summaryrefslogtreecommitdiffstats
path: root/include/llvm/Support/GraphWriter.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/llvm/Support/GraphWriter.h')
-rw-r--r--include/llvm/Support/GraphWriter.h323
1 files changed, 323 insertions, 0 deletions
diff --git a/include/llvm/Support/GraphWriter.h b/include/llvm/Support/GraphWriter.h
new file mode 100644
index 0000000..ca28aafa
--- /dev/null
+++ b/include/llvm/Support/GraphWriter.h
@@ -0,0 +1,323 @@
+//===-- 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>
+
+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;
+ }
+}
+
+void DisplayGraph(const sys::Path& Filename);
+
+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) : O(o), G(g) {}
+
+ 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));
+
+ // 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));
+
+ // 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 << "<g" << 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,
+ const std::string &Name = "",
+ const std::string &Title = "") {
+ // Start the graph emission process...
+ GraphWriter<GraphType> W(O, G);
+
+ // 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,
+ 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, 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,
+ const std::string& Title = "") {
+ sys::Path Filename = WriteGraph(G, Name, Title);
+
+ if (Filename.isEmpty()) {
+ return;
+ }
+
+ DisplayGraph(Filename);
+}
+
+} // End llvm namespace
+
+#endif
OpenPOWER on IntegriCloud