1//===- CallPrinter.cpp - DOT printer for call graph -----------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines '-dot-callgraph', which emit a callgraph.<fnname>.dot 11// containing the call graph of a module. 12// 13// There is also a pass available to directly call dotty ('-view-callgraph'). 14// 15//===----------------------------------------------------------------------===// 16 17#include "llvm/Analysis/CallGraph.h" 18#include "llvm/Analysis/CallPrinter.h" 19#include "llvm/Analysis/DOTGraphTraitsPass.h" 20 21using namespace llvm; 22 23namespace llvm { 24 25template <> struct DOTGraphTraits<CallGraph *> : public DefaultDOTGraphTraits { 26 DOTGraphTraits(bool isSimple = false) : DefaultDOTGraphTraits(isSimple) {} 27 28 static std::string getGraphName(CallGraph *Graph) { return "Call graph"; } 29 30 std::string getNodeLabel(CallGraphNode *Node, CallGraph *Graph) { 31 if (Function *Func = Node->getFunction()) 32 return Func->getName(); 33 34 return "external node"; 35 } 36}; 37 38struct AnalysisCallGraphWrapperPassTraits { 39 static CallGraph *getGraph(CallGraphWrapperPass *P) { 40 return &P->getCallGraph(); 41 } 42}; 43 44} // end llvm namespace 45 46namespace { 47 48struct CallGraphViewer 49 : public DOTGraphTraitsModuleViewer<CallGraphWrapperPass, true, CallGraph *, 50 AnalysisCallGraphWrapperPassTraits> { 51 static char ID; 52 53 CallGraphViewer() 54 : DOTGraphTraitsModuleViewer<CallGraphWrapperPass, true, CallGraph *, 55 AnalysisCallGraphWrapperPassTraits>( 56 "callgraph", ID) { 57 initializeCallGraphViewerPass(*PassRegistry::getPassRegistry()); 58 } 59}; 60 61struct CallGraphPrinter : public DOTGraphTraitsModulePrinter< 62 CallGraphWrapperPass, true, CallGraph *, 63 AnalysisCallGraphWrapperPassTraits> { 64 static char ID; 65 66 CallGraphPrinter() 67 : DOTGraphTraitsModulePrinter<CallGraphWrapperPass, true, CallGraph *, 68 AnalysisCallGraphWrapperPassTraits>( 69 "callgraph", ID) { 70 initializeCallGraphPrinterPass(*PassRegistry::getPassRegistry()); 71 } 72}; 73 74} // end anonymous namespace 75 76char CallGraphViewer::ID = 0; 77INITIALIZE_PASS(CallGraphViewer, "view-callgraph", "View call graph", false, 78 false) 79 80char CallGraphPrinter::ID = 0; 81INITIALIZE_PASS(CallGraphPrinter, "dot-callgraph", 82 "Print call graph to 'dot' file", false, false) 83 84// Create methods available outside of this file, to use them 85// "include/llvm/LinkAllPasses.h". Otherwise the pass would be deleted by 86// the link time optimization. 87 88ModulePass *llvm::createCallGraphViewerPass() { return new CallGraphViewer(); } 89 90ModulePass *llvm::createCallGraphPrinterPass() { 91 return new CallGraphPrinter(); 92} 93