Array constructor expects AllocationSite or undefined as feedback.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 2a1525810ee8eb14801d27301f96dde9cbc5dd15..f0005ef30005eeb8440018c952dd8949ab2f02a0 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -3912,9 +3912,7 @@ void LCodeGen::DoCallNew(LCallNew* instr) {
 
   __ mov(r0, Operand(instr->arity()));
   // No cell in r2 for construct type feedback in optimized code
-  Handle<Object> megamorphic_symbol =
-      TypeFeedbackInfo::MegamorphicSentinel(isolate());
-  __ mov(r2, Operand(megamorphic_symbol));
+  __ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
   CallConstructStub stub(NO_CALL_FUNCTION_FLAGS);
   CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr);
 }
@@ -3926,7 +3924,7 @@ void LCodeGen::DoCallNewArray(LCallNewArray* instr) {
   ASSERT(ToRegister(instr->result()).is(r0));
 
   __ mov(r0, Operand(instr->arity()));
-  __ mov(r2, Operand(TypeFeedbackInfo::MegamorphicSentinel(isolate())));
+  __ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
   ElementsKind kind = instr->hydrogen()->elements_kind();
   AllocationSiteOverrideMode override_mode =
       (AllocationSite::GetMode(kind) == TRACK_ALLOCATION_SITE)