Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Support/Timer.h b/linux-x64/clang/include/llvm/Support/Timer.h
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+//===-- llvm/Support/Timer.h - Interval Timing Support ----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_TIMER_H
+#define LLVM_SUPPORT_TIMER_H
+
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/DataTypes.h"
+#include <cassert>
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace llvm {
+
+class Timer;
+class TimerGroup;
+class raw_ostream;
+
+class TimeRecord {
+ double WallTime; ///< Wall clock time elapsed in seconds.
+ double UserTime; ///< User time elapsed.
+ double SystemTime; ///< System time elapsed.
+ ssize_t MemUsed; ///< Memory allocated (in bytes).
+public:
+ TimeRecord() : WallTime(0), UserTime(0), SystemTime(0), MemUsed(0) {}
+
+ /// Get the current time and memory usage. If Start is true we get the memory
+ /// usage before the time, otherwise we get time before memory usage. This
+ /// matters if the time to get the memory usage is significant and shouldn't
+ /// be counted as part of a duration.
+ static TimeRecord getCurrentTime(bool Start = true);
+
+ double getProcessTime() const { return UserTime + SystemTime; }
+ double getUserTime() const { return UserTime; }
+ double getSystemTime() const { return SystemTime; }
+ double getWallTime() const { return WallTime; }
+ ssize_t getMemUsed() const { return MemUsed; }
+
+ bool operator<(const TimeRecord &T) const {
+ // Sort by Wall Time elapsed, as it is the only thing really accurate
+ return WallTime < T.WallTime;
+ }
+
+ void operator+=(const TimeRecord &RHS) {
+ WallTime += RHS.WallTime;
+ UserTime += RHS.UserTime;
+ SystemTime += RHS.SystemTime;
+ MemUsed += RHS.MemUsed;
+ }
+ void operator-=(const TimeRecord &RHS) {
+ WallTime -= RHS.WallTime;
+ UserTime -= RHS.UserTime;
+ SystemTime -= RHS.SystemTime;
+ MemUsed -= RHS.MemUsed;
+ }
+
+ /// Print the current time record to \p OS, with a breakdown showing
+ /// contributions to the \p Total time record.
+ void print(const TimeRecord &Total, raw_ostream &OS) const;
+};
+
+/// This class is used to track the amount of time spent between invocations of
+/// its startTimer()/stopTimer() methods. Given appropriate OS support it can
+/// also keep track of the RSS of the program at various points. By default,
+/// the Timer will print the amount of time it has captured to standard error
+/// when the last timer is destroyed, otherwise it is printed when its
+/// TimerGroup is destroyed. Timers do not print their information if they are
+/// never started.
+class Timer {
+ TimeRecord Time; ///< The total time captured.
+ TimeRecord StartTime; ///< The time startTimer() was last called.
+ std::string Name; ///< The name of this time variable.
+ std::string Description; ///< Description of this time variable.
+ bool Running; ///< Is the timer currently running?
+ bool Triggered; ///< Has the timer ever been triggered?
+ TimerGroup *TG = nullptr; ///< The TimerGroup this Timer is in.
+
+ Timer **Prev; ///< Pointer to \p Next of previous timer in group.
+ Timer *Next; ///< Next timer in the group.
+public:
+ explicit Timer(StringRef Name, StringRef Description) {
+ init(Name, Description);
+ }
+ Timer(StringRef Name, StringRef Description, TimerGroup &tg) {
+ init(Name, Description, tg);
+ }
+ Timer(const Timer &RHS) {
+ assert(!RHS.TG && "Can only copy uninitialized timers");
+ }
+ const Timer &operator=(const Timer &T) {
+ assert(!TG && !T.TG && "Can only assign uninit timers");
+ return *this;
+ }
+ ~Timer();
+
+ /// Create an uninitialized timer, client must use 'init'.
+ explicit Timer() {}
+ void init(StringRef Name, StringRef Description);
+ void init(StringRef Name, StringRef Description, TimerGroup &tg);
+
+ const std::string &getName() const { return Name; }
+ const std::string &getDescription() const { return Description; }
+ bool isInitialized() const { return TG != nullptr; }
+
+ /// Check if the timer is currently running.
+ bool isRunning() const { return Running; }
+
+ /// Check if startTimer() has ever been called on this timer.
