Only store the result of mir_borrowck for closures

src/librustc/ty/query/config.rs

@@ -51,7 +51,7 @@ pub(super) trait QueryDescription<'tcx>: QueryAccessors<'tcx> {
     fn describe(tcx: TyCtxt<'_, '_, '_>, key: Self::Key) -> Cow<'static, str>;
 
     #[inline]
-    fn cache_on_disk(_: Self::Key) -> bool {
+    fn cache_on_disk(_: TyCtxt<'_, 'tcx, 'tcx>, _: Self::Key) -> bool {
         false
     }
 
@@ -387,7 +387,7 @@ impl<'tcx> QueryDescription<'tcx> for queries::const_eval<'tcx> {
     }
 
     #[inline]
-    fn cache_on_disk(_key: Self::Key) -> bool {
+    fn cache_on_disk(_: TyCtxt<'_, 'tcx, 'tcx>, _key: Self::Key) -> bool {
         true
     }
 
@@ -407,7 +407,7 @@ impl<'tcx> QueryDescription<'tcx> for queries::const_eval_raw<'tcx> {
     }
 
     #[inline]
-    fn cache_on_disk(_key: Self::Key) -> bool {
+    fn cache_on_disk(_: TyCtxt<'_, 'tcx, 'tcx>, _key: Self::Key) -> bool {
         true
     }
 
@@ -431,7 +431,7 @@ impl<'tcx> QueryDescription<'tcx> for queries::symbol_name<'tcx> {
     }
 
     #[inline]
-    fn cache_on_disk(_: Self::Key) -> bool {
+    fn cache_on_disk(_: TyCtxt<'_, 'tcx, 'tcx>, _: Self::Key) -> bool {
         true
     }
 
@@ -505,7 +505,7 @@ impl<'tcx> QueryDescription<'tcx> for queries::const_is_rvalue_promotable_to_sta
     }
 
     #[inline]
-    fn cache_on_disk(_: Self::Key) -> bool {
+    fn cache_on_disk(_: TyCtxt<'_, 'tcx, 'tcx>, _: Self::Key) -> bool {
         true
     }
 
@@ -539,7 +539,7 @@ impl<'tcx> QueryDescription<'tcx> for queries::codegen_fulfill_obligation<'tcx>
     }
 
     #[inline]
-    fn cache_on_disk(_: Self::Key) -> bool {
+    fn cache_on_disk(_: TyCtxt<'_, 'tcx, 'tcx>, _: Self::Key) -> bool {
         true
     }
 
@@ -877,7 +877,7 @@ impl<'tcx> QueryDescription<'tcx> for queries::features_query<'tcx> {
 
 impl<'tcx> QueryDescription<'tcx> for queries::typeck_tables_of<'tcx> {
     #[inline]
-    fn cache_on_disk(def_id: Self::Key) -> bool {
+    fn cache_on_disk(_: TyCtxt<'_, 'tcx, 'tcx>, def_id: Self::Key) -> bool {
         def_id.is_local()
     }
 
@@ -894,7 +894,7 @@ impl<'tcx> QueryDescription<'tcx> for queries::typeck_tables_of<'tcx> {
 
 impl<'tcx> QueryDescription<'tcx> for queries::optimized_mir<'tcx> {
     #[inline]
-    fn cache_on_disk(def_id: Self::Key) -> bool {
+    fn cache_on_disk(_: TyCtxt<'_, 'tcx, 'tcx>, def_id: Self::Key) -> bool {
         def_id.is_local()
     }
 
@@ -933,7 +933,7 @@ impl<'tcx> QueryDescription<'tcx> for queries::instance_def_size_estimate<'tcx>
 
 impl<'tcx> QueryDescription<'tcx> for queries::generics_of<'tcx> {
     #[inline]
-    fn cache_on_disk(def_id: Self::Key) -> bool {
+    fn cache_on_disk(_: TyCtxt<'_, 'tcx, 'tcx>, def_id: Self::Key) -> bool {
         def_id.is_local()
     }
 
@@ -983,10 +983,10 @@ impl<'tcx> QueryDescription<'tcx> for queries::backend_optimization_level<'tcx>
 }
 
 macro_rules! impl_disk_cacheable_query(
-    ($query_name:ident, |$key:tt| $cond:expr) => {
+    ($query_name:ident, |$tcx:tt, $key:tt| $cond:expr) => {
         impl<'tcx> QueryDescription<'tcx> for queries::$query_name<'tcx> {
             #[inline]
-            fn cache_on_disk($key: Self::Key) -> bool {
+            fn cache_on_disk($tcx: TyCtxt<'_, 'tcx, 'tcx>, $key: Self::Key) -> bool {
                 $cond
             }
 
