1 //===- Printer.cpp - Code for printing data structure graphs nicely -------===//
3 // This file implements the 'dot' graph printer.
5 //===----------------------------------------------------------------------===//
7 #include "llvm/Analysis/DataStructure.h"
8 #include "llvm/Analysis/DSGraph.h"
9 #include "llvm/Analysis/DSGraphTraits.h"
10 #include "llvm/Module.h"
11 #include "llvm/Assembly/Writer.h"
12 #include "Support/CommandLine.h"
13 #include "Support/GraphWriter.h"
18 // OnlyPrintMain - The DataStructure printer exposes this option to allow
19 // printing of only the graph for "main".
21 static cl::opt<bool> OnlyPrintMain("only-print-main-ds", cl::ReallyHidden);
24 void DSNode::dump() const { print(std::cerr, 0); }
26 static string getCaption(const DSNode *N, const DSGraph *G) {
28 Module *M = G && &G->getFunction() ? G->getFunction().getParent() : 0;
30 if (N->isNodeCompletelyFolded())
33 WriteTypeSymbolic(OS, N->getType().Ty, M);
34 if (N->getType().isArray)
39 if (N->NodeType & DSNode::AllocaNode ) OS << "S";
40 if (N->NodeType & DSNode::HeapNode ) OS << "H";
41 if (N->NodeType & DSNode::GlobalNode ) OS << "G";
42 if (N->NodeType & DSNode::UnknownNode) OS << "U";
43 if (N->NodeType & DSNode::Incomplete ) OS << "I";
44 if (N->NodeType & DSNode::Modified ) OS << "M";
45 if (N->NodeType & DSNode::Read ) OS << "R";
49 for (unsigned i = 0, e = N->getGlobals().size(); i != e; ++i) {
50 WriteAsOperand(OS, N->getGlobals()[i], false, true, M);
58 struct DOTGraphTraits<const DSGraph*> : public DefaultDOTGraphTraits {
59 static std::string getGraphName(const DSGraph *G) {
61 return "Function " + G->getFunction().getName();
63 return "Non-function graph";
66 static const char *getGraphProperties(const DSGraph *G) {
67 return "\tedge [arrowtail=\"dot\"];\n"
68 "\tsize=\"10,7.5\";\n"
72 static std::string getNodeLabel(const DSNode *Node, const DSGraph *Graph) {
73 return getCaption(Node, Graph);
76 static std::string getNodeAttributes(const DSNode *N) {
77 return "shape=Mrecord";//fontname=Courier";
80 /// addCustomGraphFeatures - Use this graph writing hook to emit call nodes
81 /// and the return node.
83 static void addCustomGraphFeatures(const DSGraph *G,
84 GraphWriter<const DSGraph*> &GW) {
85 // Add scalar nodes to the graph...
86 const std::map<Value*, DSNodeHandle> &VM = G->getScalarMap();
87 for (std::map<Value*, DSNodeHandle>::const_iterator I = VM.begin();
89 if (!isa<GlobalValue>(I->first)) {
91 WriteAsOperand(OS, I->first, false, true, G->getFunction().getParent());
92 GW.emitSimpleNode(I->first, "plaintext=circle", OS.str());
94 // Add edge from return node to real destination
95 int EdgeDest = I->second.getOffset() >> DS::PointerShift;
96 if (EdgeDest == 0) EdgeDest = -1;
97 GW.emitEdge(I->first, -1, I->second.getNode(),
98 EdgeDest, "arrowtail=tee,color=gray63");
102 // Output the returned value pointer...
103 if (G->getRetNode().getNode() != 0) {
104 // Output the return node...
105 GW.emitSimpleNode((void*)1, "plaintext=circle", "returning");
107 // Add edge from return node to real destination
108 int RetEdgeDest = G->getRetNode().getOffset() >> DS::PointerShift;;
109 if (RetEdgeDest == 0) RetEdgeDest = -1;
110 GW.emitEdge((void*)1, -1, G->getRetNode().getNode(),
111 RetEdgeDest, "arrowtail=tee,color=gray63");
114 // Output all of the call nodes...
