FindUsedTypes.h

//===- llvm/Analysis/FindUsedTypes.h - Find all Types in use ----*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This pass is used to seek out all of the types in use by the program.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_ANALYSIS_FINDUSEDTYPES_H
#define LLVM_ANALYSIS_FINDUSEDTYPES_H

#include "llvm/Pass.h"
#include <set>

namespace llvm {

class Type;
class Value;

class FindUsedTypes : public ModulePass {
  std::set<const Type *> UsedTypes;
public:
  static char ID; // Pass identification, replacement for typeid
  FindUsedTypes() : ModulePass(&ID) {}

  const std::set<const Type *> &getTypes() const { return UsedTypes; }

  void print(raw_ostream &o, const Module *M) const;

private:
  void IncorporateType(const Type *Ty);

  void IncorporateValue(const Value *V);

public:
  bool runOnModule(Module &M);

  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
    AU.setPreservesAll();
  }
};

} // End llvm namespace

#endif

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