Introduce FeedbackNexus for vector-based ics.

src/ic/ic-state.cc

 // Copyright 2014 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.
 
 #include "src/v8.h"
 
 #include "src/ic/ic.h"
 #include "src/ic/ic-state.h"
 
 namespace v8 {
 namespace internal {
 
 // static
 void ICUtility::Clear(Isolate* isolate, Address address,
                       ConstantPoolArray* constant_pool) {
   IC::Clear(isolate, address, constant_pool);
 }
 
 
 // static
+template <class Nexus>
 void ICUtility::Clear(Isolate* isolate, Code::Kind kind, Code* host,
-                      TypeFeedbackVector* vector, FeedbackVectorICSlot slot) {
-  IC::Clear(isolate, kind, host, vector, slot);
+                      Nexus* nexus) {
+  IC::Clear<Nexus>(isolate, kind, host, nexus);
 }
 
 
+// Force instantiation of template instances for vector-based IC clearing.
+template void ICUtility::Clear<CallICNexus>(Isolate*, Code::Kind, Code*,
+                                            CallICNexus*);
+
+
 CallICState::CallICState(ExtraICState extra_ic_state)
     : argc_(ArgcBits::decode(extra_ic_state)),
       call_type_(CallTypeBits::decode(extra_ic_state)) {}
 
 
 ExtraICState CallICState::GetExtraICState() const {
   ExtraICState extra_ic_state =
       ArgcBits::encode(argc_) | CallTypeBits::encode(call_type_);
   return extra_ic_state;
 }
@@ skipping 576 matching lines @@
     case UNIQUE_NAME:
     case OBJECT:
     case GENERIC:
       return GENERIC;
   }
   UNREACHABLE();
   return GENERIC;  // Make the compiler happy.
 }
 }
 }  // namespace v8::internal