llvm-6502/tools/opt/GraphPrinters.cpp

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//===- GraphPrinters.cpp - DOT printers for various graph types -----------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and 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 <iostream>
#include <fstream>
using namespace llvm;
template<typename GraphType>
static void WriteGraphToFile(std::ostream &O, const std::string &GraphName,
const GraphType &GT) {
std::string Filename = GraphName + ".dot";
O << "Writing '" << Filename << "'...";
std::ofstream F(Filename.c_str());
if (F.good())
WriteGraph(F, GT);
else
O << " error opening file for writing!";
O << "\n";
}
//===----------------------------------------------------------------------===//
// Call Graph Printer
//===----------------------------------------------------------------------===//
namespace llvm {
template<>
struct DOTGraphTraits<CallGraph*> : public DefaultDOTGraphTraits {
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 "Indirect call node";
}
};
}
namespace {
struct CallGraphPrinter : public ModulePass {
static char ID; // Pass ID, replacement for typeid
CallGraphPrinter() : ModulePass((intptr_t)&ID) {}
virtual bool runOnModule(Module &M) {
WriteGraphToFile(std::cerr, "callgraph", &getAnalysis<CallGraph>());
return false;
}
void print(std::ostream &OS) const {}
void print(std::ostream &OS, const llvm::Module*) const {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<CallGraph>();
AU.setPreservesAll();
}
};
char CallGraphPrinter::ID = 0;
RegisterPass<CallGraphPrinter> P2("print-callgraph",
"Print Call Graph to 'dot' file");
}