ScheduleDAGPrinter.cpp revision 25ad1cc32af8d526eb72893a513a486bc28c5106 
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>
30using namespace llvm;
31
32namespace 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
77std::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///
85void ScheduleDAG::viewGraph() {
86// This code is only for debugging!
87#ifndef NDEBUG
88  if (BB->getBasicBlock())
89    ViewGraph(this, "dag." + MF.getFunction()->getName(), false,
90              "Scheduling-Units Graph for " + MF.getFunction()->getName() +
91              ":" + BB->getBasicBlock()->getName());
92  else
93    ViewGraph(this, "dag." + MF.getFunction()->getName(), false,
94              "Scheduling-Units Graph for " + MF.getFunction()->getName());
95#else
96  errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
97         << "systems with Graphviz or gv!\n";
98#endif  // NDEBUG
99}
100