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authorDimitry Andric <dim@FreeBSD.org>2019-10-23 17:51:42 +0000
committerDimitry Andric <dim@FreeBSD.org>2019-10-23 17:51:42 +0000
commit1d5ae1026e831016fc29fd927877c86af904481f (patch)
tree2cdfd12620fcfa5d9e4a0389f85368e8e36f63f9 /include/llvm/ADT/Statistic.h
parente6d1592492a3a379186bfb02bd0f4eda0669c0d5 (diff)
Notes
Diffstat (limited to 'include/llvm/ADT/Statistic.h')
-rw-r--r--include/llvm/ADT/Statistic.h102
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);