1 //===-- SelectionDAGPrinter.cpp - Implement SelectionDAG::viewGraph() -----===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This implements the SelectionDAG::viewGraph method.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/SelectionDAG.h"
15 #include "llvm/CodeGen/MachineFunction.h"
16 #include "llvm/Function.h"
17 #include "llvm/Support/GraphWriter.h"
18 #include "llvm/ADT/StringExtras.h"
24 struct DOTGraphTraits<SelectionDAG*> : public DefaultDOTGraphTraits {
25 static std::string getGraphName(const SelectionDAG *G) {
26 return G->getMachineFunction().getFunction()->getName();
29 static bool renderGraphFromBottomUp() {
33 static std::string getNodeLabel(const SDNode *Node,
34 const SelectionDAG *Graph);
35 static std::string getNodeAttributes(const SDNode *N) {
36 return "shape=Mrecord";
39 static void addCustomGraphFeatures(SelectionDAG *G,
40 GraphWriter<SelectionDAG*> &GW) {
41 GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot");
42 GW.emitEdge(0, -1, G->getRoot().Val, -1, "");
47 std::string DOTGraphTraits<SelectionDAG*>::getNodeLabel(const SDNode *Node,
48 const SelectionDAG *G) {
49 std::string Op = Node->getOperationName();
51 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i) {
52 switch (Node->getValueType(i)) {
53 default: Op += ":unknownvt!"; break;
54 case MVT::Other: Op += ":ch"; break;
55 case MVT::i1: Op += ":i1"; break;
56 case MVT::i8: Op += ":i8"; break;
57 case MVT::i16: Op += ":i16"; break;
58 case MVT::i32: Op += ":i32"; break;
59 case MVT::i64: Op += ":i64"; break;
60 case MVT::i128: Op += ":i128"; break;
61 case MVT::f32: Op += ":f32"; break;
62 case MVT::f64: Op += ":f64"; break;
63 case MVT::f80: Op += ":f80"; break;
64 case MVT::f128: Op += ":f128"; break;
65 case MVT::isVoid: Op += ":void"; break;
69 if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(Node)) {
70 Op += ": " + utostr(CSDN->getValue());
71 } else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(Node)) {
72 Op += ": " + ftostr(CSDN->getValue());
73 } else if (const GlobalAddressSDNode *GADN =
74 dyn_cast<GlobalAddressSDNode>(Node)) {
75 Op += ": " + GADN->getGlobal()->getName();
76 } else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(Node)) {
77 Op += " " + itostr(FIDN->getIndex());
78 } else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Node)){
79 Op += "<" + utostr(CP->getIndex()) + ">";
80 } else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(Node)) {
82 const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock();
85 //Op += " " + (const void*)BBDN->getBasicBlock();
86 } else if (const RegSDNode *C2V = dyn_cast<RegSDNode>(Node)) {
87 Op += " #" + utostr(C2V->getReg());
88 } else if (const ExternalSymbolSDNode *ES =
89 dyn_cast<ExternalSymbolSDNode>(Node)) {
90 Op += "'" + std::string(ES->getSymbol()) + "'";
91 } else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(Node)) {
93 Op += "<" + M->getValue()->getName() + ":" + itostr(M->getOffset()) + ">";
95 Op += "<null:" + itostr(M->getOffset()) + ">";
101 /// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
102 /// rendered using 'dot'.
104 void SelectionDAG::viewGraph() {
105 // This code is only for debugging!
107 std::cerr << "SelectionDAG::viewGraph is only available in debug builds!\n";
109 std::string Filename = "/tmp/dag." +
110 getMachineFunction().getFunction()->getName() + ".dot";
111 std::cerr << "Writing '" << Filename << "'... ";
112 std::ofstream F(Filename.c_str());
115 std::cerr << " error opening file for writing!\n";
124 std::cerr << "Running 'Graphviz' program... " << std::flush;
125 if (system(("Graphviz " + Filename).c_str())) {
126 std::cerr << "Error viewing graph: 'Graphviz' not in path?\n";
132 std::cerr << "Running 'dot' program... " << std::flush;
133 if (system(("dot -Tps -Nfontname=Courier -Gsize=7.5,10 " + Filename
134 + " > /tmp/dag.tempgraph.ps").c_str())) {
135 std::cerr << "Error viewing graph: 'dot' not in path?\n";
138 system("gv /tmp/dag.tempgraph.ps");
140 system(("rm " + Filename + " /tmp/dag.tempgraph.ps").c_str());