FindUsedTypes.h revision 193323
1//===- llvm/Analysis/FindUsedTypes.h - Find all Types in use ----*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This pass is used to seek out all of the types in use by the program. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_ANALYSIS_FINDUSEDTYPES_H 15#define LLVM_ANALYSIS_FINDUSEDTYPES_H 16 17#include "llvm/Pass.h" 18#include <set> 19 20namespace llvm { 21 22class Type; 23class Value; 24 25class FindUsedTypes : public ModulePass { 26 std::set<const Type *> UsedTypes; 27public: 28 static char ID; // Pass identification, replacement for typeid 29 FindUsedTypes() : ModulePass(&ID) {} 30 31 /// getTypes - After the pass has been run, return the set containing all of 32 /// the types used in the module. 33 /// 34 const std::set<const Type *> &getTypes() const { return UsedTypes; } 35 36 /// Print the types found in the module. If the optional Module parameter is 37 /// passed in, then the types are printed symbolically if possible, using the 38 /// symbol table from the module. 39 /// 40 void print(std::ostream &o, const Module *M) const; 41 void print(std::ostream *o, const Module *M) const { if (o) print(*o, M); } 42 43private: 44 /// IncorporateType - Incorporate one type and all of its subtypes into the 45 /// collection of used types. 46 /// 47 void IncorporateType(const Type *Ty); 48 49 /// IncorporateValue - Incorporate all of the types used by this value. 50 /// 51 void IncorporateValue(const Value *V); 52 53public: 54 /// run - This incorporates all types used by the specified module 55 bool runOnModule(Module &M); 56 57 /// getAnalysisUsage - We do not modify anything. 58 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 59 AU.setPreservesAll(); 60 } 61}; 62 63} // End llvm namespace 64 65#endif 66