SelectionDAGPrinter.cpp revision a6fb1b6743ee1411accf2d6e636f73f2ee0a7f5b
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/Constants.h" 15#include "llvm/Function.h" 16#include "llvm/Assembly/Writer.h" 17#include "llvm/CodeGen/SelectionDAG.h" 18#include "llvm/CodeGen/ScheduleDAG.h" 19#include "llvm/CodeGen/MachineConstantPool.h" 20#include "llvm/CodeGen/MachineFunction.h" 21#include "llvm/Target/MRegisterInfo.h" 22#include "llvm/Target/TargetMachine.h" 23#include "llvm/Support/GraphWriter.h" 24#include "llvm/ADT/StringExtras.h" 25#include "llvm/Config/config.h" 26#include <fstream> 27#include <sstream> 28using namespace llvm; 29 30namespace llvm { 31 template<> 32 struct DOTGraphTraits<SelectionDAG*> : public DefaultDOTGraphTraits { 33 static std::string getGraphName(const SelectionDAG *G) { 34 return G->getMachineFunction().getFunction()->getName(); 35 } 36 37 static bool renderGraphFromBottomUp() { 38 return true; 39 } 40 41 static bool hasNodeAddressLabel(const SDNode *Node, 42 const SelectionDAG *Graph) { 43 return true; 44 } 45 46 /// If you want to override the dot attributes printed for a particular 47 /// edge, override this method. 48 template<typename EdgeIter> 49 static std::string getEdgeAttributes(const void *Node, EdgeIter EI) { 50 SDOperand Op = EI.getNode()->getOperand(EI.getOperand()); 51 MVT::ValueType VT = Op.getValueType(); 52 if (VT == MVT::Flag) 53 return "color=red,style=bold"; 54 else if (VT == MVT::Other) 55 return "color=blue,style=dashed"; 56 return ""; 57 } 58 59 60 static std::string getNodeLabel(const SDNode *Node, 61 const SelectionDAG *Graph); 62 static std::string getNodeAttributes(const SDNode *N, 63 const SelectionDAG *Graph) { 64#ifndef NDEBUG 65 const std::string &Attrs = Graph->getGraphAttrs(N); 66 if (!Attrs.empty()) { 67 if (Attrs.find("shape=") == std::string::npos) 68 return std::string("shape=Mrecord,") + Attrs; 69 else 70 return Attrs; 71 } 72#endif 73 return "shape=Mrecord"; 74 } 75 76 static void addCustomGraphFeatures(SelectionDAG *G, 77 GraphWriter<SelectionDAG*> &GW) { 78 GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot"); 79 if (G->getRoot().Val) 80 GW.emitEdge(0, -1, G->getRoot().Val, -1, ""); 81 } 82 }; 83} 84 85std::string DOTGraphTraits<SelectionDAG*>::getNodeLabel(const SDNode *Node, 86 const SelectionDAG *G) { 87 std::string Op = Node->getOperationName(G); 88 89 for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i) 90 if (Node->getValueType(i) == MVT::Other) 91 Op += ":ch"; 92 else 93 Op = Op + ":" + MVT::getValueTypeString(Node->getValueType(i)); 94 95 if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(Node)) { 96 Op += ": " + utostr(CSDN->getValue()); 97 } else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(Node)) { 98 Op += ": " + ftostr(CSDN->getValueAPF()); 99 } else if (const GlobalAddressSDNode *GADN = 100 dyn_cast<GlobalAddressSDNode>(Node)) { 101 int offset = GADN->getOffset(); 102 Op += ": " + GADN->getGlobal()->getName(); 103 if (offset > 0) 104 Op += "+" + itostr(offset); 105 else 106 Op += itostr(offset); 107 } else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(Node)) { 108 Op += " " + itostr(FIDN->getIndex()); 109 } else if (const JumpTableSDNode *JTDN = dyn_cast<JumpTableSDNode>(Node)) { 110 Op += " " + itostr(JTDN->getIndex()); 111 } else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Node)){ 112 if (CP->isMachineConstantPoolEntry()) { 113 std::ostringstream SS; 114 CP->getMachineCPVal()->print(SS); 115 Op += "<" + SS.str() + ">"; 116 } else { 117 if (ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal())) 118 Op += "<" + ftostr(CFP->getValueAPF()) + ">"; 119 else if (ConstantInt *CI = dyn_cast<ConstantInt>(CP->getConstVal())) 120 Op += "<" + utostr(CI->getZExtValue()) + ">"; 121 else { 122 std::ostringstream SS; 123 WriteAsOperand(SS, CP->getConstVal(), false); 124 Op += "<" + SS.str() + ">"; 125 } 126 } 127 } else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(Node)) { 128 Op = "BB: "; 129 const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock(); 130 if (LBB) 131 Op += LBB->getName(); 132 //Op += " " + (const void*)BBDN->getBasicBlock(); 133 } else if (const RegisterSDNode *R = dyn_cast<RegisterSDNode>(Node)) { 134 if (G && R->getReg() != 0 && 135 MRegisterInfo::isPhysicalRegister(R->getReg())) { 136 Op = Op + " " + G->getTarget().getRegisterInfo()->getName(R->getReg()); 137 } else { 138 Op += " #" + utostr(R->getReg()); 139 } 140 } else if (const ExternalSymbolSDNode *ES = 141 dyn_cast<ExternalSymbolSDNode>(Node)) { 142 Op += "'" + std::string(ES->getSymbol()) + "'"; 143 } else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(Node)) { 144 if (M->getValue()) 145 Op += "<" + M->getValue()->getName() + ":" + itostr(M->getOffset()) + ">"; 146 else 147 Op += "<null:" + itostr(M->getOffset()) + ">"; 148 } else if (const VTSDNode *N = dyn_cast<VTSDNode>(Node)) { 149 Op = Op + " VT=" + MVT::getValueTypeString(N->getVT()); 150 } else if (const StringSDNode *N = dyn_cast<StringSDNode>(Node)) { 151 Op = Op + "\"" + N->getValue() + "\""; 152 } else if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(Node)) { 153 bool doExt = true; 154 switch (LD->getExtensionType()) { 155 default: doExt = false; break; 156 case ISD::EXTLOAD: 157 Op = Op + "<anyext "; 158 break; 159 case ISD::SEXTLOAD: 160 Op = Op + " <sext "; 161 break; 162 case ISD::ZEXTLOAD: 163 Op = Op + " <zext "; 164 break; 165 } 166 if (doExt) 167 Op = Op + MVT::getValueTypeString(LD->getLoadedVT()) + ">"; 168 169 Op += LD->getIndexedModeName(LD->getAddressingMode()); 170 } else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(Node)) { 171 if (ST->isTruncatingStore()) 172 Op = Op + "<trunc " + MVT::getValueTypeString(ST->getStoredVT()) + ">"; 173 Op += ST->getIndexedModeName(ST->getAddressingMode()); 174 } 175 176 return Op; 177} 178 179 180/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG 181/// rendered using 'dot'. 182/// 183void SelectionDAG::viewGraph() { 184// This code is only for debugging! 185#ifndef NDEBUG 186 ViewGraph(this, "dag." + getMachineFunction().getFunction()->getName()); 187#else 188 cerr << "SelectionDAG::viewGraph is only available in debug builds on " 189 << "systems with Graphviz or gv!\n"; 190#endif // NDEBUG 191} 192 193 194/// clearGraphAttrs - Clear all previously defined node graph attributes. 195/// Intended to be used from a debugging tool (eg. gdb). 196void SelectionDAG::clearGraphAttrs() { 197#ifndef NDEBUG 198 NodeGraphAttrs.clear(); 199#else 200 cerr << "SelectionDAG::clearGraphAttrs is only available in debug builds" 201 << " on systems with Graphviz or gv!