Exemplo n.º 1
0
int main(int argc, char **argv) {
  // Print a stack trace if we signal out.
  sys::PrintStackTraceOnErrorSignal(argv[0]);
  PrettyStackTraceProgram X(argc, argv);
  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.

  // Initialize targets and assembly printers/parsers.
  llvm::InitializeAllTargetInfos();
  llvm::InitializeAllTargetMCs();
  llvm::InitializeAllAsmParsers();
  llvm::InitializeAllDisassemblers();

  // Register the target printer for --version.
  cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);

  cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n");
  MCTargetOptions MCOptions = InitMCTargetOptionsFromFlags();
  TripleName = Triple::normalize(TripleName);
  setDwarfDebugFlags(argc, argv);

  setDwarfDebugProducer();

  const char *ProgName = argv[0];
  const Target *TheTarget = GetTarget(ProgName);
  if (!TheTarget)
    return 1;
  // Now that GetTarget() has (potentially) replaced TripleName, it's safe to
  // construct the Triple object.
  Triple TheTriple(TripleName);

  ErrorOr<std::unique_ptr<MemoryBuffer>> BufferPtr =
      MemoryBuffer::getFileOrSTDIN(InputFilename);
  if (std::error_code EC = BufferPtr.getError()) {
    errs() << InputFilename << ": " << EC.message() << '\n';
    return 1;
  }
  MemoryBuffer *Buffer = BufferPtr->get();

  SourceMgr SrcMgr;

  // Tell SrcMgr about this buffer, which is what the parser will pick up.
  SrcMgr.AddNewSourceBuffer(std::move(*BufferPtr), SMLoc());

  // Record the location of the include directories so that the lexer can find
  // it later.
  SrcMgr.setIncludeDirs(IncludeDirs);

  std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
  assert(MRI && "Unable to create target register info!");

  std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
  assert(MAI && "Unable to create target asm info!");

  MAI->setRelaxELFRelocations(RelaxELFRel);

  if (CompressDebugSections != DebugCompressionType::DCT_None) {
    if (!zlib::isAvailable()) {
      errs() << ProgName
             << ": build tools with zlib to enable -compress-debug-sections";
      return 1;
    }
    MAI->setCompressDebugSections(CompressDebugSections);
  }

  // FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and
  // MCObjectFileInfo needs a MCContext reference in order to initialize itself.
  MCObjectFileInfo MOFI;
  MCContext Ctx(MAI.get(), MRI.get(), &MOFI, &SrcMgr);
  MOFI.InitMCObjectFileInfo(TheTriple, PIC, CMModel, Ctx);

  if (SaveTempLabels)
    Ctx.setAllowTemporaryLabels(false);

  Ctx.setGenDwarfForAssembly(GenDwarfForAssembly);
  // Default to 4 for dwarf version.
  unsigned DwarfVersion = MCOptions.DwarfVersion ? MCOptions.DwarfVersion : 4;
  if (DwarfVersion < 2 || DwarfVersion > 4) {
    errs() << ProgName << ": Dwarf version " << DwarfVersion
           << " is not supported." << '\n';
    return 1;
  }
  Ctx.setDwarfVersion(DwarfVersion);
  if (!DwarfDebugFlags.empty())
    Ctx.setDwarfDebugFlags(StringRef(DwarfDebugFlags));
  if (!DwarfDebugProducer.empty())
    Ctx.setDwarfDebugProducer(StringRef(DwarfDebugProducer));
  if (!DebugCompilationDir.empty())
    Ctx.setCompilationDir(DebugCompilationDir);
  else {
    // If no compilation dir is set, try to use the current directory.
    SmallString<128> CWD;
    if (!sys::fs::current_path(CWD))
      Ctx.setCompilationDir(CWD);
  }
  if (!MainFileName.empty())
    Ctx.setMainFileName(MainFileName);

  // Package up features to be passed to target/subtarget
  std::string FeaturesStr;
  if (MAttrs.size()) {
    SubtargetFeatures Features;
    for (unsigned i = 0; i != MAttrs.size(); ++i)
      Features.AddFeature(MAttrs[i]);
    FeaturesStr = Features.getString();
  }

  std::unique_ptr<tool_output_file> Out = GetOutputStream();
  if (!Out)
    return 1;

  std::unique_ptr<buffer_ostream> BOS;
  raw_pwrite_stream *OS = &Out->os();
  std::unique_ptr<MCStreamer> Str;

  std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());
  std::unique_ptr<MCSubtargetInfo> STI(
      TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr));

  MCInstPrinter *IP = nullptr;
  if (FileType == OFT_AssemblyFile) {
    IP = TheTarget->createMCInstPrinter(Triple(TripleName), OutputAsmVariant,
                                        *MAI, *MCII, *MRI);

    // Set the display preference for hex vs. decimal immediates.
    IP->setPrintImmHex(PrintImmHex);

    // Set up the AsmStreamer.
    MCCodeEmitter *CE = nullptr;
    MCAsmBackend *MAB = nullptr;
    if (ShowEncoding) {
      CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx);
      MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, MCPU);
    }
    auto FOut = llvm::make_unique<formatted_raw_ostream>(*OS);
    Str.reset(TheTarget->createAsmStreamer(
        Ctx, std::move(FOut), /*asmverbose*/ true,
        /*useDwarfDirectory*/ true, IP, CE, MAB, ShowInst));

  } else if (FileType == OFT_Null) {
    Str.reset(TheTarget->createNullStreamer(Ctx));
  } else {
    assert(FileType == OFT_ObjectFile && "Invalid file type!");

    // Don't waste memory on names of temp labels.
    Ctx.setUseNamesOnTempLabels(false);

    if (!Out->os().supportsSeeking()) {
      BOS = make_unique<buffer_ostream>(Out->os());
      OS = BOS.get();
    }

    MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx);
    MCAsmBackend *MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, MCPU);
    Str.reset(TheTarget->createMCObjectStreamer(
        TheTriple, Ctx, *MAB, *OS, CE, *STI, MCOptions.MCRelaxAll,
        MCOptions.MCIncrementalLinkerCompatible,
        /*DWARFMustBeAtTheEnd*/ false));
    if (NoExecStack)
      Str->InitSections(true);
  }

  int Res = 1;
  bool disassemble = false;
  switch (Action) {
  case AC_AsLex:
    Res = AsLexInput(SrcMgr, *MAI, Out->os());
    break;
  case AC_Assemble:
    Res = AssembleInput(ProgName, TheTarget, SrcMgr, Ctx, *Str, *MAI, *STI,
                        *MCII, MCOptions);
    break;
  case AC_MDisassemble:
    assert(IP && "Expected assembly output");
    IP->setUseMarkup(1);
    disassemble = true;
    break;
  case AC_Disassemble:
    disassemble = true;
    break;
  }
  if (disassemble)
    Res = Disassembler::disassemble(*TheTarget, TripleName, *STI, *Str,
                                    *Buffer, SrcMgr, Out->os());

  // Keep output if no errors.
  if (Res == 0) Out->keep();
  return Res;
}
Exemplo n.º 2
0
int main(int argc, char **argv) {
  InitLLVM X(argc, argv);

  // Initialize targets and assembly parsers.
  InitializeAllTargetInfos();
  InitializeAllTargetMCs();
  InitializeAllAsmParsers();

  // Enable printing of available targets when flag --version is specified.
  cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);

  cl::HideUnrelatedOptions({&ToolOptions, &ViewOptions});

  // Parse flags and initialize target options.
  cl::ParseCommandLineOptions(argc, argv,
                              "llvm machine code performance analyzer.\n");

  // Get the target from the triple. If a triple is not specified, then select
  // the default triple for the host. If the triple doesn't correspond to any
  // registered target, then exit with an error message.
  const char *ProgName = argv[0];
  const Target *TheTarget = getTarget(ProgName);
  if (!TheTarget)
    return 1;

  // GetTarget() may replaced TripleName with a default triple.
  // For safety, reconstruct the Triple object.
  Triple TheTriple(TripleName);

  ErrorOr<std::unique_ptr<MemoryBuffer>> BufferPtr =
      MemoryBuffer::getFileOrSTDIN(InputFilename);
  if (std::error_code EC = BufferPtr.getError()) {
    WithColor::error() << InputFilename << ": " << EC.message() << '\n';
    return 1;
  }

  // Apply overrides to llvm-mca specific options.
  processViewOptions();

  SourceMgr SrcMgr;

  // Tell SrcMgr about this buffer, which is what the parser will pick up.
  SrcMgr.AddNewSourceBuffer(std::move(*BufferPtr), SMLoc());

  std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
  assert(MRI && "Unable to create target register info!");

  std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
  assert(MAI && "Unable to create target asm info!");

  MCObjectFileInfo MOFI;
  MCContext Ctx(MAI.get(), MRI.get(), &MOFI, &SrcMgr);
  MOFI.InitMCObjectFileInfo(TheTriple, /* PIC= */ false, Ctx);

  std::unique_ptr<buffer_ostream> BOS;

  std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());

  std::unique_ptr<MCInstrAnalysis> MCIA(
      TheTarget->createMCInstrAnalysis(MCII.get()));

  if (!MCPU.compare("native"))
    MCPU = llvm::sys::getHostCPUName();

  std::unique_ptr<MCSubtargetInfo> STI(
      TheTarget->createMCSubtargetInfo(TripleName, MCPU, /* FeaturesStr */ ""));
  if (!STI->isCPUStringValid(MCPU))
    return 1;

  if (!PrintInstructionTables && !STI->getSchedModel().isOutOfOrder()) {
    WithColor::error() << "please specify an out-of-order cpu. '" << MCPU
                       << "' is an in-order cpu.\n";
    return 1;
  }

  if (!STI->getSchedModel().hasInstrSchedModel()) {
    WithColor::error()
        << "unable to find instruction-level scheduling information for"
        << " target triple '" << TheTriple.normalize() << "' and cpu '" << MCPU
        << "'.\n";

    if (STI->getSchedModel().InstrItineraries)
      WithColor::note()
          << "cpu '" << MCPU << "' provides itineraries. However, "
          << "instruction itineraries are currently unsupported.\n";
    return 1;
  }

  // Parse the input and create CodeRegions that llvm-mca can analyze.
  mca::AsmCodeRegionGenerator CRG(*TheTarget, SrcMgr, Ctx, *MAI, *STI, *MCII);
  Expected<const mca::CodeRegions &> RegionsOrErr = CRG.parseCodeRegions();
  if (!RegionsOrErr) {
    if (auto Err =
            handleErrors(RegionsOrErr.takeError(), [](const StringError &E) {
              WithColor::error() << E.getMessage() << '\n';
            })) {
      // Default case.
      WithColor::error() << toString(std::move(Err)) << '\n';
    }
    return 1;
  }
  const mca::CodeRegions &Regions = *RegionsOrErr;
  if (Regions.empty()) {
    WithColor::error() << "no assembly instructions found.\n";
    return 1;
  }

  // Now initialize the output file.
  auto OF = getOutputStream();
  if (std::error_code EC = OF.getError()) {
    WithColor::error() << EC.message() << '\n';
    return 1;
  }

  unsigned AssemblerDialect = CRG.getAssemblerDialect();
  if (OutputAsmVariant >= 0)
    AssemblerDialect = static_cast<unsigned>(OutputAsmVariant);
  std::unique_ptr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
      Triple(TripleName), AssemblerDialect, *MAI, *MCII, *MRI));
  if (!IP) {
    WithColor::error()
        << "unable to create instruction printer for target triple '"
        << TheTriple.normalize() << "' with assembly variant "
        << AssemblerDialect << ".\n";
    return 1;
  }

  std::unique_ptr<ToolOutputFile> TOF = std::move(*OF);

  const MCSchedModel &SM = STI->getSchedModel();

