Turn Array.isArray into a Turbofan stub

src/builtins.h

 // Copyright 2011 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_BUILTINS_H_
 #define V8_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/handles.h"
 
@@ skipping 42 matching lines @@
     UNINITIALIZED, kNoExtraICState)
 
 
 // Define list of builtins implemented in C++.
 #define BUILTIN_LIST_C(V)                                      \
   V(Illegal, kNone)                                            \
                                                                \
   V(EmptyFunction, kNone)                                      \
                                                                \
   V(ArrayConcat, kNone)                                        \
-  V(ArrayIsArray, kNone)                                       \
   V(ArrayPop, kNone)                                           \
   V(ArrayPush, kNone)                                          \
   V(ArrayShift, kNone)                                         \
   V(ArraySlice, kNone)                                         \
   V(ArraySplice, kNone)                                        \
   V(ArrayUnshift, kNone)                                       \
                                                                \
   V(ArrayBufferConstructor, kTarget)                           \
   V(ArrayBufferConstructor_ConstructStub, kTargetAndNewTarget) \
   V(ArrayBufferIsView, kNone)                                  \
@@ skipping 232 matching lines @@
   V(GeneratorPrototypeNext, 2)    \
   V(GeneratorPrototypeReturn, 2)  \
   V(GeneratorPrototypeThrow, 2)   \
   V(MathCeil, 2)                  \
   V(MathClz32, 2)                 \
   V(MathFloor, 2)                 \
   V(MathRound, 2)                 \
   V(MathSqrt, 2)                  \
   V(MathTrunc, 2)                 \
   V(ObjectHasOwnProperty, 2)      \
+  V(ArrayIsArray, 2)              \
   V(StringPrototypeCharAt, 2)     \
   V(StringPrototypeCharCodeAt, 2) \
   V(AtomicsLoad, 3)
 
 // Define list of builtin handlers implemented in assembly.
 #define BUILTIN_LIST_H(V)                    \
   V(LoadIC_Slow,             LOAD_IC)        \
   V(KeyedLoadIC_Slow,        KEYED_LOAD_IC)  \
   V(StoreIC_Slow,            STORE_IC)       \
   V(KeyedStoreIC_Slow,       KEYED_STORE_IC) \
@@ skipping 295 matching lines @@
   // ES6 section 25.3.1.2 Generator.prototype.next ( value )
   static void Generate_GeneratorPrototypeNext(CodeStubAssembler* assembler);
   // ES6 section 25.3.1.3 Generator.prototype.return ( value )
   static void Generate_GeneratorPrototypeReturn(CodeStubAssembler* assembler);
   // ES6 section 25.3.1.4 Generator.prototype.throw ( exception )
   static void Generate_GeneratorPrototypeThrow(CodeStubAssembler* assembler);
 
   // ES6 section 19.1.3.2 Object.prototype.hasOwnProperty
   static void Generate_ObjectHasOwnProperty(CodeStubAssembler* assembler);
 
+  // ES6 section 22.1.2.2 Array.isArray
+  static void Generate_ArrayIsArray(CodeStubAssembler* assembler);
+
   // ES6 section 21.1.3.1 String.prototype.charAt ( pos )
   static void Generate_StringPrototypeCharAt(CodeStubAssembler* assembler);
   // ES6 section 21.1.3.2 String.prototype.charCodeAt ( pos )
   static void Generate_StringPrototypeCharCodeAt(CodeStubAssembler* assembler);
 
   static void Generate_StringConstructor(MacroAssembler* masm);
   static void Generate_StringConstructor_ConstructStub(MacroAssembler* masm);
   static void Generate_OnStackReplacement(MacroAssembler* masm);
   static void Generate_InterruptCheck(MacroAssembler* masm);
   static void Generate_StackCheck(MacroAssembler* masm);
@@ skipping 36 matching lines @@
   friend class BuiltinFunctionTable;
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_H_