#include "llvm/IR/CFG.h"
#include "llvm/IR/Constants.h"
+#include "llvm/IR/Module.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/PassManager.h"
+#include "llvm/Analysis/BlockFrequencyInfo.h"
+#include "llvm/Analysis/BranchProbabilityInfo.h"
+#include "llvm/Analysis/HeatUtils.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);
+ PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
};
class CFGOnlyViewerPass
: public PassInfoMixin<CFGOnlyViewerPass> {
public:
- PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+ PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
};
class CFGPrinterPass
: public PassInfoMixin<CFGPrinterPass> {
public:
- PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+ PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
};
class CFGOnlyPrinterPass
: public PassInfoMixin<CFGOnlyPrinterPass> {
public:
- PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+ PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
};
-template<>
-struct DOTGraphTraits<const Function*> : public DefaultDOTGraphTraits {
+class CFGDOTInfo {
+private:
+ const Function *F;
+ const BlockFrequencyInfo *BFI;
+ const BranchProbabilityInfo *BPI;
+ uint64_t MaxFreq;
+ bool ShowHeat;
+ bool Heuristic;
+ bool EdgeWeights;
+ bool RawWeights;
- DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
+public:
+ CFGDOTInfo(const Function *F) : CFGDOTInfo(F, nullptr, nullptr, 0) { }
+
+ CFGDOTInfo(const Function *F, const BlockFrequencyInfo *BFI,
+ BranchProbabilityInfo *BPI, uint64_t MaxFreq)
+ : F(F), BFI(BFI), BPI(BPI), MaxFreq(MaxFreq) {
+ ShowHeat = false;
+ Heuristic = true;
+ EdgeWeights = true;
+ RawWeights = true;
+ }
+
+ const BlockFrequencyInfo *getBFI() { return BFI; }
+
+ const BranchProbabilityInfo *getBPI() { return BPI; }
+
+ const Function *getFunction() { return this->F; }
+
+ uint64_t getMaxFreq() { return MaxFreq; }
- static std::string getGraphName(const Function *F) {
- return "CFG for '" + F->getName().str() + "' function";
+ uint64_t getFreq(const BasicBlock *BB) {
+ return getBlockFreq(BB, BFI, Heuristic);
}
- static std::string getSimpleNodeLabel(const BasicBlock *Node,
- const Function *) {
+ void setHeatColors(bool ShowHeat) { this->ShowHeat = ShowHeat; }
+
+ bool showHeatColors() { return ShowHeat; }
+
+ void setHeuristic(bool Heuristic) { this->Heuristic = Heuristic; }
+
+ bool useHeuristic() { return Heuristic; }
+
+ 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<CFGDOTInfo *> : public GraphTraits<const BasicBlock *> {
+ static NodeRef getEntryNode(CFGDOTInfo *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(CFGDOTInfo *CFGInfo) {
+ return nodes_iterator(CFGInfo->getFunction()->begin());
+ }
+
+ static nodes_iterator nodes_end(CFGDOTInfo *CFGInfo) {
+ return nodes_iterator(CFGInfo->getFunction()->end());
+ }
+
+ static size_t size(CFGDOTInfo *CFGInfo) { return CFGInfo->getFunction()->size(); }
+};
+
+template <> struct DOTGraphTraits<CFGDOTInfo *> : public DefaultDOTGraphTraits {
+
+ DOTGraphTraits(bool isSimple = false) : DefaultDOTGraphTraits(isSimple) {}
+
+ static std::string getGraphName(CFGDOTInfo *CFGInfo) {
+ return "CFG for '" + CFGInfo->getFunction()->getName().str() + "' function";
+ }
+
+ static std::string getSimpleNodeLabel(const BasicBlock *Node, CFGDOTInfo *) {
if (!Node->getName().empty())
return Node->getName().str();
}
static std::string getCompleteNodeLabel(const BasicBlock *Node,
- const Function *) {
+ CFGDOTInfo *) {
enum { MaxColumns = 80 };
std::string Str;
raw_string_ostream OS(Str);
return OutStr;
}
- std::string getNodeLabel(const BasicBlock *Node,
- const Function *Graph) {
+ std::string getNodeLabel(const BasicBlock *Node, CFGDOTInfo *CFGInfo) {
if (isSimple())
- return getSimpleNodeLabel(Node, Graph);
+ return getSimpleNodeLabel(Node, CFGInfo);
else
- return getCompleteNodeLabel(Node, Graph);
+ return getCompleteNodeLabel(Node, CFGInfo);
}
static std::string getEdgeSourceLabel(const BasicBlock *Node,
/// Display the raw branch weights from PGO.
std::string getEdgeAttributes(const BasicBlock *Node, succ_const_iterator I,
- const Function *F) {
+ CFGDOTInfo *CFGInfo) {
+
+ if (!CFGInfo->showEdgeWeights())
+ return "";
+
+ const unsigned MaxEdgeWidth = 2;
+
const TerminatorInst *TI = Node->getTerminator();
if (TI->getNumSuccessors() == 1)
- return "";
+ return "penwidth="+std::to_string(MaxEdgeWidth);
- MDNode *WeightsNode = TI->getMetadata(LLVMContext::MD_prof);
- if (!WeightsNode)
- return "";
+ unsigned OpNo = I.getSuccessorIndex();
- MDString *MDName = cast<MDString>(WeightsNode->getOperand(0));
- if (MDName->getString() != "branch_weights")
+ if (OpNo >= TI->getNumSuccessors())
return "";
- unsigned OpNo = I.getSuccessorIndex() + 1;
- if (OpNo >= WeightsNode->getNumOperands())
- return "";
- ConstantInt *Weight =
- mdconst::dyn_extract<ConstantInt>(WeightsNode->getOperand(OpNo));
- if (!Weight)
+ std::string Attrs = "";
+
+ BasicBlock *SuccBB = TI->getSuccessor(OpNo);
+ auto BranchProb = CFGInfo->getBPI()->getEdgeProbability(Node,SuccBB);
+ double WeightPercent = ((double)BranchProb.getNumerator()) /
+ ((double)BranchProb.getDenominator());
+ double Width = 1+(MaxEdgeWidth-1)*WeightPercent;
+
+ if (CFGInfo->useRawEdgeWeights()) {
+ // 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);
+ 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 Attrs;
+
+ MDString *MDName = cast<MDString>(WeightsNode->getOperand(0));
+ if (MDName->getString() != "branch_weights")
+ return Attrs;
+
+ unsigned OpNo = I.getSuccessorIndex() + 1;
+ if (OpNo >= WeightsNode->getNumOperands())
+ return Attrs;
+ ConstantInt *Weight =
+ mdconst::dyn_extract<ConstantInt>(WeightsNode->getOperand(OpNo));
+ if (!Weight)
+ return Attrs;
+
+ Attrs = "label=\"W:" + std::to_string(Weight->getZExtValue()) + "\" penwidth=" + std::to_string(Width);
+ } else {
+ //formatting value to percentage
+ Attrs = formatv("label=\"{0:P}\" penwidth={1}", WeightPercent, Width);
+ }
+ return Attrs;
+ }
+
+ std::string getNodeAttributes(const BasicBlock *Node, CFGDOTInfo *CFGInfo) {
+
+ if (!CFGInfo->showHeatColors())
return "";
- // Prepend a 'W' to indicate that this is a weight rather than the actual
- // profile count (due to scaling).
