Import LLVM, at r72732.

1 files changed, 75 insertions, 0 deletions

diff --git a/include/llvm/ADT/Statistic.h b/include/llvm/ADT/Statistic.h
new file mode 100644
index 0000000..537f866
--- /dev/null
+++ b/include/llvm/ADT/Statistic.h
@@ -0,0 +1,75 @@
+//===-- llvm/ADT/Statistic.h - Easy way to expose stats ---------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the 'Statistic' class, which is designed to be an easy way
+// to expose various metrics from passes.  These statistics are printed at the
+// end of a run (from llvm_shutdown), when the -stats command line option is
+// passed on the command line.
+//
+// This is useful for reporting information like the number of instructions
+// simplified, optimized or removed by various transformations, like this:
+//
+// static Statistic NumInstsKilled("gcse", "Number of instructions killed");
+//
+// Later, in the code: ++NumInstsKilled;
+//
+// NOTE: Statistics *must* be declared as global variables.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ADT_STATISTIC_H
+#define LLVM_ADT_STATISTIC_H
+
+namespace llvm {
+
+class Statistic {
+public:
+  const char *Name;
+  const char *Desc;
+  unsigned Value : 31;
+  bool Initialized : 1;
+
+  unsigned 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;
+  }
+
+  // Allow use of this class as the value itself.
+  operator unsigned() const { return Value; }
+  const Statistic &operator=(unsigned Val) { Value = Val; return init(); }
+  const Statistic &operator++() { ++Value; return init(); }
+  unsigned operator++(int) { init(); return Value++; }
+  const Statistic &operator--() { --Value; return init(); }
+  unsigned operator--(int) { init(); return Value--; }
+  const Statistic &operator+=(const unsigned &V) { Value += V; return init(); }
+  const Statistic &operator-=(const unsigned &V) { Value -= V; return init(); }
+  const Statistic &operator*=(const unsigned &V) { Value *= V; return init(); }
+  const Statistic &operator/=(const unsigned &V) { Value /= V; return init(); }
+
+protected:
+  Statistic &init() {
+    if (!Initialized) RegisterStatistic();
+    return *this;
+  }
+  void RegisterStatistic();
+};
+
+// 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, DESC, 0, 0 }
+
+} // End llvm namespace
+
+#endif