Basic support for tracking smi-only arrays on ia32.

src/runtime.h

Index: src/runtime.h
diff --git a/src/runtime.h b/src/runtime.h
index 1538b7d84656579659f09c33974016c79ed1d309..c6f77731f1fb0838fd6f91a63b8d45d9ebe69745 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -330,6 +330,8 @@ namespace internal {
   F(InitializeConstContextSlot, 3, 1) \
   F(OptimizeObjectForAddingMultipleProperties, 2, 1) \
   \
+  /* Arrays */ \
+  F(NonSmiElementStored, 1, 1) \
   /* Debugging */ \
   F(DebugPrint, 1, 1) \
   F(DebugTrace, 0, 1) \
@@ -354,6 +356,7 @@ namespace internal {
   F(IS_VAR, 1, 1) \
   \
   /* expose boolean functions from objects-inl.h */ \
+  F(HasFastSmiOnlyElements, 1, 1) \
   F(HasFastElements, 1, 1) \
   F(HasFastDoubleElements, 1, 1) \
   F(HasDictionaryElements, 1, 1) \