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📄 AliasAnalysis.h(51.98 KB)
📄 AliasAnalysisEvaluator.h(2.7 KB)
📄 AliasSetTracker.h(15.42 KB)
📄 AssumeBundleQueries.h(6.66 KB)
📄 AssumptionCache.h(8.39 KB)
📄 BasicAliasAnalysis.h(10.2 KB)
📄 BlockFrequencyInfo.h(5.59 KB)
📄 BlockFrequencyInfoImpl.h(56.46 KB)
📄 BranchProbabilityInfo.h(10.1 KB)
📄 CFG.h(7.76 KB)
📄 CFGPrinter.h(9.31 KB)
📄 CFLAliasAnalysisUtils.h(1.66 KB)
📄 CFLAndersAliasAnalysis.h(3.97 KB)
📄 CFLSteensAliasAnalysis.h(4.58 KB)
📄 CGSCCPassManager.h(41.2 KB)
📄 CallGraph.h(18.88 KB)
📄 CallGraphSCCPass.h(5.01 KB)
📄 CallPrinter.h(799 B)
📄 CaptureTracking.h(4.78 KB)
📄 CmpInstAnalysis.h(2.57 KB)
📄 CodeMetrics.h(3.15 KB)
📄 ConstantFolding.h(8.01 KB)
📄 DDG.h(19.15 KB)
📄 DOTGraphTraitsPass.h(5.5 KB)
📄 DemandedBits.h(4.07 KB)
📄 DependenceAnalysis.h(41.83 KB)
📄 DependenceGraphBuilder.h(7.74 KB)
📄 DivergenceAnalysis.h(7.38 KB)
📄 DomPrinter.h(1.04 KB)
📄 DomTreeUpdater.h(13.2 KB)
📄 DominanceFrontier.h(6.63 KB)
📄 DominanceFrontierImpl.h(7.12 KB)
📄 EHPersonalities.h(3.22 KB)
📄 GlobalsModRef.h(5.96 KB)
📄 GuardUtils.h(2.11 KB)
📄 HeatUtils.h(1.16 KB)
📄 IVDescriptors.h(14.56 KB)
📄 IVUsers.h(6.07 KB)
📄 IndirectCallPromotionAnalysis.h(2.61 KB)
📄 IndirectCallVisitor.h(1.16 KB)
📄 InlineAdvisor.h(8.71 KB)
📄 InlineCost.h(11.33 KB)
📄 InlineFeaturesAnalysis.h(1.5 KB)
📄 InlineModelFeatureMaps.h(3.41 KB)
📄 InlineSizeEstimatorAnalysis.h(1.07 KB)
📄 InstructionPrecedenceTracking.h(5.9 KB)
📄 InstructionSimplify.h(13.36 KB)
📄 Interval.h(4.84 KB)
📄 IntervalIterator.h(10.64 KB)
📄 IntervalPartition.h(4.05 KB)
📄 IteratedDominanceFrontier.h(2.62 KB)
📄 LazyBlockFrequencyInfo.h(4.34 KB)
📄 LazyBranchProbabilityInfo.h(4.21 KB)
📄 LazyCallGraph.h(50.13 KB)
📄 LazyValueInfo.h(5.4 KB)
📄 LegacyDivergenceAnalysis.h(2.53 KB)
📄 Lint.h(1.35 KB)
📄 Loads.h(7.86 KB)
📄 LoopAccessAnalysis.h(29.75 KB)
📄 LoopAnalysisManager.h(5.83 KB)
📄 LoopCacheAnalysis.h(11.91 KB)
📄 LoopInfo.h(48.27 KB)
📄 LoopInfoImpl.h(27.14 KB)
📄 LoopIterator.h(8.83 KB)
📄 LoopNestAnalysis.h(5.61 KB)
📄 LoopPass.h(4.29 KB)
📄 LoopUnrollAnalyzer.h(3.42 KB)
📄 MLInlineAdvisor.h(3.48 KB)
📄 MLModelRunner.h(1.16 KB)
📄 MemoryBuiltins.h(13.42 KB)
📄 MemoryDependenceAnalysis.h(20.82 KB)
📄 MemoryLocation.h(10.99 KB)
📄 MemorySSA.h(45.92 KB)
📄 MemorySSAUpdater.h(14.55 KB)
📄 ModuleSummaryAnalysis.h(3.44 KB)
📄 MustExecute.h(20.2 KB)
📄 ObjCARCAliasAnalysis.h(3.35 KB)
📄 ObjCARCAnalysisUtils.h(10.22 KB)
📄 ObjCARCInstKind.h(4.87 KB)
📄 OptimizationRemarkEmitter.h(5.93 KB)
📄 PHITransAddr.h(4.77 KB)
📄 Passes.h(3.88 KB)
📄 PhiValues.h(5.25 KB)
📄 PostDominators.h(3.41 KB)
📄 ProfileSummaryInfo.h(9.3 KB)
📄 PtrUseVisitor.h(9.96 KB)
📄 RegionInfo.h(35.23 KB)
📄 RegionInfoImpl.h(25.16 KB)
📄 RegionIterator.h(14.07 KB)
📄 RegionPass.h(4.05 KB)
📄 RegionPrinter.h(2.25 KB)
📄 ScalarEvolution.h(89.21 KB)
📄 ScalarEvolutionAliasAnalysis.h(2.09 KB)
📄 ScalarEvolutionDivision.h(2.48 KB)
📄 ScalarEvolutionExpressions.h(28.61 KB)
📄 ScalarEvolutionNormalization.h(2.47 KB)
📄 ScopedNoAliasAA.h(2.83 KB)
📄 SparsePropagation.h(19.43 KB)
📄 StackLifetime.h(6.16 KB)
📄 StackSafetyAnalysis.h(4.91 KB)
📄 SyncDependenceAnalysis.h(2.85 KB)
📄 SyntheticCountsUtils.h(1.85 KB)
📄 TargetFolder.h(11.04 KB)
📄 TargetLibraryInfo.def(55.35 KB)
📄 TargetLibraryInfo.h(16.86 KB)
📄 TargetTransformInfo.h(96.51 KB)
📄 TargetTransformInfoImpl.h(37.63 KB)
📄 Trace.h(4.1 KB)
📄 TypeBasedAliasAnalysis.h(3.05 KB)
📄 TypeMetadataUtils.h(1.94 KB)
📁 Utils
📄 ValueLattice.h(15.14 KB)
📄 ValueLatticeUtils.h(1.66 KB)
📄 ValueTracking.h(35.82 KB)
📄 VecFuncs.def(10.94 KB)
📄 VectorUtils.h(37.26 KB)

