Move the untracked cstore and source_span into a struct

Cargo.lock

@@ -4342,6 +4342,7 @@ dependencies = [
  "rustc_feature",
  "rustc_fs_util",
  "rustc_hir",
+ "rustc_index",
  "rustc_lint_defs",
  "rustc_macros",
  "rustc_serialize",

compiler/rustc_interface/src/passes.rs

@@ -808,6 +808,7 @@ pub fn create_global_ctxt<'tcx>(
         definitions,
         global_ctxt: untracked_resolutions,
         ast_lowering: untracked_resolver_for_lowering,
+        untracked,
     } = resolver_outputs;
 
     let gcx = sess.time("setup_global_ctxt", || {
@@ -819,6 +820,7 @@ pub fn create_global_ctxt<'tcx>(
                 hir_arena,
                 definitions,
                 untracked_resolutions,
+                untracked,
                 krate,
                 dep_graph,
                 queries.on_disk_cache.as_ref().map(OnDiskCache::as_dyn),

compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -629,6 +629,9 @@ impl CrateStore for CStore {
     fn as_any(&self) -> &dyn Any {
         self
     }
+    fn untracked_as_any(&mut self) -> &mut dyn Any {
+        self
+    }
 
     fn crate_name(&self, cnum: CrateNum) -> Symbol {
         self.get_crate_data(cnum).root.name

compiler/rustc_middle/src/hir/map/mod.rs

@@ -14,7 +14,7 @@ use rustc_index::vec::Idx;
 use rustc_middle::hir::nested_filter;
 use rustc_span::def_id::StableCrateId;
 use rustc_span::symbol::{kw, sym, Ident, Symbol};
-use rustc_span::{Span, DUMMY_SP};
+use rustc_span::Span;
 use rustc_target::spec::abi::Abi;
 
 #[inline]
@@ -1162,7 +1162,7 @@ pub(super) fn crate_hash(tcx: TyCtxt<'_>, crate_num: CrateNum) -> Svh {
                 .filter_map(|(def_id, info)| {
                     let _ = info.as_owner()?;
                     let def_path_hash = definitions.def_path_hash(def_id);
-                    let span = resolutions.source_span.get(def_id).unwrap_or(&DUMMY_SP);
+                    let span = tcx.source_span(def_id);
                     debug_assert_eq!(span.parent(), None);
                     Some((def_path_hash, span))
                 })

compiler/rustc_middle/src/hir/mod.rs

@@ -141,8 +141,6 @@ pub fn provide(providers: &mut Providers) {
     providers.hir_attrs = |tcx, id| {
         tcx.hir_crate(()).owners[id.def_id].as_owner().map_or(AttributeMap::EMPTY, |o| &o.attrs)
     };
-    providers.source_span =
-        |tcx, def_id| tcx.resolutions(()).source_span.get(def_id).copied().unwrap_or(DUMMY_SP);
     providers.def_span = |tcx, def_id| {
         let def_id = def_id.expect_local();
         let hir_id = tcx.hir().local_def_id_to_hir_id(def_id);

compiler/rustc_middle/src/query/mod.rs

@@ -43,6 +43,8 @@ rustc_queries! {
     /// This span is meant for dep-tracking rather than diagnostics. It should not be used outside
     /// of rustc_middle::hir::source_map.
     query source_span(key: LocalDefId) -> Span {
+        // Accesses untracked data
+        eval_always
         desc { "getting the source span" }
     }
 

compiler/rustc_middle/src/ty/context.rs

@@ -59,7 +59,7 @@ use rustc_query_system::dep_graph::DepNodeIndex;
 use rustc_query_system::ich::StableHashingContext;
 use rustc_serialize::opaque::{FileEncodeResult, FileEncoder};
 use rustc_session::config::{CrateType, OutputFilenames};
-use rustc_session::cstore::CrateStoreDyn;
+use rustc_session::cstore::{CrateStoreDyn, Untracked};
 use rustc_session::lint::Lint;
 use rustc_session::Limit;
 use rustc_session::Session;
@@ -187,15 +187,13 @@ impl<'tcx> CtxtInterners<'tcx> {
         kind: TyKind<'tcx>,
         sess: &Session,
         definitions: &rustc_hir::definitions::Definitions,
-        cstore: &CrateStoreDyn,
+        untracked: &Untracked,
-        source_span: &IndexVec<LocalDefId, Span>,
     ) -> Ty<'tcx> {
         Ty(Interned::new_unchecked(
             self.type_
                 .intern(kind, |kind| {
                     let flags = super::flags::FlagComputation::for_kind(&kind);
-                    let stable_hash =
+                    let stable_hash = self.stable_hash(&flags, sess, definitions, untracked, &kind);
-                        self.stable_hash(&flags, sess, definitions, cstore, source_span, &kind);
 