  // Create an instruction builder.
  mca::InstrBuilder IB(*STI, *MCII, *MRI, MCIA.get());

  // Create a context to control ownership of the pipeline hardware.
  mca::Context MCA(*MRI, *STI);

  mca::PipelineOptions PO(MicroOpQueue, DecoderThroughput, DispatchWidth,
                          RegisterFileSize, LoadQueueSize, StoreQueueSize,
                          AssumeNoAlias, EnableBottleneckAnalysis);

  // Number each region in the sequence.
  unsigned RegionIdx = 0;

  for (const std::unique_ptr<mca::CodeRegion> &Region : Regions) {
    // Skip empty code regions.
    if (Region->empty())
      continue;

    // Don't print the header of this region if it is the default region, and
    // it doesn't have an end location.
    if (Region->startLoc().isValid() || Region->endLoc().isValid()) {
      TOF->os() << "\n[" << RegionIdx++ << "] Code Region";
      StringRef Desc = Region->getDescription();
      if (!Desc.empty())
        TOF->os() << " - " << Desc;
      TOF->os() << "\n\n";
    }

    // Lower the MCInst sequence into an mca::Instruction sequence.
    ArrayRef<MCInst> Insts = Region->getInstructions();
    std::vector<std::unique_ptr<mca::Instruction>> LoweredSequence;
    for (const MCInst &MCI : Insts) {
      Expected<std::unique_ptr<mca::Instruction>> Inst =
          IB.createInstruction(MCI);
      if (!Inst) {
        if (auto NewE = handleErrors(
                Inst.takeError(),
                [&IP, &STI](const mca::InstructionError<MCInst> &IE) {
                  std::string InstructionStr;
                  raw_string_ostream SS(InstructionStr);
                  WithColor::error() << IE.Message << '\n';
                  IP->printInst(&IE.Inst, SS, "", *STI);
                  SS.flush();
                  WithColor::note() << "instruction: " << InstructionStr
                                    << '\n';
                })) {
          // Default case.
          WithColor::error() << toString(std::move(NewE));
        }
        return 1;
      }

      LoweredSequence.emplace_back(std::move(Inst.get()));
    }

    mca::SourceMgr S(LoweredSequence, PrintInstructionTables ? 1 : Iterations);

    if (PrintInstructionTables) {
      //  Create a pipeline, stages, and a printer.
      auto P = llvm::make_unique<mca::Pipeline>();
      P->appendStage(llvm::make_unique<mca::EntryStage>(S));
      P->appendStage(llvm::make_unique<mca::InstructionTables>(SM));
      mca::PipelinePrinter Printer(*P);

      // Create the views for this pipeline, execute, and emit a report.
      if (PrintInstructionInfoView) {
        Printer.addView(llvm::make_unique<mca::InstructionInfoView>(
            *STI, *MCII, Insts, *IP));
      }
      Printer.addView(
          llvm::make_unique<mca::ResourcePressureView>(*STI, *IP, Insts));

      if (!runPipeline(*P))
        return 1;

      Printer.printReport(TOF->os());
      continue;
    }

    // Create a basic pipeline simulating an out-of-order backend.
    auto P = MCA.createDefaultPipeline(PO, IB, S);
    mca::PipelinePrinter Printer(*P);

    if (PrintSummaryView)
      Printer.addView(llvm::make_unique<mca::SummaryView>(
          SM, Insts, DispatchWidth));

    if (EnableBottleneckAnalysis)
      Printer.addView(llvm::make_unique<mca::BottleneckAnalysis>(SM));

    if (PrintInstructionInfoView)
      Printer.addView(
          llvm::make_unique<mca::InstructionInfoView>(*STI, *MCII, Insts, *IP));

    if (PrintDispatchStats)
      Printer.addView(llvm::make_unique<mca::DispatchStatistics>());

    if (PrintSchedulerStats)
      Printer.addView(llvm::make_unique<mca::SchedulerStatistics>(*STI));

    if (PrintRetireStats)
      Printer.addView(llvm::make_unique<mca::RetireControlUnitStatistics>(SM));

    if (PrintRegisterFileStats)
      Printer.addView(llvm::make_unique<mca::RegisterFileStatistics>(*STI));

    if (PrintResourcePressureView)
      Printer.addView(
          llvm::make_unique<mca::ResourcePressureView>(*STI, *IP, Insts));

    if (PrintTimelineView) {
      unsigned TimelineIterations =
          TimelineMaxIterations ? TimelineMaxIterations : 10;
      Printer.addView(llvm::make_unique<mca::TimelineView>(
          *STI, *IP, Insts, std::min(TimelineIterations, S.getNumIterations()),
          TimelineMaxCycles));
    }

    if (!runPipeline(*P))
      return 1;

    Printer.printReport(TOF->os());

    // Clear the InstrBuilder internal state in preparation for another round.
    IB.clear();
  }

  TOF->keep();
  return 0;
}
Exemplo n.º 3
0
int AssembleOneInput(const uint8_t *Data, size_t Size) {
  const bool ShowInst = false;
  const bool AsmVerbose = false;
  const bool UseDwarfDirectory = true;

  Triple TheTriple(Triple::normalize(TripleName));

  SourceMgr SrcMgr;

  std::unique_ptr<MemoryBuffer> BufferPtr(new LLVMFuzzerInputBuffer(Data, Size));

  // Tell SrcMgr about this buffer, which is what the parser will pick up.
  SrcMgr.AddNewSourceBuffer(std::move(BufferPtr), SMLoc());

  static const std::vector<std::string> NoIncludeDirs;
  SrcMgr.setIncludeDirs(NoIncludeDirs);

  static std::string ArchName;
  std::string Error;
  const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple,
      Error);
  if (!TheTarget) {
    errs() << "error: this target '" << TheTriple.normalize()
      << "/" << ArchName << "', was not found: '" << Error << "'\n";

    abort();
  }

  std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
  if (!MRI) {
    errs() << "Unable to create target register info!";
    abort();
  }

  std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
  if (!MAI) {
    errs() << "Unable to create target asm info!";
    abort();
  }


