SelectionDAGPrinter.cpp revision 4ee451de366474b9c228b4e5fa573795a715216d
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 = 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#if 0 177 Op += " Id=" + itostr(Node->getNodeId()); 178#endif 179 180 return Op; 181} 182 183 184/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG 185/// rendered using 'dot'. 186/// 187void SelectionDAG::viewGraph() { 188// This code is only for debugging! 189#ifndef NDEBUG 190 ViewGraph(this, "dag." + getMachineFunction().getFunction()->getName()); 191#else 192 cerr << "SelectionDAG::viewGraph is only available in debug builds on " 193 << "systems with Graphviz or gv!\n"; 194#endif // NDEBUG 195} 196 197 198/// clearGraphAttrs - Clear all previously defined node graph attributes. 199/// Intended to be used from a debugging tool (eg. gdb). 200void SelectionDAG::clearGraphAttrs() { 201#ifndef NDEBUG 202 NodeGraphAttrs.clear(); 203#else 204 cerr << "SelectionDAG::clearGraphAttrs is only available in debug builds" 205 << " on systems with Graphviz or gv!\n"; 206#endif 207} 208 209 210/// setGraphAttrs - Set graph attributes for a node. (eg. "color=red".) 211/// 212void SelectionDAG::setGraphAttrs(const SDNode *N, const char *Attrs) { 213#ifndef NDEBUG 214 NodeGraphAttrs[N] = Attrs; 215#else 216 cerr << "SelectionDAG::setGraphAttrs is only available in debug builds" 217 << " on systems with Graphviz or gv!\n"; 218#endif 219} 220 221 222/// getGraphAttrs - Get graph attributes for a node. (eg. "color=red".) 223/// Used from getNodeAttributes. 224const std::string SelectionDAG::getGraphAttrs(const SDNode *N) const { 225#ifndef NDEBUG 226 std::map<const SDNode *, std::string>::const_iterator I = 227 NodeGraphAttrs.find(N); 228 229 if (I != NodeGraphAttrs.end()) 230 return I->second; 231 else 232 return ""; 233#else 234 cerr << "SelectionDAG::getGraphAttrs is only available in debug builds" 235 << " on systems with Graphviz or gv!\n"; 236 return std::string(""); 237#endif 238} 239 240/// setGraphColor - Convenience for setting node color attribute. 241/// 242void SelectionDAG::setGraphColor(const SDNode *N, const char *Color) { 243#ifndef NDEBUG 244 NodeGraphAttrs[N] = std::string("color=") + Color; 245#else 246 cerr << "SelectionDAG::setGraphColor is only available in debug builds" 247 << " on systems with Graphviz or gv!\n"; 248#endif 249} 250 251namespace llvm { 252 template<> 253 struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits { 254 static std::string getGraphName(const ScheduleDAG *G) { 255 return DOTGraphTraits<SelectionDAG*>::getGraphName(&G->DAG); 256 } 257 258 static bool renderGraphFromBottomUp() { 259 return true; 260 } 261 262 static bool hasNodeAddressLabel(const SUnit *Node, 263 const ScheduleDAG *Graph) { 264 return true; 265 } 266 267 /// If you want to override the dot attributes printed for a particular 268 /// edge, override this method. 269 template<typename EdgeIter> 270 static std::string getEdgeAttributes(const void *Node, EdgeIter EI) { 271 if (EI.isCtrlDep()) 272 return "color=blue,style=dashed"; 273 return ""; 274 } 275 276 277 static std::string getNodeLabel(const SUnit *Node, 278 const ScheduleDAG *Graph); 279 static std::string getNodeAttributes(const SUnit *N, 280 const ScheduleDAG *Graph) { 281 return "shape=Mrecord"; 282 } 283 284 static void addCustomGraphFeatures(ScheduleDAG *G, 285 GraphWriter<ScheduleDAG*> &GW) { 286 GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot"); 287 if (G->DAG.getRoot().Val) 288 GW.emitEdge(0, -1, G->SUnitMap[G->DAG.getRoot().Val].front(), -1, ""); 289 } 290 }; 291} 292 293std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU, 294 const ScheduleDAG *G) { 295 std::string Op; 296 297 for (unsigned i = 0; i < SU->FlaggedNodes.size(); ++i) { 298 Op += DOTGraphTraits<SelectionDAG*>::getNodeLabel(SU->FlaggedNodes[i], 299 &G->DAG) + "\n"; 300 } 301 302 Op += DOTGraphTraits<SelectionDAG*>::getNodeLabel(SU->Node, &G->DAG); 303 304 return Op; 305} 306 307 308/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG 309/// rendered using 'dot'. 310/// 311void ScheduleDAG::viewGraph() { 312// This code is only for debugging! 313#ifndef NDEBUG 314 ViewGraph(this, "dag." + DAG.getMachineFunction().getFunction()->getName()); 315#else 316 cerr << "ScheduleDAG::viewGraph is only available in debug builds on " 317 << "systems with Graphviz or gv!\n"; 318#endif // NDEBUG 319} 320