C++ ManagedStatic类代码示例

void PassManagerBuilder::addGlobalExtension(
    PassManagerBuilder::ExtensionPointTy Ty,
    PassManagerBuilder::ExtensionFn Fn) {
  GlobalExtensions->push_back(std::make_pair(Ty, Fn));
}

void PassManagerBuilder::populateModulePassManager(
    legacy::PassManagerBase &MPM) {
  if (!PGOSampleUse.empty()) {
    MPM.add(createPruneEHPass());
    MPM.add(createSampleProfileLoaderPass(PGOSampleUse));
  }

  // Allow forcing function attributes as a debugging and tuning aid.
  MPM.add(createForceFunctionAttrsLegacyPass());

  // If all optimizations are disabled, just run the always-inline pass and,
  // if enabled, the function merging pass.
  if (OptLevel == 0) {
    addPGOInstrPasses(MPM);
    if (Inliner) {
      MPM.add(Inliner);
      Inliner = nullptr;
    }

    // FIXME: The BarrierNoopPass is a HACK! The inliner pass above implicitly
    // creates a CGSCC pass manager, but we don't want to add extensions into
    // that pass manager. To prevent this we insert a no-op module pass to reset
    // the pass manager to get the same behavior as EP_OptimizerLast in non-O0
    // builds. The function merging pass is
    if (MergeFunctions)
      MPM.add(createMergeFunctionsPass());
    else if (!GlobalExtensions->empty() || !Extensions.empty())
      MPM.add(createBarrierNoopPass());

    if (PrepareForThinLTO)
      // Rename anon globals to be able to export them in the summary.
      MPM.add(createNameAnonGlobalPass());

    addExtensionsToPM(EP_EnabledOnOptLevel0, MPM);
    return;
  }

  // Add LibraryInfo if we have some.
  if (LibraryInfo)
    MPM.add(new TargetLibraryInfoWrapperPass(*LibraryInfo));

  addInitialAliasAnalysisPasses(MPM);

  // For ThinLTO there are two passes of indirect call promotion. The
  // first is during the compile phase when PerformThinLTO=false and
  // intra-module indirect call targets are promoted. The second is during
  // the ThinLTO backend when PerformThinLTO=true, when we promote imported
  // inter-module indirect calls. For that we perform indirect call promotion
  // earlier in the pass pipeline, here before globalopt. Otherwise imported
  // available_externally functions look unreferenced and are removed.
  if (PerformThinLTO)
    MPM.add(createPGOIndirectCallPromotionLegacyPass(/*InLTO = */ true,
                                                     !PGOSampleUse.empty()));

  if (!DisableUnitAtATime) {
    // Infer attributes about declarations if possible.
    MPM.add(createInferFunctionAttrsLegacyPass());

    addExtensionsToPM(EP_ModuleOptimizerEarly, MPM);

    MPM.add(createIPSCCPPass());          // IP SCCP
    MPM.add(createGlobalOptimizerPass()); // Optimize out global vars
    // Promote any localized global vars.
    MPM.add(createPromoteMemoryToRegisterPass());

    MPM.add(createDeadArgEliminationPass()); // Dead argument elimination

    addInstructionCombiningPass(MPM); // Clean up after IPCP & DAE
    addExtensionsToPM(EP_Peephole, MPM);
    MPM.add(createCFGSimplificationPass()); // Clean up after IPCP & DAE
  }

  if (!PerformThinLTO) {
    /// PGO instrumentation is added during the compile phase for ThinLTO, do
    /// not run it a second time
    addPGOInstrPasses(MPM);
    // Indirect call promotion that promotes intra-module targets only.
    // For ThinLTO this is done earlier due to interactions with globalopt
    // for imported functions.
    MPM.add(
        createPGOIndirectCallPromotionLegacyPass(false, !PGOSampleUse.empty()));
  }

  if (EnableNonLTOGlobalsModRef)
    // We add a module alias analysis pass here. In part due to bugs in the
    // analysis infrastructure this "works" in that the analysis stays alive
    // for the entire SCC pass run below.
    MPM.add(createGlobalsAAWrapperPass());

  // Start of CallGraph SCC passes.
  if (!DisableUnitAtATime)
    MPM.add(createPruneEHPass()); // Remove dead EH info
  if (Inliner) {
    MPM.add(Inliner);
    Inliner = nullptr;
  }
  if (!DisableUnitAtATime)
    MPM.add(createPostOrderFunctionAttrsLegacyPass());
  if (OptLevel > 2)
    MPM.add(createArgumentPromotionPass()); // Scalarize uninlined fn args
//.........这里部分代码省略.........

void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
  // If all optimizations are disabled, just run the always-inline pass.
  if (OptLevel == 0) {
    if (Inliner) {
      MPM.add(Inliner);
      Inliner = 0;
    }

