forked from OSchip/llvm-project
121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
//===- GraphPrinters.cpp - DOT printers for various graph types -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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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 "llvm/Support/GraphWriter.h"
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#include "llvm/Pass.h"
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#include "llvm/Value.h"
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#include "llvm/Analysis/CallGraph.h"
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#include "llvm/Analysis/DominanceFrontier.h"
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#include "llvm/Support/ToolOutputFile.h"
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using namespace llvm;
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template<typename GraphType>
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static void WriteGraphToFile(raw_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::string ErrInfo;
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tool_output_file F(Filename.c_str(), ErrInfo);
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if (ErrInfo.empty()) {
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WriteGraph(F.os(), GT);
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F.os().close();
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if (!F.os().has_error()) {
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O << "\n";
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F.keep();
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return;
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}
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}
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O << " error opening file for writing!\n";
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F.os().clear_error();
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}
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//===----------------------------------------------------------------------===//
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// Call Graph Printer
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//===----------------------------------------------------------------------===//
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namespace llvm {
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template<>
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struct DOTGraphTraits<CallGraph*> : public DefaultDOTGraphTraits {
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DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
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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 ((Value*)Node->getFunction())->getName();
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return "external node";
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}
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};
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}
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namespace {
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struct CallGraphPrinter : public ModulePass {
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static char ID; // Pass ID, replacement for typeid
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CallGraphPrinter() : ModulePass(ID) {}
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virtual bool runOnModule(Module &M) {
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WriteGraphToFile(llvm::errs(), "callgraph", &getAnalysis<CallGraph>());
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return false;
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}
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void print(raw_ostream &OS, const llvm::Module*) 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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}
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char CallGraphPrinter::ID = 0;
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static RegisterPass<CallGraphPrinter> P2("dot-callgraph",
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"Print Call Graph to 'dot' file");
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//===----------------------------------------------------------------------===//
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// DomInfoPrinter Pass
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//===----------------------------------------------------------------------===//
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namespace {
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class DomInfoPrinter : public FunctionPass {
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public:
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static char ID; // Pass identification, replacement for typeid
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DomInfoPrinter() : FunctionPass(ID) {}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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AU.addRequired<DominatorTree>();
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AU.addRequired<DominanceFrontier>();
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}
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virtual bool runOnFunction(Function &F) {
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getAnalysis<DominatorTree>().dump();
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getAnalysis<DominanceFrontier>().dump();
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return false;
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}
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};
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}
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char DomInfoPrinter::ID = 0;
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static RegisterPass<DomInfoPrinter>
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DIP("print-dom-info", "Dominator Info Printer", true, true);
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