  MCObjectFileInfo MOFI;
  MCContext Ctx(MAI.get(), MRI.get(), &MOFI, &SrcMgr);

  static const bool UsePIC = false;
  MOFI.InitMCObjectFileInfo(TheTriple, UsePIC, Ctx);

  const unsigned OutputAsmVariant = 0;
  std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());
  MCInstPrinter *IP = TheTarget->createMCInstPrinter(Triple(TripleName), OutputAsmVariant,
      *MAI, *MCII, *MRI);
  if (!IP) {
    errs()
      << "error: unable to create instruction printer for target triple '"
      << TheTriple.normalize() << "' with assembly variant "
      << OutputAsmVariant << ".\n";

    abort();
  }

  const char *ProgName = "llvm-mc-fuzzer";
  std::unique_ptr<MCSubtargetInfo> STI(
      TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr));
  MCCodeEmitter *CE = nullptr;
  MCAsmBackend *MAB = nullptr;

  MCTargetOptions MCOptions = InitMCTargetOptionsFromFlags();

  std::string OutputString;
  raw_string_ostream Out(OutputString);
  auto FOut = llvm::make_unique<formatted_raw_ostream>(Out);

  std::unique_ptr<MCStreamer> Str;

  if (FileType == OFT_AssemblyFile) {
    Str.reset(TheTarget->createAsmStreamer(
        Ctx,  std::move(FOut), AsmVerbose,
        UseDwarfDirectory, IP, CE, MAB, ShowInst));
  } else {
    assert(FileType == OFT_ObjectFile && "Invalid file type!");

    std::error_code EC;
    const std::string OutputFilename = "-";
    auto Out =
        llvm::make_unique<ToolOutputFile>(OutputFilename, EC, sys::fs::F_None);
    if (EC) {
      errs() << EC.message() << '\n';
      abort();
    }

    // Don't waste memory on names of temp labels.
    Ctx.setUseNamesOnTempLabels(false);

    std::unique_ptr<buffer_ostream> BOS;
    raw_pwrite_stream *OS = &Out->os();
    if (!Out->os().supportsSeeking()) {
      BOS = make_unique<buffer_ostream>(Out->os());
      OS = BOS.get();
    }

    MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx);
    MCAsmBackend *MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, MCPU,
                                                      MCOptions);
    Str.reset(TheTarget->createMCObjectStreamer(
        TheTriple, Ctx, *MAB, *OS, CE, *STI, MCOptions.MCRelaxAll,
        MCOptions.MCIncrementalLinkerCompatible,
        /*DWARFMustBeAtTheEnd*/ false));
  }
  const int Res = AssembleInput(ProgName, TheTarget, SrcMgr, Ctx, *Str, *MAI, *STI,
      *MCII, MCOptions);

  (void) Res;

  return 0;
}
Exemplo n.º 4
0
IRObjectFile::IRObjectFile(MemoryBufferRef Object, std::unique_ptr<Module> Mod)
    : SymbolicFile(Binary::ID_IR, Object), M(std::move(Mod)) {
  Mang.reset(new Mangler());

  const std::string &InlineAsm = M->getModuleInlineAsm();
  if (InlineAsm.empty())
    return;

  Triple TT(M->getTargetTriple());
  std::string Err;
  const Target *T = TargetRegistry::lookupTarget(TT.str(), Err);
  if (!T)
    return;

  std::unique_ptr<MCRegisterInfo> MRI(T->createMCRegInfo(TT.str()));
  if (!MRI)
    return;

  std::unique_ptr<MCAsmInfo> MAI(T->createMCAsmInfo(*MRI, TT.str()));
  if (!MAI)
    return;

  std::unique_ptr<MCSubtargetInfo> STI(
      T->createMCSubtargetInfo(TT.str(), "", ""));
  if (!STI)
    return;

  std::unique_ptr<MCInstrInfo> MCII(T->createMCInstrInfo());
  if (!MCII)
    return;

  MCObjectFileInfo MOFI;
  MCContext MCCtx(MAI.get(), MRI.get(), &MOFI);
  MOFI.InitMCObjectFileInfo(TT, Reloc::Default, CodeModel::Default, MCCtx);
  std::unique_ptr<RecordStreamer> Streamer(new RecordStreamer(MCCtx));
  T->createNullTargetStreamer(*Streamer);

  std::unique_ptr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer(InlineAsm));
  SourceMgr SrcMgr;
  SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
  std::unique_ptr<MCAsmParser> Parser(
      createMCAsmParser(SrcMgr, MCCtx, *Streamer, *MAI));

  MCTargetOptions MCOptions;
  std::unique_ptr<MCTargetAsmParser> TAP(
      T->createMCAsmParser(*STI, *Parser, *MCII, MCOptions));
  if (!TAP)
    return;

  Parser->setTargetParser(*TAP);
  if (Parser->Run(false))
    return;

  for (auto &KV : *Streamer) {
    StringRef Key = KV.first();
    RecordStreamer::State Value = KV.second;
    uint32_t Res = BasicSymbolRef::SF_None;
    switch (Value) {
    case RecordStreamer::NeverSeen:
      llvm_unreachable("foo");
    case RecordStreamer::DefinedGlobal:
      Res |= BasicSymbolRef::SF_Global;
      break;
    case RecordStreamer::Defined:
      break;
    case RecordStreamer::Global:
    case RecordStreamer::Used:
      Res |= BasicSymbolRef::SF_Undefined;
      Res |= BasicSymbolRef::SF_Global;
      break;
    }
    AsmSymbols.push_back(
        std::make_pair<std::string, uint32_t>(Key, std::move(Res)));
  }
}
Exemplo n.º 5
0
// Parse inline ASM and collect the list of symbols that are not defined in
// the current module. This is inspired from IRObjectFile.
void IRObjectFile::CollectAsmUndefinedRefs(
    const Triple &TT, StringRef InlineAsm,
    function_ref<void(StringRef, BasicSymbolRef::Flags)> AsmUndefinedRefs) {
  if (InlineAsm.empty())
    return;

