[Atomics] code stubs for atomic operations

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index afc5ccacc33cc8f837d081c2145470467fa8b6c0..d8b3866236835ae0ebc42a780d9173a03bbd1d45 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -373,5 +373,11 @@ Callable CodeFactory::InterpreterCEntry(Isolate* isolate, int result_size) {
   return Callable(stub.GetCode(), InterpreterCEntryDescriptor(isolate));
 }
 
+
+Callable CodeFactory::AtomicsLoad(Isolate* isolate) {
+  AtomicsLoadStub stub(isolate);
+  return Callable(stub.GetCode(), AtomicsLoadDescriptor(isolate));
+}
+
 }  // namespace internal
 }  // namespace v8