// Prints MLIR after specified passes. Supports regular expressions for
  // matching against the names of the desired passes. Currently only prints
  // after a pass if the MLIR is mutated.
  optional string print_ir_after = 6 [default = ""];

  // If true, always print the top-level operation when printing IR for
  // print_ir_[before|after].
  optional bool print_ir_module_scope = 7 [default = true];

                     llvm::raw_ostream& out) {
  std::string dump_dir = options.ir_dump_dir();

  bool dump_to_dir = !dump_dir.empty();
  bool print_to_stdout =
      !options.print_ir_before().empty() || !options.print_ir_after().empty();

  if (dump_to_dir || print_to_stdout) {
    // Necessary for maintaining sequence of passes when dumping MLIR to files
    // or stdout.
    pm.getContext()->disableMultithreading();
  }