Introduce FeedbackNexus for vector-based ics.

src/ic/ic-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_IC_INL_H_
 #define V8_IC_INL_H_
 
 #include "src/ic/ic.h"
 
 #include "src/compiler.h"
@@ skipping 190 matching lines @@
   JSFunction* builtin_ctor = GetRootConstructor(type, native_context);
   if (builtin_ctor != NULL) {
     *flag = kCacheOnPrototype;
     return handle(builtin_ctor->initial_map());
   }
   *flag = kCacheOnReceiver;
   return TypeToMap(type, isolate);
 }
 
 
-inline Code* CallIC::get_host() {
+inline Code* IC::get_host() {
   return isolate()
       ->inner_pointer_to_code_cache()
       ->GetCacheEntry(address())
       ->code;
 }
-
-
-// static
-IC::State CallIC::FeedbackToState(Isolate* isolate, TypeFeedbackVector* vector,
-                                  FeedbackVectorICSlot slot) {
-  IC::State state = UNINITIALIZED;
-  Object* feedback = vector->Get(slot);
-
-  if (feedback == *TypeFeedbackVector::MegamorphicSentinel(isolate)) {
-    state = GENERIC;
-  } else if (feedback->IsAllocationSite() || feedback->IsJSFunction()) {
-    state = MONOMORPHIC;
-  } else {
-    CHECK(feedback == *TypeFeedbackVector::UninitializedSentinel(isolate));
-  }
-
-  return state;
-}
 }
 }  // namespace v8::internal
 
 #endif  // V8_IC_INL_H_