[builtins] Turn LoadIC_Miss and LoadIC_Slow builtins to TurboFan code stubs.

src/ic/ic.cc

 // 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.
 
 #include "src/ic/ic.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/api-arguments.h"
 #include "src/arguments.h"
@@ skipping 430 matching lines @@
   Object* feedback = nexus->vector()->Get(nexus->slot());
   State state = nexus->StateFromFeedback();
 
   if (state != UNINITIALIZED && !feedback->IsAllocationSite()) {
     nexus->ConfigureUninitialized();
     // The change in state must be processed.
     OnTypeFeedbackChanged(isolate, host);
   }
 }
 
+Handle<Code> LoadIC::slow_stub() const {
+  LoadICSlowStub stub(isolate());
+  return stub.GetCode();
+}
 
 void LoadIC::Clear(Isolate* isolate, Code* host, LoadICNexus* nexus) {
   if (IsCleared(nexus)) return;
   nexus->ConfigurePremonomorphic();
   OnTypeFeedbackChanged(isolate, host);
 }
 
 
 void StoreIC::Clear(Isolate* isolate, Code* host, StoreICNexus* nexus) {
   if (IsCleared(nexus)) return;
@@ skipping 2476 matching lines @@
     DCHECK_EQ(FeedbackVectorSlotKind::KEYED_LOAD_IC,
               vector->GetKind(vector_slot));
     KeyedLoadICNexus nexus(vector, vector_slot);
     KeyedLoadIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus);
     ic.UpdateState(receiver, key);
     RETURN_RESULT_OR_FAILURE(isolate, ic.Load(receiver, key));
   }
 }
 }  // namespace internal
 }  // namespace v8