aboutsummaryrefslogtreecommitdiffstats
path: root/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
blob: 3786bd197b859716796d7fb2c5455519f10f2af7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
//===-- SelectionDAGPrinter.cpp - Implement SelectionDAG::viewGraph() -----===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This implements the SelectionDAG::viewGraph method.
//
//===----------------------------------------------------------------------===//

#include "ScheduleDAGSDNodes.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/GraphWriter.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Config/config.h"
using namespace llvm;

namespace llvm {
  template<>
  struct DOTGraphTraits<SelectionDAG*> : public DefaultDOTGraphTraits {

    explicit DOTGraphTraits(bool isSimple=false) :
      DefaultDOTGraphTraits(isSimple) {}

    static bool hasEdgeDestLabels() {
      return true;
    }

    static unsigned numEdgeDestLabels(const void *Node) {
      return ((const SDNode *) Node)->getNumValues();
    }

    static std::string getEdgeDestLabel(const void *Node, unsigned i) {
      return ((const SDNode *) Node)->getValueType(i).getEVTString();
    }

    template<typename EdgeIter>
    static std::string getEdgeSourceLabel(const void *Node, EdgeIter I) {
      return itostr(I - SDNodeIterator::begin((SDNode *) Node));
    }

    /// edgeTargetsEdgeSource - This method returns true if this outgoing edge
    /// should actually target another edge source, not a node.  If this method
    /// is implemented, getEdgeTarget should be implemented.
    template<typename EdgeIter>
    static bool edgeTargetsEdgeSource(const void *Node, EdgeIter I) {
      return true;
    }

    /// getEdgeTarget - If edgeTargetsEdgeSource returns true, this method is
    /// called to determine which outgoing edge of Node is the target of this
    /// edge.
    template<typename EdgeIter>
    static EdgeIter getEdgeTarget(const void *Node, EdgeIter I) {
      SDNode *TargetNode = *I;
      SDNodeIterator NI = SDNodeIterator::begin(TargetNode);
      std::advance(NI, I.getNode()->getOperand(I.getOperand()).getResNo());
      return NI;
    }

    static std::string getGraphName(const SelectionDAG *G) {
      return G->getMachineFunction().getFunction()->getName();
    }

    static bool renderGraphFromBottomUp() {
      return true;
    }

    static bool hasNodeAddressLabel(const SDNode *Node,
                                    const SelectionDAG *Graph) {
      return true;
    }

    /// If you want to override the dot attributes printed for a particular
    /// edge, override this method.
    template<typename EdgeIter>
    static std::string getEdgeAttributes(const void *Node, EdgeIter EI) {
      SDValue Op = EI.getNode()->getOperand(EI.getOperand());
      EVT VT = Op.getValueType();
      if (VT == MVT::Flag)
        return "color=red,style=bold";
      else if (VT == MVT::Other)
        return "color=blue,style=dashed";
      return "";
    }


    static std::string getSimpleNodeLabel(const SDNode *Node,
                                          const SelectionDAG *G) {
      std::string Result = Node->getOperationName(G);
      {
        raw_string_ostream OS(Result);
        Node->print_details(OS, G);
      }
      return Result;
    }
    std::string getNodeLabel(const SDNode *Node, const SelectionDAG *Graph);
    static std::string getNodeAttributes(const SDNode *N,
                                         const SelectionDAG *Graph) {
#ifndef NDEBUG
      const std::string &Attrs = Graph->getGraphAttrs(N);
      if (!Attrs.empty()) {
        if (Attrs.find("shape=") == std::string::npos)
          return std::string("shape=Mrecord,") + Attrs;
        else
          return Attrs;
      }
#endif
      return "shape=Mrecord";
    }

    static void addCustomGraphFeatures(SelectionDAG *G,
                                       GraphWriter<SelectionDAG*> &GW) {
      GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot");
      if (G->getRoot().getNode())
        GW.emitEdge(0, -1, G->getRoot().getNode(), G->getRoot().getResNo(),
                    "color=blue,style=dashed");
    }
  };
}

std::string DOTGraphTraits<SelectionDAG*>::getNodeLabel(const SDNode *Node,
                                                        const SelectionDAG *G) {
  return DOTGraphTraits<SelectionDAG*>::getSimpleNodeLabel(Node, G);
}


/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
/// rendered using 'dot'.
///
void SelectionDAG::viewGraph(const std::string &Title) {
// This code is only for debugging!
#ifndef NDEBUG
  ViewGraph(this, "dag." + getMachineFunction().getFunction()->getNameStr(),
            false, Title);
#else
  errs() << "SelectionDAG::viewGraph is only available in debug builds on "
         << "systems with Graphviz or gv!\n";
#endif  // NDEBUG
}

// This overload is defined out-of-line here instead of just using a
// default parameter because this is easiest for gdb to call.
void SelectionDAG::viewGraph() {
  viewGraph("");
}

/// clearGraphAttrs - Clear all previously defined node graph attributes.
/// Intended to be used from a debugging tool (eg. gdb).
void SelectionDAG::clearGraphAttrs() {
#ifndef NDEBUG
  NodeGraphAttrs.clear();
#else
  errs() << "SelectionDAG::clearGraphAttrs is only available in debug builds"
         << " on systems with Graphviz or gv!\n";
#endif
}


/// setGraphAttrs - Set graph attributes for a node. (eg. "color=red".)
///
void SelectionDAG::setGraphAttrs(const SDNode *N, const char *Attrs) {
#ifndef NDEBUG
  NodeGraphAttrs[N] = Attrs;
#else
  errs() << "SelectionDAG::setGraphAttrs is only available in debug builds"
         << " on systems with Graphviz or gv!\n";
#endif
}


/// getGraphAttrs - Get graph attributes for a node. (eg. "color=red".)
/// Used from getNodeAttributes.
const std::string SelectionDAG::getGraphAttrs(const SDNode *N) const {
#ifndef NDEBUG
  std::map<const SDNode *, std::string>::const_iterator I =
    NodeGraphAttrs.find(N);

  if (I != NodeGraphAttrs.end())
    return I->second;
  else
    return "";
#else
  errs() << "SelectionDAG::getGraphAttrs is only available in debug builds"
         << " on systems with Graphviz or gv!\n";
  return std::string("");
#endif
}

/// setGraphColor - Convenience for setting node color attribute.
///
void SelectionDAG::setGraphColor(const SDNode *N, const char *Color) {
#ifndef NDEBUG
  NodeGraphAttrs[N] = std::string("color=") + Color;
#else
  errs() << "SelectionDAG::setGraphColor is only available in debug builds"
         << " on systems with Graphviz or gv!\n";
#endif
}

/// setSubgraphColorHelper - Implement setSubgraphColor.  Return
/// whether we truncated the search.
///
bool SelectionDAG::setSubgraphColorHelper(SDNode *N, const char *Color, DenseSet<SDNode *> &visited,
                                          int level, bool &printed) {
  bool hit_limit = false;

#ifndef NDEBUG
  if (level >= 20) {
    if (!printed) {
      printed = true;
      DEBUG(dbgs() << "setSubgraphColor hit max level\n");
    }
    return true;
  }

  unsigned oldSize = visited.size();
  visited.insert(N);
  if (visited.size() != oldSize) {
    setGraphColor(N, Color);
    for(SDNodeIterator i = SDNodeIterator::begin(N), iend = SDNodeIterator::end(N);
        i != iend;
        ++i) {
      hit_limit = setSubgraphColorHelper(*i, Color, visited, level+1, printed) || hit_limit;
    }
  }
#else
  errs() << "SelectionDAG::setSubgraphColor is only available in debug builds"
         << " on systems with Graphviz or gv!\n";
#endif
  return hit_limit;
}

/// setSubgraphColor - Convenience for setting subgraph color attribute.
///
void SelectionDAG::setSubgraphColor(SDNode *N, const char *Color) {
#ifndef NDEBUG
  DenseSet<SDNode *> visited;
  bool printed = false;
  if (setSubgraphColorHelper(N, Color, visited, 0, printed)) {
    // Visually mark that we hit the limit
    if (strcmp(Color, "red") == 0) {
      setSubgraphColorHelper(N, "blue", visited, 0, printed);
    } else if (strcmp(Color, "yellow") == 0) {
      setSubgraphColorHelper(N, "green", visited, 0, printed);
    }
  }

#else
  errs() << "SelectionDAG::setSubgraphColor is only available in debug builds"
         << " on systems with Graphviz or gv!\n";
#endif
}

std::string ScheduleDAGSDNodes::getGraphNodeLabel(const SUnit *SU) const {
  std::string s;
  raw_string_ostream O(s);
  O << "SU(" << SU->NodeNum << "): ";
  if (SU->getNode()) {
    SmallVector<SDNode *, 4> FlaggedNodes;
    for (SDNode *N = SU->getNode(); N; N = N->getFlaggedNode())
      FlaggedNodes.push_back(N);
    while (!FlaggedNodes.empty()) {
      O << DOTGraphTraits<SelectionDAG*>
	     ::getSimpleNodeLabel(FlaggedNodes.back(), DAG);
      FlaggedNodes.pop_back();
      if (!FlaggedNodes.empty())
        O << "\n    ";
    }
  } else {
    O << "CROSS RC COPY";
  }
  return O.str();
}

void ScheduleDAGSDNodes::getCustomGraphFeatures(GraphWriter<ScheduleDAG*> &GW) const {
  if (DAG) {
    // Draw a special "GraphRoot" node to indicate the root of the graph.
    GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot");
    const SDNode *N = DAG->getRoot().getNode();
    if (N && N->getNodeId() != -1)
      GW.emitEdge(0, -1, &SUnits[N->getNodeId()], -1,
                  "color=blue,style=dashed");
  }
}