X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FSupport%2FStatistic.cpp;h=56c3b0f5659fa716e7c43cc567b9ac4d5f4bdc7d;hb=9988c292f1b6b38ecf7957ab3d6cd00b0b18c7dd;hp=13acc1b0fa1e541086c40724be001615ee5d0b4d;hpb=844731a7f1909f55935e3514c9e713a62d67662e;p=oota-llvm.git

diff --git a/lib/Support/Statistic.cpp b/lib/Support/Statistic.cpp
index 13acc1b0fa1..56c3b0f5659 100644
--- a/lib/Support/Statistic.cpp
+++ b/lib/Support/Statistic.cpp
@@ -22,34 +22,40 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/Format.h"
 #include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/Streams.h"
-#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/Mutex.h"
+#include "llvm/Support/raw_ostream.h"
 #include <algorithm>
-#include <ostream>
 #include <cstring>
 using namespace llvm;
 
-// GetLibSupportInfoOutputFile - Return a file stream to print our output on.
-namespace llvm { extern std::ostream *GetLibSupportInfoOutputFile(); }
+// CreateInfoOutputFile - Return a file stream to print our output on.
+namespace llvm { extern raw_ostream *CreateInfoOutputFile(); }
 
 /// -stats - Command line option to cause transformations to emit stats about
 /// what they did.
 ///
 static cl::opt<bool>
-Enabled("stats", cl::desc("Enable statistics output from program"));
+Enabled(
+    "stats",
+    cl::desc("Enable statistics output from program (available with Asserts)"));
 
 
 namespace {
 /// StatisticInfo - This class is used in a ManagedStatic so that it is created
-/// on demand (when the first statistic is bumped) and destroyed only when 
+/// on demand (when the first statistic is bumped) and destroyed only when
 /// llvm_shutdown is called.  We print statistics from the destructor.
 class StatisticInfo {
   std::vector<const Statistic*> Stats;
+  friend void llvm::PrintStatistics();
+  friend void llvm::PrintStatistics(raw_ostream &OS);
 public:
   ~StatisticInfo();
-  
+
   void addStatistic(const Statistic *S) {
     Stats.push_back(S);
   }
@@ -57,70 +63,101 @@ public:
 }
 
 static ManagedStatic<StatisticInfo> StatInfo;
-
+static ManagedStatic<sys::SmartMutex<true> > StatLock;
 
 /// RegisterStatistic - The first time a statistic is bumped, this method is
 /// called.
 void Statistic::RegisterStatistic() {
   // If stats are enabled, inform StatInfo that this statistic should be
   // printed.
-  if (Enabled)
-    StatInfo->addStatistic(this);
-  // Remember we have been registered.
-  Initialized = true;
-}
+  sys::SmartScopedLock<true> Writer(*StatLock);
+  if (!Initialized) {
+    if (Enabled)
+      StatInfo->addStatistic(this);
 
-namespace {
-
-struct NameCompare {
-  bool operator()(const Statistic *LHS, const Statistic *RHS) const {
-    int Cmp = std::strcmp(LHS->getName(), RHS->getName());
-    if (Cmp != 0) return Cmp < 0;
-    
-    // Secondary key is the description.
-    return std::strcmp(LHS->getDesc(), RHS->getDesc()) < 0;
+    TsanHappensBefore(this);
+    sys::MemoryFence();
+    // Remember we have been registered.
+    TsanIgnoreWritesBegin();
+    Initialized = true;
+    TsanIgnoreWritesEnd();
   }
-};
-
 }
 
 // Print information when destroyed, iff command line option is specified.
 StatisticInfo::~StatisticInfo() {
-  // Statistics not enabled?
-  if (Stats.empty()) return;
+  llvm::PrintStatistics();
+}
 
