}
  filename = llvm::Twine(filename).concat(".mlir").str();
  return filename;
}

// Simple raw_ostream that prints to stderr.
struct LogInfoRawStream : public llvm::raw_ostream {
  LogInfoRawStream() { SetUnbuffered(); }
  ~LogInfoRawStream() override = default;
  uint64_t current_pos() const override { return 0; }

  void write_impl(const char* ptr, size_t size) override {