forked from OSchip/llvm-project
133 lines
4.1 KiB
C++
133 lines
4.1 KiB
C++
//===- GraphPrinters.cpp - DOT printers for various graph types -----------===//
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//
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// This file defines several printers for various different types of graphs used
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// by the LLVM infrastructure. It uses the generic graph interface to convert
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// the graph into a .dot graph. These graphs can then be processed with the
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// "dot" tool to convert them to postscript or some other suitable format.
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//
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//===----------------------------------------------------------------------===//
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#include "Support/GraphWriter.h"
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#include "llvm/Pass.h"
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#include "llvm/iTerminators.h"
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#include "llvm/Analysis/CallGraph.h"
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#include "llvm/Support/CFG.h"
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#include <sstream>
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#include <fstream>
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//===----------------------------------------------------------------------===//
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// Control Flow Graph Printer
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//===----------------------------------------------------------------------===//
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template<>
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struct DOTGraphTraits<Function*> : public DefaultDOTGraphTraits {
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static std::string getGraphName(Function *F) {
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return "CFG for '" + F->getName() + "' function";
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}
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static std::string getNodeLabel(BasicBlock *Node, Function *Graph) {
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std::ostringstream Out;
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Out << Node;
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std::string OutStr = Out.str();
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if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
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// Process string output to make it nicer...
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for (unsigned i = 0; i != OutStr.length(); ++i)
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if (OutStr[i] == '\n') { // Left justify
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OutStr[i] = '\\';
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OutStr.insert(OutStr.begin()+i+1, 'l');
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} else if (OutStr[i] == ';') { // Delete comments!
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unsigned Idx = OutStr.find('\n', i+1); // Find end of line
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OutStr.erase(OutStr.begin()+i, OutStr.begin()+Idx);
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--i;
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}
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return OutStr;
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}
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static std::string getNodeAttributes(BasicBlock *N) {
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return "fontname=Courier";
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}
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static std::string getEdgeSourceLabel(BasicBlock *Node, succ_iterator I) {
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// Label source of conditional branches with "T" or "F"
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if (BranchInst *BI = dyn_cast<BranchInst>(Node->getTerminator()))
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if (BI->isConditional())
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return (I == succ_begin(Node)) ? "T" : "F";
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return "";
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}
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};
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template<typename GraphType>
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static void WriteGraphToFile(std::ostream &O, const std::string &GraphName,
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const GraphType >) {
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std::string Filename = GraphName + ".dot";
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O << "Writing '" << Filename << "'...";
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std::ofstream F(Filename.c_str());
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if (F.good())
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WriteGraph(F, GT);
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else
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O << " error opening file for writing!";
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O << "\n";
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}
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namespace {
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struct CFGPrinter : public FunctionPass {
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virtual bool runOnFunction(Function &Func) {
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WriteGraphToFile(std::cerr, "cfg."+Func.getName(), &Func);
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return false;
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}
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void print(std::ostream &OS) const {}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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};
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RegisterAnalysis<CFGPrinter> P1("print-cfg",
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"Print CFG of function to 'dot' file");
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};
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//===----------------------------------------------------------------------===//
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// Call Graph Printer
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//===----------------------------------------------------------------------===//
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template<>
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struct DOTGraphTraits<CallGraph*> : public DefaultDOTGraphTraits {
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static std::string getGraphName(CallGraph *F) {
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return "Call Graph";
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}
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static std::string getNodeLabel(CallGraphNode *Node, CallGraph *Graph) {
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if (Node->getFunction())
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return Node->getFunction()->getName();
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else
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return "Indirect call node";
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}
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};
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namespace {
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struct CallGraphPrinter : public Pass {
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virtual bool run(Module &M) {
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WriteGraphToFile(std::cerr, "callgraph", &getAnalysis<CallGraph>());
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return false;
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}
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void print(std::ostream &OS) const {}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequired<CallGraph>();
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AU.setPreservesAll();
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}
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};
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RegisterAnalysis<CallGraphPrinter> P2("print-callgraph",
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"Print Call Graph to 'dot' file");
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};
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