Store adt_async_destructor in metadata

Author: oli-obk

Diff for: compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -331,10 +331,7 @@ provide! { tcx, def_id, other, cdata,
     visibility => { cdata.get_visibility(def_id.index) }
     adt_def => { cdata.get_adt_def(def_id.index, tcx) }
     adt_destructor => { table }
-    adt_async_destructor => {
-        let _ = cdata;
-        tcx.calculate_async_dtor(def_id, |_,_| Ok(()))
-    }
+    adt_async_destructor => { table }
     associated_item_def_ids => {
         tcx.arena.alloc_from_iter(cdata.get_associated_item_or_field_def_ids(def_id.index))
     }

Diff for: compiler/rustc_metadata/src/rmeta/encoder.rs

@@ -1637,6 +1637,10 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
         if let Some(destructor) = tcx.adt_destructor(local_def_id) {
             record!(self.tables.adt_destructor[def_id] <- destructor);
         }
+
+        if let Some(destructor) = tcx.adt_async_destructor(local_def_id) {
+            record!(self.tables.adt_async_destructor[def_id] <- destructor);
+        }
     }
 
     #[instrument(level = "debug", skip(self))]

Diff for: compiler/rustc_metadata/src/rmeta/mod.rs

@@ -447,6 +447,7 @@ define_tables! {
     coroutine_kind: Table<DefIndex, hir::CoroutineKind>,
     coroutine_for_closure: Table<DefIndex, RawDefId>,
     adt_destructor: Table<DefIndex, LazyValue<ty::Destructor>>,
+    adt_async_destructor: Table<DefIndex, LazyValue<ty::AsyncDestructor>>,
     coroutine_by_move_body_def_id: Table<DefIndex, RawDefId>,
     eval_static_initializer: Table<DefIndex, LazyValue<mir::interpret::ConstAllocation<'static>>>,
     trait_def: Table<DefIndex, LazyValue<ty::TraitDef>>,

Diff for: compiler/rustc_middle/src/ty/parameterized.rs

@@ -65,6 +65,7 @@ trivially_parameterized_over_tcx! {
     crate::middle::lib_features::FeatureStability,
     crate::middle::resolve_bound_vars::ObjectLifetimeDefault,
     crate::mir::ConstQualifs,
+    ty::AsyncDestructor,
     ty::AssocItemContainer,
     ty::Asyncness,
     ty::DeducedParamAttrs,