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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/Module.h"
#include "llvm/Assembly/Writer.h"
#include <fstream>
#include <sstream>
void DSNode::dump() const { print(std::cerr, 0); }
std::string DSNode::getCaption(Function *F) const {
std::stringstream OS;
WriteTypeSymbolic(OS, getType(), F ? F->getParent() : 0);
OS << " ";
if (NodeType & ScalarNode) OS << "S";
if (NodeType & AllocaNode) OS << "A";
if (NodeType & NewNode ) OS << "N";
if (NodeType & GlobalNode) OS << "G";
if (NodeType & SubElement) OS << "E";
if (NodeType & CastNode ) OS << "C";
return OS.str();
}
static std::string getValueName(Value *V, Function &F) {
std::stringstream OS;
WriteAsOperand(OS, V, true, true, F.getParent());
return OS.str();
}
static void replaceIn(std::string &S, char From, const std::string &To) {
for (unsigned i = 0; i < S.size(); )
if (S[i] == From) {
S.replace(S.begin()+i, S.begin()+i+1,
To.begin(), To.end());
i += To.size();
} else {
++i;
}
}
static string escapeLabel(const string &In) {
string Label(In);
replaceIn(Label, '\\', "\\\\"); // Escape caption...
replaceIn(Label, ' ', "\\ ");
replaceIn(Label, '{', "\\{");
replaceIn(Label, '}', "\\}");
return Label;
}
static void writeEdge(std::ostream &O, const void *SrcNode,
const char *SrcNodePortName, int SrcNodeIdx,
const DSNode *VS, const string &EdgeAttr = "") {
O << "\tNode" << SrcNode << SrcNodePortName;
if (SrcNodeIdx != -1) O << SrcNodeIdx;
O << " -> Node" << (void*)VS;
if (!EdgeAttr.empty())
O << "[" << EdgeAttr << "]";
O << ";\n";
}
void DSNode::print(std::ostream &O, Function *F) const {
string Caption = escapeLabel(getCaption(F));
O << "\tNode" << (void*)this << " [ label =\"{" << Caption;
if (!Links.empty()) {
O << "|{";
for (unsigned i = 0; i < Links.size(); ++i) {
if (i) O << "|";
O << "<g" << i << ">";
}
O << "}";
}
O << "}\"];\n";
for (unsigned i = 0; i < Links.size(); ++i)
if (Links[i])
writeEdge(O, this, ":g", i, Links[i]);
}
void DSGraph::print(std::ostream &O) const {
O << "digraph DataStructures {\n"
<< "\tnode [shape=Mrecord];\n"
<< "\tedge [arrowtail=\"dot\"];\n"
<< "\tsize=\"10,7.5\";\n"
<< "\trotate=\"90\";\n"
<< "\tlabel=\"Function\\ " << Func.getName() << "\";\n\n";
// Output all of the nodes...
for (unsigned i = 0, e = Nodes.size(); i != e; ++i)
Nodes[i]->print(O, &Func);
O << "\n";
// Output all of the nodes edges for scalar labels
for (std::map<Value*, DSNodeHandle>::const_iterator I = ValueMap.begin(),
E = ValueMap.end(); I != E; ++I) {
O << "\tNode" << (void*)I->first << "[ shape=circle, label =\""
<< escapeLabel(getValueName(I->first, Func)) << "\",style=dotted];\n";
writeEdge(O, I->first, "",-1, I->second.get(),"arrowtail=tee,style=dotted");
}
// Output the returned value pointer...
if (RetNode != 0) {
O << "\tNode0x1" << "[ shape=circle, label =\""
<< escapeLabel("Return") << "\"];\n";
writeEdge(O, (void*)1, "", -1, RetNode, "arrowtail=tee,style=dotted");
}
// Output all of the call nodes...
for (unsigned i = 0, e = FunctionCalls.size(); i != e; ++i) {
const std::vector<DSNodeHandle> &Call = FunctionCalls[i];
O << "\tNode" << (void*)&Call << " [shape=record,label=\"{call|{";
for (unsigned j = 0, e = Call.size(); j != e; ++j) {
if (j) O << "|";
O << "<g" << j << ">";
}
O << "}}\"];\n";
for (unsigned j = 0, e = Call.size(); j != e; ++j)
if (Call[j])
writeEdge(O, &Call, ":g", j, Call[j]);
}
O << "}\n";
}
// print - Print out the analysis results...
void LocalDataStructures::print(std::ostream &O, Module *M) const {
for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
if (!I->isExternal()) {
std::string Filename = "ds." + I->getName() + ".dot";
O << "Writing '" << Filename << "'...";
std::ofstream F(Filename.c_str());
if (F.good()) {
DSGraph &Graph = getDSGraph(*I);
Graph.print(F);
O << " [" << Graph.getGraphSize() << "]\n";
} else {
O << " error opening file for writing!\n";
}
}
}
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