizers(LOCAL_CRATE)
1967 .iter()
1968 .map(DebuggerVisualizerFile::path_erased),
1973 )
1974 }
1975
1976 fn encode_crate_deps(&mut self) -> LazyArray<CrateDep> {
1977 empty_proc_macro!(self);
1978
1979 let deps = self
1980 .tcx
1981 .crates(())
1982 .iter()
1983 .map(|&cnum| {
1984 let dep = CrateDep {
1985 name: self.tcx.crate_name(cnum),
1986 hash: self.tcx.crate_hash(cnum),
1987 host_hash: self.tcx.crate_host_hash(cnum),
1988 kind: self.tcx.dep_kind(cnum),
1989 extra_filename: self.tcx.extra_filename(cnum).clone(),
1990 is_private: self.tcx.is_private_dep(cnum),
1991 };
1992 (cnum, dep)
1993 })
1994 .collect::<Vec<_>>();
1995
1996 {
1997 let mut expected_cnum = 1;
1999 for &(n, _) in &deps {
2000 assert_eq!(n, CrateNum::new(expected_cnum));
2001 expected_cnum += 1;
2002 }
2003 }
2004
2005 self.lazy_array(deps.iter().map(|(_, dep)| dep))
2010 }
2011
2012 fn encode_target_modifiers(&mut self) -> LazyArray<TargetModifier> {
2013 empty_proc_macro!(self);
2014 let tcx = self.tcx;
2015 self.lazy_array(tcx.sess.opts.gather_target_modifiers())
2016 }
2017
2018 fn encode_lib_features(&mut self) -> LazyArray<(Symbol, FeatureStability)> {
2019 empty_proc_macro!(self);
2020 let tcx = self.tcx;
2021 let lib_features = tcx.lib_features(LOCAL_CRATE);
2022 self.lazy_array(lib_features.to_sorted_vec())
2023 }
2024
2025 fn encode_stability_implications(&mut self) -> LazyArray<(Symbol, Symbol)> {
2026 empty_proc_macro!(self);
2027 let tcx = self.tcx;
2028 let implications = tcx.stability_implications(LOCAL_CRATE);
2029 let sorted = implications.to_sorted_stable_ord();
2030 self.lazy_array(sorted.into_iter().map(|(k, v)| (*k, *v)))
2031 }
2032
2033 fn encode_diagnostic_items(&mut self) -> LazyArray<(Symbol, DefIndex)> {
2034 empty_proc_macro!(self);
2035 let tcx = self.tcx;
2036 let diagnostic_items = &tcx.diagnostic_items(LOCAL_CRATE).name_to_id;
2037 self.lazy_array(diagnostic_items.iter().map(|(&name, def_id)| (name, def_id.index)))
2038 }
2039
2040 fn encode_lang_items(&mut self) -> LazyArray<(DefIndex, LangItem)> {
2041 empty_proc_macro!(self);
2042 let lang_items = self.tcx.lang_items().iter();
2043 self.lazy_array(lang_items.filter_map(|(lang_item, def_id)| {
2044 def_id.as_local().map(|id| (id.local_def_index, lang_item))
2045 }))
2046 }
2047
2048 fn encode_lang_items_missing(&mut self) -> LazyArray<LangItem> {
2049 empty_proc_macro!(self);
2050 let tcx = self.tcx;
2051 self.lazy_array(&tcx.lang_items().missing)
2052 }
2053
2054 fn encode_stripped_cfg_items(&mut self) -> LazyArray<StrippedCfgItem<DefIndex>> {
2055 self.lazy_array(
2056 self.tcx
2057 .stripped_cfg_items(LOCAL_CRATE)
2058 .into_iter()
2059 .map(|item| item.clone().map_mod_id(|def_id| def_id.index)),
2060 )
2061 }
2062
2063 fn encode_traits(&mut self) -> LazyArray<DefIndex> {
2064 empty_proc_macro!(self);
2065 self.lazy_array(self.tcx.traits(LOCAL_CRATE).iter().map(|def_id| def_id.index))
2066 }
2067
2068 #[instrument(level = "debug", skip(self))]
2070 fn encode_impls(&mut self) -> LazyArray<TraitImpls> {
2071 empty_proc_macro!(self);
2072 let tcx = self.tcx;
2073 let mut trait_impls: FxIndexMap<DefId, Vec<(DefIndex, Option<SimplifiedType>)>> =
