[Atomics] code stubs for atomic operations

src/builtins.h

Index: src/builtins.h
diff --git a/src/builtins.h b/src/builtins.h
index 294929a290189691014ea048fb1af2a669e22ea5..3ba590ed18bce0d27d06bedc22e84c9672cb8c08 100644
--- a/src/builtins.h
+++ b/src/builtins.h
@@ -310,7 +310,8 @@ inline bool operator&(BuiltinExtraArguments lhs, BuiltinExtraArguments rhs) {
   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)                    \
@@ -661,6 +662,8 @@ class Builtins {
   static void Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm);
   static void Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm);
 
+  static void Generate_AtomicsLoadCheck(compiler::CodeStubAssembler* assembler);
+
   static void InitBuiltinFunctionTable();
 
   bool initialized_;