- Twine Attrs = "label=\"W:" + Twine(Weight->getZExtValue()) + "\"";
- return Attrs.str();
+ 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;
}
};
-} // End llvm namespace
+
+} // namespace llvm
namespace llvm {
- class FunctionPass;
- FunctionPass *createCFGPrinterLegacyPassPass ();
- FunctionPass *createCFGOnlyPrinterLegacyPassPass ();
-} // End llvm namespace
+class ModulePass;
+ModulePass *createCFGPrinterLegacyPassPass();
+ModulePass *createCFGOnlyPrinterLegacyPassPass();
+} // namespace llvm
#endif
--- /dev/null
+//===-- HeatUtils.h - Utility for printing heat colors ----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Utility for printing heat colors based on heuristics or profiling
+// information.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_HEATUTILS_H
+#define LLVM_ANALYSIS_HEATUTILS_H
+
+#include "llvm/Analysis/BlockFrequencyInfo.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/CallSite.h"
+
+#include <string>
+
+namespace llvm {
+
+bool hasProfiling(const Module &M);
+
+uint64_t getBlockFreq(const BasicBlock *BB, const BlockFrequencyInfo *BFI,
+ bool useHeuristic = true);
+
+uint64_t getNumOfCalls(Function &callerFunction, Function &calledFunction,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ bool useHeuristic = true);
+
+uint64_t getNumOfCalls(CallSite &callsite,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ bool useHeuristic = true);
+
+uint64_t getMaxFreq(const Function &F, const BlockFrequencyInfo *BFI,
+ bool useHeuristic = true);
+
+uint64_t getMaxFreq(Module &M,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ bool useHeuristic = true);
+
+std::string getHeatColor(uint64_t freq, uint64_t maxFreq);
+
+std::string getHeatColor(double percent);
+
+} // namespace llvm
+
+#endif
#include "llvm/Support/FileSystem.h"
using namespace llvm;
+static cl::opt<bool> CFGHeatPerFunction("cfg-heat-per-function",
+ cl::init(false), cl::Hidden,
+ cl::desc("Heat CFG per function"));
+
+static cl::opt<bool> ShowHeatColors("cfg-heat-colors", cl::init(true),
+ cl::Hidden,
+ cl::desc("Show heat colors in CFG"));
+
+static cl::opt<bool> UseRawEdgeWeight("cfg-raw-weights", cl::init(false),
+ cl::Hidden,
+ cl::desc("Use raw weights for labels. "
+ "Use percentages as default."));
+
+static cl::opt<bool> ShowEdgeWeight("cfg-weights", cl::init(true), cl::Hidden,
+ cl::desc("Show edges labeled with weights"));
+
+static void writeHeatCFGToDotFile(Function &F, BlockFrequencyInfo *BFI,
+ BranchProbabilityInfo *BPI, uint64_t MaxFreq,
+ bool UseHeuristic, bool isSimple) {
+ std::string Filename = ("cfg." + F.getName() + ".dot").str();
+ errs() << "Writing '" << Filename << "'...";
+
+ std::error_code EC;
+ raw_fd_ostream File(Filename, EC, sys::fs::F_Text);
+
+ CFGDOTInfo CFGInfo(&F, BFI, BPI, MaxFreq);
+ CFGInfo.setHeuristic(UseHeuristic);
+ CFGInfo.setHeatColors(ShowHeatColors);
+ CFGInfo.setEdgeWeights(ShowEdgeWeight);
+ CFGInfo.setRawEdgeWeights(UseRawEdgeWeight);
+
+ if (!EC)
+ WriteGraph(File, &CFGInfo, isSimple);
+ else
+ errs() << " error opening file for writing!";
+ errs() << "\n";
+}
+
+static void writeAllCFGsToDotFile(Module &M,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ function_ref<BranchProbabilityInfo *(Function &)> LookupBPI,
+ bool isSimple) {
+ bool UseHeuristic = true;
+ uint64_t MaxFreq = 0;
+ if (!CFGHeatPerFunction)
+ MaxFreq = getMaxFreq(M, LookupBFI, UseHeuristic);
+
+ for (auto &F : M) {
+ if (F.isDeclaration()) continue;
+ auto *BFI = LookupBFI(F);
+ auto *BPI = LookupBPI(F);
+ if (CFGHeatPerFunction)
+ MaxFreq = getMaxFreq(F, BFI, UseHeuristic);
+ writeHeatCFGToDotFile(F, BFI, BPI, MaxFreq, UseHeuristic, isSimple);
+ }
+
+}
+
+static void viewHeatCFG(Function &F, BlockFrequencyInfo *BFI,
+ BranchProbabilityInfo *BPI, uint64_t MaxFreq,
+ bool UseHeuristic, bool isSimple) {
+ CFGDOTInfo CFGInfo(&F, BFI, BPI, MaxFreq);
+ CFGInfo.setHeuristic(UseHeuristic);
+ CFGInfo.setHeatColors(ShowHeatColors);
+ CFGInfo.setEdgeWeights(ShowEdgeWeight);
+ CFGInfo.setRawEdgeWeights(UseRawEdgeWeight);
+
+ ViewGraph(&CFGInfo, "cfg." + F.getName(), isSimple);
+}
+
+static void viewAllCFGs(Module &M,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ function_ref<BranchProbabilityInfo *(Function &)> LookupBPI,
