Added LoadIC stub for getters.

src/ic.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 970 matching lines @@
         } else {
           // There is only one shared stub for loading normalized
           // properties. It does not traverse the prototype chain, so the
           // property must be found in the receiver for the stub to be
           // applicable.
           if (!holder.is_identical_to(receiver)) return;
           code = isolate()->stub_cache()->ComputeLoadNormal();
         }
         break;
       case CALLBACKS: {
-        Handle<Object> callback_object(lookup->GetCallbackObject());
-        if (!callback_object->IsAccessorInfo()) return;
-        Handle<AccessorInfo> callback =
-            Handle<AccessorInfo>::cast(callback_object);
-        if (v8::ToCData<Address>(callback->getter()) == 0) return;
-        code = isolate()->stub_cache()->ComputeLoadCallback(
-            name, receiver, holder, callback);
+        Handle<Object> callback(lookup->GetCallbackObject());
+        if (callback->IsAccessorInfo()) {
+          Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(callback);
+          if (v8::ToCData<Address>(info->getter()) == 0) return;
+          code = isolate()->stub_cache()->ComputeLoadCallback(
+              name, receiver, holder, info);
+        } else if (callback->IsAccessorPair()) {
+          Handle<Object> getter(Handle<AccessorPair>::cast(callback)->getter());
+          if (!getter->IsJSFunction()) return;
+          if (holder->IsGlobalObject()) return;
+          if (!receiver->HasFastProperties()) return;
+          code = isolate()->stub_cache()->ComputeLoadViaGetter(
+              name, receiver, holder, Handle<JSFunction>::cast(getter));
+        } else {
+          ASSERT(callback->IsForeign());
+          // No IC support for old-style native accessors.
+          return;
+        }
         break;
       }
       case INTERCEPTOR:
         ASSERT(HasInterceptorGetter(*holder));
         code = isolate()->stub_cache()->ComputeLoadInterceptor(
             name, receiver, holder);
         break;
       default:
         return;
     }
@@ skipping 1631 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal