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llvm-6502/include/llvm/Support/GraphWriter.h

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//===-- llvm/Support/GraphWriter.h - Write graph to a .dot file -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// 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 LLVM_SUPPORT_GRAPHWRITER_H
#define LLVM_SUPPORT_GRAPHWRITER_H
#include "llvm/Support/DOTGraphTraits.h"
#include "llvm/Support/Streams.h"
#include "llvm/ADT/GraphTraits.h"
#include "llvm/System/Path.h"
#include <fstream>
#include <vector>
#include <cassert>
namespace llvm {
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())
switch (Str[i+1]) {
case 'l': continue; // don't disturb \l
case '|': case '{': case '}':
Str.erase(Str.begin()+i); continue;
default: break;
}
case '{': case '}':
case '<': case '>':
case '|': case '"':
Str.insert(Str.begin()+i, '\\'); // Escape character...
++i; // don't infinite loop
break;
}
return Str;
}
}
namespace GraphProgram {
enum Name {
DOT,
FDP,
NEATO,
TWOPI,
CIRCO
};
}
void DisplayGraph(const sys::Path& Filename, bool wait=true, GraphProgram::Name program = GraphProgram::DOT);
template<typename GraphType>
class GraphWriter {
std::ostream &O;
const GraphType &G;
bool ShortNames;
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, bool SN) :
O(o), G(g), ShortNames(SN) {}
void writeHeader(const std::string &Name) {
std::string GraphName = DOTTraits::getGraphName(G);
if (!Name.empty())
O << "digraph \"" << DOT::EscapeString(Name) << "\" {\n";
else if (!GraphName.empty())
O << "digraph \"" << DOT::EscapeString(GraphName) << "\" {\n";
else
O << "digraph unnamed {\n";
if (DOTTraits::renderGraphFromBottomUp())
O << "\trankdir=\"BT\";\n";
if (!Name.empty())
O << "\tlabel=\"" << DOT::EscapeString(Name) << "\";\n";
else if (!GraphName.empty())
O << "\tlabel=\"" << DOT::EscapeString(GraphName) << "\";\n";
O << DOTTraits::getGraphProperties(G);
O << "\n";
}
void writeFooter() {
// 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) {
writeNode(&Node);
}
void writeNode(NodeType *const *Node) {
writeNode(*Node);
}
void writeNode(NodeType *Node) {
std::string NodeAttributes = DOTTraits::getNodeAttributes(Node, G);
O << "\tNode" << static_cast<const void*>(Node) << " [shape=record,";
if (!NodeAttributes.empty()) O << NodeAttributes << ",";
O << "label=\"{";
if (!DOTTraits::renderGraphFromBottomUp()) {
O << DOT::EscapeString(DOTTraits::getNodeLabel(Node, G, ShortNames));
// If we should include the address of the node in the label, do so now.
if (DOTTraits::hasNodeAddressLabel(Node, G))
O << "|" << (void*)Node;
}
// 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) {
if (!DOTTraits::renderGraphFromBottomUp()) O << "|";
O << "{";
for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i) {
if (i) O << "|";
O << "<s" << i << ">" << DOTTraits::getEdgeSourceLabel(Node, EI);
}
if (EI != EE)
O << "|<s64>truncated...";
O << "}";
if (DOTTraits::renderGraphFromBottomUp()) O << "|";
}
if (DOTTraits::renderGraphFromBottomUp()) {
O << DOT::EscapeString(DOTTraits::getNodeLabel(Node, G, ShortNames));
// If we should include the address of the node in the label, do so now.
if (DOTTraits::hasNodeAddressLabel(Node, G))
O << "|" << (void*)Node;
}
if (DOTTraits::hasEdgeDestLabels()) {
O << "|{";
unsigned i = 0, e = DOTTraits::numEdgeDestLabels(Node);
for (; i != e && i != 64; ++i) {
if (i) O << "|";
O << "<d" << i << ">" << DOTTraits::getEdgeDestLabel(Node, i);
}
if (i != e)
O << "|<d64>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);
for (; EI != EE; ++EI)
writeEdge(Node, 64, EI);
}
void writeEdge(NodeType *Node, unsigned edgeidx, child_iterator EI) {
if (NodeType *TargetNode = *EI) {
int DestPort = -1;
if (DOTTraits::edgeTargetsEdgeSource(Node, EI)) {
child_iterator TargetIt = DOTTraits::getEdgeTarget(Node, EI);
// Figure out which edge this targets...
