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
|
//===-- Support/GraphWriter.h - Write a graph to a .dot file ---*- C++ -*--===//
//
// This file defines a simple interface that can be used to print out generic
// LLVM graphs to ".dot" files. "dot" is a tool that is part of the AT&T
// graphviz package (http://www.research.att.com/sw/tools/graphviz/) which can
// be used to turn the files output by this interface into a variety of
// different graphics formats.
//
// Graphs do not need to implement any interface past what is already required
// by the GraphTraits template, but they can choose to implement specializations
// of the DOTGraphTraits template if they want to customize the graphs output in
// any way.
//
//===----------------------------------------------------------------------===//
#ifndef SUPPORT_GRAPHWRITER_H
#define SUPPORT_GRAPHWRITER_H
#include "Support/DOTGraphTraits.h"
#include "Support/GraphTraits.h"
#include <ostream>
namespace DOT { // Private functions...
inline std::string EscapeString(const std::string &Label) {
std::string Str(Label);
for (unsigned i = 0; i != Str.length(); ++i)
switch (Str[i]) {
case '\n':
Str.insert(Str.begin()+i, '\\'); // Escape character...
++i;
Str[i] = 'n';
break;
case '\t':
Str.insert(Str.begin()+i, ' '); // Convert to two spaces
++i;
Str[i] = ' ';
break;
case '\\':
if (i+1 != Str.length() && Str[i+1] == 'l')
break; // don't disturb \l
case '{': case '}':
case '<': case '>':
Str.insert(Str.begin()+i, '\\'); // Escape character...
++i; // don't infinite loop
break;
}
return Str;
}
}
template<typename GraphType>
class GraphWriter {
std::ostream &O;
const GraphType &G;
typedef DOTGraphTraits<GraphType> DOTTraits;
typedef GraphTraits<GraphType> GTraits;
typedef typename GTraits::NodeType NodeType;
typedef typename GTraits::nodes_iterator node_iterator;
typedef typename GTraits::ChildIteratorType child_iterator;
public:
GraphWriter(std::ostream &o, const GraphType &g,
const std::string &Name) : O(o), G(g) {
if (Name.empty())
O << "digraph foo {\n"; // Graph name doesn't matter
else
O << "digraph " << Name << " {\n";
std::string GraphName = DOTTraits::getGraphName(G);
if (!GraphName.empty())
O << "\tlabel=\"" << DOT::EscapeString(GraphName) << "\";\n";
O << DOTTraits::getGraphProperties(G);
O << "\n";
writeNodes();
}
~GraphWriter() {
// Finish off the graph
O << "}\n";
}
void writeNodes() {
// Loop over the graph, printing it out...
for (node_iterator I = GTraits::nodes_begin(G), E = GTraits::nodes_end(G);
I != E; ++I)
writeNode(&*I);
}
void writeNode(NodeType *Node) {
std::string NodeAttributes = DOTTraits::getNodeAttributes(Node);
O << "\tNode" << (void*)Node << " [shape=record,";
if (!NodeAttributes.empty()) O << NodeAttributes << ",";
O << "label=\"{"
<< DOT::EscapeString(DOTTraits::getNodeLabel(Node, G));
// Print out the fields of the current node...
child_iterator EI = GTraits::child_begin(Node);
child_iterator EE = GTraits::child_end(Node);
if (EI != EE) {
O << "|{";
for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i) {
if (i) O << "|";
O << "<g" << i << ">" << DOTTraits::getEdgeSourceLabel(Node, EI);
}
if (EI != EE)
O << "|truncated...";
O << "}";
}
O << "}\"];\n"; // Finish printing the "node" line
// Output all of the edges now
EI = GTraits::child_begin(Node);
for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i)
writeEdge(Node, i, EI);
}
void writeEdge(NodeType *Node, unsigned edgeidx, child_iterator EI) {
if (NodeType *TargetNode = *EI) {
O << "\tNode" << (void*)Node << ":g" << edgeidx << " -> Node"
<< (void*)TargetNode;
if (DOTTraits::edgeTargetsEdgeSource(Node, EI)) {
child_iterator TargetIt = DOTTraits::getEdgeTarget(Node, EI);
// Figure out which edge this targets...
unsigned Offset = std::distance(GTraits::child_begin(TargetNode),
TargetIt);
if (Offset > 64) Offset = 64; // Targetting the truncated part?
O << ":g" << Offset;
}
std::string EdgeAttributes = DOTTraits::getEdgeAttributes(Node, EI);
if (!EdgeAttributes.empty())
O << "[" << EdgeAttributes << "]";
O << ";\n";
}
}
};
template<typename GraphType>
std::ostream &WriteGraph(std::ostream &O, const GraphType &G,
const std::string &Name = "") {
// Start the graph emission process...
GraphWriter<GraphType> W(O, G, Name);
return O;
}
#endif
|
