Remove now-incorrect DataView accessor optimization

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 1021 matching lines @@
     case LookupIterator::ACCESSOR: {
       // Use simple field loads for some well-known callback properties.
       // The method will only return true for absolute truths based on the
       // receiver maps.
       int object_offset;
       if (Accessors::IsJSObjectFieldAccessor(map, lookup->name(),
                                              &object_offset)) {
         FieldIndex index = FieldIndex::ForInObjectOffset(object_offset, *map);
         return SimpleFieldLoad(index);
       }
-      if (Accessors::IsJSArrayBufferViewFieldAccessor(map, lookup->name(),
-                                                      &object_offset)) {
-        TRACE_HANDLER_STATS(isolate(), LoadIC_ArrayBufferViewLoadFieldStub);
-        FieldIndex index = FieldIndex::ForInObjectOffset(object_offset, *map);
-        ArrayBufferViewLoadFieldStub stub(isolate(), index);
-        return stub.GetCode();
-      }
 
       if (IsCompatibleReceiver(lookup, map)) {
         Handle<Object> accessors = lookup->GetAccessors();
         if (accessors->IsAccessorPair()) {
           if (!holder->HasFastProperties()) {
             TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub);
             return slow_stub();
           }
           // When debugging we need to go the slow path to flood the accessor.
           if (GetSharedFunctionInfo()->HasDebugInfo()) {
@@ skipping 115 matching lines @@
       it.Next();
       LookupForRead(&it);
       return compiler.CompileLoadInterceptor(&it);
     }
 
     case LookupIterator::ACCESSOR: {
 #ifdef DEBUG
       int object_offset;
       DCHECK(!Accessors::IsJSObjectFieldAccessor(map, lookup->name(),
                                                  &object_offset));
-      DCHECK(!Accessors::IsJSArrayBufferViewFieldAccessor(map, lookup->name(),
-                                                          &object_offset));
 #endif
 
       DCHECK(IsCompatibleReceiver(lookup, map));
       Handle<Object> accessors = lookup->GetAccessors();
       if (accessors->IsAccessorPair()) {
         DCHECK(holder->HasFastProperties());
         DCHECK(!GetSharedFunctionInfo()->HasDebugInfo());
         Handle<Object> getter(Handle<AccessorPair>::cast(accessors)->getter(),
                               isolate());
         CallOptimization call_optimization(getter);
@@ skipping 1798 matching lines @@
     KeyedLoadICNexus nexus(vector, vector_slot);
     KeyedLoadIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus);
     ic.UpdateState(receiver, key);
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, ic.Load(receiver, key));
   }
 
   return *result;
 }
 }  // namespace internal
 }  // namespace v8