Statistics.cpp

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/*
 * Copyright 2020 Nico Reißmann <nico.reissmann@gmail.com>
 * Copyright 2024 Håvard Krogstie <krogstie.havard@gmail.com>
 * See COPYING for terms of redistribution.
 */
 
#include <jlm/util/Statistics.hpp>
 
#include <jlm/util/BijectiveMap.hpp>
#include <jlm/util/strfmt.hpp>
 
#include <string_view>
 
namespace jlm::util
{
// Mapping between each statistics id and identifier used when serializing the statistic
static const util::BijectiveMap<Statistics::Id, std::string_view> &
GetStatisticsIdNames()
{
  static util::BijectiveMap<Statistics::Id, std::string_view> mapping = {
    { Statistics::Id::AggregateAllocaSplitting, "AggregateAllocaSplitting" },
    { Statistics::Id::Aggregation, "Aggregation" },
    { Statistics::Id::AgnosticModRefSummarizer, "AgnosticModRefSummarizer" },
    { Statistics::Id::AliasAnalysisPrecisionEvaluation, "AliasAnalysisPrecisionEvaluation" },
    { Statistics::Id::AndersenAnalysis, "AndersenAnalysis" },
    { Statistics::Id::Annotation, "Annotation" },
    { Statistics::Id::CommonNodeElimination, "CNE" },
    { Statistics::Id::ControlFlowRecovery, "ControlFlowRestructuring" },
    { Statistics::Id::DataNodeToDelta, "DataNodeToDeltaStatistics" },
    { Statistics::Id::DeadNodeElimination, "DeadNodeElimination" },
    { Statistics::Id::FunctionInlining, "ILN" },
    { Statistics::Id::IfConversion, "IfConversion" },
    { Statistics::Id::JlmToRvsdgConversion, "ControlFlowGraphToLambda" },
    { Statistics::Id::LoopStrengthReduction, "LoopStrengthReduction" },
    { Statistics::Id::LoopUnrolling, "UNROLL" },
    { Statistics::Id::LoopUnswitching, "LoopUnswitching" },
    { Statistics::Id::InvariantValueRedirection, "InvariantValueRedirection" },
    { Statistics::Id::MemoryStateEncoder, "MemoryStateEncoder" },
    { Statistics::Id::PullNodes, "PULL" },
    { Statistics::Id::PushNodes, "PUSH" },
    { Statistics::Id::ReduceNodes, "RED" },
    { Statistics::Id::RegionAwareModRefSummarizer, "RegionAwareModRefSummarizer" },
    { Statistics::Id::RvsdgConstruction, "InterProceduralGraphToRvsdg" },
    { Statistics::Id::RvsdgDestruction, "RVSDGDESTRUCTION" },
    { Statistics::Id::RvsdgOptimization, "RVSDGOPTIMIZATION" },
    { Statistics::Id::RvsdgTreePrinter, "RvsdgTreePrinter" },
    { Statistics::Id::ScalarEvolution, "ScalarEvolution" },
    { Statistics::Id::StoreValueForwarding, "StoreValueForwarding" },
  };
  // Make sure every Statistic is mentioned in the mapping
  auto lastIdx = static_cast<size_t>(Statistics::Id::LastEnumValue);
  auto firstIdx = static_cast<size_t>(Statistics::Id::FirstEnumValue);
  JLM_ASSERT(mapping.Size() == lastIdx - firstIdx - 1);
  return mapping;
}
 
Statistics::~Statistics() = default;
 
std::string_view
Statistics::GetName() const
{
  return GetStatisticsIdNames().LookupKey(StatisticsId_);
}
 
const util::FilePath &
Statistics::GetSourceFile() const
{
  return SourceFile_;
}
 
std::string
Statistics::Serialize(char fieldSeparator, char nameValueSeparator) const
{
  std::ostringstream ss;
 
  ss << GetName() << fieldSeparator;
  ss << GetSourceFile().to_str();
 
  for (const auto & [mName, measurement] : Measurements_)
  {
    if (ss.tellp() != 0)
      ss << fieldSeparator;
 
    ss << mName << nameValueSeparator;
    std::visit(
        [&](const auto & value)
        {
          ss << value;
        },
        measurement);
  }
  for (const auto & [mName, timer] : Timers_)
  {
    if (ss.tellp() != 0)
      ss << fieldSeparator;
 
    ss << mName << "[ns]" << nameValueSeparator << timer.ns();
  }
 
  return ss.str();
}
 
bool
Statistics::HasMeasurement(const std::string & name) const noexcept
{
  for (const auto & [mName, _] : Measurements_)
    if (mName == name)
      return true;
  return false;
}
 
const Statistics::Measurement &
Statistics::GetMeasurement(const std::string & name) const
{
  for (const auto & [mName, measurement] : Measurements_)
    if (mName == name)
      return measurement;
  JLM_UNREACHABLE("Unknown measurement");
}
 
IteratorRange<Statistics::MeasurementList::const_iterator>
Statistics::GetMeasurements() const
{
  return { Measurements_.begin(), Measurements_.end() };
}
 
bool
Statistics::HasTimer(const std::string & name) const noexcept
{
  for (const auto & [mName, _] : Timers_)
    if (mName == name)
      return true;
  return false;
}
 
util::Timer &
Statistics::GetTimer(const std::string & name)
{
  for (auto & [mName, timer] : Timers_)
    if (mName == name)
      return timer;
  JLM_UNREACHABLE("Unknown Timer");
}
 
const util::Timer &
Statistics::GetTimer(const std::string & name) const
{
  return const_cast<Statistics *>(this)->GetTimer(name);
}
 
IteratorRange<Statistics::TimerList::const_iterator>
Statistics::GetTimers() const
{
  return { Timers_.begin(), Timers_.end() };
}
 
util::Timer &
Statistics::AddTimer(std::string name)
{
  JLM_ASSERT(!HasTimer(name));
  Timers_.emplace_back(std::make_pair(std::move(name), util::Timer()));
  auto & timer = Timers_.back().second;
  return timer;
}
 
void
StatisticsCollector::PrintStatistics()
{
  if (NumCollectedStatistics() == 0)
    return;
 
  auto file = createOutputFile("statistics.log");
  file.open("w");
 
  for (auto & statistics : CollectedStatistics())
  {
    fprintf(file.fd(), "%s\n", statistics.Serialize(' ', ':').c_str());
  }
}
 
File
StatisticsCollector::createOutputFile(std::string fileNameSuffix, bool includeCount)
{
  JLM_ASSERT(Settings_.HasOutputDirectory());
 
  auto directory = Settings_.GetOrCreateOutputDirectory();
 
  // If the fileNameSuffix should have a count included, place it before the '.' (or at the end)
  if (includeCount)
  {
    size_t count = OutputFileCounter_[fileNameSuffix]++;
    auto firstDot = fileNameSuffix.find('.');
    if (firstDot == std::string::npos)
      firstDot = fileNameSuffix.size();
 
    fileNameSuffix =
        strfmt(fileNameSuffix.substr(0, firstDot), "-", count, fileNameSuffix.substr(firstDot));
  }
 
  std::string fileName;
  if (!Settings_.GetModuleName().empty())
    fileName += Settings_.GetModuleName() + "-";
  if (!Settings_.GetUniqueString().empty())
    fileName += Settings_.GetUniqueString() + "-";
  fileName += fileNameSuffix;
 
  auto fullPath = directory.Join(fileName);
  if (fullPath.Exists())
    throw Error("The generated output file name already exists: " + fullPath.to_str());
 
  return File(fullPath);
}
 
}