Further reduce LookupResult usage

src/hydrogen-instructions.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/double.h"
 #include "src/factory.h"
 #include "src/hydrogen-infer-representation.h"
 #include "src/property-details-inl.h"
@@ skipping 4624 matching lines @@
 
 
 HObjectAccess HObjectAccess::ForBackingStoreOffset(int offset,
     Representation representation) {
   DCHECK(offset >= 0);
   return HObjectAccess(kBackingStore, offset, representation,
                        Handle<String>::null(), false, false);
 }
 
 
-HObjectAccess HObjectAccess::ForField(Handle<Map> map,
-                                      LookupResult* lookup,
+HObjectAccess HObjectAccess::ForField(Handle<Map> map, int index,
+                                      Representation representation,
                                       Handle<String> name) {
-  DCHECK(lookup->IsField() || lookup->IsTransitionToField());
-  int index;
-  Representation representation;
-  if (lookup->IsField()) {
-    index = lookup->GetLocalFieldIndexFromMap(*map);
-    representation = lookup->representation();
-  } else {
-    Map* transition = lookup->GetTransitionTarget();
-    int descriptor = transition->LastAdded();
-    index = transition->instance_descriptors()->GetFieldIndex(descriptor) -
-        map->inobject_properties();
-    PropertyDetails details =
-        transition->instance_descriptors()->GetDetails(descriptor);
-    representation = details.representation();
-  }
   if (index < 0) {
     // Negative property indices are in-object properties, indexed
     // from the end of the fixed part of the object.
     int offset = (index * kPointerSize) + map->instance_size();
     return HObjectAccess(kInobject, offset, representation, name, false, true);
   } else {
     // Non-negative property indices are in the properties array.
     int offset = (index * kPointerSize) + FixedArray::kHeaderSize;
     return HObjectAccess(kBackingStore, offset, representation, name,
                          false, false);
@@ skipping 109 matching lines @@
       break;
     case HObjectAccess::kExternalMemory:
       os << "[external-memory]";
       break;
   }
 
   return os << "@" << access.offset();
 }
 
 } }  // namespace v8::internal