Auto merge of #68944 - Zoxc:hir-map, r=<try>

[WIP] Use queries for the HIR map

r? @eddyb cc @michaelwoerister

Author: bors

src/librustc/arena.rs

@@ -159,6 +159,12 @@ macro_rules! arena_types {
             [] type_binding: rustc_hir::TypeBinding<$tcx>,
             [] variant: rustc_hir::Variant<$tcx>,
             [] where_predicate: rustc_hir::WherePredicate<$tcx>,
+
+            // HIR query types
+            [few] hir_map: rustc::hir::map::Map<$tcx>,
+            [few] hir_definitions: rustc::hir::map::definitions::Definitions,
+            [] hir_owner: rustc::hir::HirOwner<$tcx>,
+            [] hir_owner_items: rustc::hir::HirOwnerItems<$tcx>,
         ], $tcx);
     )
 }

src/librustc/dep_graph/dep_node.rs

@@ -35,7 +35,7 @@
 //! "infer" some properties for each kind of `DepNode`:
 //!
 //! * Whether a `DepNode` of a given kind has any parameters at all. Some
-//!   `DepNode`s, like `AllLocalTraitImpls`, represent global concepts with only one value.
+//!   `DepNode`s, like `?`, represent global concepts with only one value.
 //! * Whether it is possible, in principle, to reconstruct a query key from a
 //!   given `DepNode`. Many `DepKind`s only require a single `DefId` parameter,
 //!   in which case it is possible to map the node's fingerprint back to the
@@ -276,8 +276,8 @@ macro_rules! define_dep_nodes {
             /// Construct a DepNode from the given DepKind and DefPathHash. This
             /// method will assert that the given DepKind actually requires a
             /// single DefId/DefPathHash parameter.
-            pub fn from_def_path_hash(kind: DepKind,
-                                      def_path_hash: DefPathHash)
+            pub fn from_def_path_hash(def_path_hash: DefPathHash,
+                                      kind: DepKind)
                                       -> DepNode {
                 debug_assert!(kind.can_reconstruct_query_key() && kind.has_params());
                 DepNode {
@@ -333,7 +333,7 @@ macro_rules! define_dep_nodes {
                 }
 
                 if kind.has_params() {
-                    Ok(def_path_hash.to_dep_node(kind))
+                    Ok(DepNode::from_def_path_hash(def_path_hash, kind))
                 } else {
                     Ok(DepNode::new_no_params(kind))
                 }
@@ -390,28 +390,13 @@ impl fmt::Debug for DepNode {
     }
 }
 
-impl DefPathHash {
-    pub fn to_dep_node(self, kind: DepKind) -> DepNode {
-        DepNode::from_def_path_hash(kind, self)
-    }
-}
-
 rustc_dep_node_append!([define_dep_nodes!][ <'tcx>
     // We use this for most things when incr. comp. is turned off.
     [] Null,
 
-    // Represents the body of a function or method. The def-id is that of the
-    // function/method.
-    [eval_always] HirBody(DefId),
-
-    // Represents the HIR node with the given node-id
-    [eval_always] Hir(DefId),
-
     // Represents metadata from an extern crate.
     [eval_always] CrateMetadata(CrateNum),
 
-    [eval_always] AllLocalTraitImpls,
-
     [anon] TraitSelect,
 
     [] CompileCodegenUnit(Symbol),

src/librustc/dep_graph/graph.rs

@@ -677,7 +677,7 @@ impl DepGraph {
                         }
                     } else {
                         match dep_dep_node.kind {
-                            DepKind::Hir | DepKind::HirBody | DepKind::CrateMetadata => {
+                            DepKind::CrateMetadata => {
                                 if let Some(def_id) = dep_dep_node.extract_def_id(tcx) {
                                     if def_id_corresponds_to_hir_dep_node(tcx, def_id) {
                                         // The `DefPath` has corresponding node,