Add a hir_krate query

src/librustc/hir/mod.rs

@@ -41,5 +41,6 @@ impl<'tcx> TyCtxt<'tcx> {
 }
 
 pub fn provide(providers: &mut Providers<'_>) {
+    providers.hir_crate = |tcx, _| tcx.hir_map.forest.untracked_krate();
     map::provide(providers);
 }

src/librustc/query/mod.rs

@@ -43,6 +43,12 @@ rustc_queries! {
     }
 
     Other {
+        query hir_crate(key: CrateNum) -> &'tcx Crate<'tcx> {
+            eval_always
+            no_hash
+            desc { "get the crate HIR" }
+        }
+
         /// Records the type of every item.
         query type_of(key: DefId) -> Ty<'tcx> {
             cache_on_disk_if { key.is_local() }

src/librustc/ty/query/mod.rs

@@ -45,7 +45,7 @@ use rustc_data_structures::sync::Lrc;
 use rustc_hir as hir;
 use rustc_hir::def::DefKind;
 use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, DefIdSet, DefIndex};
-use rustc_hir::{HirIdSet, ItemLocalId, TraitCandidate};
+use rustc_hir::{Crate, HirIdSet, ItemLocalId, TraitCandidate};
 use rustc_index::vec::IndexVec;
 use rustc_target::spec::PanicStrategy;