lib/CodeGen/ScheduleDAGPrinter.cpp

   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/Constants.h"
  15 #include "llvm/Function.h"
  16 #include "llvm/Assembly/Writer.h"
  17 #include "llvm/CodeGen/ScheduleDAG.h"
  18 #include "llvm/CodeGen/MachineConstantPool.h"
  19 #include "llvm/CodeGen/MachineFunction.h"
  20 #include "llvm/CodeGen/MachineModuleInfo.h"
  21 #include "llvm/Target/TargetRegisterInfo.h"
  22 #include "llvm/Target/TargetMachine.h"
  23 #include "llvm/Support/Debug.h"
  24 #include "llvm/Support/GraphWriter.h"
  25 #include "llvm/Support/raw_ostream.h"
  26 #include "llvm/ADT/DenseSet.h"
  27 #include "llvm/ADT/StringExtras.h"
  28 #include "llvm/Config/config.h"
  29 #include <fstream>
  30 using namespace llvm;
  31
  32 namespace llvm {
  33   template<>
  34   struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
  35
  36   DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
  37
  38     static std::string getGraphName(const ScheduleDAG *G) {
  39       return G->MF.getFunction()->getName();
  40     }
  41
  42     static bool renderGraphFromBottomUp() {
  43       return true;
  44     }
  45
  46     static bool hasNodeAddressLabel(const SUnit *Node,
  47                                     const ScheduleDAG *Graph) {
  48       return true;
  49     }
  50
  51     /// If you want to override the dot attributes printed for a particular
  52     /// edge, override this method.
  53     static std::string getEdgeAttributes(const SUnit *Node,
  54                                          SUnitIterator EI,
  55                                          const ScheduleDAG *Graph) {
  56       if (EI.isArtificialDep())
  57         return "color=cyan,style=dashed";
  58       if (EI.isCtrlDep())
  59         return "color=blue,style=dashed";
  60       return "";
  61     }
  62
  63
  64     std::string getNodeLabel(const SUnit *Node, const ScheduleDAG *Graph);
  65     static std::string getNodeAttributes(const SUnit *N,
  66                                          const ScheduleDAG *Graph) {
  67       return "shape=Mrecord";
  68     }
  69
  70     static void addCustomGraphFeatures(ScheduleDAG *G,
  71                                        GraphWriter<ScheduleDAG*> &GW) {
  72       return G->addCustomGraphFeatures(GW);
  73     }
  74   };
  75 }
  76
  77 std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
  78                                                        const ScheduleDAG *G) {
  79   return G->getGraphNodeLabel(SU);
  80 }
  81
  82 /// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
  83 /// rendered using 'dot'.
  84 ///
  85 void ScheduleDAG::viewGraph() {
  86 // This code is only for debugging!
  87 #ifndef NDEBUG
  88   if (BB->getBasicBlock())
  89     ViewGraph(this, "dag." + MF.getFunction()->getNameStr(), false,
  90               "Scheduling-Units Graph for " + MF.getFunction()->getNameStr() +
  91               ":" + BB->getBasicBlock()->getNameStr());
  92   else
  93     ViewGraph(this, "dag." + MF.getFunction()->getNameStr(), false,
  94               "Scheduling-Units Graph for " + MF.getFunction()->getNameStr());
  95 #else
  96   errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
  97          << "systems with Graphviz or gv!\n";
  98 #endif  // NDEBUG
  99 }