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

void AMDGPUTargetMachine::adjustPassManager(PassManagerBuilder &Builder) {
  Builder.DivergentTarget = true;

  bool EnableOpt = getOptLevel() > CodeGenOpt::None;
  bool Internalize = InternalizeSymbols;
  bool EarlyInline = EarlyInlineAll && EnableOpt && !EnableFunctionCalls;
  bool AMDGPUAA = EnableAMDGPUAliasAnalysis && EnableOpt;
  bool LibCallSimplify = EnableLibCallSimplify && EnableOpt;

  if (EnableFunctionCalls) {
    delete Builder.Inliner;
    Builder.Inliner = createAMDGPUFunctionInliningPass();
  }

  Builder.addExtension(
    PassManagerBuilder::EP_ModuleOptimizerEarly,
    [Internalize, EarlyInline, AMDGPUAA](const PassManagerBuilder &,
                                         legacy::PassManagerBase &PM) {
      if (AMDGPUAA) {
        PM.add(createAMDGPUAAWrapperPass());
        PM.add(createAMDGPUExternalAAWrapperPass());
      }
      PM.add(createAMDGPUUnifyMetadataPass());
      if (Internalize) {
        PM.add(createInternalizePass(mustPreserveGV));
        PM.add(createGlobalDCEPass());
      }
      if (EarlyInline)
        PM.add(createAMDGPUAlwaysInlinePass(false));
  });

  const auto &Opt = Options;
  Builder.addExtension(
    PassManagerBuilder::EP_EarlyAsPossible,
    [AMDGPUAA, LibCallSimplify, &Opt](const PassManagerBuilder &,
                                      legacy::PassManagerBase &PM) {
      if (AMDGPUAA) {
        PM.add(createAMDGPUAAWrapperPass());
        PM.add(createAMDGPUExternalAAWrapperPass());
      }
      PM.add(llvm::createAMDGPUUseNativeCallsPass());
      if (LibCallSimplify)
        PM.add(llvm::createAMDGPUSimplifyLibCallsPass(Opt));
  });

  Builder.addExtension(
    PassManagerBuilder::EP_CGSCCOptimizerLate,
    [](const PassManagerBuilder &, legacy::PassManagerBase &PM) {
      // Add infer address spaces pass to the opt pipeline after inlining
      // but before SROA to increase SROA opportunities.
      PM.add(createInferAddressSpacesPass());

      // This should run after inlining to have any chance of doing anything,
      // and before other cleanup optimizations.
      PM.add(createAMDGPULowerKernelAttributesPass());
  });
}

void llvm::addCoroutinePassesToExtensionPoints(PassManagerBuilder &Builder) {
  Builder.addExtension(PassManagerBuilder::EP_EarlyAsPossible,
                       addCoroutineEarlyPasses);
  Builder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                       addCoroutineOpt0Passes);
  Builder.addExtension(PassManagerBuilder::EP_CGSCCOptimizerLate,
                       addCoroutineSCCPasses);
  Builder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate,
                       addCoroutineScalarOptimizerPasses);
  Builder.addExtension(PassManagerBuilder::EP_OptimizerLast,
                       addCoroutineOptimizerLastPasses);
}

/**
 * Adds a set of optimization passes to the given module/function pass
 * managers based on the given optimization and size reduction levels.
 *
 * The selection mirrors Clang behavior and is based on LLVM's
 * PassManagerBuilder.
 */
static void addOptimizationPasses(PassManagerBase &mpm, FunctionPassManager &fpm,
                                  unsigned optLevel, unsigned sizeLevel) {
    fpm.add(createVerifierPass());                  // Verify that input is correct

