Avoid hashing the hir_crate query

Author: oli-obk

compiler/rustc_hir/src/stable_hash_impls.rs

@@ -3,7 +3,7 @@ use rustc_span::def_id::DefPathHash;
 
 use crate::HashIgnoredAttrId;
 use crate::hir::{
-    AttributeMap, BodyId, Crate, ForeignItemId, ImplItemId, ItemId, OwnerNodes, TraitItemId,
+    AttributeMap, BodyId, ForeignItemId, ImplItemId, ItemId, OwnerNodes, TraitItemId,
 };
 use crate::hir_id::{HirId, ItemLocalId};
 
@@ -111,13 +111,6 @@ impl<'tcx, HirCtx: crate::HashStableContext> HashStable<HirCtx> for AttributeMap
     }
 }
 
-impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for Crate<'_> {
-    fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
-        let Crate { owners: _, opt_hir_hash } = self;
-        opt_hir_hash.unwrap().hash_stable(hcx, hasher)
-    }
-}
-
 impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for HashIgnoredAttrId {
     fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
         hcx.hash_attr_id(self, hasher)

compiler/rustc_middle/src/query/mod.rs

@@ -151,6 +151,7 @@ rustc_queries! {
     query hir_crate(key: ()) -> &'tcx Crate<'tcx> {
         arena_cache
         eval_always
+        no_hash
         desc { "getting the crate HIR" }
     }