Avoid redundant Option for cross_crate_inlinable

Author: Mark-Simulacrum

compiler/rustc_metadata/src/rmeta/decoder.rs

@@ -1266,7 +1266,7 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
     }
 
     fn cross_crate_inlinable(self, id: DefIndex) -> bool {
-        self.root.tables.cross_crate_inlinable.get(self, id).unwrap_or(false)
+        self.root.tables.cross_crate_inlinable.get(self, id)
     }
 
     fn get_fn_has_self_parameter(self, id: DefIndex, sess: &'a Session) -> bool {

compiler/rustc_metadata/src/rmeta/encoder.rs

@@ -1607,7 +1607,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
                 record!(self.tables.optimized_mir[def_id.to_def_id()] <- tcx.optimized_mir(def_id));
                 self.tables
                     .cross_crate_inlinable
-                    .set(def_id.to_def_id().index, Some(self.tcx.cross_crate_inlinable(def_id)));
+                    .set(def_id.to_def_id().index, self.tcx.cross_crate_inlinable(def_id));
                 record!(self.tables.closure_saved_names_of_captured_variables[def_id.to_def_id()]
                     <- tcx.closure_saved_names_of_captured_variables(def_id));
 

compiler/rustc_metadata/src/rmeta/mod.rs

@@ -398,6 +398,7 @@ define_tables! {
     // That's why the encoded list needs to contain `ModChild` structures describing all the names
     // individually instead of `DefId`s.
     module_children_reexports: Table<DefIndex, LazyArray<ModChild>>,
+    cross_crate_inlinable: Table<DefIndex, bool>,
 
 - optional:
     attributes: Table<DefIndex, LazyArray<ast::Attribute>>,
@@ -428,7 +429,6 @@ define_tables! {
     object_lifetime_default: Table<DefIndex, LazyValue<ObjectLifetimeDefault>>,
     optimized_mir: Table<DefIndex, LazyValue<mir::Body<'static>>>,
     mir_for_ctfe: Table<DefIndex, LazyValue<mir::Body<'static>>>,
-    cross_crate_inlinable: Table<DefIndex, bool>,
     closure_saved_names_of_captured_variables: Table<DefIndex, LazyValue<IndexVec<FieldIdx, Symbol>>>,
     mir_coroutine_witnesses: Table<DefIndex, LazyValue<mir::CoroutineLayout<'static>>>,
     promoted_mir: Table<DefIndex, LazyValue<IndexVec<mir::Promoted, mir::Body<'static>>>>,