Introduce HObjectAccess, which is used by LoadNamedField and StoreNamedField to denote what parts

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 8df7a297269fb1000e7ed8eacc5fbcb58fbbd2ea..05f68de1c987177bc5814065b6c8566e36c63704 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -1022,8 +1022,19 @@ class HGraphBuilder {
       KeyedAccessStoreMode store_mode,
       Representation checked_index_representation = Representation::None());
 
-  HInstruction* BuildStoreMap(HValue* object, HValue* map);
-  HInstruction* BuildStoreMap(HValue* object, Handle<Map> map);
+  HLoadNamedField * AddLoad(
+      HValue *object,
+      HObjectAccess access,
+      HValue *typecheck = NULL,
+      Representation representation = Representation::Tagged());
+
+  HStoreNamedField* AddStore(
+      HValue *object,
+      HObjectAccess access,
+      HValue *val,
+      Representation representation = Representation::Tagged());
+
+  HStoreNamedField* AddStoreMapConstant(HValue *object, Handle<Map>);
 
   HLoadNamedField* AddLoadElements(HValue *object, HValue *typecheck = NULL);