1 //===-- llvm/IR/TypeFinder.h - Class to find used struct types --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the declaration of the TypeFinder class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_IR_TYPEFINDER_H
15 #define LLVM_IR_TYPEFINDER_H
17 #include "llvm/ADT/DenseSet.h"
28 /// TypeFinder - Walk over a module, identifying all of the types that are
29 /// used by the module.
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<Type*> VisitedTypes;
36 std::vector<StructType*> StructTypes;
40 TypeFinder() : OnlyNamed(false) {}
42 void run(const Module &M, bool onlyNamed);
45 typedef std::vector<StructType*>::iterator iterator;
46 typedef std::vector<StructType*>::const_iterator const_iterator;
48 iterator begin() { return StructTypes.begin(); }
49 iterator end() { return StructTypes.end(); }
51 const_iterator begin() const { return StructTypes.begin(); }
52 const_iterator end() const { return StructTypes.end(); }
54 bool empty() const { return StructTypes.empty(); }
55 size_t size() const { return StructTypes.size(); }
56 iterator erase(iterator I, iterator E) { return StructTypes.erase(I, E); }
58 StructType *&operator[](unsigned Idx) { return StructTypes[Idx]; }
61 /// incorporateType - This method adds the type to the list of used
62 /// structures if it's not in there already.
63 void incorporateType(Type *Ty);
65 /// incorporateValue - This method is used to walk operand lists finding types
66 /// hiding in constant expressions and other operands that won't be walked in
67 /// other ways. GlobalValues, basic blocks, instructions, and inst operands
68 /// are all explicitly enumerated.
69 void incorporateValue(const Value *V);
71 /// incorporateMDNode - This method is used to walk the operands of an MDNode
72 /// to find types hiding within.
73 void incorporateMDNode(const MDNode *V);
76 } // end llvm namespace