Editing: CFGPrinter.h

//===-- CFGPrinter.h - CFG printer external interface -----------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines a 'dot-cfg' analysis pass, which emits the
// cfg.<fnname>.dot file for each function in the program, with a graph of the
// CFG for that function.
//
// This file defines external functions that can be called to explicitly
// instantiate the CFG printer.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_ANALYSIS_CFGPRINTER_H
#define LLVM_ANALYSIS_CFGPRINTER_H

#include "llvm/Analysis/BlockFrequencyInfo.h"
#include "llvm/Analysis/BranchProbabilityInfo.h"
#include "llvm/Analysis/HeatUtils.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/PassManager.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/GraphWriter.h"

namespace llvm {
class CFGViewerPass : public PassInfoMixin<CFGViewerPass> {
public:
  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
};

class CFGOnlyViewerPass : public PassInfoMixin<CFGOnlyViewerPass> {
public:
  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
};

class CFGPrinterPass : public PassInfoMixin<CFGPrinterPass> {
public:
  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
};

class CFGOnlyPrinterPass : public PassInfoMixin<CFGOnlyPrinterPass> {
public:
  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
};

class DOTFuncInfo {
private:
  const Function *F;
  const BlockFrequencyInfo *BFI;
  const BranchProbabilityInfo *BPI;
  uint64_t MaxFreq;
  bool ShowHeat;
  bool EdgeWeights;
  bool RawWeights;

public:
  DOTFuncInfo(const Function *F) : DOTFuncInfo(F, nullptr, nullptr, 0) {}

DOTFuncInfo(const Function *F, const BlockFrequencyInfo *BFI,
              const BranchProbabilityInfo *BPI, uint64_t MaxFreq)
      : F(F), BFI(BFI), BPI(BPI), MaxFreq(MaxFreq) {
    ShowHeat = false;
    EdgeWeights = !!BPI; // Print EdgeWeights when BPI is available.
    RawWeights = !!BFI;  // Print RawWeights when BFI is available.
  }

const BlockFrequencyInfo *getBFI() { return BFI; }

const BranchProbabilityInfo *getBPI() { return BPI; }

const Function *getFunction() { return this->F; }

uint64_t getMaxFreq() { return MaxFreq; }

uint64_t getFreq(const BasicBlock *BB) {
    return BFI->getBlockFreq(BB).getFrequency();
  }

void setHeatColors(bool ShowHeat) { this->ShowHeat = ShowHeat; }

bool showHeatColors() { return ShowHeat; }

void setRawEdgeWeights(bool RawWeights) { this->RawWeights = RawWeights; }

bool useRawEdgeWeights() { return RawWeights; }

void setEdgeWeights(bool EdgeWeights) { this->EdgeWeights = EdgeWeights; }

bool showEdgeWeights() { return EdgeWeights; }
};

template <>
struct GraphTraits<DOTFuncInfo *> : public GraphTraits<const BasicBlock *> {
  static NodeRef getEntryNode(DOTFuncInfo *CFGInfo) {
    return &(CFGInfo->getFunction()->getEntryBlock());
  }

// nodes_iterator/begin/end - Allow iteration over all nodes in the graph
  using nodes_iterator = pointer_iterator<Function::const_iterator>;

static nodes_iterator nodes_begin(DOTFuncInfo *CFGInfo) {
    return nodes_iterator(CFGInfo->getFunction()->begin());
  }

static nodes_iterator nodes_end(DOTFuncInfo *CFGInfo) {
    return nodes_iterator(CFGInfo->getFunction()->end());
  }

static size_t size(DOTFuncInfo *CFGInfo) {
    return CFGInfo->getFunction()->size();
  }
};

template <>
struct DOTGraphTraits<DOTFuncInfo *> : public DefaultDOTGraphTraits {

// Cache for is hidden property
  llvm::DenseMap<const BasicBlock *, bool> isHiddenBasicBlock;

DOTGraphTraits(bool isSimple = false) : DefaultDOTGraphTraits(isSimple) {}

static std::string getGraphName(DOTFuncInfo *CFGInfo) {
    return "CFG for '" + CFGInfo->getFunction()->getName().str() + "' function";
  }

static std::string getSimpleNodeLabel(const BasicBlock *Node, DOTFuncInfo *) {
    if (!Node->getName().empty())
      return Node->getName().str();

std::string Str;
    raw_string_ostream OS(Str);

Node->printAsOperand(OS, false);
    return OS.str();
  }

static std::string getCompleteNodeLabel(const BasicBlock *Node,
                                          DOTFuncInfo *) {
    enum { MaxColumns = 80 };
    std::string Str;
    raw_string_ostream OS(Str);

if (Node->getName().empty()) {
      Node->printAsOperand(OS, false);
      OS << ":";
    }

OS << *Node;
    std::string OutStr = OS.str();
    if (OutStr[0] == '\n')
      OutStr.erase(OutStr.begin());

// Process string output to make it nicer...
    unsigned ColNum = 0;
    unsigned LastSpace = 0;
    for (unsigned i = 0; i != OutStr.length(); ++i) {
      if (OutStr[i] == '\n') { // Left justify
        OutStr[i] = '\\';
        OutStr.insert(OutStr.begin() + i + 1, 'l');
        ColNum = 0;
        LastSpace = 0;
      } else if (OutStr[i] == ';') {             // Delete comments!
        unsigned Idx = OutStr.find('\n', i + 1); // Find end of line
        OutStr.erase(OutStr.begin() + i, OutStr.begin() + Idx);
        --i;
      } else if (ColNum == MaxColumns) { // Wrap lines.
        // Wrap very long names even though we can't find a space.
        if (!LastSpace)
          LastSpace = i;
        OutStr.insert(LastSpace, "\\l...");
        ColNum = i - LastSpace;
        LastSpace = 0;
        i += 3; // The loop will advance 'i' again.
      } else
        ++ColNum;
      if (OutStr[i] == ' ')
        LastSpace = i;
    }
    return OutStr;
  }

std::string getNodeLabel(const BasicBlock *Node, DOTFuncInfo *CFGInfo) {

if (isSimple())
      return getSimpleNodeLabel(Node, CFGInfo);
    else
      return getCompleteNodeLabel(Node, CFGInfo);
  }

static std::string getEdgeSourceLabel(const BasicBlock *Node,
                                        const_succ_iterator I) {
    // Label source of conditional branches with "T" or "F"
    if (const BranchInst *BI = dyn_cast<BranchInst>(Node->getTerminator()))
      if (BI->isConditional())
        return (I == succ_begin(Node)) ? "T" : "F";

