[turbofan] Serialize for "prototype" access on functions

Bug: v8:7790
Change-Id: I44c722357434a32ae9400a0e44dbc522dafe873a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1547849
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60567}

src/compiler/js-heap-broker.cc

@@ -325,6 +325,7 @@ class JSFunctionData : public JSObjectData {
   }
 
   void Serialize(JSHeapBroker* broker);
+  bool serialized() const { return serialized_; }
 
   ContextData* context() const { return context_; }
   NativeContextData* native_context() const { return native_context_; }
@@ -2864,6 +2865,11 @@ void JSFunctionRef::Serialize() {
   data()->AsJSFunction()->Serialize(broker());
 }
 
+bool JSFunctionRef::serialized() const {
+  CHECK_NE(broker()->mode(), JSHeapBroker::kDisabled);
+  return data()->AsJSFunction()->serialized();
+}
+
 bool JSFunctionRef::IsSerializedForCompilation() const {
   return shared().IsSerializedForCompilation(feedback_vector());
 }

src/compiler/js-heap-broker.h

@@ -243,7 +243,7 @@ class V8_EXPORT_PRIVATE JSFunctionRef : public JSObjectRef {
   bool PrototypeRequiresRuntimeLookup() const;
 
   void Serialize();
-  bool IsSerializedForCompilation() const;
+  bool serialized() const;
 
   // The following are available only after calling Serialize().
   ObjectRef prototype() const;
@@ -253,6 +253,8 @@ class V8_EXPORT_PRIVATE JSFunctionRef : public JSObjectRef {
   SharedFunctionInfoRef shared() const;
   FeedbackVectorRef feedback_vector() const;
   int InitialMapInstanceSizeWithMinSlack() const;
+
+  bool IsSerializedForCompilation() const;
 };
 
 class JSRegExpRef : public JSObjectRef {

src/compiler/js-native-context-specialization.cc

@@ -1384,9 +1384,13 @@ Reduction JSNativeContextSpecialization::ReduceJSLoadNamed(Node* node) {
         name.equals(ObjectRef(broker(), factory()->prototype_string()))) {
       // Optimize "prototype" property of functions.
       JSFunctionRef function = object.AsJSFunction();
-      // TODO(neis): This is a temporary hack needed because the copy reducer
-      // runs only after this pass.
+      if (!FLAG_concurrent_inlining) {
         function.Serialize();
+      } else if (!function.serialized()) {
+        TRACE_BROKER(broker(), "ReduceJSLoadNamed: missing data for function "
+                                   << function.object().address() << "\n");
+        return NoChange();
+      }
       // TODO(neis): Remove the has_prototype_slot condition once the broker is
       // always enabled.
       if (!function.map().has_prototype_slot() || !function.has_prototype() ||

src/compiler/serializer-for-background-compilation.cc

@@ -856,7 +856,8 @@ void SerializerForBackgroundCompilation::VisitLdaKeyedProperty(
 }
 
 void SerializerForBackgroundCompilation::ProcessNamedPropertyAccess(
-    Hints const& receiver, NameRef const& name, FeedbackSlot slot) {
+    Hints const& receiver, NameRef const& name, FeedbackSlot slot,
+    AccessMode mode) {
   if (!slot.IsInvalid()) ProcessFeedbackForNamedPropertyAccess(slot, name);
 
   for (Handle<Map> map :
@@ -866,29 +867,42 @@ void SerializerForBackgroundCompilation::ProcessNamedPropertyAccess(
 
   JSGlobalProxyRef global_proxy =
       broker()->native_context().global_proxy_object();
-  for (Handle<Object> object : receiver.constants()) {
+
+  for (Handle<Object> hint : receiver.constants()) {
+    ObjectRef object(broker(), hint);
     // For JSNativeContextSpecialization::ReduceNamedAccessFromNexus.
-    if (object.equals(global_proxy.object())) {
+    if (object.equals(global_proxy)) {
       global_proxy.GetPropertyCell(name, true);
     }
+    // For JSNativeContextSpecialization::ReduceJSLoadNamed.
+    if (mode == AccessMode::kLoad && object.IsJSFunction() &&
+        name.equals(ObjectRef(
+            broker(), broker()->isolate()->factory()->prototype_string()))) {
+      object.AsJSFunction().Serialize();
+    }
   }
 
   environment()->accumulator_hints().Clear();
 }
 
-void SerializerForBackgroundCompilation::VisitLdaNamedProperty(
-    BytecodeArrayIterator* iterator) {
+void SerializerForBackgroundCompilation::ProcessNamedPropertyAccess(
+    BytecodeArrayIterator* iterator, AccessMode mode) {
   Hints const& receiver =
       environment()->register_hints(iterator->GetRegisterOperand(0));
   Handle<Name> name(Name::cast(iterator->GetConstantForIndexOperand(1)),
                     broker()->isolate());
   FeedbackSlot slot = iterator->GetSlotOperand(2);
-  ProcessNamedPropertyAccess(receiver, NameRef(broker(), name), slot);
+  ProcessNamedPropertyAccess(receiver, NameRef(broker(), name), slot, mode);
+}
+
+void SerializerForBackgroundCompilation::VisitLdaNamedProperty(
+    BytecodeArrayIterator* iterator) {
+  ProcessNamedPropertyAccess(iterator, AccessMode::kLoad);
 }
 
 void SerializerForBackgroundCompilation::VisitStaNamedProperty(
     BytecodeArrayIterator* iterator) {
-  VisitLdaNamedProperty(iterator);
+  ProcessNamedPropertyAccess(iterator, AccessMode::kStore);
 }
 
 void SerializerForBackgroundCompilation::VisitTestIn(

src/compiler/serializer-for-background-compilation.h

@@ -247,14 +247,14 @@ class SerializerForBackgroundCompilation {
   void ProcessCallVarArgs(interpreter::BytecodeArrayIterator* iterator,
                           ConvertReceiverMode receiver_mode,
                           bool with_spread = false);
+
   void ProcessJump(interpreter::BytecodeArrayIterator* iterator);
   void MergeAfterJump(interpreter::BytecodeArrayIterator* iterator);
-  void ProcessNamedPropertyAccess(Hints const& receiver, NameRef const& name,
-                                  FeedbackSlot slot);
 
-  Hints RunChildSerializer(CompilationSubject function,
-                           base::Optional<Hints> new_target,
-                           const HintsVector& arguments, bool with_spread);
+  void ProcessNamedPropertyAccess(interpreter::BytecodeArrayIterator* iterator,
+                                  AccessMode mode);
+  void ProcessNamedPropertyAccess(Hints const& receiver, NameRef const& name,
+                                  FeedbackSlot slot, AccessMode mode);
 
   GlobalAccessFeedback const* ProcessFeedbackForGlobalAccess(FeedbackSlot slot);
   void ProcessFeedbackForKeyedPropertyAccess(FeedbackSlot slot,
@@ -263,6 +263,10 @@ class SerializerForBackgroundCompilation {
                                              NameRef const& name);
   void ProcessMapForNamedPropertyAccess(MapRef const& map, NameRef const& name);
 
+  Hints RunChildSerializer(CompilationSubject function,
+                           base::Optional<Hints> new_target,
+                           const HintsVector& arguments, bool with_spread);
+
   JSHeapBroker* broker() const { return broker_; }
   Zone* zone() const { return zone_; }
   Environment* environment() const { return environment_; }