Line data    Source code

       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/ADT/StringExtras.h"
      15             : #include "llvm/CodeGen/MachineConstantPool.h"
      16             : #include "llvm/CodeGen/MachineFunction.h"
      17             : #include "llvm/CodeGen/ScheduleDAG.h"
      18             : #include "llvm/CodeGen/TargetRegisterInfo.h"
      19             : #include "llvm/IR/Constants.h"
      20             : #include "llvm/Support/Debug.h"
      21             : #include "llvm/Support/GraphWriter.h"
      22             : #include "llvm/Support/raw_ostream.h"
      23             : using namespace llvm;
      24             : 
      25             : namespace llvm {
      26             :   template<>
      27             :   struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
      28             : 
      29             :   DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
      30             : 
      31             :     static std::string getGraphName(const ScheduleDAG *G) {
      32             :       return G->MF.getName();
      33             :     }
      34             : 
      35             :     static bool renderGraphFromBottomUp() {
      36             :       return true;
      37             :     }
      38             : 
      39             :     static bool isNodeHidden(const SUnit *Node) {
      40             :       return (Node->NumPreds > 10 || Node->NumSuccs > 10);
      41             :     }
      42             : 
      43             :     static std::string getNodeIdentifierLabel(const SUnit *Node,
      44             :                                               const ScheduleDAG *Graph) {
      45             :       std::string R;
      46             :       raw_string_ostream OS(R);
      47             :       OS << static_cast<const void *>(Node);
      48             :       return R;
      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 *SU, 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           0 : std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
      78             :                                                        const ScheduleDAG *G) {
      79           0 :   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           0 : void ScheduleDAG::viewGraph(const Twine &Name, const Twine &Title) {
      86             :   // This code is only for debugging!
      87             : #ifndef NDEBUG
      88             :   ViewGraph(this, Name, false, Title);
      89             : #else
      90           0 :   errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
      91           0 :          << "systems with Graphviz or gv!\n";
      92             : #endif  // NDEBUG
      93           0 : }
      94             : 
      95             : /// Out-of-line implementation with no arguments is handy for gdb.
      96           0 : void ScheduleDAG::viewGraph() {
      97           0 :   viewGraph(getDAGName(), "Scheduling-Units Graph for " + getDAGName());
      98           0 : }