    PassManagerBuilder builder;
    builder.OptLevel = optLevel;
    builder.SizeLevel = sizeLevel;

    if (willInline()) {
        unsigned threshold = 225;
        if (sizeLevel == 1)      // -Os
            threshold = 75;
        else if (sizeLevel == 2) // -Oz
            threshold = 25;
        if (optLevel > 2)
            threshold = 275;
        builder.Inliner = createFunctionInliningPass(threshold);
    } else {
        builder.Inliner = createAlwaysInlinerPass();
    }
    builder.DisableSimplifyLibCalls = disableSimplifyLibCalls;
    builder.DisableUnitAtATime = !unitAtATime;
    builder.DisableUnrollLoops = optLevel == 0;
    /* builder.Vectorize is set in ctor from command line switch */

    if (!disableLangSpecificPasses) {
        if (!disableSimplifyDruntimeCalls)
            builder.addExtension(PassManagerBuilder::EP_LoopOptimizerEnd, addSimplifyDRuntimeCallsPass);

#if USE_METADATA
        if (!disableGCToStack)
            builder.addExtension(PassManagerBuilder::EP_LoopOptimizerEnd, addGarbageCollect2StackPass);
#endif // USE_METADATA
    }

#if LDC_LLVM_VER >= 301
    // EP_OptimizerLast does not exist in LLVM 3.0, add it manually below.
    builder.addExtension(PassManagerBuilder::EP_OptimizerLast, addStripExternalsPass);
#endif

    builder.populateFunctionPassManager(fpm);
    builder.populateModulePassManager(mpm);

#if LDC_LLVM_VER < 301
    addStripExternalsPass(builder, mpm);
#endif
}

void NVPTXTargetMachine::adjustPassManager(PassManagerBuilder &Builder) {
  Builder.addExtension(
    PassManagerBuilder::EP_EarlyAsPossible,
    [&](const PassManagerBuilder &, legacy::PassManagerBase &PM) {
      PM.add(createNVVMReflectPass());
      PM.add(createNVVMIntrRangePass(Subtarget.getSmVersion()));
    });
}

void LLVMZigOptimizeModule(LLVMTargetMachineRef targ_machine_ref, LLVMModuleRef module_ref) {
    TargetMachine* target_machine = reinterpret_cast<TargetMachine*>(targ_machine_ref);
    Module* module = unwrap(module_ref);
    TargetLibraryInfoImpl tlii(Triple(module->getTargetTriple()));

    PassManagerBuilder *PMBuilder = new PassManagerBuilder();
    PMBuilder->OptLevel = target_machine->getOptLevel();
    PMBuilder->SizeLevel = 0;
    PMBuilder->BBVectorize = true;
    PMBuilder->SLPVectorize = true;
    PMBuilder->LoopVectorize = true;

    PMBuilder->DisableUnitAtATime = false;
    PMBuilder->DisableUnrollLoops = false;
    PMBuilder->MergeFunctions = true;
    PMBuilder->PrepareForLTO = true;
    PMBuilder->RerollLoops = true;

    PMBuilder->addExtension(PassManagerBuilder::EP_EarlyAsPossible, addAddDiscriminatorsPass);

    PMBuilder->LibraryInfo = &tlii;

    PMBuilder->Inliner = createFunctionInliningPass(PMBuilder->OptLevel, PMBuilder->SizeLevel);

    // Set up the per-function pass manager.
    legacy::FunctionPassManager *FPM = new legacy::FunctionPassManager(module);
    FPM->add(createTargetTransformInfoWrapperPass(target_machine->getTargetIRAnalysis()));
#ifndef NDEBUG
    bool verify_module = true;
#else
    bool verify_module = false;
#endif
    if (verify_module) {
        FPM->add(createVerifierPass());
    }
    PMBuilder->populateFunctionPassManager(*FPM);

    // Set up the per-module pass manager.
    legacy::PassManager *MPM = new legacy::PassManager();
    MPM->add(createTargetTransformInfoWrapperPass(target_machine->getTargetIRAnalysis()));

    PMBuilder->populateModulePassManager(*MPM);


    // run per function optimization passes
    FPM->doInitialization();
    for (Function &F : *module)
      if (!F.isDeclaration())
        FPM->run(F);
    FPM->doFinalization();

