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