SelectionDAGPrinter.cpp revision 9a4c92c2b43e51ac531e0dbc319855635a14f905
1//===-- SelectionDAGPrinter.cpp - Implement SelectionDAG::viewGraph() -----===// 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 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 += MVT::getValueTypeString(LD->getMemoryVT()) + ">"; 168 if (LD->isVolatile()) 169 Op += "<V>"; 170 Op += LD->getIndexedModeName(LD->getAddressingMode()); 171 if (LD->getAlignment() > 1) 172 Op += " A=" + utostr(LD->getAlignment()); 173 } else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(Node)) { 174 if (ST->isTruncatingStore()) 175 Op += "<trunc " + MVT::getValueTypeString(ST->getMemoryVT()) + ">"; 176 if (ST->isVolatile()) 177 Op += "<V>"; 178 Op += ST->getIndexedModeName(ST->getAddressingMode()); 179 if (ST->getAlignment() > 1) 180 Op += " A=" + utostr(ST->getAlignment()); 181 } 182 183#if 0 184 Op += " Id=" + itostr(Node->getNodeId()); 185#endif 186 187 return Op; 188} 189 190 191/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG 192/// rendered using 'dot'. 193/// 194void SelectionDAG::viewGraph() { 195// This code is only for debugging! 196#ifndef NDEBUG 197 ViewGraph(this, "dag." + getMachineFunction().getFunction()->getName()); 198#else 199 cerr << "SelectionDAG::viewGraph is only available in debug builds on " 200 << "systems with Graphviz or gv!\n"; 201#endif // NDEBUG 202} 203 204 205/// clearGraphAttrs - Clear all previously defined node graph attributes. 206/// Intended to be used from a debugging tool (eg. gdb). 207void SelectionDAG::clearGraphAttrs() { 208#ifndef NDEBUG 209 NodeGraphAttrs.clear(); 210#else 211 cerr << "SelectionDAG::clearGraphAttrs is only available in debug builds" 212 << " on systems with Graphviz or gv!\n"; 213#endif 214} 215 216 217/// setGraphAttrs - Set graph attributes for a node. (eg. "color=red".) 218/// 219void SelectionDAG::setGraphAttrs(const SDNode *N, const char *Attrs) { 220#ifndef NDEBUG 221 NodeGraphAttrs[N] = Attrs; 222#else 223 cerr << "SelectionDAG::setGraphAttrs is only available in debug builds" 224 << " on systems with Graphviz or gv!\n"; 225#endif 226} 227 228 229/// getGraphAttrs - Get graph attributes for a node. (eg. "color=red".) 230/// Used from getNodeAttributes. 231const std::string SelectionDAG::getGraphAttrs(const SDNode *N) const { 232#ifndef NDEBUG 233 std::map<const SDNode *, std::string>::const_iterator I = 234 NodeGraphAttrs.find(N); 235 236 if (I != NodeGraphAttrs.end()) 237 return I->second; 238 else 239 return ""; 240#else 241 cerr << "SelectionDAG::getGraphAttrs is only available in debug builds" 242 << " on systems with Graphviz or gv!\n"; 243 return std::string(""); 244#endif 245} 246 247/// setGraphColor - Convenience for setting node color attribute. 248/// 249void SelectionDAG::setGraphColor(const SDNode *N, const char *Color) { 250#ifndef NDEBUG 251 NodeGraphAttrs[N] = std::string("color=") + Color; 252#else 253 cerr << "SelectionDAG::setGraphColor is only available in debug builds" 254 << " on systems with Graphviz or gv!\n"; 255#endif 256} 257 258namespace llvm { 259 template<> 260 struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits { 261 static std::string getGraphName(const ScheduleDAG *G) { 262 return DOTGraphTraits<SelectionDAG*>::getGraphName(&G->DAG); 263 } 264 265 static bool renderGraphFromBottomUp() { 266 return true; 267 } 268 269 static bool hasNodeAddressLabel(const SUnit *Node, 270 const ScheduleDAG *Graph) { 271 return true; 272 } 273 274 /// If you want to override the dot attributes printed for a particular 275 /// edge, override this method. 276 template<typename EdgeIter> 277 static std::string getEdgeAttributes(const void *Node, EdgeIter EI) { 278 if (EI.isCtrlDep()) 279 return "color=blue,style=dashed"; 280 return ""; 281 } 282 283 284 static std::string getNodeLabel(const SUnit *Node, 285 const ScheduleDAG *Graph); 286 static std::string getNodeAttributes(const SUnit *N, 287 const ScheduleDAG *Graph) { 288 return "shape=Mrecord"; 289 } 290 291 static void addCustomGraphFeatures(ScheduleDAG *G, 292 GraphWriter<ScheduleDAG*> &GW) { 293 GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot"); 294 if (G->DAG.getRoot().Val) 295 GW.emitEdge(0, -1, G->SUnitMap[G->DAG.getRoot().Val].front(), -1, ""); 296 } 297 }; 298} 299 300std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU, 301 const ScheduleDAG *G) { 302 std::string Op; 303 304 for (unsigned i = 0; i < SU->FlaggedNodes.size(); ++i) { 305 Op += DOTGraphTraits<SelectionDAG*>::getNodeLabel(SU->FlaggedNodes[i], 306 &G->DAG) + "\n"; 307 } 308 309 Op += DOTGraphTraits<SelectionDAG*>::getNodeLabel(SU->Node, &G->DAG); 310 311 return Op; 312} 313 314 315/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG 316/// rendered using 'dot'. 317/// 318void ScheduleDAG::viewGraph() { 319// This code is only for debugging! 320#ifndef NDEBUG 321 ViewGraph(this, "dag." + DAG.getMachineFunction().getFunction()->getName()); 322#else 323 cerr << "ScheduleDAG::viewGraph is only available in debug builds on " 324 << "systems with Graphviz or gv!\n"; 325#endif // NDEBUG 326} 327