};

struct ValuePortHasher {
  std::size_t operator()(const ValuePort& other) const {
    return hash_combine(llvm::hash_value(other.producer.getOpaqueValue()),
                        hash_value(ArrayRef<unsigned int>(other.port)));
  }
};

using ValuePortResultMap =
    absl::flat_hash_map<ValuePort, Attribute, ValuePortHasher>;
using ComputedQueryFn = function_ref<bool(ValuePort)>;