    // FIXME: This is a HACK! The inliner pass above implicitly creates a CGSCC
    // pass manager, but we don't want to add extensions into that pass manager.
    // To prevent this we must insert a no-op module pass to reset the pass
    // manager to get the same behavior as EP_OptimizerLast in non-O0 builds.
    if (!GlobalExtensions->empty() || !Extensions.empty())
      MPM.add(createBarrierNoopPass());

    addExtensionsToPM(EP_EnabledOnOptLevel0, MPM);
    return;
  }

  // Add LibraryInfo if we have some.
  if (LibraryInfo) MPM.add(new TargetLibraryInfo(*LibraryInfo));

  addInitialAliasAnalysisPasses(MPM);

  if (!DisableUnitAtATime) {
    addExtensionsToPM(EP_ModuleOptimizerEarly, MPM);

    MPM.add(createGlobalOptimizerPass());     // Optimize out global vars

    MPM.add(createIPSCCPPass());              // IP SCCP
    MPM.add(createDeadArgEliminationPass());  // Dead argument elimination

    MPM.add(createInstructionCombiningPass());// Clean up after IPCP & DAE
    MPM.add(createCFGSimplificationPass());   // Clean up after IPCP & DAE
  }

  // Start of CallGraph SCC passes.
  if (!DisableUnitAtATime)
    MPM.add(createPruneEHPass());             // Remove dead EH info
  if (Inliner) {
    MPM.add(Inliner);
    Inliner = 0;
  }
  if (!DisableUnitAtATime)
    MPM.add(createFunctionAttrsPass());       // Set readonly/readnone attrs
  if (OptLevel > 2)
    MPM.add(createArgumentPromotionPass());   // Scalarize uninlined fn args

  // Start of function pass.
  // Break up aggregate allocas, using SSAUpdater.
  if (UseNewSROA)
    MPM.add(createSROAPass(/*RequiresDomTree*/ false));
  else
    MPM.add(createScalarReplAggregatesPass(-1, false));
  MPM.add(createEarlyCSEPass());              // Catch trivial redundancies
  if (!DisableSimplifyLibCalls)
    MPM.add(createSimplifyLibCallsPass());    // Library Call Optimizations
  MPM.add(createJumpThreadingPass());         // Thread jumps.
  MPM.add(createCorrelatedValuePropagationPass()); // Propagate conditionals
  MPM.add(createCFGSimplificationPass());     // Merge & remove BBs
  MPM.add(createInstructionCombiningPass());  // Combine silly seq's

  MPM.add(createTailCallEliminationPass());   // Eliminate tail calls
  MPM.add(createCFGSimplificationPass());     // Merge & remove BBs
  MPM.add(createReassociatePass());           // Reassociate expressions
  MPM.add(createLoopRotatePass());            // Rotate Loop
  MPM.add(createLICMPass());                  // Hoist loop invariants
  MPM.add(createLoopUnswitchPass(SizeLevel || OptLevel < 3));
  MPM.add(createInstructionCombiningPass());
  MPM.add(createIndVarSimplifyPass());        // Canonicalize indvars
  MPM.add(createLoopIdiomPass());             // Recognize idioms like memset.
  MPM.add(createLoopDeletionPass());          // Delete dead loops

  if (LoopVectorize && OptLevel > 2)
    MPM.add(createLoopVectorizePass());

  if (!DisableUnrollLoops)
    MPM.add(createLoopUnrollPass());          // Unroll small loops
  addExtensionsToPM(EP_LoopOptimizerEnd, MPM);

  if (OptLevel > 1)
    MPM.add(createGVNPass());                 // Remove redundancies
  MPM.add(createMemCpyOptPass());             // Remove memcpy / form memset
  MPM.add(createSCCPPass());                  // Constant prop with SCCP

  // Run instcombine after redundancy elimination to exploit opportunities
  // opened up by them.
  MPM.add(createInstructionCombiningPass());
  MPM.add(createJumpThreadingPass());         // Thread jumps
  MPM.add(createCorrelatedValuePropagationPass());
  MPM.add(createDeadStoreEliminationPass());  // Delete dead stores

  addExtensionsToPM(EP_ScalarOptimizerLate, MPM);

  if (SLPVectorize)
    MPM.add(createSLPVectorizerPass());     // Vectorize parallel scalar chains.

  if (BBVectorize) {
    MPM.add(createBBVectorizePass());
    MPM.add(createInstructionCombiningPass());
//.........这里部分代码省略.........

void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
  // If all optimizations are disabled, just run the always-inline pass and,
  // if enabled, the function merging pass.
  if (OptLevel == 0) {
    if (Inliner) {
      MPM.add(Inliner);
      Inliner = nullptr;
    }

    // FIXME: The BarrierNoopPass is a HACK! The inliner pass above implicitly
    // creates a CGSCC pass manager, but we don't want to add extensions into
    // that pass manager. To prevent this we insert a no-op module pass to reset
    // the pass manager to get the same behavior as EP_OptimizerLast in non-O0
    // builds. The function merging pass is 
    if (MergeFunctions)
      MPM.add(createMergeFunctionsPass());
    else if (!GlobalExtensions->empty() || !Extensions.empty())
      MPM.add(createBarrierNoopPass());

    addExtensionsToPM(EP_EnabledOnOptLevel0, MPM);
    return;
  }

  // Add LibraryInfo if we have some.
  if (LibraryInfo) MPM.add(new TargetLibraryInfo(*LibraryInfo));

  addInitialAliasAnalysisPasses(MPM);

  if (!DisableUnitAtATime) {
    addExtensionsToPM(EP_ModuleOptimizerEarly, MPM);