115 const std::vector<DSCallSite> &FCs = G->getFunctionCalls();
116 for (unsigned i = 0, e = FCs.size(); i != e; ++i) {
117 const DSCallSite &Call = FCs[i];
118 GW.emitSimpleNode(&Call, "shape=record", "call", Call.getNumPtrArgs()+2);
120 if (DSNode *N = Call.getRetVal().getNode()) {
121 int EdgeDest = Call.getRetVal().getOffset() >> DS::PointerShift;
122 if (EdgeDest == 0) EdgeDest = -1;
123 GW.emitEdge(&Call, 0, N, EdgeDest, "color=gray63");
125 if (DSNode *N = Call.getCallee().getNode()) {
126 int EdgeDest = Call.getCallee().getOffset() >> DS::PointerShift;
127 if (EdgeDest == 0) EdgeDest = -1;
128 GW.emitEdge(&Call, 1, N, EdgeDest, "color=gray63");
130 for (unsigned j = 0, e = Call.getNumPtrArgs(); j != e; ++j)
131 if (DSNode *N = Call.getPtrArg(j).getNode()) {
132 int EdgeDest = Call.getPtrArg(j).getOffset() >> DS::PointerShift;
133 if (EdgeDest == 0) EdgeDest = -1;
134 GW.emitEdge(&Call, j+2, N, EdgeDest, "color=gray63");
140 void DSNode::print(std::ostream &O, const DSGraph *G) const {
141 GraphWriter<const DSGraph *> W(O, G);
145 void DSGraph::print(std::ostream &O) const {
146 WriteGraph(O, this, "DataStructures");
149 void DSGraph::writeGraphToFile(std::ostream &O, const string &GraphName) const {
150 string Filename = GraphName + ".dot";
151 O << "Writing '" << Filename << "'...";
152 std::ofstream F(Filename.c_str());
156 O << " [" << getGraphSize() << "+" << getFunctionCalls().size() << "]\n";
158 O << " error opening file for writing!\n";
162 template <typename Collection>
163 static void printCollection(const Collection &C, std::ostream &O,
164 const Module *M, const string &Prefix) {
166 O << "Null Module pointer, cannot continue!\n";
170 unsigned TotalNumNodes = 0, TotalCallNodes = 0;
171 for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
172 if (!I->isExternal()) {
173 DSGraph &Gr = C.getDSGraph((Function&)*I);
174 TotalNumNodes += Gr.getGraphSize();
175 TotalCallNodes += Gr.getFunctionCalls().size();
176 if (I->getName() == "main" || !OnlyPrintMain)
177 Gr.writeGraphToFile(O, Prefix+I->getName());
179 O << "Skipped Writing '" << Prefix+I->getName() << ".dot'... ["
180 << Gr.getGraphSize() << "+" << Gr.getFunctionCalls().size() << "]\n";
184 DSGraph &GG = C.getGlobalsGraph();
185 TotalNumNodes += GG.getGraphSize();
186 TotalCallNodes += GG.getFunctionCalls().size();
187 if (!OnlyPrintMain) {
188 GG.writeGraphToFile(O, Prefix+"GlobalsGraph");
190 O << "Skipped Writing '" << Prefix << "GlobalsGraph.dot'... ["
191 << GG.getGraphSize() << "+" << GG.getFunctionCalls().size() << "]\n";
194 O << "\nGraphs contain [" << TotalNumNodes << "+" << TotalCallNodes
195 << "] nodes total" << std::endl;
199 // print - Print out the analysis results...
200 void LocalDataStructures::print(std::ostream &O, const Module *M) const {
201 printCollection(*this, O, M, "ds.");
204 void BUDataStructures::print(std::ostream &O, const Module *M) const {
205 printCollection(*this, O, M, "bu.");
208 void TDDataStructures::print(std::ostream &O, const Module *M) const {
209 printCollection(*this, O, M, "td.");