C++ PassManagerBuilder::populateLTOPassManager方法代码示例

/// Optimize merged modules using various IPO passes
bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
                                          bool DisableOpt,
                                          bool DisableInline,
                                          bool DisableGVNLoadPRE,
                                          bool DisableVectorization,
                                          std::string &errMsg) {
  if (!this->determineTarget(errMsg))
    return false;

  Module *mergedModule = IRLinker.getModule();

  // Mark which symbols can not be internalized
  this->applyScopeRestrictions();

  // Instantiate the pass manager to organize the passes.
  PassManager passes;

  // Add an appropriate DataLayout instance for this module...
  mergedModule->setDataLayout(TargetMach->getSubtargetImpl()->getDataLayout());

  Triple TargetTriple(TargetMach->getTargetTriple());
  PassManagerBuilder PMB;
  PMB.DisableGVNLoadPRE = DisableGVNLoadPRE;
  PMB.LoopVectorize = !DisableVectorization;
  PMB.SLPVectorize = !DisableVectorization;
  if (!DisableInline)
    PMB.Inliner = createFunctionInliningPass();
  PMB.LibraryInfo = new TargetLibraryInfo(TargetTriple);
  if (DisableOpt)
    PMB.OptLevel = 0;
  PMB.VerifyInput = true;
  PMB.VerifyOutput = true;

  PMB.populateLTOPassManager(passes, TargetMach);

  PassManager codeGenPasses;

  codeGenPasses.add(new DataLayoutPass());

  formatted_raw_ostream Out(out);

  // If the bitcode files contain ARC code and were compiled with optimization,
  // the ObjCARCContractPass must be run, so do it unconditionally here.
  codeGenPasses.add(createObjCARCContractPass());

  if (TargetMach->addPassesToEmitFile(codeGenPasses, Out,
                                      TargetMachine::CGFT_ObjectFile)) {
    errMsg = "target file type not supported";
    return false;
  }

  // Run our queue of passes all at once now, efficiently.
  passes.run(*mergedModule);

  // Run the code generator, and write assembly file
  codeGenPasses.run(*mergedModule);

  return true;
}

static void runLTOPasses(Module &M, TargetMachine &TM) {
  PassManager passes;
  PassManagerBuilder PMB;
  PMB.LibraryInfo = new TargetLibraryInfo(Triple(TM.getTargetTriple()));
  PMB.Inliner = createFunctionInliningPass();
  PMB.VerifyInput = true;
  PMB.VerifyOutput = true;
  PMB.populateLTOPassManager(passes, &TM);
  passes.run(M);
}

static void AddStandardLinkPasses(legacy::PassManagerBase &PM) {
  PassManagerBuilder Builder;
  Builder.VerifyInput = true;
  if (DisableOptimizations)
    Builder.OptLevel = 0;

  if (!DisableInline)
    Builder.Inliner = createFunctionInliningPass();
  Builder.populateLTOPassManager(PM);
}

static void AddStandardLinkPasses(PassManagerBase &PM) {
  PM.add(createVerifierPass());                  // Verify that input is correct

  // If the -strip-debug command line option was specified, do it.
  if (StripDebug)
    addPass(PM, createStripSymbolsPass(true));

  if (DisableOptimizations) return;

  PassManagerBuilder Builder;
  Builder.populateLTOPassManager(PM, /*Internalize=*/ !DisableInternalize,
                                 /*RunInliner=*/ !DisableInline);
}

/// Optimize merged modules using various IPO passes
bool LTOCodeGenerator::optimize(bool DisableVerify, bool DisableInline,
                                bool DisableGVNLoadPRE,
                                bool DisableVectorization) {
  if (!this->determineTarget())
    return false;

  auto DiagFileOrErr = lto::setupOptimizationRemarks(
      Context, LTORemarksFilename, LTOPassRemarksWithHotness);
  if (!DiagFileOrErr) {
    errs() << "Error: " << toString(DiagFileOrErr.takeError()) << "\n";
    report_fatal_error("Can't get an output file for the remarks");
  }
  DiagnosticOutputFile = std::move(*DiagFileOrErr);

  // We always run the verifier once on the merged module, the `DisableVerify`
  // parameter only applies to subsequent verify.
  verifyMergedModuleOnce();

