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/ADT/SetVector.h"
18 #include "llvm/Pass.h"
19 
20 namespace llvm {
21 
22 class Type;
23 class Value;
24 
25 class FindUsedTypes : public ModulePass {
26   SetVector<Type *> UsedTypes;
27 public:
28   static char ID; // Pass identification, replacement for typeid
FindUsedTypes()29   FindUsedTypes() : ModulePass(ID) {
30     initializeFindUsedTypesPass(*PassRegistry::getPassRegistry());
31   }
32 
33   /// getTypes - After the pass has been run, return the set containing all of
34   /// the types used in the module.
35   ///
getTypes()36   const SetVector<Type *> &getTypes() const { return UsedTypes; }
37 
38   /// Print the types found in the module.  If the optional Module parameter is
39   /// passed in, then the types are printed symbolically if possible, using the
40   /// symbol table from the module.
41   ///
42   void print(raw_ostream &o, const Module *M) const;
43 
44 private:
45   /// IncorporateType - Incorporate one type and all of its subtypes into the
46   /// collection of used types.
47   ///
48   void IncorporateType(Type *Ty);
49 
50   /// IncorporateValue - Incorporate all of the types used by this value.
51   ///
52   void IncorporateValue(const Value *V);
53 
54 public:
55   /// run - This incorporates all types used by the specified module
56   bool runOnModule(Module &M);
57 
58   /// getAnalysisUsage - We do not modify anything.
getAnalysisUsage(AnalysisUsage & AU)59   virtual void getAnalysisUsage(AnalysisUsage &AU) const {
60     AU.setPreservesAll();
61   }
62 };
63 
64 } // End llvm namespace
65 
66 #endif
67