  std::string Err;
  const Target *T = TargetRegistry::lookupTarget(TT.str(), Err);
  if (!T)
    return;

  std::unique_ptr<MCRegisterInfo> MRI(T->createMCRegInfo(TT.str()));
  if (!MRI)
    return;

  std::unique_ptr<MCAsmInfo> MAI(T->createMCAsmInfo(*MRI, TT.str()));
  if (!MAI)
    return;

  std::unique_ptr<MCSubtargetInfo> STI(
      T->createMCSubtargetInfo(TT.str(), "", ""));
  if (!STI)
    return;

  std::unique_ptr<MCInstrInfo> MCII(T->createMCInstrInfo());
  if (!MCII)
    return;

  MCObjectFileInfo MOFI;
  MCContext MCCtx(MAI.get(), MRI.get(), &MOFI);
  MOFI.InitMCObjectFileInfo(TT, /*PIC*/ false, CodeModel::Default, MCCtx);
  std::unique_ptr<RecordStreamer> Streamer(new RecordStreamer(MCCtx));
  T->createNullTargetStreamer(*Streamer);

  std::unique_ptr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer(InlineAsm));
  SourceMgr SrcMgr;
  SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
  std::unique_ptr<MCAsmParser> Parser(
      createMCAsmParser(SrcMgr, MCCtx, *Streamer, *MAI));

  MCTargetOptions MCOptions;
  std::unique_ptr<MCTargetAsmParser> TAP(
      T->createMCAsmParser(*STI, *Parser, *MCII, MCOptions));
  if (!TAP)
    return;

  Parser->setTargetParser(*TAP);
  if (Parser->Run(false))
    return;

  for (auto &KV : *Streamer) {
    StringRef Key = KV.first();
    RecordStreamer::State Value = KV.second;
    uint32_t Res = BasicSymbolRef::SF_None;
    switch (Value) {
    case RecordStreamer::NeverSeen:
      llvm_unreachable("NeverSeen should have been replaced earlier");
    case RecordStreamer::DefinedGlobal:
      Res |= BasicSymbolRef::SF_Global;
      break;
    case RecordStreamer::Defined:
      break;
    case RecordStreamer::Global:
    case RecordStreamer::Used:
      Res |= BasicSymbolRef::SF_Undefined;
      Res |= BasicSymbolRef::SF_Global;
      break;
    case RecordStreamer::DefinedWeak:
      Res |= BasicSymbolRef::SF_Weak;
      Res |= BasicSymbolRef::SF_Global;
      break;
    case RecordStreamer::UndefinedWeak:
      Res |= BasicSymbolRef::SF_Weak;
      Res |= BasicSymbolRef::SF_Undefined;
    }
    AsmUndefinedRefs(Key, BasicSymbolRef::Flags(Res));
  }
}
Exemplo n.º 6
0
int main(int argc, char **argv) {

  ParseCommandLineOptions(argc, argv, "merge split dwarf (.dwo) files");

  llvm::InitializeAllTargetInfos();
  llvm::InitializeAllTargetMCs();
  llvm::InitializeAllTargets();
  llvm::InitializeAllAsmPrinters();

  std::string ErrorStr;
  StringRef Context = "dwarf streamer init";

  Triple TheTriple("x86_64-linux-gnu");

  // Get the target.
  const Target *TheTarget =
      TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
  if (!TheTarget)
    return error(ErrorStr, Context);
  std::string TripleName = TheTriple.getTriple();

  // Create all the MC Objects.
  std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
  if (!MRI)
    return error(Twine("no register info for target ") + TripleName, Context);

  std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
  if (!MAI)
    return error("no asm info for target " + TripleName, Context);

  MCObjectFileInfo MOFI;
  MCContext MC(MAI.get(), MRI.get(), &MOFI);
  MOFI.InitMCObjectFileInfo(TheTriple, Reloc::Default, CodeModel::Default, MC);

  auto MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, "");
  if (!MAB)
    return error("no asm backend for target " + TripleName, Context);

  std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());
  if (!MII)
    return error("no instr info info for target " + TripleName, Context);

  std::unique_ptr<MCSubtargetInfo> MSTI(
      TheTarget->createMCSubtargetInfo(TripleName, "", ""));
  if (!MSTI)
    return error("no subtarget info for target " + TripleName, Context);

  MCCodeEmitter *MCE = TheTarget->createMCCodeEmitter(*MII, *MRI, MC);
  if (!MCE)
    return error("no code emitter for target " + TripleName, Context);

  // Create the output file.
  std::error_code EC;
  raw_fd_ostream OutFile(OutputFilename, EC, sys::fs::F_None);
  if (EC)
    return error(Twine(OutputFilename) + ": " + EC.message(), Context);

  MCTargetOptions MCOptions = InitMCTargetOptionsFromFlags();
  std::unique_ptr<MCStreamer> MS(TheTarget->createMCObjectStreamer(
      TheTriple, MC, *MAB, OutFile, MCE, *MSTI, MCOptions.MCRelaxAll,
      MCOptions.MCIncrementalLinkerCompatible,
      /*DWARFMustBeAtTheEnd*/ false));
  if (!MS)
    return error("no object streamer for target " + TripleName, Context);

  if (auto Err = write(*MS, InputFiles))
    return error(Err.message(), "Writing DWP file");