\n"; 202#endif 203} 204 205 206/// setGraphAttrs - Set graph attributes for a node. (eg. "color=red".) 207/// 208void SelectionDAG::setGraphAttrs(const SDNode *N, const char *Attrs) { 209#ifndef NDEBUG 210 NodeGraphAttrs[N] = Attrs; 211#else 212 cerr << "SelectionDAG::setGraphAttrs is only available in debug builds" 213 << " on systems with Graphviz or gv!\n"; 214#endif 215} 216 217 218/// getGraphAttrs - Get graph attributes for a node. (eg. "color=red".) 219/// Used from getNodeAttributes. 220const std::string SelectionDAG::getGraphAttrs(const SDNode *N) const { 221#ifndef NDEBUG 222 std::map<const SDNode *, std::string>::const_iterator I = 223 NodeGraphAttrs.find(N); 224 225 if (I != NodeGraphAttrs.end()) 226 return I->second; 227 else 228 return ""; 229#else 230 cerr << "SelectionDAG::getGraphAttrs is only available in debug builds" 231 << " on systems with Graphviz or gv!\n"; 232 return std::string(""); 233#endif 234} 235 236/// setGraphColor - Convenience for setting node color attribute. 237/// 238void SelectionDAG::setGraphColor(const SDNode *N, const char *Color) { 239#ifndef NDEBUG 240 NodeGraphAttrs[N] = std::string("color=") + Color; 241#else 242 cerr << "SelectionDAG::setGraphColor is only available in debug builds" 243 << " on systems with Graphviz or gv!\n"; 244#endif 245} 246 247namespace llvm { 248 template<> 249 struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits { 250 static std::string getGraphName(const ScheduleDAG *G) { 251 return DOTGraphTraits<SelectionDAG*>::getGraphName(&G->DAG); 252 } 253 254 static bool renderGraphFromBottomUp() { 255 return true; 256 } 257 258 static bool hasNodeAddressLabel(const SUnit *Node, 259 const ScheduleDAG *Graph) { 260 return true; 261 } 262 263 /// If you want to override the dot attributes printed for a particular 264 /// edge, override this method. 265 template<typename EdgeIter> 266 static std::string getEdgeAttributes(const void *Node, EdgeIter EI) { 267 if (EI.isCtrlDep()) 268 return "color=blue,style=dashed"; 269 return ""; 270 } 271 272 273 static std::string getNodeLabel(const SUnit *Node, 274 const ScheduleDAG *Graph); 275 static std::string getNodeAttributes(const SUnit *N, 276 const ScheduleDAG *Graph) { 277 return "shape=Mrecord"; 278 } 279 280 static void addCustomGraphFeatures(ScheduleDAG *G, 281 GraphWriter<ScheduleDAG*> &GW) { 282 GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot"); 283 if (G->DAG.getRoot().Val) 284 GW.emitEdge(0, -1, G->SUnitMap[G->DAG.getRoot().Val].front(), -1, ""); 285 } 286 }; 287} 288 289std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU, 290 const ScheduleDAG *G) { 291 std::string Op; 292 293 for (unsigned i = 0; i < SU->FlaggedNodes.size(); ++i) { 294 Op += DOTGraphTraits<SelectionDAG*>::getNodeLabel(SU->FlaggedNodes[i], 295 &G->DAG) + "\n"; 296 } 297 298 Op += DOTGraphTraits<SelectionDAG*>::getNodeLabel(SU->Node, &G->DAG); 299 300 return Op; 301} 302 303 304/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG 305/// rendered using 'dot'. 306/// 307void ScheduleDAG::viewGraph() { 308// This code is only for debugging! 309#ifndef NDEBUG 310 ViewGraph(this, "dag." + DAG.getMachineFunction().getFunction()->getName()); 311#else 312 cerr << "ScheduleDAG::viewGraph is only available in debug builds on " 313 << "systems with Graphviz or gv!\n"; 314#endif // NDEBUG 315} 316