62 struct Timer {  struct
63   explicit Timer(std::string &&name, TimerKind kind)  in Timer()  argument
67   void start() { startTime = std::chrono::system_clock::now(); }  in start()
70   void stop() {  in stop()
77   Timer *getChildTimer(const void *id, TimerKind kind,  in getChildTimer()
86   TimeRecord getTotalTime() {  in getTotalTime()
104   using ChildrenMap = llvm::MapVector<const void *, std::unique_ptr<Timer>>;
107   void merge(Timer &&other) {  in merge()
116   void mergeChildren(ChildrenMap &&otherChildren) {  in mergeChildren()
139   void mergeChild(ChildrenMap::value_type &&childIt) {  in mergeChild()
148   std::chrono::time_point<std::chrono::system_clock> startTime;
149   std::chrono::nanoseconds wallTime = std::chrono::nanoseconds(0);
150   std::chrono::nanoseconds userTime = std::chrono::nanoseconds(0);
153   ChildrenMap children;
156   std::string name;
159   TimerKind kind;