[builtins] implement Array.prototype.includes in TurboFan

src/objects.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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 1986 matching lines @@
   // ES6 [[OwnPropertyKeys]] (modulo return type)
   MUST_USE_RESULT static inline MaybeHandle<FixedArray> OwnPropertyKeys(
       Handle<JSReceiver> object);
 
   MUST_USE_RESULT static MaybeHandle<FixedArray> GetOwnValues(
       Handle<JSReceiver> object, PropertyFilter filter);
 
   MUST_USE_RESULT static MaybeHandle<FixedArray> GetOwnEntries(
       Handle<JSReceiver> object, PropertyFilter filter);
 
+  MUST_USE_RESULT static Maybe<bool> IncludesValue(Isolate* isolate,
+                                                   Handle<JSReceiver> object,
+                                                   Handle<Object> value,
+                                                   Handle<Object> start_from);
+
   // Layout description.
   static const int kPropertiesOffset = HeapObject::kHeaderSize;
   static const int kHeaderSize = HeapObject::kHeaderSize + kPointerSize;
 
   bool HasProxyInPrototype(Isolate* isolate);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSReceiver);
 };
 
@@ skipping 171 matching lines @@
   static void ReoptimizeIfPrototype(Handle<JSObject> object);
   static void MakePrototypesFast(Handle<Object> receiver,
                                  WhereToStart where_to_start, Isolate* isolate);
   static void LazyRegisterPrototypeUser(Handle<Map> user, Isolate* isolate);
   static void UpdatePrototypeUserRegistration(Handle<Map> old_map,
                                               Handle<Map> new_map,
                                               Isolate* isolate);
   static bool UnregisterPrototypeUser(Handle<Map> user, Isolate* isolate);
   static void InvalidatePrototypeChains(Map* map);
 
+  // Utility used by many Array builtins and runtime functions
+  static inline bool PrototypeHasNoElements(Isolate* isolate, JSObject* object);
+
   // Alternative implementation of WeakFixedArray::NullCallback.
   class PrototypeRegistryCompactionCallback {
    public:
     static void Callback(Object* value, int old_index, int new_index);
   };
 
   // Retrieve interceptors.
   inline InterceptorInfo* GetNamedInterceptor();
   inline InterceptorInfo* GetIndexedInterceptor();
 
@@ skipping 8803 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_