    // run per module optimization passes
    MPM->run(*module);
}

/// This routine adds optimization passes based on selected optimization level,
/// OptLevel.
///
/// OptLevel - Optimization Level
static void AddOptimizationPasses(legacy::PassManagerBase &MPM,
                                  legacy::FunctionPassManager &FPM,
                                  TargetMachine *TM, unsigned OptLevel,
                                  unsigned SizeLevel) {
  if (!NoVerify || VerifyEach)
    FPM.add(createVerifierPass()); // Verify that input is correct

  PassManagerBuilder Builder;
  Builder.OptLevel = OptLevel;
  Builder.SizeLevel = SizeLevel;

  if (DisableInline) {
    // No inlining pass
  } else if (OptLevel > 1) {
    Builder.Inliner = createFunctionInliningPass(OptLevel, SizeLevel);
  } else {
    Builder.Inliner = createAlwaysInlinerLegacyPass();
  }
  Builder.DisableUnitAtATime = !UnitAtATime;
  Builder.DisableUnrollLoops = (DisableLoopUnrolling.getNumOccurrences() > 0) ?
                               DisableLoopUnrolling : OptLevel == 0;

  // This is final, unless there is a #pragma vectorize enable
  if (DisableLoopVectorization)
    Builder.LoopVectorize = false;
  // If option wasn't forced via cmd line (-vectorize-loops, -loop-vectorize)
  else if (!Builder.LoopVectorize)
    Builder.LoopVectorize = OptLevel > 1 && SizeLevel < 2;

  // When #pragma vectorize is on for SLP, do the same as above
  Builder.SLPVectorize =
      DisableSLPVectorization ? false : OptLevel > 1 && SizeLevel < 2;

  // Add target-specific passes that need to run as early as possible.
  if (TM)
    Builder.addExtension(
        PassManagerBuilder::EP_EarlyAsPossible,
        [&](const PassManagerBuilder &, legacy::PassManagerBase &PM) {
          TM->addEarlyAsPossiblePasses(PM);
        });

  if (Coroutines)
    addCoroutinePassesToExtensionPoints(Builder);

  Builder.populateFunctionPassManager(FPM);
  Builder.populateModulePassManager(MPM);
}

// 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.........

void swift::performLLVMOptimizations(IRGenOptions &Opts, llvm::Module *Module,
                                     llvm::TargetMachine *TargetMachine) {
  SharedTimer timer("LLVM optimization");

  // Set up a pipeline.
  PassManagerBuilder PMBuilder;

  if (Opts.Optimize && !Opts.DisableLLVMOptzns) {
    PMBuilder.OptLevel = 3;
    PMBuilder.Inliner = llvm::createFunctionInliningPass(200);
    PMBuilder.SLPVectorize = true;
    PMBuilder.LoopVectorize = true;
    PMBuilder.MergeFunctions = true;
  } else {
    PMBuilder.OptLevel = 0;
    if (!Opts.DisableLLVMOptzns)
      PMBuilder.Inliner =
        llvm::createAlwaysInlinerPass(/*insertlifetime*/false);
  }

  PMBuilder.addExtension(PassManagerBuilder::EP_ModuleOptimizerEarly,
                         addSwiftStackPromotionPass);

  // If the optimizer is enabled, we run the ARCOpt pass in the scalar optimizer
  // and the Contract pass as late as possible.
  if (!Opts.DisableLLVMARCOpts) {
    PMBuilder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate,
                           addSwiftARCOptPass);
    PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
                           addSwiftContractPass);
  }

  if (Opts.Sanitize == SanitizerKind::Address) {
    PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
                           addAddressSanitizerPasses);
    PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                           addAddressSanitizerPasses);
  }
  
  if (Opts.Sanitize == SanitizerKind::Thread) {
    PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
                           addThreadSanitizerPass);
    PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                           addThreadSanitizerPass);
  }

  // Configure the function passes.
  legacy::FunctionPassManager FunctionPasses(Module);
  FunctionPasses.add(createTargetTransformInfoWrapperPass(
      TargetMachine->getTargetIRAnalysis()));
  if (Opts.Verify)
    FunctionPasses.add(createVerifierPass());
  PMBuilder.populateFunctionPassManager(FunctionPasses);