                     InternedInSet(self.arena.alloc(WithCachedTypeInfo {
                         internee: kind,
@@ -213,8 +211,7 @@ impl<'tcx> CtxtInterners<'tcx> {
         flags: &ty::flags::FlagComputation,
         sess: &'a Session,
         definitions: &'a rustc_hir::definitions::Definitions,
-        cstore: &'a CrateStoreDyn,
+        untracked: &'a Untracked,
-        source_span: &'a IndexVec<LocalDefId, Span>,
         val: &T,
     ) -> Fingerprint {
         // It's impossible to hash inference variables (and will ICE), so we don't need to try to cache them.
@@ -223,7 +220,7 @@ impl<'tcx> CtxtInterners<'tcx> {
             Fingerprint::ZERO
         } else {
             let mut hasher = StableHasher::new();
-            let mut hcx = StableHashingContext::new(sess, definitions, cstore, source_span);
+            let mut hcx = StableHashingContext::new(sess, definitions, untracked);
             val.hash_stable(&mut hcx, &mut hasher);
             hasher.finish()
         }
@@ -235,16 +232,14 @@ impl<'tcx> CtxtInterners<'tcx> {
         kind: Binder<'tcx, PredicateKind<'tcx>>,
         sess: &Session,
         definitions: &rustc_hir::definitions::Definitions,
-        cstore: &CrateStoreDyn,
+        untracked: &Untracked,
-        source_span: &IndexVec<LocalDefId, Span>,
     ) -> Predicate<'tcx> {
         Predicate(Interned::new_unchecked(
             self.predicate
                 .intern(kind, |kind| {
                     let flags = super::flags::FlagComputation::for_predicate(kind);
 
-                    let stable_hash =
+                    let stable_hash = self.stable_hash(&flags, sess, definitions, untracked, &kind);
-                        self.stable_hash(&flags, sess, definitions, cstore, source_span, &kind);
 
                     InternedInSet(self.arena.alloc(WithCachedTypeInfo {
                         internee: kind,
@@ -963,10 +958,9 @@ impl<'tcx> CommonTypes<'tcx> {
         interners: &CtxtInterners<'tcx>,
         sess: &Session,
         definitions: &rustc_hir::definitions::Definitions,
-        cstore: &CrateStoreDyn,
+        untracked: &Untracked,
-        source_span: &IndexVec<LocalDefId, Span>,
     ) -> CommonTypes<'tcx> {
-        let mk = |ty| interners.intern_ty(ty, sess, definitions, cstore, source_span);
+        let mk = |ty| interners.intern_ty(ty, sess, definitions, untracked);
 
         CommonTypes {
             unit: mk(Tuple(List::empty())),
@@ -1114,6 +1108,7 @@ pub struct GlobalCtxt<'tcx> {
 
     definitions: RwLock<Definitions>,
 
+    untracked: Untracked,
     /// Output of the resolver.
     pub(crate) untracked_resolutions: ty::ResolverGlobalCtxt,
     /// The entire crate as AST. This field serves as the input for the hir_crate query,
@@ -1280,6 +1275,7 @@ impl<'tcx> TyCtxt<'tcx> {
         hir_arena: &'tcx WorkerLocal<hir::Arena<'tcx>>,
         definitions: Definitions,
         untracked_resolutions: ty::ResolverGlobalCtxt,
+        untracked: Untracked,
         krate: Lrc<ast::Crate>,
         dep_graph: DepGraph,
         on_disk_cache: Option<&'tcx dyn OnDiskCache<'tcx>>,
@@ -1292,14 +1288,7 @@ impl<'tcx> TyCtxt<'tcx> {
             s.emit_fatal(err);
         });
         let interners = CtxtInterners::new(arena);
-        let common_types = CommonTypes::new(
+        let common_types = CommonTypes::new(&interners, s, &definitions, &untracked);
-            &interners,
-            s,
-            &definitions,
-            &*untracked_resolutions.cstore,
-            // This is only used to create a stable hashing context.
-            &untracked_resolutions.source_span,
-        );
         let common_lifetimes = CommonLifetimes::new(&interners);
         let common_consts = CommonConsts::new(&interners, &common_types);
 
@@ -1315,6 +1304,7 @@ impl<'tcx> TyCtxt<'tcx> {
             types: common_types,
             lifetimes: common_lifetimes,
             consts: common_consts,
+            untracked,
             untracked_resolutions,
             untracked_crate: Steal::new(krate),
             on_disk_cache,
@@ -1428,7 +1418,7 @@ impl<'tcx> TyCtxt<'tcx> {
         if let Some(id) = id.as_local() {
             self.definitions_untracked().def_key(id)
         } else {
-            self.untracked_resolutions.cstore.def_key(id)
+            self.untracked.cstore.def_key(id)
         }
     }
 
@@ -1442,7 +1432,7 @@ impl<'tcx> TyCtxt<'tcx> {
         if let Some(id) = id.as_local() {
             self.definitions_untracked().def_path(id)
         } else {
-            self.untracked_resolutions.cstore.def_path(id)
+            self.untracked.cstore.def_path(id)
         }
     }
 
@@ -1452,7 +1442,7 @@ impl<'tcx> TyCtxt<'tcx> {
         if let Some(def_id) = def_id.as_local() {
             self.definitions_untracked().def_path_hash(def_id)
         } else {
-            self.untracked_resolutions.cstore.def_path_hash(def_id)
+            self.untracked.cstore.def_path_hash(def_id)
         }
     }
 
@@ -1461,7 +1451,7 @@ impl<'tcx> TyCtxt<'tcx> {
         if crate_num == LOCAL_CRATE {
             self.sess.local_stable_crate_id()
         } else {
-            self.untracked_resolutions.cstore.stable_crate_id(crate_num)
+            self.untracked.cstore.stable_crate_id(crate_num)
         }
     }
 
@@ -1472,7 +1462,7 @@ impl<'tcx> TyCtxt<'tcx> {
         if stable_crate_id == self.sess.local_stable_crate_id() {
             LOCAL_CRATE
         } else {
-            self.untracked_resolutions.cstore.stable_crate_id_to_crate_num(stable_crate_id)
+            self.untracked.cstore.stable_crate_id_to_crate_num(stable_crate_id)
         }
     }
 
@@ -1491,7 +1481,7 @@ impl<'tcx> TyCtxt<'tcx> {
         } else {
             // If this is a DefPathHash from an upstream crate, let the CrateStore map
             // it to a DefId.
-            let cstore = &*self.untracked_resolutions.cstore;
+            let cstore = &*self.untracked.cstore;
             let cnum = cstore.stable_crate_id_to_crate_num(stable_crate_id);
             cstore.def_path_hash_to_def_id(cnum, hash)
         }
@@ -1505,7 +1495,7 @@ impl<'tcx> TyCtxt<'tcx> {
         let (crate_name, stable_crate_id) = if def_id.is_local() {
             (self.crate_name, self.sess.local_stable_crate_id())
         } else {
-            let cstore = &*self.untracked_resolutions.cstore;
+            let cstore = &*self.untracked.cstore;
             (cstore.crate_name(def_id.krate), cstore.stable_crate_id(def_id.krate))
         };
 
@@ -1604,7 +1594,7 @@ impl<'tcx> TyCtxt<'tcx> {
     /// Note that this is *untracked* and should only be used within the query
     /// system if the result is otherwise tracked through queries
     pub fn cstore_untracked(self) -> &'tcx CrateStoreDyn {
-        &*self.untracked_resolutions.cstore
+        &*self.untracked.cstore
     }
 
     /// Note that this is *untracked* and should only be used within the query
@@ -1618,7 +1608,7 @@ impl<'tcx> TyCtxt<'tcx> {
     /// system if the result is otherwise tracked through queries
     #[inline]
     pub fn source_span_untracked(self, def_id: LocalDefId) -> Span {
-        self.untracked_resolutions.source_span.get(def_id).copied().unwrap_or(DUMMY_SP)
+        self.untracked.source_span.get(def_id).copied().unwrap_or(DUMMY_SP)
     }
 
     #[inline(always)]
@@ -1627,12 +1617,7 @@ impl<'tcx> TyCtxt<'tcx> {
         f: impl FnOnce(StableHashingContext<'_>) -> R,
     ) -> R {
         let definitions = self.definitions_untracked();
-        let hcx = StableHashingContext::new(
+        let hcx = StableHashingContext::new(self.sess, &*definitions, &self.untracked);
-            self.sess,
-            &*definitions,
-            &*self.untracked_resolutions.cstore,
-            &self.untracked_resolutions.source_span,
-        );
         f(hcx)
     }
 
@@ -2428,9 +2413,8 @@ impl<'tcx> TyCtxt<'tcx> {
             st,
             self.sess,
             &self.definitions.read(),
-            &*self.untracked_resolutions.cstore,
             // This is only used to create a stable hashing context.
-            &self.untracked_resolutions.source_span,
+            &self.untracked,
         )
     }
 
@@ -2440,9 +2424,8 @@ impl<'tcx> TyCtxt<'tcx> {
             binder,
             self.sess,
             &self.definitions.read(),
-            &*self.untracked_resolutions.cstore,
             // This is only used to create a stable hashing context.
-            &self.untracked_resolutions.source_span,
+            &self.untracked,
         )
     }
 
@@ -3124,4 +3107,6 @@ pub fn provide(providers: &mut ty::query::Providers) {
         // We want to check if the panic handler was defined in this crate
         tcx.lang_items().panic_impl().map_or(false, |did| did.is_local())
     };
+    providers.source_span =
+        |tcx, def_id| tcx.untracked.source_span.get(def_id).copied().unwrap_or(DUMMY_SP);
 }

compiler/rustc_middle/src/ty/mod.rs

@@ -46,7 +46,7 @@ use rustc_index::vec::IndexVec;
 use rustc_macros::HashStable;
 use rustc_query_system::ich::StableHashingContext;
 use rustc_serialize::{Decodable, Encodable};
-use rustc_session::cstore::CrateStoreDyn;
+use rustc_session::cstore::Untracked;
 use rustc_span::hygiene::MacroKind;
 use rustc_span::symbol::{kw, sym, Ident, Symbol};
 use rustc_span::{ExpnId, Span};
@@ -153,18 +153,16 @@ pub struct ResolverOutputs {
     pub definitions: Definitions,
     pub global_ctxt: ResolverGlobalCtxt,
     pub ast_lowering: ResolverAstLowering,
+    pub untracked: Untracked,
 }
 
 #[derive(Debug)]
 pub struct ResolverGlobalCtxt {
-    pub cstore: Box<CrateStoreDyn>,
     pub visibilities: FxHashMap<LocalDefId, Visibility>,
     /// This field is used to decide whether we should make `PRIVATE_IN_PUBLIC` a hard error.
     pub has_pub_restricted: bool,
     /// Item with a given `LocalDefId` was defined during macro expansion with ID `ExpnId`.
     pub expn_that_defined: FxHashMap<LocalDefId, ExpnId>,
-    /// Reference span for definitions.
-    pub source_span: IndexVec<LocalDefId, Span>,
     pub effective_visibilities: EffectiveVisibilities,
     pub extern_crate_map: FxHashMap<LocalDefId, CrateNum>,
     pub maybe_unused_trait_imports: FxIndexSet<LocalDefId>,

compiler/rustc_query_system/src/ich/hcx.rs

@@ -7,8 +7,7 @@ use rustc_data_structures::sync::Lrc;
 use rustc_hir as hir;
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_hir::definitions::{DefPathHash, Definitions};
-use rustc_index::vec::IndexVec;
+use rustc_session::cstore::Untracked;
-use rustc_session::cstore::CrateStore;
 use rustc_session::Session;
 use rustc_span::source_map::SourceMap;
 use rustc_span::symbol::Symbol;
@@ -21,8 +20,7 @@ use rustc_span::{BytePos, CachingSourceMapView, SourceFile, Span, SpanData, DUMM
 #[derive(Clone)]
 pub struct StableHashingContext<'a> {
     definitions: &'a Definitions,
-    cstore: &'a dyn CrateStore,
+    untracked: &'a Untracked,
-    source_span: &'a IndexVec<LocalDefId, Span>,
     // The value of `-Z incremental-ignore-spans`.
     // This field should only be used by `unstable_opts_incremental_ignore_span`
     incremental_ignore_spans: bool,
@@ -49,19 +47,13 @@ pub(super) enum BodyResolver<'tcx> {
 
 impl<'a> StableHashingContext<'a> {
     #[inline]
-    pub fn new(
+    pub fn new(sess: &'a Session, definitions: &'a Definitions, untracked: &'a Untracked) -> Self {
-        sess: &'a Session,
-        definitions: &'a Definitions,
-        cstore: &'a dyn CrateStore,
-        source_span: &'a IndexVec<LocalDefId, Span>,
-    ) -> Self {
         let hash_spans_initial = !sess.opts.unstable_opts.incremental_ignore_spans;
 
         StableHashingContext {
             body_resolver: BodyResolver::Forbidden,
             definitions,
-            cstore,
+            untracked,
-            source_span,
             incremental_ignore_spans: sess.opts.unstable_opts.incremental_ignore_spans,
             caching_source_map: None,
             raw_source_map: sess.source_map(),
@@ -100,7 +92,7 @@ impl<'a> StableHashingContext<'a> {
         if let Some(def_id) = def_id.as_local() {
             self.local_def_path_hash(def_id)
         } else {
-            self.cstore.def_path_hash(def_id)
+            self.untracked.cstore.def_path_hash(def_id)
         }
     }
 
@@ -156,7 +148,7 @@ impl<'a> rustc_span::HashStableContext for StableHashingContext<'a> {
 
     #[inline]
     fn def_span(&self, def_id: LocalDefId) -> Span {
-        *self.source_span.get(def_id).unwrap_or(&DUMMY_SP)
+        *self.untracked.source_span.get(def_id).unwrap_or(&DUMMY_SP)
     }
 
     #[inline]

compiler/rustc_resolve/src/diagnostics.rs

@@ -153,7 +153,7 @@ impl<'a> Resolver<'a> {
             if !candidates.is_empty() {
                 show_candidates(
                     &self.session,
-                    &self.source_span,
+                    &self.untracked.source_span,
                     &mut err,
                     span,
                     &candidates,
@@ -682,7 +682,7 @@ impl<'a> Resolver<'a> {
                     }
                     show_candidates(
                         &self.session,
-                        &self.source_span,
+                        &self.untracked.source_span,
                         &mut err,
                         Some(span),
                         &import_suggestions,
@@ -1335,7 +1335,7 @@ impl<'a> Resolver<'a> {
             self.lookup_import_candidates(ident, Namespace::MacroNS, parent_scope, is_expected);
         show_candidates(
             &self.session,
-            &self.source_span,
+            &self.untracked.source_span,
             err,
             None,
             &import_suggestions,

compiler/rustc_resolve/src/effective_visibilities.rs

@@ -107,7 +107,10 @@ impl<'r, 'a> EffectiveVisibilitiesVisitor<'r, 'a> {
                 r.effective_visibilities.update_eff_vis(
                     r.local_def_id(node_id),
                     eff_vis,
-                    ResolverTree(&r.definitions, &r.cstore),
+                    ResolverTree(
+                        &r.definitions,
+                        &r.untracked.cstore.as_any().downcast_ref().unwrap(),
+                    ),
                 )
             }
         }

compiler/rustc_resolve/src/imports.rs

@@ -541,7 +541,7 @@ impl<'a, 'b> ImportResolver<'a, 'b> {
             if let Some(candidate) = &err.candidate {
                 import_candidates(
                     self.r.session,
-                    &self.r.source_span,
+                    &self.r.untracked.source_span,
                     &mut diag,
                     Some(err.span),
                     &candidate,

compiler/rustc_resolve/src/lib.rs

@@ -46,7 +46,7 @@ use rustc_middle::span_bug;
 use rustc_middle::ty::{self, DefIdTree, MainDefinition, RegisteredTools};
 use rustc_middle::ty::{ResolverGlobalCtxt, ResolverOutputs};
 use rustc_query_system::ich::StableHashingContext;
-use rustc_session::cstore::{CrateStore, MetadataLoaderDyn};
+use rustc_session::cstore::{CrateStore, MetadataLoaderDyn, Untracked};
 use rustc_session::lint::LintBuffer;
 use rustc_session::Session;
 use rustc_span::hygiene::{ExpnId, LocalExpnId, MacroKind, SyntaxContext, Transparency};
@@ -869,8 +869,6 @@ pub struct Resolver<'a> {
     definitions: Definitions,
     /// Item with a given `LocalDefId` was defined during macro expansion with ID `ExpnId`.
     expn_that_defined: FxHashMap<LocalDefId, ExpnId>,
-    /// Reference span for definitions.
-    source_span: IndexVec<LocalDefId, Span>,
 