+ bool isSimple) {
+ bool UseHeuristic = true;
+ uint64_t MaxFreq = 0;
+ if (!CFGHeatPerFunction)
+ MaxFreq = getMaxFreq(M, LookupBFI, UseHeuristic);
+
+ for (auto &F : M) {
+ if (F.isDeclaration()) continue;
+ auto *BFI = LookupBFI(F);
+ auto *BPI = LookupBPI(F);
+ if (CFGHeatPerFunction)
+ MaxFreq = getMaxFreq(F, BFI, UseHeuristic);
+ viewHeatCFG(F, BFI, BPI, MaxFreq, UseHeuristic, isSimple);
+ }
+
+}
+
namespace {
- struct CFGViewerLegacyPass : public FunctionPass {
+ struct CFGViewerLegacyPass : public ModulePass {
static char ID; // Pass identifcation, replacement for typeid
- CFGViewerLegacyPass() : FunctionPass(ID) {
+ CFGViewerLegacyPass() : ModulePass(ID) {
initializeCFGViewerLegacyPassPass(*PassRegistry::getPassRegistry());
}
- bool runOnFunction(Function &F) override {
- F.viewCFG();
+ bool runOnModule(Module &M) override {
+ auto LookupBFI = [this](Function &F) {
+ return &this->getAnalysis<BlockFrequencyInfoWrapperPass>(F).getBFI();
+ };
+ auto LookupBPI = [this](Function &F) {
+ return &this->getAnalysis<BranchProbabilityInfoWrapperPass>(F).getBPI();
+ };
+ viewAllCFGs(M, LookupBFI, LookupBPI, /*isSimple=*/false);
return false;
}
- void print(raw_ostream &OS, const Module* = nullptr) const override {}
+ void print(raw_ostream &OS, const Module * = nullptr) const override {}
void getAnalysisUsage(AnalysisUsage &AU) const override {
+ ModulePass::getAnalysisUsage(AU);
+ AU.addRequired<BlockFrequencyInfoWrapperPass>();
+ AU.addRequired<BranchProbabilityInfoWrapperPass>();
AU.setPreservesAll();
}
+
};
}
char CFGViewerLegacyPass::ID = 0;
INITIALIZE_PASS(CFGViewerLegacyPass, "view-cfg", "View CFG of function", false, true)
-PreservedAnalyses CFGViewerPass::run(Function &F,
- FunctionAnalysisManager &AM) {
- F.viewCFG();
+PreservedAnalyses CFGViewerPass::run(Module &M,
+ ModuleAnalysisManager &AM) {
+ auto &FAM = AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
+ auto LookupBFI = [&FAM](Function &F) {
+ return &FAM.getResult<BlockFrequencyAnalysis>(F);
+ };
+ auto LookupBPI = [&FAM](Function &F) {
+ return &FAM.getResult<BranchProbabilityAnalysis>(F);
+ };
+ viewAllCFGs(M, LookupBFI, LookupBPI, /*isSimple=*/false);
return PreservedAnalyses::all();
}
namespace {
- struct CFGOnlyViewerLegacyPass : public FunctionPass {
+ struct CFGOnlyViewerLegacyPass : public ModulePass {
static char ID; // Pass identifcation, replacement for typeid
- CFGOnlyViewerLegacyPass() : FunctionPass(ID) {
+ CFGOnlyViewerLegacyPass() : ModulePass(ID) {
initializeCFGOnlyViewerLegacyPassPass(*PassRegistry::getPassRegistry());
}
- bool runOnFunction(Function &F) override {
- F.viewCFGOnly();
+ bool runOnModule(Module &M) override {
+ auto LookupBFI = [this](Function &F) {
+ return &this->getAnalysis<BlockFrequencyInfoWrapperPass>(F).getBFI();
+ };
+ auto LookupBPI = [this](Function &F) {
+ return &this->getAnalysis<BranchProbabilityInfoWrapperPass>(F).getBPI();
+ };
+ viewAllCFGs(M, LookupBFI, LookupBPI, /*isSimple=*/true);
return false;
}
- void print(raw_ostream &OS, const Module* = nullptr) const override {}
+ void print(raw_ostream &OS, const Module * = nullptr) const override {}
void getAnalysisUsage(AnalysisUsage &AU) const override {
+ ModulePass::getAnalysisUsage(AU);
+ AU.addRequired<BlockFrequencyInfoWrapperPass>();
+ AU.addRequired<BranchProbabilityInfoWrapperPass>();
AU.setPreservesAll();
}
+
};
}
INITIALIZE_PASS(CFGOnlyViewerLegacyPass, "view-cfg-only",
"View CFG of function (with no function bodies)", false, true)
-PreservedAnalyses CFGOnlyViewerPass::run(Function &F,
- FunctionAnalysisManager &AM) {
- F.viewCFGOnly();
+PreservedAnalyses CFGOnlyViewerPass::run(Module &M,
+ ModuleAnalysisManager &AM) {
+ auto &FAM = AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
+ auto LookupBFI = [&FAM](Function &F) {
+ return &FAM.getResult<BlockFrequencyAnalysis>(F);
+ };
+ auto LookupBPI = [&FAM](Function &F) {
+ return &FAM.getResult<BranchProbabilityAnalysis>(F);
+ };
+ viewAllCFGs(M, LookupBFI, LookupBPI, /*isSimple=*/true);
return PreservedAnalyses::all();
}
-static void writeCFGToDotFile(Function &F, bool CFGOnly = false) {
- std::string Filename = ("cfg." + F.getName() + ".dot").str();
- errs() << "Writing '" << Filename << "'...";
