message: Dump out the compiled graph at VLOG(1)
diff: @@ -276,6 +276,7 @@ StatusOr<std::unique_ptr<Executable>> PoplarCompiler::Compile(
  }
  VLOG(1) << "Compiling main computation " << entry->name();
  + XLA_VLOG_LINES(1, entry->ToString());
  EntryVisitor visitor(graph, resources, entry->num_parameters());
  try {
  