     graph_root: Module<'a>,
 
@@ -956,7 +954,7 @@ pub struct Resolver<'a> {
 
     local_crate_name: Symbol,
     metadata_loader: Box<MetadataLoaderDyn>,
-    cstore: CStore,
+    untracked: Untracked,
     used_extern_options: FxHashSet<Symbol>,
     macro_names: FxHashSet<Ident>,
     builtin_macros: FxHashMap<Symbol, BuiltinMacroState>,
@@ -1132,7 +1130,7 @@ impl DefIdTree for ResolverTree<'_> {
 impl<'a, 'b> DefIdTree for &'a Resolver<'b> {
     #[inline]
     fn opt_parent(self, id: DefId) -> Option<DefId> {
-        ResolverTree(&self.definitions, &self.cstore).opt_parent(id)
+        ResolverTree(&self.definitions, self.cstore()).opt_parent(id)
     }
 }
 
@@ -1171,7 +1169,7 @@ impl Resolver<'_> {
 
         // A relative span's parent must be an absolute span.
         debug_assert_eq!(span.data_untracked().parent, None);
-        let _id = self.source_span.push(span);
+        let _id = self.untracked.source_span.push(span);
         debug_assert_eq!(_id, def_id);
 
         // Some things for which we allocate `LocalDefId`s don't correspond to
@@ -1263,7 +1261,6 @@ impl<'a> Resolver<'a> {
 
             definitions,
             expn_that_defined: Default::default(),
-            source_span,
 
             // The outermost module has def ID 0; this is not reflected in the
             // AST.
@@ -1317,7 +1314,7 @@ impl<'a> Resolver<'a> {
             metadata_loader,
             local_crate_name: crate_name,
             used_extern_options: Default::default(),
-            cstore: CStore::new(session),
+            untracked: Untracked { cstore: Box::new(CStore::new(session)), source_span },
             macro_names: FxHashSet::default(),
             builtin_macros: Default::default(),
             builtin_macro_kinds: Default::default(),
@@ -1409,8 +1406,6 @@ impl<'a> Resolver<'a> {
     pub fn into_outputs(self) -> ResolverOutputs {
         let proc_macros = self.proc_macros.iter().map(|id| self.local_def_id(*id)).collect();
         let definitions = self.definitions;
-        let cstore = Box::new(self.cstore);
-        let source_span = self.source_span;
         let expn_that_defined = self.expn_that_defined;
         let visibilities = self.visibilities;
         let has_pub_restricted = self.has_pub_restricted;
@@ -1422,9 +1417,8 @@ impl<'a> Resolver<'a> {
         let main_def = self.main_def;
         let confused_type_with_std_module = self.confused_type_with_std_module;
         let effective_visibilities = self.effective_visibilities;
+        let untracked = self.untracked;
         let global_ctxt = ResolverGlobalCtxt {
-            cstore,
-            source_span,
             expn_that_defined,
             visibilities,
             has_pub_restricted,
@@ -1459,16 +1453,15 @@ impl<'a> Resolver<'a> {
             builtin_macro_kinds: self.builtin_macro_kinds,
             lifetime_elision_allowed: self.lifetime_elision_allowed,
         };
-        ResolverOutputs { definitions, global_ctxt, ast_lowering }
+        ResolverOutputs { definitions, global_ctxt, ast_lowering, untracked }
     }
 
     pub fn clone_outputs(&self) -> ResolverOutputs {
         let proc_macros = self.proc_macros.iter().map(|id| self.local_def_id(*id)).collect();
         let definitions = self.definitions.clone();
         let cstore = Box::new(self.cstore().clone());
+        let untracked = Untracked { cstore, source_span: self.untracked.source_span.clone() };
         let global_ctxt = ResolverGlobalCtxt {
-            cstore,
-            source_span: self.source_span.clone(),
             expn_that_defined: self.expn_that_defined.clone(),
             visibilities: self.visibilities.clone(),
             has_pub_restricted: self.has_pub_restricted,
@@ -1503,11 +1496,11 @@ impl<'a> Resolver<'a> {
             builtin_macro_kinds: self.builtin_macro_kinds.clone(),
             lifetime_elision_allowed: self.lifetime_elision_allowed.clone(),
         };
-        ResolverOutputs { definitions, global_ctxt, ast_lowering }
+        ResolverOutputs { definitions, global_ctxt, ast_lowering, untracked }
     }
 