  // The PMBuilder only knows about LLVM AA passes.  We should explicitly add
  // the swift AA pass after the other ones.
  if (!Opts.DisableLLVMARCOpts) {
    FunctionPasses.add(createSwiftAAWrapperPass());
    FunctionPasses.add(createExternalAAWrapperPass([](Pass &P, Function &,
                                                      AAResults &AAR) {
      if (auto *WrapperPass = P.getAnalysisIfAvailable<SwiftAAWrapperPass>())
        AAR.addAAResult(WrapperPass->getResult());
    }));
  }

  // Run the function passes.
  FunctionPasses.doInitialization();
  for (auto I = Module->begin(), E = Module->end(); I != E; ++I)
    if (!I->isDeclaration())
      FunctionPasses.run(*I);
  FunctionPasses.doFinalization();

  // Configure the module passes.
  legacy::PassManager ModulePasses;
  ModulePasses.add(createTargetTransformInfoWrapperPass(
      TargetMachine->getTargetIRAnalysis()));
  PMBuilder.populateModulePassManager(ModulePasses);

  // The PMBuilder only knows about LLVM AA passes.  We should explicitly add
  // the swift AA pass after the other ones.
  if (!Opts.DisableLLVMARCOpts) {
    ModulePasses.add(createSwiftAAWrapperPass());
    ModulePasses.add(createExternalAAWrapperPass([](Pass &P, Function &,
                                                    AAResults &AAR) {
      if (auto *WrapperPass = P.getAnalysisIfAvailable<SwiftAAWrapperPass>())
        AAR.addAAResult(WrapperPass->getResult());
    }));
  }

  // If we're generating a profile, add the lowering pass now.
  if (Opts.GenerateProfile)
    ModulePasses.add(createInstrProfilingPass());

  if (Opts.Verify)
    ModulePasses.add(createVerifierPass());

  if (Opts.PrintInlineTree)
    ModulePasses.add(createInlineTreePrinterPass());

  // Do it.
//.........这里部分代码省略.........

void EmitAssemblyHelper::CreatePasses() {
  unsigned OptLevel = CodeGenOpts.OptimizationLevel;
  CodeGenOptions::InliningMethod Inlining = CodeGenOpts.Inlining;

  // Handle disabling of LLVM optimization, where we want to preserve the
  // internal module before any optimization.
  if (CodeGenOpts.DisableLLVMOpts) {
    OptLevel = 0;
    Inlining = CodeGenOpts.NoInlining;
  }
  
  PassManagerBuilder PMBuilder;
  PMBuilder.OptLevel = OptLevel;
  PMBuilder.SizeLevel = CodeGenOpts.OptimizeSize;

  PMBuilder.DisableSimplifyLibCalls = !CodeGenOpts.SimplifyLibCalls;
  PMBuilder.DisableUnitAtATime = !CodeGenOpts.UnitAtATime;
  PMBuilder.DisableUnrollLoops = !CodeGenOpts.UnrollLoops;

  // In ObjC ARC mode, add the main ARC optimization passes.
  if (LangOpts.ObjCAutoRefCount) {
    PMBuilder.addExtension(PassManagerBuilder::EP_EarlyAsPossible,
                           addObjCARCExpandPass);
    PMBuilder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate,
                           addObjCARCOptPass);
  }

  if (LangOpts.AddressSanitizer) {
    PMBuilder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate,
                           addAddressSanitizerPass);
    PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                           addAddressSanitizerPass);
  }
  
  // Figure out TargetLibraryInfo.
  Triple TargetTriple(TheModule->getTargetTriple());
  PMBuilder.LibraryInfo = new TargetLibraryInfo(TargetTriple);
  if (!CodeGenOpts.SimplifyLibCalls)
    PMBuilder.LibraryInfo->disableAllFunctions();
  
  switch (Inlining) {
  case CodeGenOptions::NoInlining: break;
  case CodeGenOptions::NormalInlining: {
    // FIXME: Derive these constants in a principled fashion.
    unsigned Threshold = 225;
    if (CodeGenOpts.OptimizeSize == 1)      // -Os
      Threshold = 75;
    else if (CodeGenOpts.OptimizeSize == 2) // -Oz
      Threshold = 25;
    else if (OptLevel > 2)
      Threshold = 275;
    PMBuilder.Inliner = createFunctionInliningPass(Threshold);
    break;
  }
  case CodeGenOptions::OnlyAlwaysInlining:
    // Respect always_inline.
    PMBuilder.Inliner = createAlwaysInlinerPass();
    break;
  }

 
  // Set up the per-function pass manager.
  FunctionPassManager *FPM = getPerFunctionPasses();
  if (CodeGenOpts.VerifyModule)
    FPM->add(createVerifierPass());
  PMBuilder.populateFunctionPassManager(*FPM);

  // Set up the per-module pass manager.
  PassManager *MPM = getPerModulePasses();

  if (CodeGenOpts.EmitGcovArcs || CodeGenOpts.EmitGcovNotes) {
    MPM->add(createGCOVProfilerPass(CodeGenOpts.EmitGcovNotes,
                                    CodeGenOpts.EmitGcovArcs,
                                    TargetTriple.isMacOSX()));

    if (!CodeGenOpts.DebugInfo)
      MPM->add(createStripSymbolsPass(true));
  }
  
  
  PMBuilder.populateModulePassManager(*MPM);
}

static void addOptimizationPasses(PassManagerBase &mpm, FunctionPassManager &fpm,
#endif
                                  unsigned optLevel, unsigned sizeLevel) {
    fpm.add(createVerifierPass());                  // Verify that input is correct

    PassManagerBuilder builder;
    builder.OptLevel = optLevel;
    builder.SizeLevel = sizeLevel;

    if (willInline()) {
        unsigned threshold = 225;
        if (sizeLevel == 1)      // -Os
            threshold = 75;
        else if (sizeLevel == 2) // -Oz
            threshold = 25;
        if (optLevel > 2)
            threshold = 275;
        builder.Inliner = createFunctionInliningPass(threshold);
    } else {
        builder.Inliner = createAlwaysInlinerPass();
    }
#if LDC_LLVM_VER < 304
    builder.DisableSimplifyLibCalls = disableSimplifyLibCalls;
#endif
    builder.DisableUnitAtATime = !unitAtATime;
    builder.DisableUnrollLoops = optLevel == 0;

#if LDC_LLVM_VER >= 304
    builder.DisableUnrollLoops = (disableLoopUnrolling.getNumOccurrences() > 0) ?
                                  disableLoopUnrolling : optLevel == 0;

    // This is final, unless there is a #pragma vectorize enable
    if (disableLoopVectorization)
        builder.LoopVectorize = false;
    // If option wasn't forced via cmd line (-vectorize-loops, -loop-vectorize)
    else if (!builder.LoopVectorize)
      builder.LoopVectorize = optLevel > 1 && sizeLevel < 2;

    // When #pragma vectorize is on for SLP, do the same as above
    builder.SLPVectorize =
        disableSLPVectorization ? false : optLevel > 1 && sizeLevel < 2;
#else
    /* builder.Vectorize is set in ctor from command line switch */
#endif

#if LDC_LLVM_VER >= 303
    if (opts::sanitize == opts::AddressSanitizer) {
        builder.addExtension(PassManagerBuilder::EP_OptimizerLast,
                             addAddressSanitizerPasses);
        builder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                             addAddressSanitizerPasses);
    }

    if (opts::sanitize == opts::MemorySanitizer) {
        builder.addExtension(PassManagerBuilder::EP_OptimizerLast,
                             addMemorySanitizerPass);
        builder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                             addMemorySanitizerPass);
    }

    if (opts::sanitize == opts::ThreadSanitizer) {
        builder.addExtension(PassManagerBuilder::EP_OptimizerLast,
                             addThreadSanitizerPass);
        builder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                             addThreadSanitizerPass);
    }
#endif

    if (!disableLangSpecificPasses) {
        if (!disableSimplifyDruntimeCalls)
            builder.addExtension(PassManagerBuilder::EP_LoopOptimizerEnd, addSimplifyDRuntimeCallsPass);

        if (!disableGCToStack)
            builder.addExtension(PassManagerBuilder::EP_LoopOptimizerEnd, addGarbageCollect2StackPass);
    }

    // EP_OptimizerLast does not exist in LLVM 3.0, add it manually below.
    builder.addExtension(PassManagerBuilder::EP_OptimizerLast, addStripExternalsPass);

    builder.populateFunctionPassManager(fpm);
    builder.populateModulePassManager(mpm);
}

void AMDGPUTargetMachine::adjustPassManager(PassManagerBuilder &Builder) {
  Builder.DivergentTarget = true;

  bool EnableOpt = getOptLevel() > CodeGenOpt::None;
  bool Internalize = InternalizeSymbols;
  bool EarlyInline = EarlyInlineAll && EnableOpt && !EnableAMDGPUFunctionCalls;
  bool AMDGPUAA = EnableAMDGPUAliasAnalysis && EnableOpt;
  bool LibCallSimplify = EnableLibCallSimplify && EnableOpt;

  if (EnableAMDGPUFunctionCalls) {
    delete Builder.Inliner;
    Builder.Inliner = createAMDGPUFunctionInliningPass();
  }

  if (Internalize) {
    // If we're generating code, we always have the whole program available. The
    // relocations expected for externally visible functions aren't supported,
    // so make sure every non-entry function is hidden.
    Builder.addExtension(
      PassManagerBuilder::EP_EnabledOnOptLevel0,
      [](const PassManagerBuilder &, legacy::PassManagerBase &PM) {
        PM.add(createInternalizePass(mustPreserveGV));
      });
  }

  Builder.addExtension(
    PassManagerBuilder::EP_ModuleOptimizerEarly,
    [Internalize, EarlyInline, AMDGPUAA](const PassManagerBuilder &,
                                         legacy::PassManagerBase &PM) {
      if (AMDGPUAA) {
        PM.add(createAMDGPUAAWrapperPass());
        PM.add(createAMDGPUExternalAAWrapperPass());
      }
      PM.add(createAMDGPUUnifyMetadataPass());
      if (Internalize) {
        PM.add(createInternalizePass(mustPreserveGV));
        PM.add(createGlobalDCEPass());
      }
      if (EarlyInline)
        PM.add(createAMDGPUAlwaysInlinePass(false));
  });

  const auto &Opt = Options;
  Builder.addExtension(
    PassManagerBuilder::EP_EarlyAsPossible,
    [AMDGPUAA, LibCallSimplify, &Opt](const PassManagerBuilder &,
                                      legacy::PassManagerBase &PM) {
      if (AMDGPUAA) {
        PM.add(createAMDGPUAAWrapperPass());
        PM.add(createAMDGPUExternalAAWrapperPass());
      }
      PM.add(llvm::createAMDGPUUseNativeCallsPass());
      if (LibCallSimplify)
        PM.add(llvm::createAMDGPUSimplifyLibCallsPass(Opt));
  });

  Builder.addExtension(
    PassManagerBuilder::EP_CGSCCOptimizerLate,
    [](const PassManagerBuilder &, legacy::PassManagerBase &PM) {
      // Add infer address spaces pass to the opt pipeline after inlining
      // but before SROA to increase SROA opportunities.
      PM.add(createInferAddressSpacesPass());
  });
}

void EmitAssemblyHelper::CreatePasses() {
  unsigned OptLevel = CodeGenOpts.OptimizationLevel;
  CodeGenOptions::InliningMethod Inlining = CodeGenOpts.Inlining;

  // Handle disabling of LLVM optimization, where we want to preserve the
  // internal module before any optimization.
  if (CodeGenOpts.DisableLLVMOpts) {
    OptLevel = 0;
    Inlining = CodeGenOpts.NoInlining;
  }
  
  PassManagerBuilder PMBuilder;
  PMBuilder.OptLevel = OptLevel;
  PMBuilder.SizeLevel = CodeGenOpts.OptimizeSize;

  PMBuilder.DisableSimplifyLibCalls = !CodeGenOpts.SimplifyLibCalls;
  PMBuilder.DisableUnitAtATime = !CodeGenOpts.UnitAtATime;
  PMBuilder.DisableUnrollLoops = !CodeGenOpts.UnrollLoops;

  // In ObjC ARC mode, add the main ARC optimization passes.
  if (LangOpts.ObjCAutoRefCount) {
    PMBuilder.addExtension(PassManagerBuilder::EP_EarlyAsPossible,
                           addObjCARCExpandPass);
    PMBuilder.addExtension(PassManagerBuilder::EP_ModuleOptimizerEarly,
                           addObjCARCAPElimPass);
    PMBuilder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate,
                           addObjCARCOptPass);
  }

  if (CodeGenOpts.BoundsChecking > 0) {
    BoundsChecking = CodeGenOpts.BoundsChecking;
    PMBuilder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate,
                           addBoundsCheckingPass);
    PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                           addBoundsCheckingPass);
  }

  if (LangOpts.AddressSanitizer) {
    PMBuilder.addExtension(PassManagerBuilder::EP_ScalarOptimizerLate,
                           addAddressSanitizerPass);
    PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                           addAddressSanitizerPass);
  }

  if (LangOpts.ThreadSanitizer) {
    PMBuilder.addExtension(PassManagerBuilder::EP_OptimizerLast,
                           addThreadSanitizerPass);
    PMBuilder.addExtension(PassManagerBuilder::EP_EnabledOnOptLevel0,
                           addThreadSanitizerPass);
  }

  // Figure out TargetLibraryInfo.
  Triple TargetTriple(TheModule->getTargetTriple());
  PMBuilder.LibraryInfo = new TargetLibraryInfo(TargetTriple);
  if (!CodeGenOpts.SimplifyLibCalls)
    PMBuilder.LibraryInfo->disableAllFunctions();
  
  switch (Inlining) {
  case CodeGenOptions::NoInlining: break;
  case CodeGenOptions::NormalInlining: {
    // FIXME: Derive these constants in a principled fashion.
    unsigned Threshold = 225;
    if (CodeGenOpts.OptimizeSize == 1)      // -Os
      Threshold = 75;
    else if (CodeGenOpts.OptimizeSize == 2) // -Oz
      Threshold = 25;
    else if (OptLevel > 2)
      Threshold = 275;
    PMBuilder.Inliner = createFunctionInliningPass(Threshold);
    break;
  }
  case CodeGenOptions::OnlyAlwaysInlining:
    // Respect always_inline.
    if (OptLevel == 0)
      // Do not insert lifetime intrinsics at -O0.
      PMBuilder.Inliner = createAlwaysInlinerPass(false);
    else
      PMBuilder.Inliner = createAlwaysInlinerPass();
    break;
  }

 
  // Set up the per-function pass manager.
  FunctionPassManager *FPM = getPerFunctionPasses();
  if (CodeGenOpts.VerifyModule)
    FPM->add(createVerifierPass());
  PMBuilder.populateFunctionPassManager(*FPM);

  // Set up the per-module pass manager.
  PassManager *MPM = getPerModulePasses();

  if (CodeGenOpts.EmitGcovArcs || CodeGenOpts.EmitGcovNotes) {
    MPM->add(createGCOVProfilerPass(CodeGenOpts.EmitGcovNotes,
                                    CodeGenOpts.EmitGcovArcs,
                                    TargetTriple.isMacOSX()));

    if (CodeGenOpts.DebugInfo == CodeGenOptions::NoDebugInfo)
      MPM->add(createStripSymbolsPass(true));
  }

//.........这里部分代码省略.........