unsigned Offset =
(unsigned)std::distance(GTraits::child_begin(TargetNode), TargetIt);
DestPort = static_cast<int>(Offset);
}
emitEdge(static_cast<const void*>(Node), edgeidx,
static_cast<const void*>(TargetNode), DestPort,
DOTTraits::getEdgeAttributes(Node, EI));
}
}
/// emitSimpleNode - Outputs a simple (non-record) node
void emitSimpleNode(const void *ID, const std::string &Attr,
const std::string &Label, unsigned NumEdgeSources = 0,
const std::vector<std::string> *EdgeSourceLabels = 0) {
O << "\tNode" << ID << "[ ";
if (!Attr.empty())
O << Attr << ",";
O << " label =\"";
if (NumEdgeSources) O << "{";
O << DOT::EscapeString(Label);
if (NumEdgeSources) {
O << "|{";
for (unsigned i = 0; i != NumEdgeSources; ++i) {
if (i) O << "|";
O << "<s" << i << ">";
if (EdgeSourceLabels) O << (*EdgeSourceLabels)[i];
}
O << "}}";
}
O << "\"];\n";
}
/// emitEdge - Output an edge from a simple node into the graph...
void emitEdge(const void *SrcNodeID, int SrcNodePort,
const void *DestNodeID, int DestNodePort,
const std::string &Attrs) {
if (SrcNodePort > 64) return; // Eminating from truncated part?
if (DestNodePort > 64) DestNodePort = 64; // Targetting the truncated part?
O << "\tNode" << SrcNodeID;
if (SrcNodePort >= 0)
O << ":s" << SrcNodePort;
O << " -> Node" << DestNodeID;
if (DestNodePort >= 0)
O << ":d" << DestNodePort;
if (!Attrs.empty())
O << "[" << Attrs << "]";
O << ";\n";
}
};
template<typename GraphType>
std::ostream &WriteGraph(std::ostream &O, const GraphType &G,
bool ShortNames = false,
const std::string &Name = "",
const std::string &Title = "") {
// Start the graph emission process...
GraphWriter<GraphType> W(O, G, ShortNames);
// Output the header for the graph...
W.writeHeader(Title);
// Emit all of the nodes in the graph...
W.writeNodes();
// Output any customizations on the graph
DOTGraphTraits<GraphType>::addCustomGraphFeatures(G, W);
// Output the end of the graph
W.writeFooter();
return O;
}
template<typename GraphType>
sys::Path WriteGraph(const GraphType &G,
const std::string& Name,
bool ShortNames = false,
const std::string& Title = "") {
std::string ErrMsg;
sys::Path Filename = sys::Path::GetTemporaryDirectory(&ErrMsg);
if (Filename.isEmpty()) {
cerr << "Error: " << ErrMsg << "\n";
return Filename;
}
Filename.appendComponent(Name + ".dot");
if (Filename.makeUnique(true,&ErrMsg)) {
cerr << "Error: " << ErrMsg << "\n";
return sys::Path();
}
cerr << "Writing '" << Filename << "'... ";
std::ofstream O(Filename.c_str());
if (O.good()) {
WriteGraph(O, G, ShortNames, Name, Title);
cerr << " done. \n";
O.close();
} else {
cerr << "error opening file for writing!\n";
Filename.clear();
}
return Filename;
}
/// ViewGraph - Emit a dot graph, run 'dot', run gv on the postscript file,
/// then cleanup. For use from the debugger.
///
template<typename GraphType>
void ViewGraph(const GraphType& G,
const std::string& Name,
bool ShortNames = false,
const std::string& Title = "",
GraphProgram::Name Program = GraphProgram::DOT) {
sys::Path Filename = WriteGraph(G, Name, ShortNames, Title);
if (Filename.isEmpty()) {
return;
}
DisplayGraph(Filename, true, Program);
}
} // End llvm namespace
#endif
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