| //===-- llvm/ADT/Statistic.h - Easy way to expose stats ---------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by the LLVM research group and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the 'Statistic' class, which is designed to be an easy way |
| // to expose various metrics from passes. These statistics are printed at the |
| // end of a run (from llvm_shutdown), when the -stats command line option is |
| // passed on the command line. |
| // |
| // This is useful for reporting information like the number of instructions |
| // simplified, optimized or removed by various transformations, like this: |
| // |
| // static Statistic NumInstsKilled("gcse", "Number of instructions killed"); |
| // |
| // Later, in the code: ++NumInstsKilled; |
| // |
| // NOTE: Statistics *must* be declared as global variables. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_ADT_STATISTIC_H |
| #define LLVM_ADT_STATISTIC_H |
| |
| namespace llvm { |
| |
| class Statistic { |
| public: |
| const char *Name; |
| const char *Desc; |
| unsigned Value : 31; |
| bool Initialized : 1; |
| |
| unsigned getValue() const { return Value; } |
| const char *getName() const { return Name; } |
| const char *getDesc() const { return Desc; } |
| |
| /// construct - This should only be called for non-global statistics. |
| void construct(const char *name, const char *desc) { |
| Name = name; Desc = desc; |
| Value = 0; Initialized = 0; |
| } |
| |
| // Allow use of this class as the value itself. |
| operator unsigned() const { return Value; } |
| const Statistic &operator=(unsigned Val) { Value = Val; return init(); } |
| const Statistic &operator++() { ++Value; return init(); } |
| unsigned operator++(int) { init(); return Value++; } |
| const Statistic &operator--() { --Value; return init(); } |
| unsigned operator--(int) { init(); return Value--; } |
| const Statistic &operator+=(const unsigned &V) { Value += V; return init(); } |
| const Statistic &operator-=(const unsigned &V) { Value -= V; return init(); } |
| const Statistic &operator*=(const unsigned &V) { Value *= V; return init(); } |
| const Statistic &operator/=(const unsigned &V) { Value /= V; return init(); } |
| |
| protected: |
| Statistic &init() { |
| if (!Initialized) RegisterStatistic(); |
| return *this; |
| } |
| void RegisterStatistic(); |
| }; |
| |
| // STATISTIC - A macro to make definition of statistics really simple. This |
| // automatically passes the DEBUG_TYPE of the file into the statistic. |
| #define STATISTIC(VARNAME, DESC) \ |
| static Statistic VARNAME = { DEBUG_TYPE, DESC, 0, 0 } |
| |
| } // End llvm namespace |
| |
| #endif |