Store adt_destructor in metadata

Author: oli-obk

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

@@ -330,10 +330,7 @@ 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 => {
-        let _ = cdata;
-        tcx.calculate_dtor(def_id, |_,_| Ok(()))
-    }
+    adt_destructor => { table }
     adt_async_destructor => {
         let _ = cdata;
         tcx.calculate_async_dtor(def_id, |_,_| Ok(()))

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

@@ -1633,6 +1633,10 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
                 record!(self.tables.fn_sig[variant.def_id] <- fn_sig);
             }
         }
+
+        if let Some(destructor) = tcx.adt_destructor(local_def_id) {
+            record!(self.tables.adt_destructor[def_id] <- destructor);
+        }
     }
 
     #[instrument(level = "debug", skip(self))]

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

@@ -446,6 +446,7 @@ define_tables! {
     fn_arg_names: Table<DefIndex, LazyArray<Option<Ident>>>,
     coroutine_kind: Table<DefIndex, hir::CoroutineKind>,
     coroutine_for_closure: Table<DefIndex, RawDefId>,
+    adt_destructor: Table<DefIndex, LazyValue<ty::Destructor>>,
     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

@@ -68,6 +68,7 @@ trivially_parameterized_over_tcx! {
     ty::AssocItemContainer,
     ty::Asyncness,
     ty::DeducedParamAttrs,
+    ty::Destructor,
     ty::Generics,
     ty::ImplPolarity,
     ty::ImplTraitInTraitData,