ScheduleDAGPrinter.cpp revision 193323 
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/CodeGen/PseudoSourceValue.h"
22#include "llvm/Target/TargetRegisterInfo.h"
23#include "llvm/Target/TargetMachine.h"
24#include "llvm/Support/Debug.h"
25#include "llvm/Support/GraphWriter.h"
26#include "llvm/Support/raw_ostream.h"
27#include "llvm/ADT/DenseSet.h"
28#include "llvm/ADT/StringExtras.h"
29#include "llvm/Config/config.h"
30#include <fstream>
31using namespace llvm;
32
33namespace llvm {
34  template<>
35  struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
36    static std::string getGraphName(const ScheduleDAG *G) {
37      return G->MF.getFunction()->getName();
38    }
39
40    static bool renderGraphFromBottomUp() {
41      return true;
42    }
43
44    static bool hasNodeAddressLabel(const SUnit *Node,
45                                    const ScheduleDAG *Graph) {
46      return true;
47    }
48
49    /// If you want to override the dot attributes printed for a particular
50    /// edge, override this method.
51    static std::string getEdgeAttributes(const SUnit *Node,
52                                         SUnitIterator EI) {
53      if (EI.isArtificialDep())
54        return "color=cyan,style=dashed";
55      if (EI.isCtrlDep())
56        return "color=blue,style=dashed";
57      return "";
58    }
59
60
61    static std::string getNodeLabel(const SUnit *Node,
62                                    const ScheduleDAG *Graph);
63    static std::string getNodeAttributes(const SUnit *N,
64                                         const ScheduleDAG *Graph) {
65      return "shape=Mrecord";
66    }
67
68    static void addCustomGraphFeatures(ScheduleDAG *G,
69                                       GraphWriter<ScheduleDAG*> &GW) {
70      return G->addCustomGraphFeatures(GW);
71    }
72  };
73}
74
75std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
76                                                       const ScheduleDAG *G) {
77  return G->getGraphNodeLabel(SU);
78}
79
80/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
81/// rendered using 'dot'.
82///
83void ScheduleDAG::viewGraph() {
84// This code is only for debugging!
85#ifndef NDEBUG
86  if (BB->getBasicBlock())
87    ViewGraph(this, "dag." + MF.getFunction()->getName(),
88              "Scheduling-Units Graph for " + MF.getFunction()->getName() + ':' +
89              BB->getBasicBlock()->getName());
90  else
91    ViewGraph(this, "dag." + MF.getFunction()->getName(),
92              "Scheduling-Units Graph for " + MF.getFunction()->getName());
93#else
94  cerr << "ScheduleDAG::viewGraph is only available in debug builds on "
95       << "systems with Graphviz or gv!\n";
96#endif  // NDEBUG
97}
98