[builtins] implement JSBuiltinReducer for ArrayIteratorNext()

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 7261 matching lines @@
 #define DECLARE_FUNCTION_ID(ignored1, ignore2, name)    \
   k##name,
   FUNCTIONS_WITH_ID_LIST(DECLARE_FUNCTION_ID)
       ATOMIC_FUNCTIONS_WITH_ID_LIST(DECLARE_FUNCTION_ID)
 #undef DECLARE_FUNCTION_ID
   // Fake id for a special case of Math.pow. Note, it continues the
   // list of math functions.
   kMathPowHalf,
   // These are manually assigned to special getters during bootstrapping.
   kArrayBufferByteLength,
+  kArrayEntries,
+  kArrayKeys,
+  kArrayValues,
+  kArrayIteratorNext,
   kDataViewBuffer,
   kDataViewByteLength,
   kDataViewByteOffset,
   kGlobalDecodeURI,
   kGlobalDecodeURIComponent,
   kGlobalEncodeURI,
   kGlobalEncodeURIComponent,
   kGlobalEscape,
   kGlobalUnescape,
   kGlobalIsFinite,
   kGlobalIsNaN,
   kTypedArrayByteLength,
   kTypedArrayByteOffset,
+  kTypedArrayEntries,
+  kTypedArrayKeys,
   kTypedArrayLength,
+  kTypedArrayValues,
   kSharedArrayBufferByteLength,
   kStringIterator,
   kStringIteratorNext,
 };
 
 
 // Result of searching in an optimized code map of a SharedFunctionInfo. Note
 // that both {code} and {literals} can be NULL to pass search result status.
 struct CodeAndLiterals {
   Code* code;            // Cached optimized code.
@@ skipping 3396 matching lines @@
   // [object]: the [[IteratedObject]] internal field.
   DECL_ACCESSORS(object, Object)
 
   // [index]: The [[ArrayIteratorNextIndex]] internal field.
   DECL_ACCESSORS(index, Object)
 
   // [map]: The Map of the [[IteratedObject]] field at the time the iterator is
   // allocated.
   DECL_ACCESSORS(object_map, Object)
 
+  // Return the ElementsKind that a JSArrayIterator's [[IteratedObject]] is
+  // expected to have, based on its instance type.
+  static ElementsKind ElementsKindForInstanceType(InstanceType instance_type);
+
   static const int kIteratedObjectOffset = JSObject::kHeaderSize;
   static const int kNextIndexOffset = kIteratedObjectOffset + kPointerSize;
   static const int kIteratedObjectMapOffset = kNextIndexOffset + kPointerSize;
   static const int kSize = kIteratedObjectMapOffset + kPointerSize;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSArrayIterator);
 };
 
 class JSStringIterator : public JSObject {
@@ skipping 1101 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_