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//===- Printer.cpp - Code for printing data structure graphs nicely -------===//
//
// This file implements the 'dot' graph printer.
//
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/DataStructure.h"
#include "llvm/Analysis/DSGraph.h"
#include "llvm/Analysis/DSGraphTraits.h"
#include "llvm/Module.h"
#include "llvm/Assembly/Writer.h"
#include "Support/CommandLine.h"
#include "Support/GraphWriter.h"
#include <fstream>
#include <sstream>
using std::string;
// OnlyPrintMain - The DataStructure printer exposes this option to allow
// printing of only the graph for "main".
//
static cl::opt<bool> OnlyPrintMain("only-print-main-ds", cl::ReallyHidden);
void DSNode::dump() const { print(std::cerr, 0); }
static string getCaption(const DSNode *N, const DSGraph *G) {
std::stringstream OS;
Module *M = G && &G->getFunction() ? G->getFunction().getParent() : 0;
for (unsigned i = 0, e = N->getTypeEntries().size(); i != e; ++i) {
WriteTypeSymbolic(OS, N->getTypeEntries()[i].Ty, M);
if (N->getTypeEntries()[i].Offset)
OS << "@" << N->getTypeEntries()[i].Offset;
if (N->getTypeEntries()[i].isArray)
OS << " array";
OS << "\n";
}
if (N->NodeType & DSNode::AllocaNode ) OS << "S";
if (N->NodeType & DSNode::HeapNode ) OS << "H";
if (N->NodeType & DSNode::GlobalNode ) OS << "G";
if (N->NodeType & DSNode::UnknownNode) OS << "U";
if (N->NodeType & DSNode::Incomplete ) OS << "I";
if (N->NodeType & DSNode::Modified ) OS << "M";
if (N->NodeType & DSNode::Read ) OS << "R";
for (unsigned i = 0, e = N->getGlobals().size(); i != e; ++i) {
WriteAsOperand(OS, N->getGlobals()[i], false, true, M);
OS << "\n";
}
return OS.str();
}
template<>
struct DOTGraphTraits<const DSGraph*> : public DefaultDOTGraphTraits {
static std::string getGraphName(const DSGraph *G) {
if (G->hasFunction())
return "Function " + G->getFunction().getName();
else
return "Non-function graph";
}
static const char *getGraphProperties(const DSGraph *G) {
return "\tedge [arrowtail=\"dot\"];\n"
"\tsize=\"10,7.5\";\n"
"\trotate=\"90\";\n";
}
static std::string getNodeLabel(const DSNode *Node, const DSGraph *Graph) {
return getCaption(Node, Graph);
}
static std::string getNodeAttributes(const DSNode *N) {
return "shape=Mrecord";//fontname=Courier";
}
static int getEdgeSourceLabel(const DSNode *Node, DSNode::iterator I) {
assert(Node == I.getNode() && "Iterator not for this node!");
return Node->getMergeMapLabel(I.getOffset());
}
/// addCustomGraphFeatures - Use this graph writing hook to emit call nodes
/// and the return node.
///
static void addCustomGraphFeatures(const DSGraph *G,
GraphWriter<const DSGraph*> &GW) {
// Add scalar nodes to the graph...
const std::map<Value*, DSNodeHandle> &VM = G->getScalarMap();
for (std::map<Value*, DSNodeHandle>::const_iterator I = VM.begin();
I != VM.end(); ++I)
if (!isa<GlobalValue>(I->first)) {
std::stringstream OS;
WriteAsOperand(OS, I->first, false, true, G->getFunction().getParent());
GW.emitSimpleNode(I->first, "plaintext=circle", OS.str());
// Add edge from return node to real destination
int EdgeDest = I->second.getOffset();
if (EdgeDest == 0) EdgeDest = -1;
GW.emitEdge(I->first, -1, I->second.getNode(),
EdgeDest, "arrowtail=tee,color=gray63");
}
// Output the returned value pointer...
if (G->getRetNode().getNode() != 0) {
// Output the return node...
GW.emitSimpleNode((void*)1, "plaintext=circle", "returning");
// Add edge from return node to real destination
int RetEdgeDest = G->getRetNode().getOffset();
if (RetEdgeDest == 0) RetEdgeDest = -1;
GW.emitEdge((void*)1, -1, G->getRetNode().getNode(),
RetEdgeDest, "arrowtail=tee,color=gray63");
}
// Output all of the call nodes...
const std::vector<DSCallSite> &FCs = G->getFunctionCalls();
for (unsigned i = 0, e = FCs.size(); i != e; ++i) {
const DSCallSite &Call = FCs[i];
GW.emitSimpleNode(&Call, "shape=record", "call", Call.getNumPtrArgs()+2);
if (DSNode *N = Call.getRetVal().getNode()) {
int EdgeDest = Call.getRetVal().getOffset();
if (EdgeDest == 0) EdgeDest = -1;
GW.emitEdge(&Call, 0, N, EdgeDest, "color=gray63");
}
if (DSNode *N = Call.getCallee().getNode()) {
int EdgeDest = Call.getCallee().getOffset();
if (EdgeDest == 0) EdgeDest = -1;
GW.emitEdge(&Call, 1, N, EdgeDest, "color=gray63");
}
for (unsigned j = 0, e = Call.getNumPtrArgs(); j != e; ++j)
if (DSNode *N = Call.getPtrArg(j).getNode()) {
int EdgeDest = Call.getPtrArg(j).getOffset();
if (EdgeDest == 0) EdgeDest = -1;
GW.emitEdge(&Call, j+2, N, EdgeDest, "color=gray63");
}
}
}
};
void DSNode::print(std::ostream &O, const DSGraph *G) const {
GraphWriter<const DSGraph *> W(O, G);
W.writeNode(this);
}
void DSGraph::print(std::ostream &O) const {
WriteGraph(O, this, "DataStructures");
}
void DSGraph::writeGraphToFile(std::ostream &O, const string &GraphName) const {
string Filename = GraphName + ".dot";
O << "Writing '" << Filename << "'...";
std::ofstream F(Filename.c_str());
if (F.good()) {
print(F);
O << " [" << getGraphSize() << "+" << getFunctionCalls().size() << "]\n";
} else {
O << " error opening file for writing!\n";
}
}
template <typename Collection>
static void printCollection(const Collection &C, std::ostream &O,
const Module *M, const string &Prefix) {
if (M == 0) {
O << "Null Module pointer, cannot continue!\n";
return;
}
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
if (!I->isExternal() && (I->getName() == "main" || !OnlyPrintMain))
C.getDSGraph((Function&)*I).writeGraphToFile(O, Prefix+I->getName());
}
// print - Print out the analysis results...
void LocalDataStructures::print(std::ostream &O, const Module *M) const {
printCollection(*this, O, M, "ds.");
}
void BUDataStructures::print(std::ostream &O, const Module *M) const {
printCollection(*this, O, M, "bu.");
#if 0
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
if (!I->isExternal()) {
(*getDSGraph(*I).GlobalsGraph)->writeGraphToFile(O, "gg.program");
break;
}
#endif
}
void TDDataStructures::print(std::ostream &O, const Module *M) const {
printCollection(*this, O, M, "td.");
#if 0
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
if (!I->isExternal()) {
(*getDSGraph(*I).GlobalsGraph)->writeGraphToFile(O, "gg.program");
break;
}
#endif
}
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