-
- std::error_code EC;
- raw_fd_ostream File(Filename, EC, sys::fs::F_Text);
-
- if (!EC)
- WriteGraph(File, (const Function*)&F, CFGOnly);
- else
- errs() << " error opening file for writing!";
- errs() << "\n";
-}
-
namespace {
- struct CFGPrinterLegacyPass : public FunctionPass {
+ struct CFGPrinterLegacyPass : public ModulePass {
static char ID; // Pass identification, replacement for typeid
- CFGPrinterLegacyPass() : FunctionPass(ID) {
+ CFGPrinterLegacyPass() : ModulePass(ID) {
initializeCFGPrinterLegacyPassPass(*PassRegistry::getPassRegistry());
}
- bool runOnFunction(Function &F) override {
- writeCFGToDotFile(F);
+ bool runOnModule(Module &M) override {
+ auto LookupBFI = [this](Function &F) {
+ return &this->getAnalysis<BlockFrequencyInfoWrapperPass>(F).getBFI();
+ };
+ auto LookupBPI = [this](Function &F) {
+ return &this->getAnalysis<BranchProbabilityInfoWrapperPass>(F).getBPI();
+ };
+ writeAllCFGsToDotFile(M, LookupBFI, LookupBPI, /*isSimple=*/false);
return false;
}
- void print(raw_ostream &OS, const Module* = nullptr) const override {}
+ void print(raw_ostream &OS, const Module * = nullptr) const override {}
void getAnalysisUsage(AnalysisUsage &AU) const override {
+ ModulePass::getAnalysisUsage(AU);
+ AU.addRequired<BlockFrequencyInfoWrapperPass>();
+ AU.addRequired<BranchProbabilityInfoWrapperPass>();
AU.setPreservesAll();
}
+
};
}
INITIALIZE_PASS(CFGPrinterLegacyPass, "dot-cfg", "Print CFG of function to 'dot' file",
false, true)
-PreservedAnalyses CFGPrinterPass::run(Function &F,
- FunctionAnalysisManager &AM) {
- writeCFGToDotFile(F);
+PreservedAnalyses CFGPrinterPass::run(Module &M,
+ ModuleAnalysisManager &AM) {
+ auto &FAM = AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
+ auto LookupBFI = [&FAM](Function &F) {
+ return &FAM.getResult<BlockFrequencyAnalysis>(F);
+ };
+ auto LookupBPI = [&FAM](Function &F) {
+ return &FAM.getResult<BranchProbabilityAnalysis>(F);
+ };
+ writeAllCFGsToDotFile(M, LookupBFI, LookupBPI, /*isSimple=*/false);
return PreservedAnalyses::all();
}
namespace {
- struct CFGOnlyPrinterLegacyPass : public FunctionPass {
+ struct CFGOnlyPrinterLegacyPass : public ModulePass {
static char ID; // Pass identification, replacement for typeid
- CFGOnlyPrinterLegacyPass() : FunctionPass(ID) {
+ CFGOnlyPrinterLegacyPass() : ModulePass(ID) {
initializeCFGOnlyPrinterLegacyPassPass(*PassRegistry::getPassRegistry());
}
- bool runOnFunction(Function &F) override {
- writeCFGToDotFile(F, /*CFGOnly=*/true);
+ bool runOnModule(Module &M) override {
+ auto LookupBFI = [this](Function &F) {
+ return &this->getAnalysis<BlockFrequencyInfoWrapperPass>(F).getBFI();
+ };
+ auto LookupBPI = [this](Function &F) {
+ return &this->getAnalysis<BranchProbabilityInfoWrapperPass>(F).getBPI();
+ };
+ writeAllCFGsToDotFile(M, LookupBFI, LookupBPI, /*isSimple=*/true);
return false;
}
- void print(raw_ostream &OS, const Module* = nullptr) const override {}
+
+ void print(raw_ostream &OS, const Module * = nullptr) const override {}
void getAnalysisUsage(AnalysisUsage &AU) const override {
+ ModulePass::getAnalysisUsage(AU);
+ AU.addRequired<BlockFrequencyInfoWrapperPass>();
+ AU.addRequired<BranchProbabilityInfoWrapperPass>();
AU.setPreservesAll();
}
+
};
}
"Print CFG of function to 'dot' file (with no function bodies)",
false, true)
-PreservedAnalyses CFGOnlyPrinterPass::run(Function &F,
- FunctionAnalysisManager &AM) {
- writeCFGToDotFile(F, /*CFGOnly=*/true);
+PreservedAnalyses CFGOnlyPrinterPass::run(Module &M,
+ ModuleAnalysisManager &AM) {
+ auto &FAM = AM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
+ auto LookupBFI = [&FAM](Function &F) {
+ return &FAM.getResult<BlockFrequencyAnalysis>(F);
+ };
+ auto LookupBPI = [&FAM](Function &F) {
+ return &FAM.getResult<BranchProbabilityAnalysis>(F);
+ };
+ writeAllCFGsToDotFile(M, LookupBFI, LookupBPI, /*isSimple=*/true);
return PreservedAnalyses::all();
}
/// being a 'dot' and 'gv' program in your path.
///
void Function::viewCFG() const {
- ViewGraph(this, "cfg" + getName());
+
+ CFGDOTInfo CFGInfo(this);
+ ViewGraph(&CFGInfo, "cfg" + getName());
}
/// viewCFGOnly - This function is meant for use from the debugger. It works
/// this can make the graph smaller.
