[Atomics] code stubs for atomic operations

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 292 matching lines @@
 #define BUILTIN_LIST_T(V)        \
   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(ObjectHasOwnProperty, 2)     \
+  V(AtomicsLoadCheck, 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) \
   V(LoadIC_Normal,           LOAD_IC)        \
   V(StoreIC_Normal,          STORE_IC)
 
@@ skipping 330 matching lines @@
       MacroAssembler* masm);                                 \
   static void Generate_Make##C##CodeYoungAgainOddMarking(    \
       MacroAssembler* masm);
   CODE_AGE_LIST(DECLARE_CODE_AGE_BUILTIN_GENERATOR)
 #undef DECLARE_CODE_AGE_BUILTIN_GENERATOR
 
   static void Generate_MarkCodeAsToBeExecutedOnce(MacroAssembler* masm);
   static void Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm);
   static void Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm);
 
+  static void Generate_AtomicsLoadCheck(compiler::CodeStubAssembler* assembler);
+
   static void InitBuiltinFunctionTable();
 
   bool initialized_;
 
   friend class BuiltinFunctionTable;
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_H_