Revert "Move trait_map into hir::Crate"

This reverts commit 936b6bf.

src/librustc_ast_lowering/lib.rs

@@ -203,8 +203,6 @@ pub trait Resolver {
     fn lint_buffer(&mut self) -> &mut LintBuffer;
 
     fn next_node_id(&mut self) -> NodeId;
-
-    fn trait_map(&self) -> &NodeMap<Vec<hir::TraitCandidate>>;
 }
 
 type NtToTokenstream = fn(&Nonterminal, &ParseSess, Span) -> TokenStream;
@@ -557,13 +555,6 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         let proc_macros =
             c.proc_macros.iter().map(|id| self.node_id_to_hir_id[*id].unwrap()).collect();
 
-        let trait_map = self
-            .resolver
-            .trait_map()
-            .iter()
-            .map(|(&k, v)| (self.node_id_to_hir_id[k].unwrap(), v.clone()))
-            .collect();
-
         self.resolver.definitions().init_node_id_to_hir_id_mapping(self.node_id_to_hir_id);
 
         hir::Crate {
@@ -578,7 +569,6 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             trait_impls: self.trait_impls,
             modules: self.modules,
             proc_macros,
-            trait_map,
         }
     }
 

src/librustc_hir/hir.rs

@@ -639,8 +639,6 @@ pub struct Crate<'hir> {
     /// A list of proc macro HirIds, written out in the order in which
     /// they are declared in the static array generated by proc_macro_harness.
     pub proc_macros: Vec<HirId>,
-
-    pub trait_map: BTreeMap<HirId, Vec<TraitCandidate>>,
 }
 
 impl Crate<'hir> {
@@ -2653,7 +2651,7 @@ pub type CaptureModeMap = NodeMap<CaptureBy>;
 // The TraitCandidate's import_ids is empty if the trait is defined in the same module, and
 // has length > 0 if the trait is found through an chain of imports, starting with the
 // import/use statement in the scope where the trait is used.
-#[derive(RustcEncodable, RustcDecodable, Clone, Debug)]
+#[derive(Clone, Debug)]
 pub struct TraitCandidate {
     pub def_id: DefId,
     pub import_ids: SmallVec<[LocalDefId; 1]>,

src/librustc_middle/hir/map/collector.rs

@@ -117,7 +117,6 @@ impl<'a, 'hir> NodeCollector<'a, 'hir> {
                 body_ids: _,
                 modules: _,
                 proc_macros: _,
-                trait_map: _,
             } = *krate;
 
             hash_body(&mut hcx, root_mod_def_path_hash, item, &mut hir_body_nodes)

src/librustc_middle/ty/context.rs

@@ -1120,9 +1120,9 @@ impl<'tcx> TyCtxt<'tcx> {
         };
 
         let mut trait_map: FxHashMap<_, FxHashMap<_, _>> = FxHashMap::default();
-        for (hir_id, v) in krate.trait_map.iter() {
+        for (hir_id, v) in resolutions.trait_map.into_iter() {
             let map = trait_map.entry(hir_id.owner).or_default();
-            map.insert(hir_id.local_id, StableVec::new(v.to_vec()));
+            map.insert(hir_id.local_id, StableVec::new(v));
         }
 
         GlobalCtxt {

src/librustc_middle/ty/mod.rs

@@ -121,6 +121,7 @@ pub struct ResolverOutputs {
     pub definitions: rustc_hir::definitions::Definitions,
     pub cstore: Box<CrateStoreDyn>,
     pub extern_crate_map: FxHashMap<LocalDefId, CrateNum>,
+    pub trait_map: FxHashMap<hir::HirId, Vec<hir::TraitCandidate>>,
     pub maybe_unused_trait_imports: FxHashSet<LocalDefId>,
     pub maybe_unused_extern_crates: Vec<(LocalDefId, Span)>,
     pub export_map: ExportMap<LocalDefId>,

src/librustc_resolve/lib.rs

@@ -1109,10 +1109,6 @@ impl rustc_ast_lowering::Resolver for Resolver<'_> {
     fn next_node_id(&mut self) -> NodeId {
         self.next_node_id()
     }
-
-    fn trait_map(&self) -> &NodeMap<Vec<TraitCandidate>> {
-        &self.trait_map
-    }
 }
 
 impl<'a> Resolver<'a> {
@@ -1288,6 +1284,11 @@ impl<'a> Resolver<'a> {
         let definitions = self.definitions;
         let extern_crate_map = self.extern_crate_map;
         let export_map = self.export_map;
+        let trait_map = self
+            .trait_map
+            .into_iter()
+            .map(|(k, v)| (definitions.node_id_to_hir_id(k), v))
+            .collect();
         let maybe_unused_trait_imports = self.maybe_unused_trait_imports;
         let maybe_unused_extern_crates = self.maybe_unused_extern_crates;
         let glob_map = self.glob_map;
@@ -1296,6 +1297,7 @@ impl<'a> Resolver<'a> {
             cstore: Box::new(self.crate_loader.into_cstore()),
             extern_crate_map,
             export_map,
+            trait_map,
             glob_map,
             maybe_unused_trait_imports,
             maybe_unused_extern_crates,
@@ -1313,6 +1315,11 @@ impl<'a> Resolver<'a> {
             cstore: Box::new(self.cstore().clone()),
             extern_crate_map: self.extern_crate_map.clone(),
             export_map: self.export_map.clone(),
+            trait_map: self
+                .trait_map
+                .iter()
+                .map(|(&k, v)| (self.definitions.node_id_to_hir_id(k), v.clone()))
+                .collect(),
             glob_map: self.glob_map.clone(),
             maybe_unused_trait_imports: self.maybe_unused_trait_imports.clone(),
             maybe_unused_extern_crates: self.maybe_unused_extern_crates.clone(),