FindUsedTypes.h revision 9ccaf53ada99c63737547c0235baeb8454b04e80 
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(raw_ostream &o, const Module *M) const;
41
42private:
43  /// IncorporateType - Incorporate one type and all of its subtypes into the
44  /// collection of used types.
45  ///
46  void IncorporateType(const Type *Ty);
47
48  /// IncorporateValue - Incorporate all of the types used by this value.
49  ///
50  void IncorporateValue(const Value *V);
51
52public:
53  /// run - This incorporates all types used by the specified module
54  bool runOnModule(Module &M);
55
56  /// getAnalysisUsage - We do not modify anything.
57  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
58    AU.setPreservesAll();
59  }
60};
61
62} // End llvm namespace
63
64#endif
65