Symbols for type cells.

src/ia32/builtins-ia32.cc

Index: src/ia32/builtins-ia32.cc
diff --git a/src/ia32/builtins-ia32.cc b/src/ia32/builtins-ia32.cc
index d748d2362234ea67800e4f948a7ce50122750186..38c99e46d73027bffd2818400e9faeb3b118f8c1 100644
--- a/src/ia32/builtins-ia32.cc
+++ b/src/ia32/builtins-ia32.cc
@@ -473,9 +473,9 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
     // Invoke the code.
     if (is_construct) {
       // No type feedback cell is available
-      Handle<Object> undefined_sentinel(
-          masm->isolate()->heap()->undefined_value(), masm->isolate());
-      __ mov(ebx, Immediate(undefined_sentinel));
+      Handle<Object> megamorphic_sentinel =
+          TypeFeedbackInfo::MegamorphicSentinel(masm->isolate());
+      __ mov(ebx, Immediate(megamorphic_sentinel));
       CallConstructStub stub(NO_CALL_FUNCTION_FLAGS);
       __ CallStub(&stub);
     } else {
@@ -1057,10 +1057,9 @@ void Builtins::Generate_ArrayCode(MacroAssembler* masm) {
 
   // Run the native code for the Array function called as a normal function.
   // tail call a stub
-  Handle<Object> undefined_sentinel(
-      masm->isolate()->heap()->undefined_value(),
-      masm->isolate());
-  __ mov(ebx, Immediate(undefined_sentinel));
+  Handle<Object> megamorphic_sentinel =
+      TypeFeedbackInfo::MegamorphicSentinel(masm->isolate());
+  __ mov(ebx, Immediate(megamorphic_sentinel));
   ArrayConstructorStub stub(masm->isolate());
   __ TailCallStub(&stub);
 }