     fn create_stable_hashing_context(&self) -> StableHashingContext<'_> {
-        StableHashingContext::new(self.session, &self.definitions, &self.cstore, &self.source_span)
+        StableHashingContext::new(self.session, &self.definitions, &self.untracked)
     }
 
     pub fn crate_loader(&mut self) -> CrateLoader<'_> {
@@ -1515,14 +1508,14 @@ impl<'a> Resolver<'a> {
             &self.session,
             &*self.metadata_loader,
             self.local_crate_name,
-            &mut self.cstore,
+            &mut *self.untracked.cstore.untracked_as_any().downcast_mut().unwrap(),
             &self.definitions,
             &mut self.used_extern_options,
         )
     }
 
     pub fn cstore(&self) -> &CStore {
-        &self.cstore
+        self.untracked.cstore.as_any().downcast_ref().unwrap()
     }
 
     fn dummy_ext(&self, macro_kind: MacroKind) -> Lrc<SyntaxExtension> {
@@ -1958,7 +1951,7 @@ impl<'a> Resolver<'a> {
     /// Retrieves the span of the given `DefId` if `DefId` is in the local crate.
     #[inline]
     pub fn opt_span(&self, def_id: DefId) -> Option<Span> {
-        def_id.as_local().map(|def_id| self.source_span[def_id])
+        def_id.as_local().map(|def_id| self.untracked.source_span[def_id])
     }
 
     /// Retrieves the name of the given `DefId`.

compiler/rustc_resolve/src/macros.rs

@@ -455,7 +455,7 @@ impl<'a> ResolverExpand for Resolver<'a> {
     }
 
     fn get_proc_macro_quoted_span(&self, krate: CrateNum, id: usize) -> Span {
-        self.cstore.get_proc_macro_quoted_span_untracked(krate, id, self.session)
+        self.cstore().get_proc_macro_quoted_span_untracked(krate, id, self.session)
     }
 
     fn declare_proc_macro(&mut self, id: NodeId) {

compiler/rustc_session/Cargo.toml

@@ -13,6 +13,7 @@ rustc_hir = { path = "../rustc_hir" }
 rustc_target = { path = "../rustc_target" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_data_structures = { path = "../rustc_data_structures" }
+rustc_index = { path = "../rustc_index" }
 rustc_span = { path = "../rustc_span" }
 rustc_fs_util = { path = "../rustc_fs_util" }
 rustc_ast = { path = "../rustc_ast" }

compiler/rustc_session/src/cstore.rs

@@ -7,8 +7,9 @@ use crate::utils::NativeLibKind;
 use crate::Session;
 use rustc_ast as ast;
 use rustc_data_structures::sync::{self, MetadataRef};
-use rustc_hir::def_id::{CrateNum, DefId, StableCrateId, LOCAL_CRATE};
+use rustc_hir::def_id::{CrateNum, DefId, LocalDefId, StableCrateId, LOCAL_CRATE};
 use rustc_hir::definitions::{DefKey, DefPath, DefPathHash};
+use rustc_index::vec::IndexVec;
 use rustc_span::hygiene::{ExpnHash, ExpnId};
 use rustc_span::symbol::Symbol;
 use rustc_span::Span;
@@ -217,6 +218,7 @@ pub type MetadataLoaderDyn = dyn MetadataLoader + Sync;
 /// during resolve)
 pub trait CrateStore: std::fmt::Debug {
     fn as_any(&self) -> &dyn Any;
+    fn untracked_as_any(&mut self) -> &mut dyn Any;
 
     // Foreign definitions.
     // This information is safe to access, since it's hashed as part of the DefPathHash, which incr.
@@ -249,3 +251,10 @@ pub trait CrateStore: std::fmt::Debug {
 }
 
 pub type CrateStoreDyn = dyn CrateStore + sync::Sync;
+
+#[derive(Debug)]
+pub struct Untracked {
+    pub cstore: Box<CrateStoreDyn>,
+    /// Reference span for definitions.
+    pub source_span: IndexVec<LocalDefId, Span>,
+}