@@ -1000,14 +1000,17 @@ macro_rules! impl_disk_cacheable_query(
     }
 );
 
-impl_disk_cacheable_query!(unsafety_check_result, |def_id| def_id.is_local());
-impl_disk_cacheable_query!(borrowck, |def_id| def_id.is_local());
-impl_disk_cacheable_query!(mir_borrowck, |def_id| def_id.is_local());
-impl_disk_cacheable_query!(mir_const_qualif, |def_id| def_id.is_local());
-impl_disk_cacheable_query!(check_match, |def_id| def_id.is_local());
-impl_disk_cacheable_query!(def_symbol_name, |_| true);
-impl_disk_cacheable_query!(type_of, |def_id| def_id.is_local());
-impl_disk_cacheable_query!(predicates_of, |def_id| def_id.is_local());
-impl_disk_cacheable_query!(used_trait_imports, |def_id| def_id.is_local());
-impl_disk_cacheable_query!(codegen_fn_attrs, |_| true);
-impl_disk_cacheable_query!(specialization_graph_of, |_| true);
+impl_disk_cacheable_query!(mir_borrowck, |tcx, def_id| {
+    def_id.is_local() && tcx.is_closure(def_id)
+});
+
+impl_disk_cacheable_query!(unsafety_check_result, |_, def_id| def_id.is_local());
+impl_disk_cacheable_query!(borrowck, |_, def_id| def_id.is_local());
+impl_disk_cacheable_query!(mir_const_qualif, |_, def_id| def_id.is_local());
+impl_disk_cacheable_query!(check_match, |_, def_id| def_id.is_local());
+impl_disk_cacheable_query!(def_symbol_name, |_, _| true);
+impl_disk_cacheable_query!(type_of, |_, def_id| def_id.is_local());
+impl_disk_cacheable_query!(predicates_of, |_, def_id| def_id.is_local());
+impl_disk_cacheable_query!(used_trait_imports, |_, def_id| def_id.is_local());
+impl_disk_cacheable_query!(codegen_fn_attrs, |_, _| true);
+impl_disk_cacheable_query!(specialization_graph_of, |_, _| true);

src/librustc/ty/query/on_disk_cache.rs

@@ -230,7 +230,7 @@ impl<'sess> OnDiskCache<'sess> {
                 assert!(cache.active.is_empty());
                 for (key, entry) in cache.results.iter() {
                     use ty::query::config::QueryDescription;
-                    if const_eval::cache_on_disk(key.clone()) {
+                    if const_eval::cache_on_disk(tcx, key.clone()) {
                         if let Ok(ref value) = entry.value {
                             let dep_node = SerializedDepNodeIndex::new(entry.index.index());
 
@@ -1086,7 +1086,7 @@ fn encode_query_results<'enc, 'a, 'tcx, Q, E>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
     let map = Q::query_cache(tcx).borrow();
     assert!(map.active.is_empty());
     for (key, entry) in map.results.iter() {
-        if Q::cache_on_disk(key.clone()) {
+        if Q::cache_on_disk(tcx, key.clone()) {
             let dep_node = SerializedDepNodeIndex::new(entry.index.index());
 
             // Record position of the cache entry

src/librustc/ty/query/plumbing.rs

@@ -434,7 +434,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
         debug_assert!(self.dep_graph.is_green(dep_node));
 
         // First we try to load the result from the on-disk cache
-        let result = if Q::cache_on_disk(key.clone()) &&
+        let result = if Q::cache_on_disk(self.global_tcx(), key.clone()) &&
                         self.sess.opts.debugging_opts.incremental_queries {
             let result = Q::try_load_from_disk(self.global_tcx(), prev_dep_node_index);
 
@@ -1443,7 +1443,7 @@ macro_rules! impl_load_from_cache {
                 match self.kind {
                     $(DepKind::$dep_kind => {
                         let def_id = self.extract_def_id(tcx).unwrap();
-                        queries::$query_name::cache_on_disk(def_id)
+                        queries::$query_name::cache_on_disk(tcx.global_tcx(), def_id)
                     })*
                     _ => false
                 }

src/librustc_mir/transform/mod.rs

@@ -228,10 +228,10 @@ fn mir_validated<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> &'tcx
 fn optimized_mir<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> &'tcx Mir<'tcx> {
     // (Mir-)Borrowck uses `mir_validated`, so we have to force it to
     // execute before we can steal.
-    let _ = tcx.mir_borrowck(def_id);
+    tcx.ensure().mir_borrowck(def_id);
 
     if tcx.use_ast_borrowck() {
-        let _ = tcx.borrowck(def_id);
+        tcx.ensure().borrowck(def_id);
     }
 
     let mut mir = tcx.mir_validated(def_id).steal();