    MPM.add(createIPSCCPPass());              // IP SCCP
    MPM.add(createGlobalOptimizerPass());     // Optimize out global vars

    MPM.add(createDeadArgEliminationPass());  // Dead argument elimination

    MPM.add(createInstructionCombiningPass());// Clean up after IPCP & DAE
    addExtensionsToPM(EP_Peephole, MPM);
    MPM.add(createCFGSimplificationPass());   // Clean up after IPCP & DAE
  }

  // Start of CallGraph SCC passes.
  if (!DisableUnitAtATime)
    MPM.add(createPruneEHPass());             // Remove dead EH info
  if (Inliner) {
    MPM.add(Inliner);
    Inliner = nullptr;
  }
  if (!DisableUnitAtATime)
    MPM.add(createFunctionAttrsPass());       // Set readonly/readnone attrs
  if (OptLevel > 2)
    MPM.add(createArgumentPromotionPass());   // Scalarize uninlined fn args

  // Start of function pass.
  // Break up aggregate allocas, using SSAUpdater.
  if (UseNewSROA)
    MPM.add(createSROAPass(/*RequiresDomTree*/ false));
  else
    MPM.add(createScalarReplAggregatesPass(-1, false));
  MPM.add(createEarlyCSEPass());              // Catch trivial redundancies
  MPM.add(createJumpThreadingPass());         // Thread jumps.
  MPM.add(createCorrelatedValuePropagationPass()); // Propagate conditionals
  MPM.add(createCFGSimplificationPass());     // Merge & remove BBs
  MPM.add(createInstructionCombiningPass());  // Combine silly seq's
  addExtensionsToPM(EP_Peephole, MPM);

  if (!DisableTailCalls)
    MPM.add(createTailCallEliminationPass()); // Eliminate tail calls
  MPM.add(createCFGSimplificationPass());     // Merge & remove BBs
  MPM.add(createReassociatePass());           // Reassociate expressions
  MPM.add(createLoopRotatePass());            // Rotate Loop
  MPM.add(createLICMPass());                  // Hoist loop invariants
  MPM.add(createLoopUnswitchPass(SizeLevel || OptLevel < 3));
  MPM.add(createInstructionCombiningPass());
  MPM.add(createIndVarSimplifyPass());        // Canonicalize indvars
  MPM.add(createLoopIdiomPass());             // Recognize idioms like memset.
  MPM.add(createLoopDeletionPass());          // Delete dead loops

  if (!DisableUnrollLoops)
    MPM.add(createSimpleLoopUnrollPass());    // Unroll small loops
  addExtensionsToPM(EP_LoopOptimizerEnd, MPM);

  if (OptLevel > 1) {
    if (EnableMLSM)
      MPM.add(createMergedLoadStoreMotionPass()); // Merge ld/st in diamonds
    MPM.add(createGVNPass(DisableGVNLoadPRE));  // Remove redundancies
  }
  MPM.add(createMemCpyOptPass());             // Remove memcpy / form memset
  MPM.add(createSCCPPass());                  // Constant prop with SCCP

  // Run instcombine after redundancy elimination to exploit opportunities
  // opened up by them.
  MPM.add(createInstructionCombiningPass());
  addExtensionsToPM(EP_Peephole, MPM);
  MPM.add(createJumpThreadingPass());         // Thread jumps
  MPM.add(createCorrelatedValuePropagationPass());
  MPM.add(createDeadStoreEliminationPass());  // Delete dead stores

  addExtensionsToPM(EP_ScalarOptimizerLate, MPM);

//.........这里部分代码省略.........

bool CrashRecoveryContext::isRecoveringFromCrash() {
  return tlIsRecoveringFromCrash->get() != nullptr;
}

AttributeListImpl::~AttributeListImpl() {
  // NOTE: Lock must be acquired by caller.
  AttributesLists->RemoveNode(this);
}

void LeakDetector::removeGarbageObjectImpl(void *Object) {
  sys::SmartScopedLock<true> Lock(*ObjectsLock);
  Objects->removeGarbage(Object);
}

static void clearGarbage(LLVMContext &Context) {
  Objects->clear();
  Context.pImpl->LLVMObjects.clear();
}

std::string &PluginLoader::getPlugin(unsigned num) {
  sys::SmartScopedLock<true> Lock(*PluginsLock);
  assert(Plugins.isConstructed() && num < Plugins->size() &&
         "Asking for an out of bounds plugin");
  return (*Plugins)[num];
}

unsigned PluginLoader::getNumPlugins() {
  sys::SmartScopedLock<true> Lock(*PluginsLock);
  return Plugins.isConstructed() ? Plugins->size() : 0;
}