SelectionDAGPrinter.cpp revision 276dcbdc8db6614cfd5004dc7dc35e437ddf9c58
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/TargetRegisterInfo.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 TargetRegisterInfo::isPhysicalRegister(R->getReg())) { 136 Op = Op + " " + 137 G->getTarget().getRegisterInfo()->getName(R->getReg()); 138 } else { 139 Op += " #" + utostr(R->getReg()); 140 } 141 } else if (const ExternalSymbolSDNode *ES = 142 dyn_cast<ExternalSymbolSDNode>(Node)) { 143 Op += "'" + std::string(ES->getSymbol()) + "'"; 144 } else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(Node)) { 145 if (M->getValue()) 146 Op += "<" + M->getValue()->getName() + ">"; 147 else 148 Op += "<null>"; 149 } else if (const MemOperandSDNode *M = dyn_cast<MemOperandSDNode>(Node)) { 150 if (M->MO.getValue()) 151 Op += "<" + M->MO.getValue()->getName() + ":" + itostr(M->MO.getOffset()) + ">"; 152 else 153 Op += "<null:" + itostr(M->MO.getOffset()) + ">"; 154 } else if (const ARG_FLAGSSDNode *N = dyn_cast<ARG_FLAGSSDNode>(Node)) { 155 Op = Op + " AF=" + N->getArgFlags().getArgFlagsString(); 156 } else if (const VTSDNode *N = dyn_cast<VTSDNode>(Node)) { 157 Op = Op + " VT=" + MVT::getValueTypeString(N->getVT()); 158 } else if (const StringSDNode *N = dyn_cast<StringSDNode>(Node)) { 159 Op = Op + "\"" + N->getValue() + "\""; 160 } else if (const LoadSDNode *LD = dyn_cast<LoadSDNode>(Node)) { 161 bool doExt = true; 162 switch (LD->getExtensionType()) { 163 default: doExt = false; break; 164 case ISD::EXTLOAD: 165 Op = Op + "<anyext "; 166 break; 167 case ISD::SEXTLOAD: 168 Op = Op + " <sext "; 169 break; 170 case ISD::ZEXTLOAD: 171 Op = Op + " <zext "; 172 break; 173 } 174 if (doExt) 175 Op += MVT::getValueTypeString(LD->getMemoryVT()) + ">"; 176 if (LD->isVolatile()) 177 Op += "<V>"; 178 Op += LD->getIndexedModeName(LD->getAddressingMode()); 179 if (LD->getAlignment() > 1) 180 Op += " A=" + utostr(LD->getAlignment()); 181 } else if (const StoreSDNode *ST = dyn_cast<StoreSDNode>(Node)) { 182 if (ST->isTruncatingStore()) 183 Op += "<trunc " + MVT::getValueTypeString(ST->getMemoryVT()) + ">"; 184 if (ST->isVolatile()) 185 Op += "<V>"; 186 Op += ST->getIndexedModeName(ST->getAddressingMode()); 187 if (ST->getAlignment() > 1) 188 Op += " A=" + utostr(ST->getAlignment()); 189 } 190 191#if 0 192 Op += " Id=" + itostr(Node->getNodeId()); 193#endif 194 195 return Op; 196} 197 198 199/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG 200/// rendered using 'dot'. 201/// 202void SelectionDAG::viewGraph() { 203// This code is only for debugging! 204#ifndef NDEBUG 205 ViewGraph(this, "dag." + getMachineFunction().getFunction()->getName()); 206#else 207 cerr << "SelectionDAG::viewGraph is only available in debug builds on " 208 << "systems with Graphviz or gv!\n"; 209#endif // NDEBUG 210} 211 212 213/// clearGraphAttrs - Clear all previously defined node graph attributes. 214/// Intended to be used from a debugging tool (eg. gdb). 215void SelectionDAG::clearGraphAttrs() { 216#ifndef NDEBUG 217 NodeGraphAttrs.clear(); 218#else 219 cerr << "SelectionDAG::clearGraphAttrs is only available in debug builds" 220 << " on systems with Graphviz or gv!\n"; 221#endif 222} 223 224 225/// setGraphAttrs - Set graph attributes for a node. (eg. "color=red".) 