#ifndef LLVM_ADT_STATISTIC_H
#define LLVM_ADT_STATISTIC_H
-#include "llvm/System/Atomic.h"
+#include "llvm/Support/Atomic.h"
+#include "llvm/Support/Valgrind.h"
namespace llvm {
+class raw_ostream;
class Statistic {
public:
const char *Name;
const char *Desc;
- unsigned Value;
+ volatile llvm::sys::cas_flag Value;
bool Initialized;
- unsigned getValue() const { return Value; }
+ llvm::sys::cas_flag 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;
+ Value = 0; Initialized = false;
}
// Allow use of this class as the value itself.
operator unsigned() const { return Value; }
- const Statistic &operator=(unsigned Val) {
+
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_STATS)
+ const Statistic &operator=(unsigned Val) {
Value = Val;
return init();
}
-
+
const Statistic &operator++() {
+ // FIXME: This function and all those that follow carefully use an
+ // atomic operation to update the value safely in the presence of
+ // concurrent accesses, but not to read the return value, so the
+ // return value is not thread safe.
sys::AtomicIncrement(&Value);
return init();
}
-
+
unsigned operator++(int) {
init();
unsigned OldValue = Value;
sys::AtomicIncrement(&Value);
return OldValue;
}
-
+
const Statistic &operator--() {
sys::AtomicDecrement(&Value);
return init();
}
-
+
unsigned operator--(int) {
init();
unsigned OldValue = Value;
sys::AtomicDecrement(&Value);
return OldValue;
}
-
+
const Statistic &operator+=(const unsigned &V) {
+ if (!V) return *this;
sys::AtomicAdd(&Value, V);
return init();
}
-
+
const Statistic &operator-=(const unsigned &V) {
+ if (!V) return *this;
sys::AtomicAdd(&Value, -V);
return init();
}
-
+
const Statistic &operator*=(const unsigned &V) {
sys::AtomicMul(&Value, V);
return init();
}
-
+
const Statistic &operator/=(const unsigned &V) {
sys::AtomicDiv(&Value, V);
return init();
}
+#else // Statistics are disabled in release builds.
+
+ const Statistic &operator=(unsigned Val) {
+ return *this;
+ }
+
+ const Statistic &operator++() {
+ return *this;
+ }
+
+ unsigned operator++(int) {
+ return 0;
+ }
+
+ const Statistic &operator--() {
+ return *this;
+ }
+
+ unsigned operator--(int) {
+ return 0;
+ }
+
+ const Statistic &operator+=(const unsigned &V) {
+ return *this;
+ }
+
+ const Statistic &operator-=(const unsigned &V) {
+ return *this;
+ }
+
+ const Statistic &operator*=(const unsigned &V) {
+ return *this;
+ }
+
+ const Statistic &operator/=(const unsigned &V) {
+ return *this;
+ }
+
+#endif // !defined(NDEBUG) || defined(LLVM_ENABLE_STATS)
+
protected:
Statistic &init() {
bool tmp = Initialized;
sys::MemoryFence();
if (!tmp) RegisterStatistic();
+ TsanHappensAfter(this);
return *this;
}
void RegisterStatistic();
#define STATISTIC(VARNAME, DESC) \
static llvm::Statistic VARNAME = { DEBUG_TYPE, DESC, 0, 0 }
+/// \brief Enable the collection and printing of statistics.
+void EnableStatistics();
+
+/// \brief Check if statistics are enabled.
+bool AreStatisticsEnabled();
+
+/// \brief Print statistics to the file returned by CreateInfoOutputFile().
+void PrintStatistics();
+
+/// \brief Print statistics to the given output stream.
+void PrintStatistics(raw_ostream &OS);
+
} // End llvm namespace
#endif