[turbofan] Add support for copy-on-write element stores.

src/builtins/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_BUILTINS_H_
 #define V8_BUILTINS_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/handles.h"
 
@@ skipping 141 matching lines @@
   /* API callback handling */                                                \
   API(HandleApiCall)                                                         \
   API(HandleApiCallAsFunction)                                               \
   API(HandleApiCallAsConstructor)                                            \
   ASM(HandleFastApiCall)                                                     \
                                                                              \
   /* Adapters for Turbofan into runtime */                                   \
   ASM(AllocateInNewSpace)                                                    \
   ASM(AllocateInOldSpace)                                                    \
                                                                              \
+  /* FixedArray helpers */                                                   \
+  TFS(CopyFixedArray, BUILTIN, kNoExtraICState, CopyFixedArray)              \
+                                                                             \
   /* Debugger */                                                             \
   DBG(FrameDropper_LiveEdit)                                                 \
   DBG(Return_DebugBreak)                                                     \
   DBG(Slot_DebugBreak)                                                       \
                                                                              \
   /* Type conversions */                                                     \
   TFS(ToBoolean, BUILTIN, kNoExtraICState, TypeConversion)                   \
   TFS(OrdinaryToPrimitive_Number, BUILTIN, kNoExtraICState, TypeConversion)  \
   TFS(OrdinaryToPrimitive_String, BUILTIN, kNoExtraICState, TypeConversion)  \
   TFS(NonPrimitiveToPrimitive_Default, BUILTIN, kNoExtraICState,             \
@@ skipping 478 matching lines @@
 
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_H_