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975f05852d
Instead, the stat info is printed when llvm_shutdown() is called. These also don't need static ctors, but getting rid of them is uglier: still investigating. This reduces the number of static dtors in llvm from ~1400 to ~750. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32372 91177308-0d34-0410-b5e6-96231b3b80d8
69 lines
2.4 KiB
C++
69 lines
2.4 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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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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public:
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// Normal constructor, default initialize data item...
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Statistic(const char *name, const char *desc)
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: Name(name), Desc(desc), Value(0), Initialized(0) {
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}
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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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// 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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private:
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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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} // End llvm namespace
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#endif
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