  // Mark which symbols can not be internalized
  this->applyScopeRestrictions();

  // Instantiate the pass manager to organize the passes.
  legacy::PassManager passes;

  // Add an appropriate DataLayout instance for this module...
  MergedModule->setDataLayout(TargetMach->createDataLayout());

  passes.add(
      createTargetTransformInfoWrapperPass(TargetMach->getTargetIRAnalysis()));

  Triple TargetTriple(TargetMach->getTargetTriple());
  PassManagerBuilder PMB;
  PMB.DisableGVNLoadPRE = DisableGVNLoadPRE;
  PMB.LoopVectorize = !DisableVectorization;
  PMB.SLPVectorize = !DisableVectorization;
  if (!DisableInline)
    PMB.Inliner = createFunctionInliningPass();
  PMB.LibraryInfo = new TargetLibraryInfoImpl(TargetTriple);
  if (Freestanding)
    PMB.LibraryInfo->disableAllFunctions();
  PMB.OptLevel = OptLevel;
  PMB.VerifyInput = !DisableVerify;
  PMB.VerifyOutput = !DisableVerify;

  PMB.populateLTOPassManager(passes);

  // Run our queue of passes all at once now, efficiently.
  passes.run(*MergedModule);

  return true;
}

void LLVMPassManagerBuilderPopulateLTOPassManager(LLVMPassManagerBuilderRef PMB,
                                                  LLVMPassManagerRef PM,
                                                  LLVMBool Internalize,
                                                  LLVMBool RunInliner) {
  PassManagerBuilder *Builder = unwrap(PMB);
  legacy::PassManagerBase *LPM = unwrap(PM);

  // A small backwards compatibility hack. populateLTOPassManager used to take
  // an RunInliner option.
  if (RunInliner && !Builder->Inliner)
    Builder->Inliner = createFunctionInliningPass();

  Builder->populateLTOPassManager(*LPM);
}

static void runOldLtoPasses(Module &M, TargetMachine &TM) {
  // Note that the gold plugin has a similar piece of code, so
  // it is probably better to move this code to a common place.
  legacy::PassManager LtoPasses;
  LtoPasses.add(createTargetTransformInfoWrapperPass(TM.getTargetIRAnalysis()));
  PassManagerBuilder PMB;
  PMB.LibraryInfo = new TargetLibraryInfoImpl(Triple(TM.getTargetTriple()));
  PMB.Inliner = createFunctionInliningPass();
  PMB.VerifyInput = PMB.VerifyOutput = !Config->DisableVerify;
  PMB.LoopVectorize = true;
  PMB.SLPVectorize = true;
  PMB.OptLevel = Config->LtoO;
  PMB.populateLTOPassManager(LtoPasses);
  LtoPasses.run(M);
}

// Run LTO passes.
// Note that the gold plugin has a similar piece of code, so
// it is probably better to move this code to a common place.
static void runLTOPasses(Module &M, TargetMachine &TM) {
  legacy::PassManager LtoPasses;
  LtoPasses.add(createTargetTransformInfoWrapperPass(TM.getTargetIRAnalysis()));
  PassManagerBuilder PMB;
  PMB.LibraryInfo = new TargetLibraryInfoImpl(Triple(TM.getTargetTriple()));
  PMB.Inliner = createFunctionInliningPass();
  PMB.VerifyInput = PMB.VerifyOutput = !Config->DisableVerify;
  PMB.LoopVectorize = true;
  PMB.SLPVectorize = true;
  PMB.OptLevel = Config->LtoO;
  PMB.populateLTOPassManager(LtoPasses);
  LtoPasses.run(M);

  if (Config->SaveTemps)
    saveBCFile(M, ".lto.opt.bc");
}

static void runLTOPasses(Module &M, TargetMachine &TM) {
  if (const DataLayout *DL = TM.getDataLayout())
    M.setDataLayout(*DL);

  legacy::PassManager passes;
  passes.add(createTargetTransformInfoWrapperPass(TM.getTargetIRAnalysis()));