  MS->Finish();
}
Exemplo n.º 7
0
void ModuleSymbolTable::CollectAsmSymbols(
    const Module &M,
    function_ref<void(StringRef, BasicSymbolRef::Flags)> AsmSymbol) {
  StringRef InlineAsm = M.getModuleInlineAsm();
  if (InlineAsm.empty())
    return;

  std::string Err;
  const Triple TT(M.getTargetTriple());
  const Target *T = TargetRegistry::lookupTarget(TT.str(), Err);
  assert(T && T->hasMCAsmParser());

  std::unique_ptr<MCRegisterInfo> MRI(T->createMCRegInfo(TT.str()));
  if (!MRI)
    return;

  std::unique_ptr<MCAsmInfo> MAI(T->createMCAsmInfo(*MRI, TT.str()));
  if (!MAI)
    return;

  std::unique_ptr<MCSubtargetInfo> STI(
      T->createMCSubtargetInfo(TT.str(), "", ""));
  if (!STI)
    return;

  std::unique_ptr<MCInstrInfo> MCII(T->createMCInstrInfo());
  if (!MCII)
    return;

  MCObjectFileInfo MOFI;
  MCContext MCCtx(MAI.get(), MRI.get(), &MOFI);
  MOFI.InitMCObjectFileInfo(TT, /*PIC*/ false, MCCtx);
  RecordStreamer Streamer(MCCtx, M);
  T->createNullTargetStreamer(Streamer);

  std::unique_ptr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer(InlineAsm));
  SourceMgr SrcMgr;
  SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
  std::unique_ptr<MCAsmParser> Parser(
      createMCAsmParser(SrcMgr, MCCtx, Streamer, *MAI));

  MCTargetOptions MCOptions;
  std::unique_ptr<MCTargetAsmParser> TAP(
      T->createMCAsmParser(*STI, *Parser, *MCII, MCOptions));
  if (!TAP)
    return;

  Parser->setTargetParser(*TAP);
  if (Parser->Run(false))
    return;

  Streamer.flushSymverDirectives();

  for (auto &KV : Streamer) {
    StringRef Key = KV.first();
    RecordStreamer::State Value = KV.second;
    // FIXME: For now we just assume that all asm symbols are executable.
    uint32_t Res = BasicSymbolRef::SF_Executable;
    switch (Value) {
    case RecordStreamer::NeverSeen:
      llvm_unreachable("NeverSeen should have been replaced earlier");
    case RecordStreamer::DefinedGlobal:
      Res |= BasicSymbolRef::SF_Global;
      break;
    case RecordStreamer::Defined:
      break;
    case RecordStreamer::Global:
    case RecordStreamer::Used:
      Res |= BasicSymbolRef::SF_Undefined;
      Res |= BasicSymbolRef::SF_Global;
      break;
    case RecordStreamer::DefinedWeak:
      Res |= BasicSymbolRef::SF_Weak;
      Res |= BasicSymbolRef::SF_Global;
      break;
    case RecordStreamer::UndefinedWeak:
      Res |= BasicSymbolRef::SF_Weak;
      Res |= BasicSymbolRef::SF_Undefined;
    }
    AsmSymbol(Key, BasicSymbolRef::Flags(Res));
  }
}
Exemplo n.º 8
0
int main(int ac, char **av)
{
    SourceMgr SrcMgr;

    //LLVMInitializeX86TargetInfo();
    llvm::InitializeAllTargetInfos();
    //LLVMInitializeX86AsmParser();
    llvm::InitializeAllTargetMCs();
    //LLVMInitializeX86TargetMC();
    llvm::InitializeAllAsmParsers();
    //LLVMInitializeX86AsmParser();
    llvm::InitializeAllDisassemblers();
    //LLVMInitializeX86Disassembler();

    // arg0:
    // llvm::Target encapsulating the "x86_64-apple-darwin14.5.0" information 

    // see /lib/Support/Triple.cpp for the details
    //spec = llvm::sys::getDefaultTargetTriple();
    //std::string machSpec = "x86_64-apple-windows"; // will produce a COFF
    //std::string machSpec = "x86_64-apple-darwin14.5.0"; // will produce a Mach-O
    std::string machSpec = "arm-none-none-eabi"; //
    //std::string machSpec = "x86_64-apple-darwin";
    //std::string machSpec = "x86_64-thumb-linux-gnu";
    //std::string machSpec = "x86_64-unknown-linux-gnu";
    printf("machine spec: %s\n", machSpec.c_str());
    machSpec = Triple::normalize(machSpec);
    printf("machine spec (normalized): %s\n", machSpec.c_str());
    Triple TheTriple(machSpec);

    // Get the target specific parser.
    std::string Error;
    const Target *TheTarget = TargetRegistry::lookupTarget(/*arch*/"", TheTriple, Error);
    if (!TheTarget) {
        errs() << Error;
        return -1;
    }

    machSpec = TheTriple.getTriple();
    printf("machine spec (returned): %s\n", machSpec.c_str());
    
    printf("Target.getName(): %s\n", TheTarget->getName());
    printf("Target.getShortDescription(): %s\n", TheTarget->getShortDescription());

    /* from the target we get almost everything */
    std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(machSpec));
    std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, machSpec));
    std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo()); /* describes target instruction set */
    MCSubtargetInfo *STI = TheTarget->createMCSubtargetInfo(machSpec, "", ""); /* subtarget instr set */
    MCAsmBackend *MAB = TheTarget->createMCAsmBackend(*MRI, machSpec, /* specific CPU */ "");

    // arg0:
    // llvm::SourceMgr (Support/SourceMgr.h) that holds assembler source
    // has vector of llvm::SrcBuffer encaps (Support/MemoryBuffer.h) and vector of include dirs
    //std::string asmSrc = ".org 0x100, 0xAA\nfoo:\nxor %eax, %ebx\npush %rbp\njmp foo\nrdtsc\n";
	//std::string asmSrc = ".text\n" "ldr pc, data_foo\n" "\n" "data_foo:\n" "    .int 0x8\n" "\n" "loop:\n" "b loop\n";
	//std::string asmSrc = ".text\n" "mov r2, r1\n";
	std::string asmSrc = ".text\n" "ldr pc, data_foo\n" "data_foo:\n" ".int 0x8\n" "loop:\n" "b loop\n";

    std::unique_ptr<MemoryBuffer> memBuf = MemoryBuffer::getMemBuffer(asmSrc);
    SrcMgr.AddNewSourceBuffer(std::move(memBuf), SMLoc());

    // arg1: the machine code context
    MCObjectFileInfo MOFI;
    MCContext Ctx(MAI.get(), MRI.get(), &MOFI, &SrcMgr);
    MOFI.InitMCObjectFileInfo(TheTriple, Reloc::Default, CodeModel::Default, Ctx);

    // this is the assembler interface
    // -methods per .s statements (emit bytes, handle directive, etc.)
    // -remembers current section
    // -implementations that write a .s, or .o in various formats
    //
    //   1. the output stream ... a formatted_raw_ostream wraps a raw_ostream to provide
    //   tracking of line and column position for padding and shit
    //
    //   but raw_ostream is abstract and is implemented by raw_fd_ostream, raw_string_ostream, etc.

