SelectionDAGPrinter.cpp revision 6e741f8842b5570e30f25912dbdaaa2edf36110c
1//===-- SelectionDAGPrinter.cpp - Implement SelectionDAG::viewGraph() -----===// 2// 3// The LLVM Compiler Infrastructure 4// 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. 7// 8//===----------------------------------------------------------------------===// 9// 10// This implements the SelectionDAG::viewGraph method. 11// 12//===----------------------------------------------------------------------===// 13 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" 19#include "llvm/Config/config.h" 20#include <fstream> 21using namespace llvm; 22 23namespace llvm { 24 template<> 25 struct DOTGraphTraits<SelectionDAG*> : public DefaultDOTGraphTraits { 26 static std::string getGraphName(const SelectionDAG *G) { 27 return G->getMachineFunction().getFunction()->getName(); 28 } 29 30 static bool renderGraphFromBottomUp() { 31 return true; 32 } 33 34 static std::string getNodeLabel(const SDNode *Node, 35 const SelectionDAG *Graph); 36 static std::string getNodeAttributes(const SDNode *N) { 37 return "shape=Mrecord"; 38 } 39 40 static void addCustomGraphFeatures(SelectionDAG *G, 41 GraphWriter<SelectionDAG*> &GW) { 42 GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot"); 43 GW.emitEdge(0, -1, G->getRoot().Val, -1, ""); 44 } 45 }; 46} 47 48std::string DOTGraphTraits<SelectionDAG*>::getNodeLabel(const SDNode *Node, 49 const SelectionDAG *G) { 50 std::string Op = Node->getOperationName(); 51 52 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i) { 53 switch (Node->getValueType(i)) { 54 default: Op += ":unknownvt!"; break; 55 case MVT::Other: Op += ":ch"; break; 56 case MVT::i1: Op += ":i1"; break; 57 case MVT::i8: Op += ":i8"; break; 58 case MVT::i16: Op += ":i16"; break; 59 case MVT::i32: Op += ":i32"; break; 60 case MVT::i64: Op += ":i64"; break; 61 case MVT::i128: Op += ":i128"; break; 62 case MVT::f32: Op += ":f32"; break; 63 case MVT::f64: Op += ":f64"; break; 64 case MVT::f80: Op += ":f80"; break; 65 case MVT::f128: Op += ":f128"; break; 66 case MVT::isVoid: Op += ":void"; break; 67 } 68 } 69 70 if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(Node)) { 71 Op += ": " + utostr(CSDN->getValue()); 72 } else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(Node)) { 73 Op += ": " + ftostr(CSDN->getValue()); 74 } else if (const GlobalAddressSDNode *GADN = 75 dyn_cast<GlobalAddressSDNode>(Node)) { 76 Op += ": " + GADN->getGlobal()->getName(); 77 } else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(Node)) { 78 Op += " " + itostr(FIDN->getIndex()); 79 } else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Node)){ 80 Op += "<" + utostr(CP->getIndex()) + ">"; 81 } else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(Node)) { 82 Op = "BB: "; 83 const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock(); 84 if (LBB) 85 Op += LBB->getName(); 86 //Op += " " + (const void*)BBDN->getBasicBlock(); 87 } else if (const RegSDNode *C2V = dyn_cast<RegSDNode>(Node)) { 88 Op += " #" + utostr(C2V->getReg()); 89 } else if (const ExternalSymbolSDNode *ES = 90 dyn_cast<ExternalSymbolSDNode>(Node)) { 91 Op += "'" + std::string(ES->getSymbol()) + "'"; 92 } else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(Node)) { 93 if (M->getValue()) 94 Op += "<" + M->getValue()->getName() + ":" + itostr(M->getOffset()) + ">"; 95 else 96 Op += "<null:" + itostr(M->getOffset()) + ">"; 97 } 98 return Op; 99} 100 101 102/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG 103/// rendered using 'dot'. 104/// 105void SelectionDAG::viewGraph() { 106// This code is only for debugging! 107#ifndef NDEBUG 108 std::string Filename = "/tmp/dag." + 109 getMachineFunction().getFunction()->getName() + ".dot"; 110 std::cerr << "Writing '" << Filename << "'... "; 111 std::ofstream F(Filename.c_str()); 112 113 if (!F) { 114 std::cerr << " error opening file for writing!\n"; 115 return; 116 } 117 118 WriteGraph(F, this); 119 F.close(); 120 std::cerr << "\n"; 121 122#ifdef HAVE_GRAPHVIZ 123 std::cerr << "Running 'Graphviz' program... " << std::flush; 124 if (system((LLVM_PATH_GRAPHVIZ " " + Filename).c_str())) { 125 std::cerr << "Error viewing graph: 'Graphviz' not in path?\n"; 126 } else { 127 return; 128 } 129#endif 130 131#ifdef HAVE_GV 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"; 136 } else { 137 std::cerr << "\n"; 138 system(LLVM_PATH_GV " /tmp/dag.tempgraph.ps"); 139 } 140 system(("rm " + Filename + " /tmp/dag.tempgraph.ps").c_str()); 141 return; 142#endif 143#endif 144 std::cerr << "SelectionDAG::viewGraph is only available in debug builds on " 145 << "systems with Graphviz or gv!\n"; 146} 147