///
void Function::viewCFGOnly() const {
- ViewGraph(this, "cfg" + getName(), true);
+
+ CFGDOTInfo CFGInfo(this);
+ ViewGraph(&CFGInfo, "cfg" + getName(), true);
}
-FunctionPass *llvm::createCFGPrinterLegacyPassPass () {
+ModulePass *llvm::createCFGPrinterLegacyPassPass() {
return new CFGPrinterLegacyPass();
}
-FunctionPass *llvm::createCFGOnlyPrinterLegacyPassPass () {
+ModulePass *llvm::createCFGOnlyPrinterLegacyPassPass() {
return new CFGOnlyPrinterLegacyPass();
}
-
BlockFrequencyInfoImpl.cpp
BranchProbabilityInfo.cpp
CFG.cpp
+ HeatUtils.cpp
CFGPrinter.cpp
CFLAndersAliasAnalysis.cpp
CFLSteensAliasAnalysis.cpp
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/CallPrinter.h"
+
+#include "llvm/Analysis/BlockFrequencyInfo.h"
+#include "llvm/Analysis/BranchProbabilityInfo.h"
#include "llvm/Analysis/CallGraph.h"
#include "llvm/Analysis/DOTGraphTraitsPass.h"
+#include "llvm/Analysis/HeatUtils.h"
+
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallSet.h"
using namespace llvm;
+static cl::opt<bool> ShowHeatColors("callgraph-heat-colors", cl::init(true),
+ cl::Hidden,
+ cl::desc("Show heat colors in call-graph"));
+
+static cl::opt<bool>
+ EstimateEdgeWeight("callgraph-weights", cl::init(false), cl::Hidden,
+ cl::desc("Show edges labeled with weights"));
+
+static cl::opt<bool>
+ FullCallGraph("callgraph-full", cl::init(false), cl::Hidden,
+ cl::desc("Show full call-graph (including external nodes)"));
+
+static cl::opt<bool> UseCallCounter(
+ "callgraph-call-count", cl::init(false), cl::Hidden,
+ cl::desc("Use function's call counter as a heat metric. "
+ "The default is the function's maximum block frequency."));
+
namespace llvm {
-template <> struct DOTGraphTraits<CallGraph *> : public DefaultDOTGraphTraits {
+class CallGraphDOTInfo {
+private:
+ Module *M;
+ CallGraph *CG;
+ DenseMap<const Function *, uint64_t> Freq;
+ uint64_t MaxFreq;
+ uint64_t MaxEdgeCount;
+
+public:
+ std::function<BlockFrequencyInfo *(Function &)> LookupBFI;
+
+ CallGraphDOTInfo(Module *M, CallGraph *CG,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI)
+ : M(M), CG(CG), LookupBFI(LookupBFI) {
+ MaxFreq = 0;
+ MaxEdgeCount = 0;
+
+ for (Function &F : *M) {
+ Freq[&F] = 0;
+
+ if (FullCallGraph) {
+ for (User *U : F.users()) {
+ auto CS = CallSite(U);
+ if (!CS.getCaller()->isDeclaration()) {
+ uint64_t Counter = getNumOfCalls(CS, LookupBFI);
+ if (Counter > MaxEdgeCount) {
+ MaxEdgeCount = Counter;
+ }
+ }
+ }
+ }
+
+ if (F.isDeclaration())
+ continue;
+ uint64_t localMaxFreq = 0;
+ if (UseCallCounter) {
+ Function::ProfileCount EntryCount = F.getEntryCount();
+ if (EntryCount.hasValue())
+ localMaxFreq = EntryCount.getCount();
+ } else {
+ localMaxFreq = llvm::getMaxFreq(F, LookupBFI(F));
+ }
+ if (localMaxFreq >= MaxFreq)
+ MaxFreq = localMaxFreq;
+ Freq[&F] = localMaxFreq;
+
+ if (!FullCallGraph) {
+ for (Function &Callee : *M) {
+ uint64_t Counter = getNumOfCalls(F, Callee, LookupBFI);
+ if (Counter > MaxEdgeCount) {
+ MaxEdgeCount = Counter;
+ }
+ }
+ }
+ }
+ if (!FullCallGraph)
+ removeParallelEdges();
+ }
+
+ Module *getModule() const { return M; }
+ CallGraph *getCallGraph() const { return CG; }
+
+ uint64_t getFreq(const Function *F) { return Freq[F]; }
+
+ uint64_t getMaxFreq() { return MaxFreq; }
+
+ uint64_t getMaxEdgeCount() { return MaxEdgeCount; }
+
+private:
+ void removeParallelEdges() {
+ for (auto &I : (*CG)) {
+ CallGraphNode *Node = I.second.get();
+
+ bool FoundParallelEdge = true;
+ while (FoundParallelEdge) {
+ SmallSet<Function *, 16> Visited;
+ FoundParallelEdge = false;
+ for (auto CI = Node->begin(), CE = Node->end(); CI != CE; CI++) {
+ if (!Visited.count(CI->second->getFunction()))
+ Visited.insert(CI->second->getFunction());
+ else {
+ FoundParallelEdge = true;
+ Node->removeCallEdge(CI);
+ break;
+ }
+ }
+ }
+ }
+ }
+};
+
+template <>
+struct GraphTraits<CallGraphDOTInfo *>
+ : public GraphTraits<const CallGraphNode *> {
+ static NodeRef getEntryNode(CallGraphDOTInfo *CGInfo) {
+ // Start at the external node!
