[turbofan] Improve deferred code handling for polymorphic property access.

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

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_
 #define V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/simplified-operator.h"
@@ skipping 50 matching lines @@
 
   enum PropertyAccessMode { kLoad, kStore };
   class PropertyAccessInfo;
   bool ComputePropertyAccessInfo(Handle<Map> map, Handle<Name> name,
                                  PropertyAccessMode access_mode,
                                  PropertyAccessInfo* access_info);
   bool ComputePropertyAccessInfos(MapHandleList const& maps, Handle<Name> name,
                                   PropertyAccessMode access_mode,
                                   ZoneVector<PropertyAccessInfo>* access_infos);
 
+  Reduction ReduceNamedAccess(Node* node, Node* value,
+                              MapHandleList const& receiver_maps,
+                              Handle<Name> name,
+                              PropertyAccessMode access_mode);
+
   struct ScriptContextTableLookupResult;
   bool LookupInScriptContextTable(Handle<Name> name,
                                   ScriptContextTableLookupResult* result);
 
   // Adds stability dependencies on all prototypes of every class in
   // {receiver_type} up to (and including) the {holder}.
   void AssumePrototypesStable(Type* receiver_type, Handle<JSObject> holder);
 
   Graph* graph() const;
   JSGraph* jsgraph() const { return jsgraph_; }
@@ skipping 19 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(JSNativeContextSpecialization);
 };
 
 DEFINE_OPERATORS_FOR_FLAGS(JSNativeContextSpecialization::Flags)
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_