+ bool hasTriggered() const { return Triggered; }
+
+ /// Start the timer running. Time between calls to startTimer/stopTimer is
+ /// counted by the Timer class. Note that these calls must be correctly
+ /// paired.
+ void startTimer();
+
+ /// Stop the timer.
+ void stopTimer();
+
+ /// Clear the timer state.
+ void clear();
+
+ /// Return the duration for which this timer has been running.
+ TimeRecord getTotalTime() const { return Time; }
+
+private:
+ friend class TimerGroup;
+};
+
+/// The TimeRegion class is used as a helper class to call the startTimer() and
+/// stopTimer() methods of the Timer class. When the object is constructed, it
+/// starts the timer specified as its argument. When it is destroyed, it stops
+/// the relevant timer. This makes it easy to time a region of code.
+class TimeRegion {
+ Timer *T;
+ TimeRegion(const TimeRegion &) = delete;
+
+public:
+ explicit TimeRegion(Timer &t) : T(&t) {
+ T->startTimer();
+ }
+ explicit TimeRegion(Timer *t) : T(t) {
+ if (T) T->startTimer();
+ }
+ ~TimeRegion() {
+ if (T) T->stopTimer();
+ }
+};
+
+/// This class is basically a combination of TimeRegion and Timer. It allows
+/// you to declare a new timer, AND specify the region to time, all in one
+/// statement. All timers with the same name are merged. This is primarily
+/// used for debugging and for hunting performance problems.
+struct NamedRegionTimer : public TimeRegion {
+ explicit NamedRegionTimer(StringRef Name, StringRef Description,
+ StringRef GroupName,
+ StringRef GroupDescription, bool Enabled = true);
+};
+
+/// The TimerGroup class is used to group together related timers into a single
+/// report that is printed when the TimerGroup is destroyed. It is illegal to
+/// destroy a TimerGroup object before all of the Timers in it are gone. A
+/// TimerGroup can be specified for a newly created timer in its constructor.
+class TimerGroup {
+ struct PrintRecord {
+ TimeRecord Time;
+ std::string Name;
+ std::string Description;
+
+ PrintRecord(const PrintRecord &Other) = default;
+ PrintRecord(const TimeRecord &Time, const std::string &Name,
+ const std::string &Description)
+ : Time(Time), Name(Name), Description(Description) {}
+
+ bool operator <(const PrintRecord &Other) const {
+ return Time < Other.Time;
+ }
+ };
+ std::string Name;
+ std::string Description;
+ Timer *FirstTimer = nullptr; ///< First timer in the group.
+ std::vector<PrintRecord> TimersToPrint;
+
+ TimerGroup **Prev; ///< Pointer to Next field of previous timergroup in list.
+ TimerGroup *Next; ///< Pointer to next timergroup in list.
+ TimerGroup(const TimerGroup &TG) = delete;
+ void operator=(const TimerGroup &TG) = delete;
+
+public:
+ explicit TimerGroup(StringRef Name, StringRef Description);
+ ~TimerGroup();
+
+ void setName(StringRef NewName, StringRef NewDescription) {
+ Name.assign(NewName.begin(), NewName.end());
+ Description.assign(NewDescription.begin(), NewDescription.end());
+ }
+
+ /// Print any started timers in this group and zero them.
+ void print(raw_ostream &OS);
+
+ /// This static method prints all timers and clears them all out.
+ static void printAll(raw_ostream &OS);
+
+ /// Prints all timers as JSON key/value pairs, and clears them all out.
+ static const char *printAllJSONValues(raw_ostream &OS, const char *delim);
+
+ /// Ensure global timer group lists are initialized. This function is mostly
+ /// used by the Statistic code to influence the construction and destruction
+ /// order of the global timer lists.
+ static void ConstructTimerLists();
+private:
+ friend class Timer;
+ friend void PrintStatisticsJSON(raw_ostream &OS);
+ void addTimer(Timer &T);
+ void removeTimer(Timer &T);
+ void prepareToPrintList();
+ void PrintQueuedTimers(raw_ostream &OS);
+ void printJSONValue(raw_ostream &OS, const PrintRecord &R,
+ const char *suffix, double Value);
+ const char *printJSONValues(raw_ostream &OS, const char *delim);
+};
+
+} // end namespace llvm
+
+#endif