+ return CGInfo->getCallGraph()->getExternalCallingNode();
+ }
+
+ typedef std::pair<const Function *const, std::unique_ptr<CallGraphNode>>
+ PairTy;
+ static const CallGraphNode *CGGetValuePtr(const PairTy &P) {
+ return P.second.get();
+ }
+
+ // nodes_iterator/begin/end - Allow iteration over all nodes in the graph
+ typedef mapped_iterator<CallGraph::const_iterator, decltype(&CGGetValuePtr)>
+ nodes_iterator;
+
+ static nodes_iterator nodes_begin(CallGraphDOTInfo *CGInfo) {
+ return nodes_iterator(CGInfo->getCallGraph()->begin(), &CGGetValuePtr);
+ }
+ static nodes_iterator nodes_end(CallGraphDOTInfo *CGInfo) {
+ return nodes_iterator(CGInfo->getCallGraph()->end(), &CGGetValuePtr);
+ }
+};
+
+template <>
+struct DOTGraphTraits<CallGraphDOTInfo *> : public DefaultDOTGraphTraits {
+
+ SmallSet<User *, 16> VisitedCallSites;
+
DOTGraphTraits(bool isSimple = false) : DefaultDOTGraphTraits(isSimple) {}
- static std::string getGraphName(CallGraph *Graph) { return "Call graph"; }
+ static std::string getGraphName(CallGraphDOTInfo *CGInfo) {
+ return "Call graph: " +
+ std::string(CGInfo->getModule()->getModuleIdentifier());
+ }
+
+ static bool isNodeHidden(const CallGraphNode *Node) {
+ if (FullCallGraph)
+ return false;
+
+ if (Node->getFunction())
+ return false;
+
+ return true;
+ }
+
+ std::string getNodeLabel(const CallGraphNode *Node,
+ CallGraphDOTInfo *CGInfo) {
+ if (Node == CGInfo->getCallGraph()->getExternalCallingNode())
+ return "external caller";
+
+ if (Node == CGInfo->getCallGraph()->getCallsExternalNode())
+ return "external callee";
- std::string getNodeLabel(CallGraphNode *Node, CallGraph *Graph) {
if (Function *Func = Node->getFunction())
return Func->getName();
return "external node";
}
-};
-struct AnalysisCallGraphWrapperPassTraits {
- static CallGraph *getGraph(CallGraphWrapperPass *P) {
- return &P->getCallGraph();
+ static const CallGraphNode *CGGetValuePtr(CallGraphNode::CallRecord P) {
+ return P.second;
+ }
+
+ // nodes_iterator/begin/end - Allow iteration over all nodes in the graph
+ typedef mapped_iterator<CallGraphNode::const_iterator,
+ decltype(&CGGetValuePtr)>
+ nodes_iterator;
+
+ std::string getEdgeAttributes(const CallGraphNode *Node, nodes_iterator I,
+ CallGraphDOTInfo *CGInfo) {
+ if (!EstimateEdgeWeight)
+ return "";
+
+ Function *Caller = Node->getFunction();
+ if (Caller == nullptr || Caller->isDeclaration())
+ return "";
+
+ Function *Callee = (*I)->getFunction();
+ if (Callee == nullptr)
+ return "";
+
+ uint64_t Counter = 0;
+ if (FullCallGraph) {
+ // looks for next call site between Caller and Callee
+ for (User *U : Callee->users()) {
+ auto CS = CallSite(U);
+ if (CS.getCaller() == Caller) {
+ if (VisitedCallSites.count(U))
+ continue;
+ VisitedCallSites.insert(U);
+ Counter = getNumOfCalls(CS, CGInfo->LookupBFI);
+ break;
+ }
+ }
+ } else {
+ Counter = getNumOfCalls(*Caller, *Callee, CGInfo->LookupBFI);
+ }
+
+ const unsigned MaxEdgeWidth = 3;
+
+ double Width =
+ 1 + (MaxEdgeWidth - 1) * (double(Counter) / CGInfo->getMaxEdgeCount());
+ std::string Attrs = "label=\"" + std::to_string(Counter) +
+ "\" penwidth=" + std::to_string(Width);
+
+ return Attrs;
+ }
+
+ std::string getNodeAttributes(const CallGraphNode *Node,
+ CallGraphDOTInfo *CGInfo) {
+ Function *F = Node->getFunction();
+ if (F == nullptr || F->isDeclaration())
+ return "";
+
+ std::string attrs = "";
+ if (ShowHeatColors) {
+ uint64_t freq = CGInfo->getFreq(F);
+ std::string color = getHeatColor(freq, CGInfo->getMaxFreq());
+ std::string edgeColor = (freq <= (CGInfo->getMaxFreq() / 2))
+ ? getHeatColor(0)
+ : getHeatColor(1);
+
+ attrs = "color=\"" + edgeColor + "ff\", style=filled, fillcolor=\"" +
+ color + "80\"";
+ }
+ return attrs;
}
};
-} // end llvm namespace
+} // namespace llvm
namespace {
-struct CallGraphViewer
- : public DOTGraphTraitsModuleViewer<CallGraphWrapperPass, true, CallGraph *,
- AnalysisCallGraphWrapperPassTraits> {
+// Viewer
+
+class CallGraphViewer : public ModulePass {
+public:
static char ID;
+ CallGraphViewer() : ModulePass(ID) {}
- CallGraphViewer()
- : DOTGraphTraitsModuleViewer<CallGraphWrapperPass, true, CallGraph *,
- AnalysisCallGraphWrapperPassTraits>(
- "callgraph", ID) {
- initializeCallGraphViewerPass(*PassRegistry::getPassRegistry());
- }
+ void getAnalysisUsage(AnalysisUsage &AU) const override;
+ bool runOnModule(Module &M) override;
};
-struct CallGraphDOTPrinter : public DOTGraphTraitsModulePrinter<
- CallGraphWrapperPass, true, CallGraph *,
- AnalysisCallGraphWrapperPassTraits> {
+void CallGraphViewer::getAnalysisUsage(AnalysisUsage &AU) const {
+ ModulePass::getAnalysisUsage(AU);
+ AU.addRequired<BlockFrequencyInfoWrapperPass>();
+ AU.setPreservesAll();
+}
+
+bool CallGraphViewer::runOnModule(Module &M) {
+ auto LookupBFI = [this](Function &F) {
+ return &this->getAnalysis<BlockFrequencyInfoWrapperPass>(F).getBFI();
+ };
+
+ CallGraph CG(M);
