[builtins] implement JSBuiltinReducer for ArrayIteratorNext()

src/code-stub-assembler.h

 // Copyright 2016 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_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
 #include "src/globals.h"
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
 class CallInterfaceDescriptor;
 class StatsCounter;
 class StubCache;
 
 enum class PrimitiveType { kBoolean, kNumber, kString, kSymbol };
 
-enum class IterationKind { kKeys, kValues, kEntries };
-
 #define HEAP_CONSTANT_LIST(V)                 \
   V(BooleanMap, BooleanMap)                   \
   V(CodeMap, CodeMap)                         \
   V(empty_string, EmptyString)                \
   V(EmptyFixedArray, EmptyFixedArray)         \
   V(FalseValue, False)                        \
   V(FixedArrayMap, FixedArrayMap)             \
   V(FixedCOWArrayMap, FixedCOWArrayMap)       \
   V(FixedDoubleArrayMap, FixedDoubleArrayMap) \
   V(HeapNumberMap, HeapNumberMap)             \
@@ skipping 592 matching lines @@
   compiler::Node* IsName(compiler::Node* object);
   compiler::Node* IsJSValue(compiler::Node* object);
   compiler::Node* IsJSArray(compiler::Node* object);
   compiler::Node* IsNativeContext(compiler::Node* object);
   compiler::Node* IsWeakCell(compiler::Node* object);
   compiler::Node* IsFixedDoubleArray(compiler::Node* object);
   compiler::Node* IsHashTable(compiler::Node* object);
   compiler::Node* IsDictionary(compiler::Node* object);
   compiler::Node* IsUnseededNumberDictionary(compiler::Node* object);
 
+  // ElementsKind helpers:
+  compiler::Node* IsFastElementsKind(compiler::Node* elements_kind);
+  compiler::Node* IsHoleyFastElementsKind(compiler::Node* elements_kind);
+
   // String helpers.
   // Load a character from a String (might flatten a ConsString).
   compiler::Node* StringCharCodeAt(compiler::Node* string,
                                    compiler::Node* smi_index);
   // Return the single character string with only {code}.
   compiler::Node* StringFromCharCode(compiler::Node* code);
   // Return a new string object which holds a substring containing the range
   // [from,to[ of string.  |from| and |to| are expected to be tagged.
   compiler::Node* SubString(compiler::Node* context, compiler::Node* string,
                             compiler::Node* from, compiler::Node* to);
@@ skipping 640 matching lines @@
   }
 #else
 #define CSA_SLOW_ASSERT(csa, x) ((void)0)
 #endif
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_