1 //===-- ScheduleDAGPrinter.cpp - Implement ScheduleDAG::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 ScheduleDAG::viewGraph method. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/CodeGen/ScheduleDAG.h" 15 #include "llvm/ADT/DenseSet.h" 16 #include "llvm/ADT/StringExtras.h" 17 #include "llvm/CodeGen/MachineConstantPool.h" 18 #include "llvm/CodeGen/MachineFunction.h" 19 #include "llvm/CodeGen/MachineModuleInfo.h" 20 #include "llvm/IR/Constants.h" 21 #include "llvm/Support/Debug.h" 22 #include "llvm/Support/GraphWriter.h" 23 #include "llvm/Support/raw_ostream.h" 24 #include "llvm/Target/TargetRegisterInfo.h" 25 #include <fstream> 26 using namespace llvm; 27 28 namespace llvm { 29 template<> 30 struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits { 31 32 DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 33 34 static std::string getGraphName(const ScheduleDAG *G) { 35 return G->MF.getName(); 36 } 37 38 static bool renderGraphFromBottomUp() { 39 return true; 40 } 41 42 static bool isNodeHidden(const SUnit *Node) { 43 return (Node->NumPreds > 10 || Node->NumSuccs > 10); 44 } 45 46 static std::string getNodeIdentifierLabel(const SUnit *Node, 47 const ScheduleDAG *Graph) { 48 std::string R; 49 raw_string_ostream OS(R); 50 OS << static_cast<const void *>(Node); 51 return R; 52 } 53 54 /// If you want to override the dot attributes printed for a particular 55 /// edge, override this method. 56 static std::string getEdgeAttributes(const SUnit *Node, 57 SUnitIterator EI, 58 const ScheduleDAG *Graph) { 59 if (EI.isArtificialDep()) 60 return "color=cyan,style=dashed"; 61 if (EI.isCtrlDep()) 62 return "color=blue,style=dashed"; 63 return ""; 64 } 65 66 67 std::string getNodeLabel(const SUnit *Node, const ScheduleDAG *Graph); 68 static std::string getNodeAttributes(const SUnit *N, 69 const ScheduleDAG *Graph) { 70 return "shape=Mrecord"; 71 } 72 73 static void addCustomGraphFeatures(ScheduleDAG *G, 74 GraphWriter<ScheduleDAG*> &GW) { 75 return G->addCustomGraphFeatures(GW); 76 } 77 }; 78 } 79 80 std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU, 81 const ScheduleDAG *G) { 82 return G->getGraphNodeLabel(SU); 83 } 84 85 /// viewGraph - Pop up a ghostview window with the reachable parts of the DAG 86 /// rendered using 'dot'. 87 /// 88 void ScheduleDAG::viewGraph(const Twine &Name, const Twine &Title) { 89 // This code is only for debugging! 90 #ifndef NDEBUG 91 ViewGraph(this, Name, false, Title); 92 #else 93 errs() << "ScheduleDAG::viewGraph is only available in debug builds on " 94 << "systems with Graphviz or gv!\n"; 95 #endif // NDEBUG 96 } 97 98 /// Out-of-line implementation with no arguments is handy for gdb. 99 void ScheduleDAG::viewGraph() { 100 viewGraph(getDAGName(), "Scheduling-Units Graph for " + getDAGName()); 101 } 102
