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//===- GraphPrinters.cpp - DOT printers for various graph types -----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines several printers for various different types of graphs used
// by the LLVM infrastructure. It uses the generic graph interface to convert
// the graph into a .dot graph. These graphs can then be processed with the
// "dot" tool to convert them to postscript or some other suitable format.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/GraphWriter.h"
#include "llvm/Pass.h"
#include "llvm/Value.h"
#include "llvm/Analysis/CallGraph.h"
#include "llvm/Analysis/Dominators.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
template<typename GraphType>
static void WriteGraphToFile(raw_ostream &O, const std::string &GraphName,
const GraphType >) {
std::string Filename = GraphName + ".dot";
O << "Writing '" << Filename << "'...";
std::string ErrInfo;
tool_output_file F(Filename.c_str(), ErrInfo);
if (ErrInfo.empty()) {
WriteGraph(F.os(), GT);
F.os().close();
if (!F.os().has_error()) {
O << "\n";
F.keep();
return;
}
}
O << " error opening file for writing!\n";
F.os().clear_error();
}
//===----------------------------------------------------------------------===//
// Call Graph Printer
//===----------------------------------------------------------------------===//
namespace llvm {
template<>
struct DOTGraphTraits<CallGraph*> : public DefaultDOTGraphTraits {
DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
static std::string getGraphName(CallGraph *F) {
return "Call Graph";
}
static std::string getNodeLabel(CallGraphNode *Node, CallGraph *Graph) {
if (Node->getFunction())
return ((Value*)Node->getFunction())->getName();
else
return "external node";
}
};
}
namespace {
struct CallGraphPrinter : public ModulePass {
static char ID; // Pass ID, replacement for typeid
CallGraphPrinter() : ModulePass(ID) {}
virtual bool runOnModule(Module &M) {
WriteGraphToFile(llvm::errs(), "callgraph", &getAnalysis<CallGraph>());
return false;
}
void print(raw_ostream &OS, const llvm::Module*) const {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<CallGraph>();
AU.setPreservesAll();
}
};
}
char CallGraphPrinter::ID = 0;
static RegisterPass<CallGraphPrinter> P2("dot-callgraph",
"Print Call Graph to 'dot' file");
//===----------------------------------------------------------------------===//
// DomInfoPrinter Pass
//===----------------------------------------------------------------------===//
namespace {
class DomInfoPrinter : public FunctionPass {
public:
static char ID; // Pass identification, replacement for typeid
DomInfoPrinter() : FunctionPass(ID) {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequired<DominatorTree>();
AU.addRequired<DominanceFrontier>();
}
virtual bool runOnFunction(Function &F) {
DominatorTree &DT = getAnalysis<DominatorTree>();
DT.dump();
DominanceFrontier &DF = getAnalysis<DominanceFrontier>();
DF.dump();
return false;
}
};
}
char DomInfoPrinter::ID = 0;
static RegisterPass<DomInfoPrinter>
DIP("print-dom-info", "Dominator Info Printer", true, true);
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