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authorpatrick <patrick@openbsd.org>2020-08-03 15:06:44 +0000
committerpatrick <patrick@openbsd.org>2020-08-03 15:06:44 +0000
commitb64793999546ed8adebaeebd9d8345d18db8927d (patch)
tree4357c27b561d73b0e089727c6ed659f2ceff5f47 /gnu/llvm/lib/Support/Statistic.cpp
parentAdd support for UTF-8 DISPLAY-HINTs with octet length. For now only (diff)
downloadwireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.tar.xz
wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.zip
Remove LLVM 8.0.1 files.
Diffstat (limited to 'gnu/llvm/lib/Support/Statistic.cpp')
-rw-r--r--gnu/llvm/lib/Support/Statistic.cpp268
1 files changed, 0 insertions, 268 deletions
diff --git a/gnu/llvm/lib/Support/Statistic.cpp b/gnu/llvm/lib/Support/Statistic.cpp
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--- a/gnu/llvm/lib/Support/Statistic.cpp
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-//===-- Statistic.cpp - Easy way to expose stats information --------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file 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/ADT/StringExtras.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Compiler.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/Format.h"
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/Mutex.h"
-#include "llvm/Support/Timer.h"
-#include "llvm/Support/YAMLTraits.h"
-#include "llvm/Support/raw_ostream.h"
-#include <algorithm>
-#include <cstring>
-using namespace llvm;
-
-/// -stats - Command line option to cause transformations to emit stats about
-/// what they did.
-///
-static cl::opt<bool> Stats(
- "stats",
- cl::desc("Enable statistics output from program (available with Asserts)"),
- cl::Hidden);
-
-static cl::opt<bool> StatsAsJSON("stats-json",
- cl::desc("Display statistics as json data"),
- cl::Hidden);
-
-static bool Enabled;
-static bool PrintOnExit;
-
-namespace {
-/// 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.
-/// This class is also used to look up statistic values from applications that
-/// use LLVM.
-class StatisticInfo {
- std::vector<Statistic*> Stats;
-
- friend void llvm::PrintStatistics();
- friend void llvm::PrintStatistics(raw_ostream &OS);
- friend void llvm::PrintStatisticsJSON(raw_ostream &OS);
-
- /// Sort statistics by debugtype,name,description.
- void sort();
-public:
- using const_iterator = std::vector<Statistic *>::const_iterator;
-
- StatisticInfo();
- ~StatisticInfo();
-
- void addStatistic(Statistic *S) {
- Stats.push_back(S);
- }
-
- const_iterator begin() const { return Stats.begin(); }
- const_iterator end() const { return Stats.end(); }
- iterator_range<const_iterator> statistics() const {
- return {begin(), end()};
- }
-
- void reset();
-};
-} // end anonymous namespace
-
-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.
- // llvm_shutdown calls destructors while holding the ManagedStatic mutex.
- // These destructors end up calling PrintStatistics, which takes StatLock.
- // Since dereferencing StatInfo and StatLock can require taking the
- // ManagedStatic mutex, doing so with StatLock held would lead to a lock
- // order inversion. To avoid that, we dereference the ManagedStatics first,
- // and only take StatLock afterwards.
- if (!Initialized.load(std::memory_order_relaxed)) {
- sys::SmartMutex<true> &Lock = *StatLock;
- StatisticInfo &SI = *StatInfo;
- sys::SmartScopedLock<true> Writer(Lock);
- // Check Initialized again after acquiring the lock.
- if (Initialized.load(std::memory_order_relaxed))
- return;
- if (Stats || Enabled)
- SI.addStatistic(this);
-
- // Remember we have been registered.
- Initialized.store(true, std::memory_order_release);
- }
-}
-
-StatisticInfo::StatisticInfo() {
- // Ensure timergroup lists are created first so they are destructed after us.
- TimerGroup::ConstructTimerLists();
-}
-
-// Print information when destroyed, iff command line option is specified.
