message: Re-enable hoisting of coeff-wise unary chains out of Split and into Concat.
diff: @@ -61,7 +61,7 @@ class ArithmeticOptimizer : public GraphOptimizer {
  bool fold_multiply_into_conv = true;
  bool fold_transpose_into_matmul = true;
  bool hoist_common_factor_out_of_aggregation = true;
  - bool hoist_cwise_unary_chains = false;
  + bool hoist_cwise_unary_chains = true;
  bool minimize_broadcasts = true;
  bool optimize_max_or_min_of_monotonic = true;
  bool remove_idempotent = true;
  