message: Disable constant folding and arithmetic optimizations for functions.
diff: @@ -243,6 +243,10 @@ Status MetaOptimizer::Optimize(Cluster* cluster, const GrapplerItem& item,
  std::unordered_set<string> optimized_funcs;
  bool optimize_function_library = true;
  + // TODO(ezhulenev): turn it on after fixing ranklab: tune_tf_test.
  + cfg_.set_constant_folding(RewriterConfig::OFF);
  + cfg_.set_arithmetic_optimization(RewriterConfig::OFF);
  +
  while (optimize_function_library) {
  optimize_function_library = false;
  