diff options
author | Dimitry Andric <dim@FreeBSD.org> | 2019-10-23 17:51:42 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2019-10-23 17:51:42 +0000 |
commit | 1d5ae1026e831016fc29fd927877c86af904481f (patch) | |
tree | 2cdfd12620fcfa5d9e4a0389f85368e8e36f63f9 /include/llvm/ADT/Statistic.h | |
parent | e6d1592492a3a379186bfb02bd0f4eda0669c0d5 (diff) |
Notes
Diffstat (limited to 'include/llvm/ADT/Statistic.h')
-rw-r--r-- | include/llvm/ADT/Statistic.h | 102 |
1 files changed, 53 insertions, 49 deletions
diff --git a/include/llvm/ADT/Statistic.h b/include/llvm/ADT/Statistic.h index 2ac59da596ef..b7387ddcf1c7 100644 --- a/include/llvm/ADT/Statistic.h +++ b/include/llvm/ADT/Statistic.h @@ -44,38 +44,39 @@ class raw_ostream; class raw_fd_ostream; class StringRef; -class Statistic { +class StatisticBase { public: const char *DebugType; const char *Name; const char *Desc; - std::atomic<unsigned> Value; - std::atomic<bool> Initialized; - unsigned getValue() const { return Value.load(std::memory_order_relaxed); } + StatisticBase(const char *DebugType, const char *Name, const char *Desc) + : DebugType(DebugType), Name(Name), Desc(Desc) {} + const char *getDebugType() const { return DebugType; } 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 *debugtype, const char *name, const char *desc) { - DebugType = debugtype; - Name = name; - Desc = desc; - Value = 0; - Initialized = false; - } +class TrackingStatistic : public StatisticBase { +public: + std::atomic<unsigned> Value; + std::atomic<bool> Initialized; + + TrackingStatistic(const char *DebugType, const char *Name, const char *Desc) + : StatisticBase(DebugType, Name, Desc), Value(0), Initialized(false) {} + + unsigned getValue() const { return Value.load(std::memory_order_relaxed); } // Allow use of this class as the value itself. operator unsigned() const { return getValue(); } -#if LLVM_ENABLE_STATS - const Statistic &operator=(unsigned Val) { + const TrackingStatistic &operator=(unsigned Val) { Value.store(Val, std::memory_order_relaxed); return init(); } - const Statistic &operator++() { + const TrackingStatistic &operator++() { Value.fetch_add(1, std::memory_order_relaxed); return init(); } @@ -85,7 +86,7 @@ public: return Value.fetch_add(1, std::memory_order_relaxed); } - const Statistic &operator--() { + const TrackingStatistic &operator--() { Value.fetch_sub(1, std::memory_order_relaxed); return init(); } @@ -95,14 +96,14 @@ public: return Value.fetch_sub(1, std::memory_order_relaxed); } - const Statistic &operator+=(unsigned V) { + const TrackingStatistic &operator+=(unsigned V) { if (V == 0) return *this; Value.fetch_add(V, std::memory_order_relaxed); return init(); } - const Statistic &operator-=(unsigned V) { + const TrackingStatistic &operator-=(unsigned V) { if (V == 0) return *this; Value.fetch_sub(V, std::memory_order_relaxed); @@ -119,54 +120,57 @@ public: init(); } -#else // Statistics are disabled in release builds. - - const Statistic &operator=(unsigned Val) { +protected: + TrackingStatistic &init() { + if (!Initialized.load(std::memory_order_acquire)) + RegisterStatistic(); return *this; } - const Statistic &operator++() { - return *this; - } + void RegisterStatistic(); +}; - unsigned operator++(int) { - return 0; - } +class NoopStatistic : public StatisticBase { +public: + using StatisticBase::StatisticBase; - const Statistic &operator--() { - return *this; - } + unsigned getValue() const { return 0; } - unsigned operator--(int) { - return 0; - } + // Allow use of this class as the value itself. + operator unsigned() const { return 0; } - const Statistic &operator+=(const unsigned &V) { - return *this; - } + const NoopStatistic &operator=(unsigned Val) { return *this; } - const Statistic &operator-=(const unsigned &V) { - return *this; - } + const NoopStatistic &operator++() { return *this; } - void updateMax(unsigned V) {} + unsigned operator++(int) { return 0; } -#endif // LLVM_ENABLE_STATS + const NoopStatistic &operator--() { return *this; } -protected: - Statistic &init() { - if (!Initialized.load(std::memory_order_acquire)) - RegisterStatistic(); - return *this; - } + unsigned operator--(int) { return 0; } - void RegisterStatistic(); + const NoopStatistic &operator+=(const unsigned &V) { return *this; } + + const NoopStatistic &operator-=(const unsigned &V) { return *this; } + + void updateMax(unsigned V) {} }; +#if LLVM_ENABLE_STATS +using Statistic = TrackingStatistic; +#else +using Statistic = NoopStatistic; +#endif + // 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 llvm::Statistic VARNAME = {DEBUG_TYPE, #VARNAME, DESC, {0}, {false}} + static llvm::Statistic VARNAME = {DEBUG_TYPE, #VARNAME, DESC} + +// ALWAYS_ENABLED_STATISTIC - A macro to define a statistic like STATISTIC but +// it is enabled even if LLVM_ENABLE_STATS is off. +#define ALWAYS_ENABLED_STATISTIC(VARNAME, DESC) \ + static llvm::TrackingStatistic VARNAME = {DEBUG_TYPE, #VARNAME, DESC} /// Enable the collection and printing of statistics. void EnableStatistics(bool PrintOnExit = true); |