llvm::StringMap<StringRef> dialect_name_of_;
  llvm::StringMap<StringRef> op_name_of_;
  std::vector<std::string> accepted_dialects_;
  std::vector<std::string> optional_accepted_dialects_;
  raw_ostream *os_;
  int total_ops_;
};
}  // namespace

void PrintOpStatsPass::runOnOperation() {
  op_with_dialect_count_.clear();
  dialect_count_.clear();
  dialect_name_of_.clear();