Mark CheckMaps that can cause migration with ChangesNewSpacePromotion.

src/hydrogen-instructions.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 2833 matching lines @@
 }
 
 
 HCheckMaps* HCheckMaps::New(Zone* zone,
                             HValue* context,
                             HValue* value,
                             Handle<Map> map,
                             CompilationInfo* info,
                             HValue* typecheck) {
   HCheckMaps* check_map = new(zone) HCheckMaps(value, zone, typecheck);
-  check_map->map_set_.Add(map, zone);
-  check_map->has_migration_target_ = map->is_migration_target();
+  check_map->Add(map, zone);
   if (map->CanOmitMapChecks() &&
       value->IsConstant() &&
       HConstant::cast(value)->InstanceOf(map)) {
     check_map->omit(info);
   }
   return check_map;
 }
 
 
 void HCheckMaps::FinalizeUniqueValueId() {
@@ skipping 1132 matching lines @@
       break;
     case kExternalMemory:
       stream->Add("[external-memory]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal