1 //===-- llvm/IR/TypeFinder.h - Class to find used struct types --*- 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 file contains the declaration of the TypeFinder class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_IR_TYPEFINDER_H 15 #define LLVM_IR_TYPEFINDER_H 16 17 #include "llvm/ADT/DenseSet.h" 18 #include <vector> 19 20 namespace llvm { 21 22 class MDNode; 23 class Module; 24 class StructType; 25 class Type; 26 class Value; 27 28 /// TypeFinder - Walk over a module, identifying all of the types that are 29 /// used by the module. 30 class TypeFinder { 31 // To avoid walking constant expressions multiple times and other IR 32 // objects, we keep several helper maps. 33 DenseSet<const Value*> VisitedConstants; 34 DenseSet<const MDNode *> VisitedMetadata; 35 DenseSet<Type*> VisitedTypes; 36 37 std::vector<StructType*> StructTypes; 38 bool OnlyNamed; 39 40 public: 41 TypeFinder() : OnlyNamed(false) {} 42 43 void run(const Module &M, bool onlyNamed); 44 void clear(); 45 46 typedef std::vector<StructType*>::iterator iterator; 47 typedef std::vector<StructType*>::const_iterator const_iterator; 48 49 iterator begin() { return StructTypes.begin(); } 50 iterator end() { return StructTypes.end(); } 51 52 const_iterator begin() const { return StructTypes.begin(); } 53 const_iterator end() const { return StructTypes.end(); } 54 55 bool empty() const { return StructTypes.empty(); } 56 size_t size() const { return StructTypes.size(); } 57 iterator erase(iterator I, iterator E) { return StructTypes.erase(I, E); } 58 59 StructType *&operator[](unsigned Idx) { return StructTypes[Idx]; } 60 61 private: 62 /// incorporateType - This method adds the type to the list of used 63 /// structures if it's not in there already. 64 void incorporateType(Type *Ty); 65 66 /// incorporateValue - This method is used to walk operand lists finding types 67 /// hiding in constant expressions and other operands that won't be walked in 68 /// other ways. GlobalValues, basic blocks, instructions, and inst operands 69 /// are all explicitly enumerated. 70 void incorporateValue(const Value *V); 71 72 /// incorporateMDNode - This method is used to walk the operands of an MDNode 73 /// to find types hiding within. 74 void incorporateMDNode(const MDNode *V); 75 }; 76 77 } // end llvm namespace 78 79 #endif 80