226/// 227void SelectionDAG::setGraphAttrs(const SDNode *N, const char *Attrs) { 228#ifndef NDEBUG 229 NodeGraphAttrs[N] = Attrs; 230#else 231 cerr << "SelectionDAG::setGraphAttrs is only available in debug builds" 232 << " on systems with Graphviz or gv!\n"; 233#endif 234} 235 236 237/// getGraphAttrs - Get graph attributes for a node. (eg. "color=red".) 238/// Used from getNodeAttributes. 239const std::string SelectionDAG::getGraphAttrs(const SDNode *N) const { 240#ifndef NDEBUG 241 std::map<const SDNode *, std::string>::const_iterator I = 242 NodeGraphAttrs.find(N); 243 244 if (I != NodeGraphAttrs.end()) 245 return I->second; 246 else 247 return ""; 248#else 249 cerr << "SelectionDAG::getGraphAttrs is only available in debug builds" 250 << " on systems with Graphviz or gv!\n"; 251 return std::string(""); 252#endif 253} 254 255/// setGraphColor - Convenience for setting node color attribute. 256/// 257void SelectionDAG::setGraphColor(const SDNode *N, const char *Color) { 258#ifndef NDEBUG 259 NodeGraphAttrs[N] = std::string("color=") + Color; 260#else 261 cerr << "SelectionDAG::setGraphColor is only available in debug builds" 262 << " on systems with Graphviz or gv!\n"; 263#endif 264} 265 266namespace llvm { 267 template<> 268 struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits { 269 static std::string getGraphName(const ScheduleDAG *G) { 270 return DOTGraphTraits<SelectionDAG*>::getGraphName(&G->DAG); 271 } 272 273 static bool renderGraphFromBottomUp() { 274 return true; 275 } 276 277 static bool hasNodeAddressLabel(const SUnit *Node, 278 const ScheduleDAG *Graph) { 279 return true; 280 } 281 282 /// If you want to override the dot attributes printed for a particular 283 /// edge, override this method. 284 template<typename EdgeIter> 285 static std::string getEdgeAttributes(const void *Node, EdgeIter EI) { 286 if (EI.isCtrlDep()) 287 return "color=blue,style=dashed"; 288 return ""; 289 } 290 291 292 static std::string getNodeLabel(const SUnit *Node, 293 const ScheduleDAG *Graph); 294 static std::string getNodeAttributes(const SUnit *N, 295 const ScheduleDAG *Graph) { 296 return "shape=Mrecord"; 297 } 298 299 static void addCustomGraphFeatures(ScheduleDAG *G, 300 GraphWriter<ScheduleDAG*> &GW) { 301 GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot"); 302 if (G->DAG.getRoot().Val) 303 GW.emitEdge(0, -1, G->SUnitMap[G->DAG.getRoot().Val].front(), -1, ""); 304 } 305 }; 306} 307 308std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU, 309 const ScheduleDAG *G) { 310 std::string Op; 311 312 for (unsigned i = 0; i < SU->FlaggedNodes.size(); ++i) { 313 Op += DOTGraphTraits<SelectionDAG*>::getNodeLabel(SU->FlaggedNodes[i], 314 &G->DAG) + "\n"; 315 } 316 317 Op += DOTGraphTraits<SelectionDAG*>::getNodeLabel(SU->Node, &G->DAG); 318 319 return Op; 320} 321 322 323/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG 324/// rendered using 'dot'. 325/// 326void ScheduleDAG::viewGraph() { 327// This code is only for debugging! 328#ifndef NDEBUG 329 ViewGraph(this, "dag." + DAG.getMachineFunction().getFunction()->getName()); 330#else 331 cerr << "ScheduleDAG::viewGraph is only available in debug builds on " 332 << "systems with Graphviz or gv!\n"; 333#endif // NDEBUG 334} 335