	/* output stream:
		raw_svector_ostream is a raw_pwrite_stream is a raw_ostream
		since a SmallString is SmallVector (svector) we can use this and 
		retrieve bytes later with its .data() method */
	SmallString<1024> smallString;
    raw_svector_ostream rso(smallString);

    /* code emitter needs 1) instruction set info 2) register info */
    MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, Ctx);

    MCStreamer *as = TheTarget->createMCObjectStreamer(
		TheTriple, /* Triple */	
        Ctx, /* the MCContext */
        *MAB,  /* the AsmBackend, (fixups, relaxation, objs and elfs) */
        rso, /* output stream raw_pwrite_stream */
        CE, /* code emitter */
		*STI, /* subtarget info */
		true, /* relax all fixups */
		true, /* incremental linker compatible */ 
        false /* DWARFMustBeAtTheEnd */
    );

    std::string abi = "none";
    MCTargetOptions toptions;
    toptions.MCUseDwarfDirectory = false;
    toptions.ABIName = abi;

    printf("trying to assemble, let's go..\n");
    AssembleInput(TheTarget, SrcMgr, Ctx, *as, *MAI, *STI,
        *MCII, toptions);
	printf("done with AssembleInput()\n");

	/* dump to file for debugging */
	FILE *fp;
	fp = fopen("out.bin", "wb");
	fwrite(smallString.data(), 1, smallString.size(), fp);
	fclose(fp);

	//int n = smallString.size();
	int codeOffset=0, codeSize = 0;
	char *data = smallString.data();
	if(*(uint32_t *)data == 0xFEEDFACF) {
		unsigned int idx = 0;
		idx += 0x20; /* skip mach_header_64 to first command */
		idx += 0x48; /* advance into segment_command_64 to first section */
		idx += 0x28; /* advance into section_64 to size */
		uint64_t scn_size = *(uint64_t *)(data + idx);
		idx += 0x8; /* advance into section_64 to offset */
		uint64_t scn_offset = *(uint64_t *)(data + idx);
		codeOffset = scn_offset;
		codeSize = scn_size;
	}
	else if(0==memcmp(data, "\x7F" "ELF\x01\x01\x01\x00", 8)) {
		/* assume four sections: NULL, .strtab, .text, .symtab */
		uint32_t e_shoff = *(uint32_t *)(data + 0x20);
		uint32_t sh_offset = *(uint32_t *)(data + e_shoff + 2*0x28 + 0x10); /* second shdr */
		uint32_t sh_size = *(uint32_t *)(data + e_shoff + 2*0x28 + 0x14); /* second shdr */
		codeOffset = sh_offset;
		codeSize = sh_size;
	}
	else {
		printf("ERROR: couldn't identify type of output file\n");
	}
	
	dump_bytes((unsigned char *)data + codeOffset, codeSize, 0);

    return 0;
}
Exemplo n.º 9
0
int main(int argc, char **argv) {
  InitLLVM X(argc, argv);

  // Initialize targets and assembly parsers.
  llvm::InitializeAllTargetInfos();
  llvm::InitializeAllTargetMCs();
  llvm::InitializeAllAsmParsers();

  // Enable printing of available targets when flag --version is specified.
  cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);

  cl::HideUnrelatedOptions({&ToolOptions, &ViewOptions});

  // Parse flags and initialize target options.
  cl::ParseCommandLineOptions(argc, argv,
                              "llvm machine code performance analyzer.\n");

  MCTargetOptions MCOptions;
  MCOptions.PreserveAsmComments = false;

  // Get the target from the triple. If a triple is not specified, then select
  // the default triple for the host. If the triple doesn't correspond to any
  // registered target, then exit with an error message.
  const char *ProgName = argv[0];
  const Target *TheTarget = getTarget(ProgName);
  if (!TheTarget)
    return 1;

  // GetTarget() may replaced TripleName with a default triple.
  // For safety, reconstruct the Triple object.
  Triple TheTriple(TripleName);

  ErrorOr<std::unique_ptr<MemoryBuffer>> BufferPtr =
      MemoryBuffer::getFileOrSTDIN(InputFilename);
  if (std::error_code EC = BufferPtr.getError()) {
    WithColor::error() << InputFilename << ": " << EC.message() << '\n';
    return 1;
  }

  // Apply overrides to llvm-mca specific options.
  processViewOptions();

  SourceMgr SrcMgr;

  // Tell SrcMgr about this buffer, which is what the parser will pick up.
  SrcMgr.AddNewSourceBuffer(std::move(*BufferPtr), SMLoc());

  std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
  assert(MRI && "Unable to create target register info!");

  std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
  assert(MAI && "Unable to create target asm info!");