+ CallGraphDOTInfo CFGInfo(&M, &CG, LookupBFI);
+
+ std::string Title =
+ DOTGraphTraits<CallGraphDOTInfo *>::getGraphName(&CFGInfo);
+ ViewGraph(&CFGInfo, "callgraph", true, Title);
+
+ return false;
+}
+
+// DOT Printer
+
+class CallGraphDOTPrinter : public ModulePass {
+public:
static char ID;
+ CallGraphDOTPrinter() : ModulePass(ID) {}
- CallGraphDOTPrinter()
- : DOTGraphTraitsModulePrinter<CallGraphWrapperPass, true, CallGraph *,
- AnalysisCallGraphWrapperPassTraits>(
- "callgraph", ID) {
- initializeCallGraphDOTPrinterPass(*PassRegistry::getPassRegistry());
- }
+ void getAnalysisUsage(AnalysisUsage &AU) const override;
+ bool runOnModule(Module &M) override;
};
+void CallGraphDOTPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
+ ModulePass::getAnalysisUsage(AU);
+ AU.addRequired<BlockFrequencyInfoWrapperPass>();
+ AU.setPreservesAll();
+}
+
+bool CallGraphDOTPrinter::runOnModule(Module &M) {
+ auto LookupBFI = [this](Function &F) {
+ return &this->getAnalysis<BlockFrequencyInfoWrapperPass>(F).getBFI();
+ };
+
+ std::string Filename =
+ (std::string(M.getModuleIdentifier()) + ".callgraph.dot");
+ errs() << "Writing '" << Filename << "'...";
+
+ std::error_code EC;
+ raw_fd_ostream File(Filename, EC, sys::fs::F_Text);
+
+ CallGraph CG(M);
+ CallGraphDOTInfo CFGInfo(&M, &CG, LookupBFI);
+
+ if (!EC)
+ WriteGraph(File, &CFGInfo);
+ else
+ errs() << " error opening file for writing!";
+ errs() << "\n";
+
+ return false;
+}
+
} // end anonymous namespace
char CallGraphViewer::ID = 0;
if (!BB)
return "Post dominance root node";
-
if (isSimple())
- return DOTGraphTraits<const Function*>
- ::getSimpleNodeLabel(BB, BB->getParent());
+ return DOTGraphTraits<CFGDOTInfo*>
+ ::getSimpleNodeLabel(BB, nullptr);
else
- return DOTGraphTraits<const Function*>
- ::getCompleteNodeLabel(BB, BB->getParent());
+ return DOTGraphTraits<CFGDOTInfo*>
+ ::getCompleteNodeLabel(BB, nullptr);
}
};
--- /dev/null
+//===-- HeatUtils.cpp - Utility for printing heat colors --------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Utility for printing heat colors based on heuristics or profiling
+// information.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/HeatUtils.h"
+#include "llvm/IR/Instructions.h"
+
+namespace llvm {
+
+static const unsigned heatSize = 100;
+static const std::string heatPalette[heatSize] = {
+ "#3d50c3", "#4055c8", "#4358cb", "#465ecf", "#4961d2", "#4c66d6", "#4f69d9",
+ "#536edd", "#5572df", "#5977e3", "#5b7ae5", "#5f7fe8", "#6282ea", "#6687ed",
+ "#6a8bef", "#6c8ff1", "#7093f3", "#7396f5", "#779af7", "#7a9df8", "#7ea1fa",
+ "#81a4fb", "#85a8fc", "#88abfd", "#8caffe", "#8fb1fe", "#93b5fe", "#96b7ff",
+ "#9abbff", "#9ebeff", "#a1c0ff", "#a5c3fe", "#a7c5fe", "#abc8fd", "#aec9fc",
+ "#b2ccfb", "#b5cdfa", "#b9d0f9", "#bbd1f8", "#bfd3f6", "#c1d4f4", "#c5d6f2",
+ "#c7d7f0", "#cbd8ee", "#cedaeb", "#d1dae9", "#d4dbe6", "#d6dce4", "#d9dce1",
+ "#dbdcde", "#dedcdb", "#e0dbd8", "#e3d9d3", "#e5d8d1", "#e8d6cc", "#ead5c9",
+ "#ecd3c5", "#eed0c0", "#efcebd", "#f1ccb8", "#f2cab5", "#f3c7b1", "#f4c5ad",
+ "#f5c1a9", "#f6bfa6", "#f7bca1", "#f7b99e", "#f7b599", "#f7b396", "#f7af91",
+ "#f7ac8e", "#f7a889", "#f6a385", "#f5a081", "#f59c7d", "#f4987a", "#f39475",
+ "#f29072", "#f08b6e", "#ef886b", "#ed8366", "#ec7f63", "#e97a5f", "#e8765c",
+ "#e57058", "#e36c55", "#e16751", "#de614d", "#dc5d4a", "#d85646", "#d65244",
+ "#d24b40", "#d0473d", "#cc403a", "#ca3b37", "#c53334", "#c32e31", "#be242e",
+ "#bb1b2c", "#b70d28"};
+
+bool hasProfiling(const Module &M) {
+ for (auto &F : M) {
+ for (auto &BB : F) {
+ auto *TI = BB.getTerminator();
+ if (TI == nullptr)
+ continue;
+ if (TI->getMetadata(llvm::LLVMContext::MD_prof) != nullptr)
+ return true;
+ }
+ }
+ return false;
+}
+
+uint64_t getBlockFreq(const BasicBlock *BB, const BlockFrequencyInfo *BFI,
+ bool useHeuristic) {
+ uint64_t freqVal = 0;
+ if (!useHeuristic) {
+ Optional<uint64_t> freq = BFI->getBlockProfileCount(BB);
+ if (freq.hasValue())
+ freqVal = freq.getValue();
+ } else {
+ freqVal = BFI->getBlockFreq(BB).getFrequency();
+ }
+ return freqVal;
+}
+
+uint64_t getNumOfCalls(CallSite &CS,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ bool useHeuristic) {
+ if (CS.getInstruction()==nullptr) return 0;
+ if (CS.getInstruction()->getParent()==nullptr) return 0;
+ BasicBlock *BB = CS.getInstruction()->getParent();
+ return getBlockFreq(BB, LookupBFI(*CS.getCaller()));
+}
+
+uint64_t getNumOfCalls(Function &callerFunction, Function &calledFunction,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ bool useHeuristic) {
+ uint64_t counter = 0;
+ for (User *U : calledFunction.users()) {
+ if (isa<CallInst>(U)) {
+ auto CS = CallSite(U);
+ if (CS.getCaller() == (&callerFunction)) {
+ counter += getNumOfCalls(CS, LookupBFI);
+ }
+ }
+ }
+ return counter;
+}
+
+uint64_t getMaxFreq(const Function &F, const BlockFrequencyInfo *BFI,
+ bool useHeuristic) {
+ uint64_t maxFreq = 0;
+ for (const BasicBlock &BB : F) {
