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 {
DOTGraphTraitsllvm::DOTGraphTraits26 DOTGraphTraits(bool isSimple = false) : DefaultDOTGraphTraits(isSimple) {}
27
getGraphNamellvm::DOTGraphTraits28 static std::string getGraphName(CallGraph *Graph) { return "Call graph"; }
29
getNodeLabelllvm::DOTGraphTraits30 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 {
getGraphllvm::AnalysisCallGraphWrapperPassTraits39 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
CallGraphViewer__anon2d0e8b370111::CallGraphViewer53 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
CallGraphPrinter__anon2d0e8b370111::CallGraphPrinter66 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
createCallGraphViewerPass()88 ModulePass *llvm::createCallGraphViewerPass() { return new CallGraphViewer(); }
89
createCallGraphPrinterPass()90 ModulePass *llvm::createCallGraphPrinterPass() {
91 return new CallGraphPrinter();
92 }
93