-  // Get the stream to write to.
-  std::ostream &OutStream = *GetLibSupportInfoOutputFile();
+void llvm::EnableStatistics() {
+  Enabled.setValue(true);
+}
+
+bool llvm::AreStatisticsEnabled() {
+  return Enabled;
+}
+
+void llvm::PrintStatistics(raw_ostream &OS) {
+  StatisticInfo &Stats = *StatInfo;
 
   // Figure out how long the biggest Value and Name fields are.
   unsigned MaxNameLen = 0, MaxValLen = 0;
-  for (size_t i = 0, e = Stats.size(); i != e; ++i) {
+  for (size_t i = 0, e = Stats.Stats.size(); i != e; ++i) {
     MaxValLen = std::max(MaxValLen,
-                         (unsigned)utostr(Stats[i]->getValue()).size());
+                         (unsigned)utostr(Stats.Stats[i]->getValue()).size());
     MaxNameLen = std::max(MaxNameLen,
-                          (unsigned)std::strlen(Stats[i]->getName()));
+                          (unsigned)std::strlen(Stats.Stats[i]->getName()));
   }
-  
+
   // Sort the fields by name.
-  std::stable_sort(Stats.begin(), Stats.end(), NameCompare());
+  std::stable_sort(Stats.Stats.begin(), Stats.Stats.end(),
+                   [](const Statistic *LHS, const Statistic *RHS) {
+    if (int Cmp = std::strcmp(LHS->getName(), RHS->getName()))
+      return Cmp < 0;
+
+    // Secondary key is the description.
+    return std::strcmp(LHS->getDesc(), RHS->getDesc()) < 0;
+  });
 
   // Print out the statistics header...
-  OutStream << "===" << std::string(73, '-') << "===\n"
-            << "                          ... Statistics Collected ...\n"
-            << "===" << std::string(73, '-') << "===\n\n";
-  
+  OS << "===" << std::string(73, '-') << "===\n"
+     << "                          ... Statistics Collected ...\n"
+     << "===" << std::string(73, '-') << "===\n\n";
+
   // Print all of the statistics.
-  for (size_t i = 0, e = Stats.size(); i != e; ++i) {
-    std::string CountStr = utostr(Stats[i]->getValue());
-    OutStream << std::string(MaxValLen-CountStr.size(), ' ')
-              << CountStr << " " << Stats[i]->getName()
-              << std::string(MaxNameLen-std::strlen(Stats[i]->getName()), ' ')
-              << " - " << Stats[i]->getDesc() << "\n";
-    
-  }
-  
-  OutStream << std::endl;  // Flush the output stream...
-  
-  if (&OutStream != cerr.stream() && &OutStream != cout.stream())
+  for (size_t i = 0, e = Stats.Stats.size(); i != e; ++i)
+    OS << format("%*u %-*s - %s\n",
+                 MaxValLen, Stats.Stats[i]->getValue(),
+                 MaxNameLen, Stats.Stats[i]->getName(),
+                 Stats.Stats[i]->getDesc());
+
+  OS << '\n';  // Flush the output stream.
+  OS.flush();
+
+}
+
+void llvm::PrintStatistics() {
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_STATS)
+  StatisticInfo &Stats = *StatInfo;
+
+  // Statistics not enabled?
+  if (Stats.Stats.empty()) return;
+
+  // Get the stream to write to.
+  raw_ostream &OutStream = *CreateInfoOutputFile();
+  PrintStatistics(OutStream);
+  delete &OutStream;   // Close the file.
+#else
+  // Check if the -stats option is set instead of checking
+  // !Stats.Stats.empty().  In release builds, Statistics operators
+  // do nothing, so stats are never Registered.
+  if (Enabled) {
+    // Get the stream to write to.
+    raw_ostream &OutStream = *CreateInfoOutputFile();
+    OutStream << "Statistics are disabled.  "
+            << "Build with asserts or with -DLLVM_ENABLE_STATS\n";
+    OutStream.flush();
     delete &OutStream;   // Close the file.
+  }
+#endif
 }