Add generator_kind table.

Author: cjgillot

compiler/rustc_metadata/src/rmeta/decoder.rs

@@ -1439,13 +1439,6 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
         }
     }
 
-    fn generator_kind(self, id: DefIndex) -> Option<hir::GeneratorKind> {
-        match self.kind(id) {
-            EntryKind::Generator(data) => Some(data),
-            _ => None,
-        }
-    }
-
     #[inline]
     fn def_key(self, index: DefIndex) -> DefKey {
         *self

compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -140,6 +140,7 @@ provide! { <'tcx> tcx, def_id, other, cdata,
     rendered_const => { table }
     asyncness => { table }
     fn_arg_names => { table }
+    generator_kind => { table }
 
     trait_def => { cdata.get_trait_def(def_id.index, tcx.sess) }
     adt_def => { cdata.get_adt_def(def_id.index, tcx) }
@@ -153,7 +154,6 @@ provide! { <'tcx> tcx, def_id, other, cdata,
     is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) }
     is_foreign_item => { cdata.is_foreign_item(def_id.index) }
     static_mutability => { cdata.static_mutability(def_id.index) }
-    generator_kind => { cdata.generator_kind(def_id.index) }
     item_attrs => { tcx.arena.alloc_from_iter(cdata.get_item_attrs(def_id.index, tcx.sess)) }
     trait_of_item => { cdata.get_trait_of_item(def_id.index) }
     is_mir_available => { cdata.is_item_mir_available(def_id.index) }

compiler/rustc_metadata/src/rmeta/encoder.rs

@@ -1569,7 +1569,8 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
         match ty.kind() {
             ty::Generator(..) => {
                 let data = self.tcx.generator_kind(def_id).unwrap();
-                record!(self.tables.kind[def_id.to_def_id()] <- EntryKind::Generator(data));
+                record!(self.tables.kind[def_id.to_def_id()] <- EntryKind::Generator);
+                record!(self.tables.generator_kind[def_id.to_def_id()] <- data);
             }
 
             ty::Closure(..) => {

compiler/rustc_metadata/src/rmeta/mod.rs

@@ -312,6 +312,7 @@ define_tables! {
     rendered_const: Table<DefIndex, Lazy!(String)>,
     asyncness: Table<DefIndex, Lazy!(hir::IsAsync)>,
     fn_arg_names: Table<DefIndex, Lazy!([Ident])>,
+    generator_kind: Table<DefIndex, Lazy!(hir::GeneratorKind)>,
 
     trait_item_def_id: Table<DefIndex, Lazy<DefId>>,
     inherent_impls: Table<DefIndex, Lazy<[DefIndex]>>,
@@ -352,7 +353,7 @@ enum EntryKind {
     MacroDef(Lazy<MacroDef>),
     ProcMacro(MacroKind),
     Closure,
-    Generator(hir::GeneratorKind),
+    Generator,
     Trait(Lazy<TraitData>),
     Impl,
     AssocFn(Lazy<AssocFnData>),