Basic support for tracking smi-only arrays on ia32.

src/stub-cache.h

Index: src/stub-cache.h
diff --git a/src/stub-cache.h b/src/stub-cache.h
index 18c157b165f24738a96fbf4c75826fa316bf26f9..ca6eec914b1594f71d94a092d2fa5db91e96d045 100644
--- a/src/stub-cache.h
+++ b/src/stub-cache.h
@@ -703,8 +703,14 @@ class KeyedStoreStubCompiler: public StubCompiler {
       MapList* receiver_maps,
       CodeList* handler_ics);
 
+  enum StoreObjectAction {
+    kObjectStoreCausesWriteBarrier,
+    kObjectStoreForcesGeneric
+  };
+
   static void GenerateStoreFastElement(MacroAssembler* masm,
-                                       bool is_js_array);
+                                       bool is_js_array,
+                                       StoreObjectAction store_object_action);
 
   static void GenerateStoreFastDoubleElement(MacroAssembler* masm,
                                              bool is_js_array);