2074 FxIndexMap::default();
2075
2076 for id in tcx.hir_free_items() {
2077 let DefKind::Impl { of_trait } = tcx.def_kind(id.owner_id) else {
2078 continue;
2079 };
2080 let def_id = id.owner_id.to_def_id();
2081
2082 self.tables.defaultness.set_some(def_id.index, tcx.defaultness(def_id));
2083
2084 if of_trait && let Some(header) = tcx.impl_trait_header(def_id) {
2085 record!(self.tables.impl_trait_header[def_id] <- header);
2086
2087 let trait_ref = header.trait_ref.instantiate_identity();
2088 let simplified_self_ty = fast_reject::simplify_type(
2089 self.tcx,
2090 trait_ref.self_ty(),
2091 TreatParams::InstantiateWithInfer,
2092 );
2093 trait_impls
2094 .entry(trait_ref.def_id)
2095 .or_default()
2096 .push((id.owner_id.def_id.local_def_index, simplified_self_ty));
2097
2098 let trait_def = tcx.trait_def(trait_ref.def_id);
2099 if let Ok(mut an) = trait_def.ancestors(tcx, def_id) {
2100 if let Some(specialization_graph::Node::Impl(parent)) = an.nth(1) {
2101 self.tables.impl_parent.set_some(def_id.index, parent.into());
2102 }
2103 }
2104
2105 if tcx.is_lang_item(trait_ref.def_id, LangItem::CoerceUnsized) {
2108 let coerce_unsized_info = tcx.coerce_unsized_info(def_id).unwrap();
2109 record!(self.tables.coerce_unsized_info[def_id] <- coerce_unsized_info);
2110 }
2111 }
2112 }
2113
2114 let trait_impls: Vec<_> = trait_impls
2115 .into_iter()
2116 .map(|(trait_def_id, impls)| TraitImpls {
2117 trait_id: (trait_def_id.krate.as_u32(), trait_def_id.index),
2118 impls: self.lazy_array(&impls),
2119 })
2120 .collect();
2121
2122 self.lazy_array(&trait_impls)
2123 }
2124
2125 #[instrument(level = "debug", skip(self))]
2126 fn encode_incoherent_impls(&mut self) -> LazyArray<IncoherentImpls> {
2127 empty_proc_macro!(self);
2128 let tcx = self.tcx;
2129
2130 let all_impls: Vec<_> = tcx
2131 .crate_inherent_impls(())
2132 .0
2133 .incoherent_impls
2134 .iter()
2135 .map(|(&simp, impls)| IncoherentImpls {
2136 self_ty: simp,
2137 impls: self.lazy_array(impls.iter().map(|def_id| def_id.local_def_index)),
2138 })
2139 .collect();
2140
2141 self.lazy_array(&all_impls)
2142 }
2143
2144 fn encode_exported_symbols(
2151 &mut self,
2152 exported_symbols: &[(ExportedSymbol<'tcx>, SymbolExportInfo)],
2153 ) -> LazyArray<(ExportedSymbol<'static>, SymbolExportInfo)> {
2154 empty_proc_macro!(self);
2155 let metadata_symbol_name = SymbolName::new(self.tcx, &metadata_symbol_name(self.tcx));
2158
2159 self.lazy_array(
2160 exported_symbols
2161 .iter()
2162 .filter(|&(exported_symbol, _)| match *exported_symbol {
2163 ExportedSymbol::NoDefId(symbol_name) => symbol_name != metadata_symbol_name,
2164 _ => true,
2165 })
2166 .cloned(),
2167 )
2168 }
2169
2170 fn encode_dylib_dependency_formats(&mut self) -> LazyArray<Option<LinkagePreference>> {
2171 empty_proc_macro!(self);
2172 let formats = self.tcx.dependency_formats(());
2173 if let Some(arr) = formats.get(&CrateType::Dylib) {
2174 return self.lazy_array(arr.iter().skip(1 ).map(
2175 |slot| match *slot {
2176 Linkage::NotLinked | Linkage::IncludedFromDylib => None,
2177
2178 Linkage::Dynamic => Some(LinkagePreference::RequireDynamic),
