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f6516da9b3
* use new api to get all nodes in the graph * Allow custom graph traits git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4109 91177308-0d34-0410-b5e6-96231b3b80d8
123 lines
4.1 KiB
C++
123 lines
4.1 KiB
C++
//===-- Support/GraphWriter.h - Write a graph to a .dot file ---*- C++ -*--===//
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//
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// This file defines a simple interface that can be used to print out generic
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// LLVM graphs to ".dot" files. "dot" is a tool that is part of the AT&T
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// graphviz package (http://www.research.att.com/sw/tools/graphviz/) which can
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// be used to turn the files output by this interface into a variety of
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// different graphics formats.
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//
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// Graphs do not need to implement any interface past what is already required
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// by the GraphTraits template, but they can choose to implement specializations
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// of the DOTGraphTraits template if they want to customize the graphs output in
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// any way.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SUPPORT_GRAPHWRITER_H
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#define SUPPORT_GRAPHWRITER_H
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#include "Support/DOTGraphTraits.h"
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#include "Support/GraphTraits.h"
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#include <ostream>
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namespace DOT { // Private functions...
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inline std::string EscapeString(const std::string &Label) {
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std::string Str(Label);
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for (unsigned i = 0; i != Str.length(); ++i)
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switch (Str[i]) {
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case '\n':
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Str.insert(Str.begin()+i, '\\'); // Escape character...
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++i;
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Str[i] = 'n';
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break;
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case '\t':
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Str.insert(Str.begin()+i, ' '); // Convert to two spaces
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++i;
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Str[i] = ' ';
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break;
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case '\\':
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if (i+1 != Str.length() && Str[i+1] == 'l')
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break; // don't disturb \l
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case '{': case '}':
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case '<': case '>':
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Str.insert(Str.begin()+i, '\\'); // Escape character...
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++i; // don't infinite loop
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break;
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}
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return Str;
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}
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}
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template<typename GraphType>
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std::ostream &WriteGraph(std::ostream &O, const GraphType &G) {
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typedef DOTGraphTraits<GraphType> DOTTraits;
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typedef GraphTraits<GraphType> GTraits;
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typedef typename GTraits::NodeType NodeType;
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typedef typename GTraits::nodes_iterator node_iterator;
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O << "digraph foo {\n"; // Graph name doesn't matter
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std::string GraphName = DOTTraits::getGraphName(G);
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if (!GraphName.empty())
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O << "\tlabel=\"" << DOT::EscapeString(GraphName) << "\";\n";
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O << DOTTraits::getGraphProperties(G);
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O << "\n";
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// Loop over the graph in DFO, printing it out...
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for (node_iterator I = GTraits::nodes_begin(G), E = GTraits::nodes_end(G);
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I != E; ++I) {
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NodeType *Node = &*I;
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std::string NodeAttributes = DOTTraits::getNodeAttributes(Node);
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O << "\tNode" << (void*)Node << " [";
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if (!NodeAttributes.empty()) O << NodeAttributes << ",";
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O << "shape=record,label=\"{"
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<< DOT::EscapeString(DOTTraits::getNodeLabel(Node, G));
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// Print out the fields of the current node...
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typename GTraits::ChildIteratorType EI = GTraits::child_begin(Node);
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typename GTraits::ChildIteratorType EE = GTraits::child_end(Node);
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if (EI != EE) {
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O << "|{";
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for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i) {
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if (i) O << "|";
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O << "<g" << i << ">" << DOTTraits::getEdgeSourceLabel(Node, EI);
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}
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if (EI != EE)
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O << "|truncated...";
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O << "}";
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}
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O << "}\"];\n"; // Finish printing the "node" line
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// Output all of the edges now
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EI = GTraits::child_begin(Node);
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for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i) {
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NodeType *TargetNode = *EI;
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O << "\tNode" << (void*)Node << ":g" << i << " -> Node"
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<< (void*)TargetNode;
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if (DOTTraits::edgeTargetsEdgeSource(Node, EI)) {
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typename GTraits::ChildIteratorType TargetIt =
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DOTTraits::getEdgeTarget(Node, EI);
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// Figure out which edge this targets...
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unsigned Offset = std::distance(GTraits::child_begin(TargetNode),
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TargetIt);
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if (Offset > 64) Offset = 64; // Targetting the trancated part?
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O << ":g" << Offset;
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}
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std::string EdgeAttributes = DOTTraits::getEdgeAttributes(Node, EI);
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if (!EdgeAttributes.empty())
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O << "[" << EdgeAttributes << "]";
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O << ";\n";
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}
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}
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// Finish off the graph
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O << "}\n";
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return O;
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}
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#endif
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