Symbols for type cells.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 1658d71f9112dde1da8b486b7f84a1c855531c15..86a764ecd25728e89bc599cd8c7ddbd31ddcc0fb 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -4189,8 +4189,9 @@ void LCodeGen::DoCallNew(LCallNew* instr) {
   ASSERT(ToRegister(instr->result()).is(eax));
 
   // No cell in ebx for construct type feedback in optimized code
-  Handle<Object> undefined_value(isolate()->factory()->undefined_value());
-  __ mov(ebx, Immediate(undefined_value));
+  Handle<Object> megamorphic_symbol =
+      TypeFeedbackInfo::MegamorphicSentinel(isolate());
+  __ mov(ebx, Immediate(megamorphic_symbol));
   CallConstructStub stub(NO_CALL_FUNCTION_FLAGS);
   __ Set(eax, Immediate(instr->arity()));
   CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr);
@@ -4203,7 +4204,7 @@ void LCodeGen::DoCallNewArray(LCallNewArray* instr) {
   ASSERT(ToRegister(instr->result()).is(eax));
 
   __ Set(eax, Immediate(instr->arity()));
-  __ mov(ebx, factory()->undefined_value());
+  __ mov(ebx, TypeFeedbackInfo::MegamorphicSentinel(isolate()));
   ElementsKind kind = instr->hydrogen()->elements_kind();
   AllocationSiteOverrideMode override_mode =
       (AllocationSite::GetMode(kind) == TRACK_ALLOCATION_SITE)