2179 Linkage::Static => Some(LinkagePreference::RequireStatic),
2180 },
2181 ));
2182 }
2183 LazyArray::default()
2184 }
2185}
2186
2187fn prefetch_mir(tcx: TyCtxt<'_>) {
2190 if !tcx.sess.opts.output_types.should_codegen() {
2191 return;
2193 }
2194
2195 let reachable_set = tcx.reachable_set(());
2196 par_for_each_in(tcx.mir_keys(()), |&def_id| {
2197 let (encode_const, encode_opt) = should_encode_mir(tcx, reachable_set, def_id);
2198
2199 if encode_const {
2200 tcx.ensure_done().mir_for_ctfe(def_id);
2201 }
2202 if encode_opt {
2203 tcx.ensure_done().optimized_mir(def_id);
2204 }
2205 if encode_opt || encode_const {
2206 tcx.ensure_done().promoted_mir(def_id);
2207 }
2208 })
2209}
2210
2211pub struct EncodedMetadata {
2235 mmap: Option<Mmap>,
2237 _temp_dir: Option<MaybeTempDir>,
2240}
2241
2242impl EncodedMetadata {
2243 #[inline]
2244 pub fn from_path(path: PathBuf, temp_dir: Option<MaybeTempDir>) -> std::io::Result<Self> {
2245 let file = std::fs::File::open(&path)?;
2246 let file_metadata = file.metadata()?;
2247 if file_metadata.len() == 0 {
2248 return Ok(Self { mmap: None, _temp_dir: None });
2249 }
2250 let mmap = unsafe { Some(Mmap::map(file)?) };
2251 Ok(Self { mmap, _temp_dir: temp_dir })
2252 }
2253
2254 #[inline]
2255 pub fn raw_data(&self) -> &[u8] {
2256 self.mmap.as_deref().unwrap_or_default()
2257 }
2258}
2259
2260impl<S: Encoder> Encodable<S> for EncodedMetadata {
2261 fn encode(&self, s: &mut S) {
2262 let slice = self.raw_data();
2263 slice.encode(s)
2264 }
2265}
2266
2267impl<D: Decoder> Decodable<D> for EncodedMetadata {
2268 fn decode(d: &mut D) -> Self {
2269 let len = d.read_usize();
2270 let mmap = if len > 0 {
2271 let mut mmap = MmapMut::map_anon(len).unwrap();
2272 mmap.copy_from_slice(d.read_raw_bytes(len));
2273 Some(mmap.make_read_only().unwrap())
2274 } else {
2275 None
2276 };
2277
2278 Self { mmap, _temp_dir: None }
2279 }
2280}
2281
2282pub fn encode_metadata(tcx: TyCtxt<'_>, path: &Path) {
2283 let _prof_timer = tcx.prof.verbose_generic_activity("generate_crate_metadata");
2284
2285 tcx.dep_graph.assert_ignored();
2288
2289 if tcx.sess.threads() != 1 {
2290 join(|| prefetch_mir(tcx), || tcx.exported_symbols(LOCAL_CRATE));
2294 }
2295
2296 let mut encoder = opaque::FileEncoder::new(path)
2297 .unwrap_or_else(|err| tcx.dcx().emit_fatal(FailCreateFileEncoder { err }));
2298 encoder.emit_raw_bytes(METADATA_HEADER);
2299
2300 encoder.emit_raw_bytes(&0u64.to_le_bytes());
2302
2303 let source_map_files = tcx.sess.source_map().files();
2304 let source_file_cache = (Arc::clone(&source_map_files[0]), 0);
2305 let required_source_files = Some(FxIndexSet::default());
2306 drop(source_map_files);
2307
2308 let hygiene_ctxt = HygieneEncodeContext::default();
2309
2310 let mut ecx = EncodeContext {
2311 opaque: encoder,
2312 tcx,
2313 feat: tcx.features(),
2314 tables: Default::default(),
2315 lazy_state: LazyState::NoNode,
2316 span_shorthands: Default::default(),
2317 type_shorthands: Default::default(),
2318 predicate_shorthands: Default::default(),
2319 source_file_cache,
2320 interpret_allocs: Default::default(),
2321 required_source_files,