  MCObjectFileInfo MOFI;
  MCContext Ctx(MAI.get(), MRI.get(), &MOFI, &SrcMgr);
  MOFI.InitMCObjectFileInfo(TheTriple, /* PIC= */ false, Ctx);

  std::unique_ptr<buffer_ostream> BOS;

  mca::CodeRegions Regions(SrcMgr);
  MCStreamerWrapper Str(Ctx, Regions);

  std::unique_ptr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());

  std::unique_ptr<MCInstrAnalysis> MCIA(
      TheTarget->createMCInstrAnalysis(MCII.get()));

  if (!MCPU.compare("native"))
    MCPU = llvm::sys::getHostCPUName();

  std::unique_ptr<MCSubtargetInfo> STI(
      TheTarget->createMCSubtargetInfo(TripleName, MCPU, /* FeaturesStr */ ""));
  if (!STI->isCPUStringValid(MCPU))
    return 1;

  if (!PrintInstructionTables && !STI->getSchedModel().isOutOfOrder()) {
    WithColor::error() << "please specify an out-of-order cpu. '" << MCPU
                       << "' is an in-order cpu.\n";
    return 1;
  }

  if (!STI->getSchedModel().hasInstrSchedModel()) {
    WithColor::error()
        << "unable to find instruction-level scheduling information for"
        << " target triple '" << TheTriple.normalize() << "' and cpu '" << MCPU
        << "'.\n";

    if (STI->getSchedModel().InstrItineraries)
      WithColor::note()
          << "cpu '" << MCPU << "' provides itineraries. However, "
          << "instruction itineraries are currently unsupported.\n";
    return 1;
  }

  std::unique_ptr<MCAsmParser> P(createMCAsmParser(SrcMgr, Ctx, Str, *MAI));
  MCAsmLexer &Lexer = P->getLexer();
  MCACommentConsumer CC(Regions);
  Lexer.setCommentConsumer(&CC);

  if (AssembleInput(ProgName, *P, TheTarget, *STI, *MCII, MCOptions))
    return 1;

  if (Regions.empty()) {
    WithColor::error() << "no assembly instructions found.\n";
    return 1;
  }

  // Now initialize the output file.
  auto OF = getOutputStream();
  if (std::error_code EC = OF.getError()) {
    WithColor::error() << EC.message() << '\n';
    return 1;
  }

  unsigned AssemblerDialect = P->getAssemblerDialect();
  if (OutputAsmVariant >= 0)
    AssemblerDialect = static_cast<unsigned>(OutputAsmVariant);
  std::unique_ptr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
      Triple(TripleName), AssemblerDialect, *MAI, *MCII, *MRI));
  if (!IP) {
    WithColor::error()
        << "unable to create instruction printer for target triple '"
        << TheTriple.normalize() << "' with assembly variant "
        << AssemblerDialect << ".\n";
    return 1;
  }

  std::unique_ptr<llvm::ToolOutputFile> TOF = std::move(*OF);

  const MCSchedModel &SM = STI->getSchedModel();

  unsigned Width = SM.IssueWidth;
  if (DispatchWidth)
    Width = DispatchWidth;

  // Create an instruction builder.
  mca::InstrBuilder IB(*STI, *MCII, *MRI, *MCIA, *IP);

  // Create a context to control ownership of the pipeline hardware.
  mca::Context MCA(*MRI, *STI);

  mca::PipelineOptions PO(Width, RegisterFileSize, LoadQueueSize,
                          StoreQueueSize, AssumeNoAlias);

  // Number each region in the sequence.
  unsigned RegionIdx = 0;
  for (const std::unique_ptr<mca::CodeRegion> &Region : Regions) {
    // Skip empty code regions.
    if (Region->empty())
      continue;

    // Don't print the header of this region if it is the default region, and
    // it doesn't have an end location.
    if (Region->startLoc().isValid() || Region->endLoc().isValid()) {
      TOF->os() << "\n[" << RegionIdx++ << "] Code Region";
      StringRef Desc = Region->getDescription();
      if (!Desc.empty())
        TOF->os() << " - " << Desc;
      TOF->os() << "\n\n";
    }

    mca::SourceMgr S(Region->getInstructions(),
                     PrintInstructionTables ? 1 : Iterations);

    if (PrintInstructionTables) {
      //  Create a pipeline, stages, and a printer.
      auto P = llvm::make_unique<mca::Pipeline>();
      P->appendStage(llvm::make_unique<mca::FetchStage>(IB, S));
      P->appendStage(llvm::make_unique<mca::InstructionTables>(SM, IB));
      mca::PipelinePrinter Printer(*P);

      // Create the views for this pipeline, execute, and emit a report.
      if (PrintInstructionInfoView) {
        Printer.addView(
            llvm::make_unique<mca::InstructionInfoView>(*STI, *MCII, S, *IP));
      }
      Printer.addView(
          llvm::make_unique<mca::ResourcePressureView>(*STI, *IP, S));
      P->run();
      Printer.printReport(TOF->os());
      continue;
    }

    // Create a basic pipeline simulating an out-of-order backend.
    auto P = MCA.createDefaultPipeline(PO, IB, S);
    mca::PipelinePrinter Printer(*P);

    if (PrintSummaryView)
      Printer.addView(llvm::make_unique<mca::SummaryView>(SM, S, Width));

    if (PrintInstructionInfoView)
      Printer.addView(
          llvm::make_unique<mca::InstructionInfoView>(*STI, *MCII, S, *IP));

    if (PrintDispatchStats)
      Printer.addView(llvm::make_unique<mca::DispatchStatistics>());

    if (PrintSchedulerStats)
      Printer.addView(llvm::make_unique<mca::SchedulerStatistics>(*STI));

    if (PrintRetireStats)
      Printer.addView(llvm::make_unique<mca::RetireControlUnitStatistics>());

    if (PrintRegisterFileStats)
      Printer.addView(llvm::make_unique<mca::RegisterFileStatistics>(*STI));

    if (PrintResourcePressureView)
      Printer.addView(
          llvm::make_unique<mca::ResourcePressureView>(*STI, *IP, S));

    if (PrintTimelineView) {
      Printer.addView(llvm::make_unique<mca::TimelineView>(
          *STI, *IP, S, TimelineMaxIterations, TimelineMaxCycles));
    }

    P->run();
    Printer.printReport(TOF->os());

    // Clear the InstrBuilder internal state in preparation for another round.
    IB.clear();
  }

  TOF->keep();
  return 0;
}