// Label source of switch edges with the associated value.
    if (const SwitchInst *SI = dyn_cast<SwitchInst>(Node->getTerminator())) {
      unsigned SuccNo = I.getSuccessorIndex();

if (SuccNo == 0)
        return "def";

std::string Str;
      raw_string_ostream OS(Str);
      auto Case = *SwitchInst::ConstCaseIt::fromSuccessorIndex(SI, SuccNo);
      OS << Case.getCaseValue()->getValue();
      return OS.str();
    }
    return "";
  }

/// Display the raw branch weights from PGO.
  std::string getEdgeAttributes(const BasicBlock *Node, const_succ_iterator I,
                                DOTFuncInfo *CFGInfo) {
    if (!CFGInfo->showEdgeWeights())
      return "";

const Instruction *TI = Node->getTerminator();
    if (TI->getNumSuccessors() == 1)
      return "penwidth=2";

unsigned OpNo = I.getSuccessorIndex();

if (OpNo >= TI->getNumSuccessors())
      return "";

BasicBlock *SuccBB = TI->getSuccessor(OpNo);
    auto BranchProb = CFGInfo->getBPI()->getEdgeProbability(Node, SuccBB);
    double WeightPercent = ((double)BranchProb.getNumerator()) /
                           ((double)BranchProb.getDenominator());
    double Width = 1 + WeightPercent;

if (!CFGInfo->useRawEdgeWeights())
      return formatv("label=\"{0:P}\" penwidth={1}", WeightPercent, Width)
          .str();

// Prepend a 'W' to indicate that this is a weight rather than the actual
    // profile count (due to scaling).

uint64_t Freq = CFGInfo->getFreq(Node);
    std::string Attrs = formatv("label=\"W:{0}\" penwidth={1}",
                                (uint64_t)(Freq * WeightPercent), Width);
    if (Attrs.size())
      return Attrs;

MDNode *WeightsNode = TI->getMetadata(LLVMContext::MD_prof);
    if (!WeightsNode)
      return "";

MDString *MDName = cast<MDString>(WeightsNode->getOperand(0));
    if (MDName->getString() != "branch_weights")
      return "";

OpNo = I.getSuccessorIndex() + 1;
    if (OpNo >= WeightsNode->getNumOperands())
      return "";
    ConstantInt *Weight =
        mdconst::dyn_extract<ConstantInt>(WeightsNode->getOperand(OpNo));
    if (!Weight)
      return "";
    return ("label=\"W:" + std::to_string(Weight->getZExtValue()) +
            "\" penwidth=" + std::to_string(Width));
  }

std::string getNodeAttributes(const BasicBlock *Node, DOTFuncInfo *CFGInfo) {

if (!CFGInfo->showHeatColors())
      return "";

uint64_t Freq = CFGInfo->getFreq(Node);
    std::string Color = getHeatColor(Freq, CFGInfo->getMaxFreq());
    std::string EdgeColor = (Freq <= (CFGInfo->getMaxFreq() / 2))
                                ? (getHeatColor(0))
                                : (getHeatColor(1));

std::string Attrs = "color=\"" + EdgeColor + "ff\", style=filled," +
                        " fillcolor=\"" + Color + "70\"";
    return Attrs;
  }
  bool isNodeHidden(const BasicBlock *Node);
  void computeHiddenNodes(const Function *F);
};
} // End llvm namespace

namespace llvm {
class FunctionPass;
FunctionPass *createCFGPrinterLegacyPassPass();
FunctionPass *createCFGOnlyPrinterLegacyPassPass();
} // End llvm namespace

#endif

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Editing: CFGPrinter.h

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