Track heap objects.

src/ia32/stub-cache-ia32.cc

Index: src/ia32/stub-cache-ia32.cc
diff --git a/src/ia32/stub-cache-ia32.cc b/src/ia32/stub-cache-ia32.cc
index 9623b9a5203c5ccf44b4f27b23f81d917a22039a..4805d52e40668ad08b7a1bd3ed394ad465f7332c 100644
--- a/src/ia32/stub-cache-ia32.cc
+++ b/src/ia32/stub-cache-ia32.cc
@@ -826,6 +826,8 @@ void StubCompiler::GenerateStoreTransition(MacroAssembler* masm,
 
   if (FLAG_track_fields && representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_restore_name);
+  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+    __ JumpIfSmi(value_reg, miss_restore_name);
   } else if (FLAG_track_double_fields && representation.IsDouble()) {
     Label do_store, heap_number;
     __ AllocateHeapNumber(storage_reg, scratch1, scratch2, slow);
@@ -996,6 +998,8 @@ void StubCompiler::GenerateStoreField(MacroAssembler* masm,
   ASSERT(!representation.IsNone());
   if (FLAG_track_fields && representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_label);
+  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+    __ JumpIfSmi(value_reg, miss_label);
   } else if (FLAG_track_double_fields && representation.IsDouble()) {
     // Load the double storage.
     if (index < 0) {