  PassManagerBuilder PMB;
  PMB.LibraryInfo = new TargetLibraryInfoImpl(Triple(TM.getTargetTriple()));
  PMB.Inliner = createFunctionInliningPass();
  PMB.VerifyInput = true;
  PMB.VerifyOutput = true;
  PMB.LoopVectorize = true;
  PMB.SLPVectorize = true;
  PMB.OptLevel = options::OptLevel;
  PMB.populateLTOPassManager(passes);
  passes.run(M);
}

// Generate current module to std::string
std::string* AndroidBitcodeLinker::GenerateBitcode() {
  std::string *BCString = new std::string;
  Module *M = linker->getModule();

  legacy::PassManager PM;
  raw_string_ostream Bitcode(*BCString);

  PM.add(createVerifierPass());

  if (!Config.isDisableOpt()) {
    PassManagerBuilder PMBuilder;
    PMBuilder.Inliner = createFunctionInliningPass();
    PMBuilder.populateLTOPassManager(PM);
  }

  // Doing clean up passes
  if (!Config.isDisableOpt())
  {
    PM.add(createInstructionCombiningPass());
    PM.add(createCFGSimplificationPass());
    PM.add(createAggressiveDCEPass());
    PM.add(createGlobalDCEPass());
  }

  // Make sure everything is still good
  PM.add(createVerifierPass());

  // Strip debug info and symbols.
  if (Config.isStripAll() || Config.isStripDebug())
    PM.add(createStripSymbolsPass(Config.isStripDebug() && !Config.isStripAll()));

  PM.add(createBitcodeWriterPass(Bitcode));
  PM.run(*M);
  Bitcode.flush();

  // Re-compute defined and undefined symbols
  UpdateSymbolList(M);

  delete M;
  delete linker;
  linker = 0;

  return BCString;
}

static void runLTOPasses(Module &M, TargetMachine &TM) {
  M.setDataLayout(TM.createDataLayout());

  legacy::PassManager passes;
  passes.add(createTargetTransformInfoWrapperPass(TM.getTargetIRAnalysis()));

  PassManagerBuilder PMB;
  PMB.LibraryInfo = new TargetLibraryInfoImpl(Triple(TM.getTargetTriple()));
  PMB.Inliner = createFunctionInliningPass();
  // Unconditionally verify input since it is not verified before this
  // point and has unknown origin.
  PMB.VerifyInput = true;
  PMB.VerifyOutput = !options::DisableVerify;
  PMB.LoopVectorize = true;
  PMB.SLPVectorize = true;
  PMB.OptLevel = options::OptLevel;
  PMB.populateLTOPassManager(passes);
  passes.run(M);
}

/// Optimize merged modules using various IPO passes
bool LTOCodeGenerator::optimize(bool DisableOpt,
                                bool DisableInline,
                                bool DisableGVNLoadPRE,
                                bool DisableVectorization,
                                std::string &errMsg) {
  if (!this->determineTarget(errMsg))
    return false;

  Module *mergedModule = IRLinker.getModule();

  // Mark which symbols can not be internalized
  this->applyScopeRestrictions();

  // Instantiate the pass manager to organize the passes.
  legacy::PassManager passes;

  // Add an appropriate DataLayout instance for this module...
  mergedModule->setDataLayout(*TargetMach->getDataLayout());

  passes.add(
      createTargetTransformInfoWrapperPass(TargetMach->getTargetIRAnalysis()));

  Triple TargetTriple(TargetMach->getTargetTriple());
  PassManagerBuilder PMB;
  PMB.DisableGVNLoadPRE = DisableGVNLoadPRE;
  PMB.LoopVectorize = !DisableVectorization;
  PMB.SLPVectorize = !DisableVectorization;
  if (!DisableInline)
    PMB.Inliner = createFunctionInliningPass();
  PMB.LibraryInfo = new TargetLibraryInfoImpl(TargetTriple);
  if (DisableOpt)
    PMB.OptLevel = 0;
  PMB.VerifyInput = true;
  PMB.VerifyOutput = true;

  PMB.populateLTOPassManager(passes);

  // Run our queue of passes all at once now, efficiently.
  passes.run(*mergedModule);

  return true;
}

/// Optimize merged modules using various IPO passes
bool LTOCodeGenerator::optimize(bool DisableVerify, bool DisableInline,
                                bool DisableGVNLoadPRE,
                                bool DisableVectorization) {
  if (!this->determineTarget())
    return false;