+ uint64_t freqVal = getBlockFreq(&BB, BFI, useHeuristic);
+ if (freqVal >= maxFreq)
+ maxFreq = freqVal;
+ }
+ return maxFreq;
+}
+
+uint64_t getMaxFreq(Module &M,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ bool useHeuristic) {
+ uint64_t maxFreq = 0;
+ for (auto &F : M) {
+ if (F.isDeclaration())
+ continue;
+ uint64_t localMaxFreq = getMaxFreq(F, LookupBFI(F), useHeuristic);
+ if (localMaxFreq >= maxFreq)
+ maxFreq = localMaxFreq;
+ }
+ return maxFreq;
+}
+
+std::string getHeatColor(uint64_t freq, uint64_t maxFreq) {
+ if (freq > maxFreq)
+ freq = maxFreq;
+ unsigned colorId =
+ unsigned(round((double(freq) / maxFreq) * (heatSize - 1.0)));
+ return heatPalette[colorId];
+}
+
+std::string getHeatColor(double percent) {
+ if (percent > 1.0)
+ percent = 1.0;
+ if (percent < 0.0)
+ percent = 0.0;
+ unsigned colorId = unsigned(round(percent * (heatSize - 1.0)));
+ return heatPalette[colorId];
+}
+
+} // namespace llvm
BasicBlock *BB = Node->getNodeAs<BasicBlock>();
if (isSimple())
- return DOTGraphTraits<const Function*>
- ::getSimpleNodeLabel(BB, BB->getParent());
+ return DOTGraphTraits<CFGDOTInfo*>
+ ::getSimpleNodeLabel(BB, nullptr);
else
- return DOTGraphTraits<const Function*>
- ::getCompleteNodeLabel(BB, BB->getParent());
+ return DOTGraphTraits<CFGDOTInfo*>
+ ::getCompleteNodeLabel(BB, nullptr);
}
return "Not implemented";
MODULE_PASS("constmerge", ConstantMergePass())
MODULE_PASS("cross-dso-cfi", CrossDSOCFIPass())
MODULE_PASS("deadargelim", DeadArgumentEliminationPass())
+MODULE_PASS("dot-cfg", CFGPrinterPass())
+MODULE_PASS("dot-cfg-only", CFGOnlyPrinterPass())
MODULE_PASS("elim-avail-extern", EliminateAvailableExternallyPass())
MODULE_PASS("forceattrs", ForceFunctionAttrsPass())
MODULE_PASS("function-import", FunctionImportPass())
MODULE_PASS("synthetic-counts-propagation", SyntheticCountsPropagation())
MODULE_PASS("wholeprogramdevirt", WholeProgramDevirtPass())
MODULE_PASS("verify", VerifierPass())
+MODULE_PASS("view-cfg", CFGViewerPass())
+MODULE_PASS("view-cfg-only", CFGOnlyViewerPass())
#undef MODULE_PASS
#ifndef CGSCC_ANALYSIS
FUNCTION_PASS("dce", DCEPass())
FUNCTION_PASS("div-rem-pairs", DivRemPairsPass())
FUNCTION_PASS("dse", DSEPass())
-FUNCTION_PASS("dot-cfg", CFGPrinterPass())
-FUNCTION_PASS("dot-cfg-only", CFGOnlyPrinterPass())
FUNCTION_PASS("early-cse", EarlyCSEPass(/*UseMemorySSA=*/false))
FUNCTION_PASS("early-cse-memssa", EarlyCSEPass(/*UseMemorySSA=*/true))
FUNCTION_PASS("ee-instrument", EntryExitInstrumenterPass(/*PostInlining=*/false))
FUNCTION_PASS("verify<loops>", LoopVerifierPass())
FUNCTION_PASS("verify<memoryssa>", MemorySSAVerifierPass())
FUNCTION_PASS("verify<regions>", RegionInfoVerifierPass())
-FUNCTION_PASS("view-cfg", CFGViewerPass())
-FUNCTION_PASS("view-cfg-only", CFGOnlyViewerPass())
#undef FUNCTION_PASS
#ifndef LOOP_ANALYSIS
#ifndef NDEBUG
static std::string getBlockName(const BasicBlock *B) {
- return DOTGraphTraits<const Function *>::getSimpleNodeLabel(B, nullptr);
+ return DOTGraphTraits<CFGDOTInfo *>::getSimpleNodeLabel(B, nullptr);
}
#endif
--- /dev/null
+//===-- HeatUtils.h - Utility for printing heat colors ----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Utility for printing heat colors based on heuristics or profiling
+// information.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_HEATUTILS_H
+#define LLVM_ANALYSIS_HEATUTILS_H
+
+#include "llvm/Analysis/BlockFrequencyInfo.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/CallSite.h"
+
+#include <string>
+
+namespace llvm {
+
+bool hasProfiling(const Module &M);
+
+uint64_t getBlockFreq(const BasicBlock *BB, const BlockFrequencyInfo *BFI,
+ bool useHeuristic = true);
+
+uint64_t getNumOfCalls(Function &callerFunction, Function &calledFunction,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ bool useHeuristic = true);
+
+uint64_t getNumOfCalls(CallSite &callsite,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ bool useHeuristic = true);
+
+uint64_t getMaxFreq(const Function &F, const BlockFrequencyInfo *BFI,
+ bool useHeuristic = true);
+
+uint64_t getMaxFreq(Module &M,
+ function_ref<BlockFrequencyInfo *(Function &)> LookupBFI,
+ bool useHeuristic = true);
+
+std::string getHeatColor(uint64_t freq, uint64_t maxFreq);
+
+std::string getHeatColor(double percent);
+
+} // namespace llvm
+
+#endif
;RUN: opt < %s -analyze -dot-cfg-only 2>/dev/null
;RUN: opt < %s -analyze -passes=dot-cfg-only 2>/dev/null
+;RUN: opt < %s -analyze -dot-cfg-only \
+;RUN: -cfg-heat-colors=true -cfg-weights=true 2>/dev/null
+;RUN: opt < %s -analyze -dot-cfg-only \
+;RUN: -cfg-heat-colors=false -cfg-weights=false 2>/dev/null
+;RUN: opt < %s -analyze -dot-cfg \
+;RUN: -cfg-heat-colors=true -cfg-weights=true 2>/dev/null
+;RUN: opt < %s -analyze -dot-cfg \
+;RUN: -cfg-heat-colors=false -cfg-weights=false 2>/dev/null
;PR 1497
define void @foo() {
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