-StatisticInfo::~StatisticInfo() {
- if (::Stats || PrintOnExit)
- llvm::PrintStatistics();
-}
-
-void llvm::EnableStatistics(bool PrintOnExit) {
- Enabled = true;
- ::PrintOnExit = PrintOnExit;
-}
-
-bool llvm::AreStatisticsEnabled() {
- return Enabled || Stats;
-}
-
-void StatisticInfo::sort() {
- std::stable_sort(Stats.begin(), Stats.end(),
- [](const Statistic *LHS, const Statistic *RHS) {
- if (int Cmp = std::strcmp(LHS->getDebugType(), RHS->getDebugType()))
- return Cmp < 0;
-
- if (int Cmp = std::strcmp(LHS->getName(), RHS->getName()))
- return Cmp < 0;
-
- return std::strcmp(LHS->getDesc(), RHS->getDesc()) < 0;
- });
-}
-
-void StatisticInfo::reset() {
- sys::SmartScopedLock<true> Writer(*StatLock);
-
- // Tell each statistic that it isn't registered so it has to register
- // again. We're holding the lock so it won't be able to do so until we're
- // finished. Once we've forced it to re-register (after we return), then zero
- // the value.
- for (auto *Stat : Stats) {
- // Value updates to a statistic that complete before this statement in the
- // iteration for that statistic will be lost as intended.
- Stat->Initialized = false;
- Stat->Value = 0;
- }
-
- // Clear the registration list and release the lock once we're done. Any
- // pending updates from other threads will safely take effect after we return.
- // That might not be what the user wants if they're measuring a compilation
- // but it's their responsibility to prevent concurrent compilations to make
- // a single compilation measurable.
- Stats.clear();
-}
-
-void llvm::PrintStatistics(raw_ostream &OS) {
- StatisticInfo &Stats = *StatInfo;
-
- // Figure out how long the biggest Value and Name fields are.
- unsigned MaxDebugTypeLen = 0, MaxValLen = 0;
- for (size_t i = 0, e = Stats.Stats.size(); i != e; ++i) {
- MaxValLen = std::max(MaxValLen,
- (unsigned)utostr(Stats.Stats[i]->getValue()).size());
- MaxDebugTypeLen = std::max(MaxDebugTypeLen,
- (unsigned)std::strlen(Stats.Stats[i]->getDebugType()));
- }
-
- Stats.sort();
-
- // Print out the statistics header...
- 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.Stats.size(); i != e; ++i)
- OS << format("%*u %-*s - %s\n",
- MaxValLen, Stats.Stats[i]->getValue(),
- MaxDebugTypeLen, Stats.Stats[i]->getDebugType(),
- Stats.Stats[i]->getDesc());
-
- OS << '\n'; // Flush the output stream.
- OS.flush();
-}
-
-void llvm::PrintStatisticsJSON(raw_ostream &OS) {
- sys::SmartScopedLock<true> Reader(*StatLock);
- StatisticInfo &Stats = *StatInfo;
-
- Stats.sort();
-
- // Print all of the statistics.
- OS << "{\n";
- const char *delim = "";
- for (const Statistic *Stat : Stats.Stats) {
- OS << delim;
- assert(yaml::needsQuotes(Stat->getDebugType()) == yaml::QuotingType::None &&
- "Statistic group/type name is simple.");
- assert(yaml::needsQuotes(Stat->getName()) == yaml::QuotingType::None &&
- "Statistic name is simple");
- OS << "\t\"" << Stat->getDebugType() << '.' << Stat->getName() << "\": "
- << Stat->getValue();
- delim = ",\n";
- }
- // Print timers.
- TimerGroup::printAllJSONValues(OS, delim);
-
- OS << "\n}\n";
- OS.flush();
-}
-
-void llvm::PrintStatistics() {
-#if LLVM_ENABLE_STATS
- sys::SmartScopedLock<true> Reader(*StatLock);
- StatisticInfo &Stats = *StatInfo;
-
- // Statistics not enabled?
- if (Stats.Stats.empty()) return;
-
- // Get the stream to write to.
- std::unique_ptr<raw_ostream> OutStream = CreateInfoOutputFile();
- if (StatsAsJSON)
- PrintStatisticsJSON(*OutStream);
- else
- PrintStatistics(*OutStream);
-
-#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 (Stats) {
- // Get the stream to write to.
- std::unique_ptr<raw_ostream> OutStream = CreateInfoOutputFile();
- (*OutStream) << "Statistics are disabled. "
- << "Build with asserts or with -DLLVM_ENABLE_STATS\n";
- }
-#endif
-}
-
-const std::vector<std::pair<StringRef, unsigned>> llvm::GetStatistics() {
- sys::SmartScopedLock<true> Reader(*StatLock);
- std::vector<std::pair<StringRef, unsigned>> ReturnStats;
-
- for (const auto &Stat : StatInfo->statistics())
- ReturnStats.emplace_back(Stat->getName(), Stat->getValue());
- return ReturnStats;
-}
-
-void llvm::ResetStatistics() {
- StatInfo->reset();
-}