1 //===- CallPrinter.cpp - DOT printer for call graph -----------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines '-dot-callgraph', which emit a callgraph.<fnname>.dot
11 // containing the call graph of a module.
13 // There is also a pass available to directly call dotty ('-view-callgraph').
15 //===----------------------------------------------------------------------===//
17 #include "llvm/Analysis/CallGraph.h"
18 #include "llvm/Analysis/CallPrinter.h"
19 #include "llvm/Analysis/DOTGraphTraitsPass.h"
25 template <> struct DOTGraphTraits<CallGraph *> : public DefaultDOTGraphTraits {
26 DOTGraphTraits(bool isSimple = false) : DefaultDOTGraphTraits(isSimple) {}
28 static std::string getGraphName(CallGraph *Graph) { return "Call graph"; }
30 std::string getNodeLabel(CallGraphNode *Node, CallGraph *Graph) {
31 if (Function *Func = Node->getFunction())
32 return Func->getName();
34 return "external node";
38 } // end llvm namespace
42 struct CallGraphViewer : public DOTGraphTraitsModuleViewer<CallGraph, true> {
46 : DOTGraphTraitsModuleViewer<CallGraph, true>("callgraph", ID) {
47 initializeCallGraphViewerPass(*PassRegistry::getPassRegistry());
51 struct CallGraphPrinter : public DOTGraphTraitsModulePrinter<CallGraph, true> {
55 : DOTGraphTraitsModulePrinter<CallGraph, true>("callgraph", ID) {
56 initializeCallGraphPrinterPass(*PassRegistry::getPassRegistry());
60 } // end anonymous namespace
62 char CallGraphViewer::ID = 0;
63 INITIALIZE_PASS(CallGraphViewer, "view-callgraph", "View call graph", false,
66 char CallGraphPrinter::ID = 0;
67 INITIALIZE_PASS(CallGraphPrinter, "dot-callgraph",
68 "Print call graph to 'dot' file", false, false)
70 // Create methods available outside of this file, to use them
71 // "include/llvm/LinkAllPasses.h". Otherwise the pass would be deleted by
72 // the link time optimization.
74 ModulePass *llvm::createCallGraphViewerPass() { return new CallGraphViewer(); }
76 ModulePass *llvm::createCallGraphPrinterPass() {
77 return new CallGraphPrinter();