  // We always run the verifier once on the merged module, the `DisableVerify`
  // parameter only applies to subsequent verify.
  verifyMergedModuleOnce();

  // Mark which symbols can not be internalized
  this->applyScopeRestrictions();

  // Instantiate the pass manager to organize the passes.
  legacy::PassManager passes;

  // Add an appropriate DataLayout instance for this module...
  MergedModule->setDataLayout(TargetMach->createDataLayout());

  passes.add(
      createTargetTransformInfoWrapperPass(TargetMach->getTargetIRAnalysis()));

  Triple TargetTriple(TargetMach->getTargetTriple());
  PassManagerBuilder PMB;
  PMB.DisableGVNLoadPRE = DisableGVNLoadPRE;
  PMB.LoopVectorize = !DisableVectorization;
  PMB.SLPVectorize = !DisableVectorization;
  if (!DisableInline)
    PMB.Inliner = createFunctionInliningPass();
  PMB.LibraryInfo = new TargetLibraryInfoImpl(TargetTriple);
  PMB.OptLevel = OptLevel;
  PMB.VerifyInput = !DisableVerify;
  PMB.VerifyOutput = !DisableVerify;

  PMB.populateLTOPassManager(passes);

  // Run our queue of passes all at once now, efficiently.
  passes.run(*MergedModule);

  return true;
}

// main - Entry point for the sync compiler.
//
int main(int argc, char **argv) {
  sys::PrintStackTraceOnErrorSignal();

  PrettyStackTraceProgram X(argc, argv);

  // Enable debug stream buffering.
  EnableDebugBuffering = true;

  LLVMContext &Context = getGlobalContext();
  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.

  // Initialize target first, so that --version shows registered targets.
  LLVMInitializeVerilogBackendTarget();
  LLVMInitializeVerilogBackendTargetInfo();
  LLVMInitializeVerilogBackendTargetMC();

  cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
  
  SMDiagnostic Err;

  LuaScript *S = &scriptEngin();
  S->init();

  // Run the lua script.
  if (!S->runScriptFile(InputFilename, Err)){
    Err.print(argv[0], errs());
    return 1;
  }

  S->updateStatus();

  // Load the module to be compiled...
  std::auto_ptr<Module> M;

  M.reset(ParseIRFile(S->getValue<std::string>("InputFile"),
                      Err, Context));
  if (M.get() == 0) {
    Err.print(argv[0], errs());
    return 1;
  }
  Module &mod = *M.get();

  // TODO: Build the right triple.
  Triple TheTriple(mod.getTargetTriple());
  TargetOptions TO;
  std::auto_ptr<TargetMachine>
    target(TheVBackendTarget.createTargetMachine(TheTriple.getTriple(), "",
                                                 S->getDataLayout(), TO));

  // Build up all of the passes that we want to do to the module.
  PassManagerBuilder Builder;
  Builder.DisableUnrollLoops = true;
  Builder.LibraryInfo = new TargetLibraryInfo();
  Builder.LibraryInfo->disableAllFunctions();
  Builder.OptLevel = 3;
  Builder.SizeLevel = 2;
  Builder.DisableSimplifyLibCalls = true;
  Builder.Inliner = createHLSInlinerPass();
  Builder.addExtension(PassManagerBuilder::EP_LoopOptimizerEnd,
                       LoopOptimizerEndExtensionFn);
  PassManager Passes;
  Passes.add(new TargetData(*target->getTargetData()));

  // Add the immutable target-specific alias analysis ahead of all others AAs.
  Passes.add(createVAliasAnalysisPass(target->getIntrinsicInfo()));

  Passes.add(createVerifierPass());
  // This is the final bitcode, internalize it to expose more optimization
  // opportunities. Note that we should internalize it before SW/HW partition,
  // otherwise we may lost some information that help the later internalize.
  Passes.add(createInternalizePass(true));

  // Perform Software/Hardware partition.
  Passes.add(createFunctionFilterPass(S->getOutputStream("SoftwareIROutput")));
  Passes.add(createGlobalDCEPass());
  // Optimize the hardware part.
  //Builder.populateFunctionPassManager(*FPasses);
  Builder.populateModulePassManager(Passes);
  Builder.populateLTOPassManager(Passes,
                                 /*Internalize*/true,
                                 /*RunInliner*/true);

