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