mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
122 lines
4.1 KiB
C++
122 lines
4.1 KiB
C++
//===-- Statistic.cpp - Easy way to expose stats information --------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the 'Statistic' class, which is designed to be an easy
|
|
// way to expose various success metrics from passes. These statistics are
|
|
// printed at the end of a run, when the -stats command line option is enabled
|
|
// 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 NumInstEliminated("GCSE", "Number of instructions killed");
|
|
//
|
|
// Later, in the code: ++NumInstEliminated;
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#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>
|
|
using namespace llvm;
|
|
|
|
// GetLibSupportInfoOutputFile - Return a file stream to print our output on.
|
|
namespace llvm { extern std::ostream *GetLibSupportInfoOutputFile(); }
|
|
|
|
/// -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"));
|
|
|
|
|
|
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
|
|
/// llvm_shutdown is called. We print statistics from the destructor.
|
|
class StatisticInfo {
|
|
std::vector<const Statistic*> Stats;
|
|
public:
|
|
~StatisticInfo();
|
|
|
|
void addStatistic(const Statistic *S) {
|
|
Stats.push_back(S);
|
|
}
|
|
};
|
|
}
|
|
|
|
static ManagedStatic<StatisticInfo> StatInfo;
|
|
|
|
|
|
/// 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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
};
|
|
|
|
// Print information when destroyed, iff command line option is specified.
|
|
StatisticInfo::~StatisticInfo() {
|
|
// Statistics not enabled?
|
|
if (Stats.empty()) return;
|
|
|
|
// Get the stream to write to.
|
|
std::ostream &OutStream = *GetLibSupportInfoOutputFile();
|
|
|
|
// Figure out how long the biggest Value and Name fields are.
|
|
unsigned MaxNameLen = 0, MaxValLen = 0;
|
|
for (unsigned 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()));
|
|
}
|
|
|
|
// Sort the fields by name.
|
|
std::stable_sort(Stats.begin(), Stats.end(), NameCompare());
|
|
|
|
// Print out the statistics header...
|
|
OutStream << "===" << std::string(73, '-') << "===\n"
|
|
<< " ... Statistics Collected ...\n"
|
|
<< "===" << std::string(73, '-') << "===\n\n";
|
|
|
|
// Print all of the statistics.
|
|
for (unsigned 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())
|
|
delete &OutStream; // Close the file.
|
|
}
|