  //PM.add(createPrintModulePass(&dbgs()));
   
  // We do not use the stream that passing into addPassesToEmitFile.
  formatted_raw_ostream formatted_nulls(nulls());
  // Ask the target to add backend passes as necessary.
  target->addPassesToEmitFile(Passes, formatted_nulls,
                              TargetMachine::CGFT_Null,
                              false/*NoVerify*/);

  // Analyse the slack between registers.
  Passes.add(createCombPathDelayAnalysisPass());
  Passes.add(createVerilogASTWriterPass(S->getOutputStream("RTLOutput")));

  // Run some scripting passes.
  for (LuaScript::scriptpass_it I = S->passes_begin(), E = S->passes_end();
       I != E; ++I) {
//.........这里部分代码省略.........

int main(int argc, char **argv) {
#ifndef DEBUG_BUGPOINT
  llvm::sys::PrintStackTraceOnErrorSignal();
  llvm::PrettyStackTraceProgram X(argc, argv);
  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
#endif

  // Initialize passes
  PassRegistry &Registry = *PassRegistry::getPassRegistry();
  initializeCore(Registry);
  initializeScalarOpts(Registry);
  initializeObjCARCOpts(Registry);
  initializeVectorization(Registry);
  initializeIPO(Registry);
  initializeAnalysis(Registry);
  initializeIPA(Registry);
  initializeTransformUtils(Registry);
  initializeInstCombine(Registry);
  initializeInstrumentation(Registry);
  initializeTarget(Registry);

#ifdef LINK_POLLY_INTO_TOOLS
  polly::initializePollyPasses(Registry);
#endif

  cl::ParseCommandLineOptions(argc, argv,
                              "LLVM automatic testcase reducer. See\nhttp://"
                              "llvm.org/cmds/bugpoint.html"
                              " for more information.\n");
#ifndef DEBUG_BUGPOINT
  sys::SetInterruptFunction(BugpointInterruptFunction);
#endif

  LLVMContext& Context = getGlobalContext();
  // If we have an override, set it and then track the triple we want Modules
  // to use.
  if (!OverrideTriple.empty()) {
    TargetTriple.setTriple(Triple::normalize(OverrideTriple));
    outs() << "Override triple set to '" << TargetTriple.getTriple() << "'\n";
  }

  if (MemoryLimit < 0) {
    // Set the default MemoryLimit.  Be sure to update the flag's description if
    // you change this.
    if (sys::RunningOnValgrind() || UseValgrind)
      MemoryLimit = 800;
    else
      MemoryLimit = 400;
  }

  BugDriver D(argv[0], FindBugs, TimeoutValue, MemoryLimit,
              UseValgrind, Context);
  if (D.addSources(InputFilenames)) return 1;

  AddToDriver PM(D);

  if (StandardLinkOpts) {
    PassManagerBuilder Builder;
    Builder.Inliner = createFunctionInliningPass();
    Builder.populateLTOPassManager(PM);
  }

  if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
    PassManagerBuilder Builder;
    if (OptLevelO1)
      Builder.Inliner = createAlwaysInlinerPass();
    else if (OptLevelO2)
      Builder.Inliner = createFunctionInliningPass(225);
    else
      Builder.Inliner = createFunctionInliningPass(275);

    // Note that although clang/llvm-gcc use two separate passmanagers
    // here, it shouldn't normally make a difference.
    Builder.populateFunctionPassManager(PM);
    Builder.populateModulePassManager(PM);
  }

  for (std::vector<const PassInfo*>::iterator I = PassList.begin(),
         E = PassList.end();
       I != E; ++I) {
    const PassInfo* PI = *I;
    D.addPass(PI->getPassArgument());
  }

  // Bugpoint has the ability of generating a plethora of core files, so to
  // avoid filling up the disk, we prevent it
#ifndef DEBUG_BUGPOINT
  sys::Process::PreventCoreFiles();
#endif

  std::string Error;
  bool Failure = D.run(Error);
  if (!Error.empty()) {
    errs() << Error;
    return 1;
  }
  return Failure;
}