2322 is_proc_macro: tcx.crate_types().contains(&CrateType::ProcMacro),
2323 hygiene_ctxt: &hygiene_ctxt,
2324 symbol_table: Default::default(),
2325 };
2326
2327 rustc_version(tcx.sess.cfg_version).encode(&mut ecx);
2329
2330 let root = ecx.encode_crate_root();
2333
2334 if let Err((path, err)) = ecx.opaque.finish() {
2338 tcx.dcx().emit_fatal(FailWriteFile { path: &path, err });
2339 }
2340
2341 let file = ecx.opaque.file();
2342 if let Err(err) = encode_root_position(file, root.position.get()) {
2343 tcx.dcx().emit_fatal(FailWriteFile { path: ecx.opaque.path(), err });
2344 }
2345
2346 tcx.prof.artifact_size("crate_metadata", "crate_metadata", file.metadata().unwrap().len());
2348}
2349
2350fn encode_root_position(mut file: &File, pos: usize) -> Result<(), std::io::Error> {
2351 let pos_before_seek = file.stream_position().unwrap();
2353
2354 let header = METADATA_HEADER.len();
2356 file.seek(std::io::SeekFrom::Start(header as u64))?;
2357 file.write_all(&pos.to_le_bytes())?;
2358
2359 file.seek(std::io::SeekFrom::Start(pos_before_seek))?;
2361 Ok(())
2362}
2363
2364pub(crate) fn provide(providers: &mut Providers) {
2365 *providers = Providers {
2366 doc_link_resolutions: |tcx, def_id| {
2367 tcx.resolutions(())
2368 .doc_link_resolutions
2369 .get(&def_id)
2370 .unwrap_or_else(|| span_bug!(tcx.def_span(def_id), "no resolutions for a doc link"))
2371 },
2372 doc_link_traits_in_scope: |tcx, def_id| {
2373 tcx.resolutions(()).doc_link_traits_in_scope.get(&def_id).unwrap_or_else(|| {
2374 span_bug!(tcx.def_span(def_id), "no traits in scope for a doc link")
2375 })
2376 },
2377
2378 ..*providers
2379 }
2380}
2381
2382pub fn rendered_const<'tcx>(tcx: TyCtxt<'tcx>, body: &hir::Body<'_>, def_id: LocalDefId) -> String {
2410 let value = body.value;
2411
2412 #[derive(PartialEq, Eq)]
2413 enum Classification {
2414 Literal,
2415 Simple,
2416 Complex,
2417 }
2418
2419 use Classification::*;
2420
2421 fn classify(expr: &hir::Expr<'_>) -> Classification {
2422 match &expr.kind {
2423 hir::ExprKind::Unary(hir::UnOp::Neg, expr) => {
2424 if matches!(expr.kind, hir::ExprKind::Lit(_)) { Literal } else { Complex }
2425 }
2426 hir::ExprKind::Lit(_) => Literal,
2427 hir::ExprKind::Tup([]) => Simple,
2428 hir::ExprKind::Block(hir::Block { stmts: [], expr: Some(expr), .. }, _) => {
2429 if classify(expr) == Complex { Complex } else { Simple }
2430 }
2431 hir::ExprKind::Path(hir::QPath::Resolved(_, hir::Path { segments, .. })) => {
2436 if segments.iter().all(|segment| segment.args.is_none()) { Simple } else { Complex }
2437 }
2438 hir::ExprKind::Path(hir::QPath::TypeRelative(..)) => Simple,
2441 hir::ExprKind::Path(hir::QPath::LangItem(..)) => Simple,
2443 _ => Complex,
2444 }
2445 }
2446
2447 match classify(value) {
2448 Literal
2458 if !value.span.from_expansion()
2459 && let Ok(snippet) = tcx.sess.source_map().span_to_snippet(value.span) =>
2460 {
2461 snippet
2462 }
2463
2464 Literal | Simple => id_to_string(&tcx, body.id().hir_id),
2467
2468 Complex => {
2472 if tcx.def_kind(def_id) == DefKind::AnonConst {
2473 "{ _ }".to_owned()
2474 } else {
2475 "_".to_owned()
2476 }
2477 }
2478 }
2479}