#include "llvm/ADT/Statistic.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Streams.h"
#include "llvm/ADT/StringExtras.h"
#include <algorithm>
#include <ostream>
#include <cstring>
using namespace llvm;
namespace llvm { extern std::ostream *GetLibSupportInfoOutputFile(); }
static cl::opt<bool>
Enabled("stats", cl::desc("Enable statistics output from program"));
namespace {
class StatisticInfo {
std::vector<const Statistic*> Stats;
public:
~StatisticInfo();
void addStatistic(const Statistic *S) {
Stats.push_back(S);
}
};
}
static ManagedStatic<StatisticInfo> StatInfo;
void Statistic::RegisterStatistic() {
if (Enabled)
StatInfo->addStatistic(this);
Initialized = true;
}
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;
return std::strcmp(LHS->getDesc(), RHS->getDesc()) < 0;
}
};
}
StatisticInfo::~StatisticInfo() {
if (Stats.empty()) return;
std::ostream &OutStream = *GetLibSupportInfoOutputFile();
unsigned MaxNameLen = 0, MaxValLen = 0;
for (size_t i = 0, e = Stats.size(); i != e; ++i) {
MaxValLen = std::max(MaxValLen,
(unsigned)utostr(Stats[i]->getValue()).size());
MaxNameLen = std::max(MaxNameLen,
(unsigned)std::strlen(Stats[i]->getName()));
}
std::stable_sort(Stats.begin(), Stats.end(), NameCompare());
OutStream << "===" << std::string(73, '-') << "===\n"
<< " ... Statistics Collected ...\n"
<< "===" << std::string(73, '-') << "===\n\n";
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;
if (&OutStream != cerr.stream() && &OutStream != cout.stream())
delete &OutStream; }