Added LoadIC stub for getters.

src/ic.cc

Index: src/ic.cc
diff --git a/src/ic.cc b/src/ic.cc
index 134ef8b843fbff585aa05ada077b5a919eca7a06..0c9e85699b37b4a0c7b88afebf6b56b75122dd35 100644
--- a/src/ic.cc
+++ b/src/ic.cc
@@ -988,13 +988,24 @@ void LoadIC::UpdateCaches(LookupResult* lookup,
         }
         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: