Perform HasFastProperties check on prototypes when computing call targets in Crankshaft, part 2.

src/hydrogen.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 5619 matching lines @@
   HValue* context = environment()->LookupContext();
   return new(zone()) HLoadNamedGeneric(context, obj, name);
 }
 
 
 static void LookupInPrototypes(Handle<Map> map,
                                Handle<String> name,
                                LookupResult* lookup) {
   while (map->prototype()->IsJSObject()) {
     Handle<JSObject> holder(JSObject::cast(map->prototype()));
+    if (!holder->HasFastProperties()) break;
     map = Handle<Map>(holder->map());
     map->LookupDescriptor(*holder, *name, lookup);
     if (lookup->IsFound()) return;
   }
   lookup->NotFound();
 }
 
 
 HInstruction* HGraphBuilder::BuildCallGetter(HValue* obj,
                                              Property* expr,
@@ skipping 3916 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal