Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC)

[oota-llvm.git] / include / llvm / ADT / Statistic.h

diff --git a/include/llvm/ADT/Statistic.h b/include/llvm/ADT/Statistic.h
index 9bbda986a819e9becf1cf082a4d84f3615f68f59..d98abc375e8ac3a232a1b353dcfcb1d9b08b95cf 100644 (file)
--- a/include/llvm/ADT/Statistic.h
+++ b/include/llvm/ADT/Statistic.h
@@ -27,6 +27,7 @@
 #define LLVM_ADT_STATISTIC_H
 
 #include "llvm/Support/Atomic.h"
+#include "llvm/Support/Valgrind.h"
 
 namespace llvm {
 class raw_ostream;
@@ -45,12 +46,14 @@ public:
   /// 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();
   }
@@ -84,11 +87,13 @@ public:
   }
 
   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();
   }
@@ -103,11 +108,52 @@ public:
     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();