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 21 using namespace llvm; 22 23 namespace llvm { 24 25 template <> 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 38 struct AnalysisCallGraphWrapperPassTraits { 39 static CallGraph *getGraph(CallGraphWrapperPass *P) { 40 return &P->getCallGraph(); 41 } 42 }; 43 44 } // end llvm namespace 45 46 namespace { 47 48 struct 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 61 struct 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 76 char CallGraphViewer::ID = 0; 77 INITIALIZE_PASS(CallGraphViewer, "view-callgraph", "View call graph", false, 78 false) 79 80 char CallGraphPrinter::ID = 0; 81 INITIALIZE_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 88 ModulePass *llvm::createCallGraphViewerPass() { return new CallGraphViewer(); } 89 90 ModulePass *llvm::createCallGraphPrinterPass() { 91 return new CallGraphPrinter(); 92 } 93
