Move of the type feedback vector to the closure.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 4ae8bba8a31d93242a9a3c876e436e17e9ba8a42..2293a54566abbc30d65d5fbc4ff809daa7f823f3 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -3315,11 +3315,19 @@ LiteralsArray* LiteralsArray::cast(Object* object) {
 
 
 TypeFeedbackVector* LiteralsArray::feedback_vector() const {
+  if (length() == 0) {
+    return TypeFeedbackVector::cast(
+        const_cast<FixedArray*>(FixedArray::cast(this)));
+  }
   return TypeFeedbackVector::cast(get(kVectorIndex));
 }
 
 
 void LiteralsArray::set_feedback_vector(TypeFeedbackVector* vector) {
+  if (length() <= kVectorIndex) {
+    DCHECK(vector->length() == 0);
+    return;
+  }
   set(kVectorIndex, vector);
 }
 
@@ -3333,6 +3341,9 @@ void LiteralsArray::set_literal(int literal_index, Object* literal) {
   set(kFirstLiteralIndex + literal_index, literal);
 }
 
+void LiteralsArray::set_literal_undefined(int literal_index) {
+  set_undefined(kFirstLiteralIndex + literal_index);
+}
 
 int LiteralsArray::literals_count() const {
   return length() - kFirstLiteralIndex;
@@ -5589,8 +5600,8 @@ ACCESSORS(SharedFunctionInfo, name, Object, kNameOffset)
 ACCESSORS(SharedFunctionInfo, optimized_code_map, FixedArray,
           kOptimizedCodeMapOffset)
 ACCESSORS(SharedFunctionInfo, construct_stub, Code, kConstructStubOffset)
-ACCESSORS(SharedFunctionInfo, feedback_vector, TypeFeedbackVector,
-          kFeedbackVectorOffset)
+ACCESSORS(SharedFunctionInfo, feedback_metadata, TypeFeedbackMetadata,
+          kFeedbackMetadataOffset)
 #if TRACE_MAPS
 SMI_ACCESSORS(SharedFunctionInfo, unique_id, kUniqueIdOffset)
 #endif
@@ -6258,6 +6269,10 @@ bool JSFunction::is_compiled() {
          code() != builtins->builtin(Builtins::kCompileOptimizedConcurrent);
 }
 
+TypeFeedbackVector* JSFunction::feedback_vector() {
+  LiteralsArray* array = literals();
+  return array->feedback_vector();
+}
 
 ACCESSORS(JSProxy, target, JSReceiver, kTargetOffset)
 ACCESSORS(JSProxy, handler, Object, kHandlerOffset)