Use LookupIterator for CompileLoadInterceptor and delete Object::Lookup

src/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/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/codegen.h"
@@ skipping 1016 matching lines @@
   }
 
   Handle<HeapType> type = receiver_type();
   Handle<JSObject> holder = lookup->GetHolder<JSObject>();
   bool receiver_is_holder = object.is_identical_to(holder);
   // -------------- Interceptors --------------
   if (lookup->state() == LookupIterator::INTERCEPTOR) {
     DCHECK(!holder->GetNamedInterceptor()->getter()->IsUndefined());
     NamedLoadHandlerCompiler compiler(isolate(), receiver_type(), holder,
                                       cache_holder);
-    return compiler.CompileLoadInterceptor(name);
+    // Perform a lookup behind the interceptor. Copy the LookupIterator since
+    // the original iterator will be used to fetch the value.
+    LookupIterator it(lookup);
+    it.Next();
+    LookupForRead(&it);
+    return compiler.CompileLoadInterceptor(&it, name);
   }
   DCHECK(lookup->state() == LookupIterator::PROPERTY);
 
   // -------------- Accessors --------------
   if (lookup->property_kind() == LookupIterator::ACCESSOR) {
     // Use simple field loads for some well-known callback properties.
     if (receiver_is_holder) {
       DCHECK(object->IsJSObject());
       Handle<JSObject> receiver = Handle<JSObject>::cast(object);
       int object_offset;
@@ skipping 2122 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal