Rollup merge of rust-lang#48939 - wesleywiser:incr_query_wf_checking, r=michaelwoerister

Querify WF-checking so it can be cached

r? @michaelwoerister

Author: kennytm

src/librustc/dep_graph/dep_node.rs

@@ -579,6 +579,9 @@ define_dep_nodes!( <'tcx>
     [] GetPanicStrategy(CrateNum),
     [] IsNoBuiltins(CrateNum),
     [] ImplDefaultness(DefId),
+    [] CheckItemWellFormed(DefId),
+    [] CheckTraitItemWellFormed(DefId),
+    [] CheckImplItemWellFormed(DefId),
     [] ReachableNonGenerics(CrateNum),
     [] NativeLibraries(CrateNum),
     [] PluginRegistrarFn(CrateNum),

src/librustc/ty/maps/mod.rs

@@ -299,6 +299,10 @@ define_maps! { <'tcx>
 
     [] fn impl_defaultness: ImplDefaultness(DefId) -> hir::Defaultness,
 
+    [] fn check_item_well_formed: CheckItemWellFormed(DefId) -> (),
+    [] fn check_trait_item_well_formed: CheckTraitItemWellFormed(DefId) -> (),
+    [] fn check_impl_item_well_formed: CheckImplItemWellFormed(DefId) -> (),
+
     // The DefIds of all non-generic functions and statics in the given crate
     // that can be reached from outside the crate.
     //

src/librustc/ty/maps/plumbing.rs

@@ -871,6 +871,9 @@ pub fn force_from_dep_node<'a, 'gcx, 'lcx>(tcx: TyCtxt<'a, 'gcx, 'lcx>,
         DepKind::GetPanicStrategy => { force!(panic_strategy, krate!()); }
         DepKind::IsNoBuiltins => { force!(is_no_builtins, krate!()); }
         DepKind::ImplDefaultness => { force!(impl_defaultness, def_id!()); }
+        DepKind::CheckItemWellFormed => { force!(check_item_well_formed, def_id!()); }
+        DepKind::CheckTraitItemWellFormed => { force!(check_trait_item_well_formed, def_id!()); }
+        DepKind::CheckImplItemWellFormed => { force!(check_impl_item_well_formed, def_id!()); }
         DepKind::ReachableNonGenerics => { force!(reachable_non_generics, krate!()); }
         DepKind::NativeLibraries => { force!(native_libraries, krate!()); }
         DepKind::PluginRegistrarFn => { force!(plugin_registrar_fn, krate!()); }

src/librustc_typeck/check/mod.rs

@@ -718,13 +718,28 @@ fn typeck_item_bodies<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, crate_num: CrateNum
     })?)
 }
 
+fn check_item_well_formed<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) {
+    wfcheck::check_item_well_formed(tcx, def_id);
+}
+
+fn check_trait_item_well_formed<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) {
+    wfcheck::check_trait_item(tcx, def_id);
+}
+
+fn check_impl_item_well_formed<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) {
+    wfcheck::check_impl_item(tcx, def_id);
+}
+
 pub fn provide(providers: &mut Providers) {
     *providers = Providers {
         typeck_item_bodies,
         typeck_tables_of,
         has_typeck_tables,
         adt_destructor,
         used_trait_imports,
+        check_item_well_formed,
+        check_trait_item_well_formed,
+        check_impl_item_well_formed,
         ..*providers
     };
 }