1 //===-- llvm/Module.h - C++ class to represent a VM module ------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the declarations for the Module class that is used to
11 // maintain all the information related to a VM module.
13 // A module also maintains a GlobalValRefMap object that is used to hold all
14 // constant references to global variables in the module. When a global
15 // variable is destroyed, it should have no entries in the GlobalValueRefMap.
17 //===----------------------------------------------------------------------===//
22 #include "llvm/Function.h"
23 #include "llvm/GlobalVariable.h"
24 #include "llvm/ADT/SetVector.h"
29 class GlobalValueRefMap; // Used by ConstantVals.cpp
30 class ConstantPointerRef;
34 template<> struct ilist_traits<Function>
35 : public SymbolTableListTraits<Function, Module, Module> {
36 // createNode is used to create a node that marks the end of the list...
37 static Function *createNode();
38 static iplist<Function> &getList(Module *M);
40 template<> struct ilist_traits<GlobalVariable>
41 : public SymbolTableListTraits<GlobalVariable, Module, Module> {
42 // createNode is used to create a node that marks the end of the list...
43 static GlobalVariable *createNode();
44 static iplist<GlobalVariable> &getList(Module *M);
49 typedef iplist<GlobalVariable> GlobalListType;
50 typedef iplist<Function> FunctionListType;
51 typedef SetVector<std::string> LibraryListType;
52 typedef std::vector<std::string> PassListType;
54 // Global Variable iterators...
55 typedef GlobalListType::iterator giterator;
56 typedef GlobalListType::const_iterator const_giterator;
57 typedef std::reverse_iterator<giterator> reverse_giterator;
58 typedef std::reverse_iterator<const_giterator> const_reverse_giterator;
60 // Function iterators...
61 typedef FunctionListType::iterator iterator;
62 typedef FunctionListType::const_iterator const_iterator;
63 typedef std::reverse_iterator<iterator> reverse_iterator;
64 typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
66 // Library list iterators
67 typedef LibraryListType::const_iterator lib_iterator;
69 // Link-time Pass list iterators
70 typedef PassListType::const_iterator pass_iterator;
72 enum Endianness { AnyEndianness, LittleEndian, BigEndian };
73 enum PointerSize { AnyPointerSize, Pointer32, Pointer64 };
76 GlobalListType GlobalList; // The Global Variables in the module
77 FunctionListType FunctionList; // The Functions in the module
78 LibraryListType LibraryList; // The Libraries needed by the module
79 PassListType PassList; // The Passes needed by the module at link time
80 SymbolTable *SymTab; // Symbol Table for the module
81 std::string ModuleID; // Human readable identifier for the module
82 std::string TargetTriple; // Platform target triple Module compiled on
84 // These flags are probably not the right long-term way to handle this kind of
85 // target information, but it is sufficient for now.
86 Endianness Endian; // True if target is little endian
87 PointerSize PtrSize; // True if target has 32-bit pointers (false = 64-bit)
89 // Accessor for the underlying GVRefMap... only through the Constant class...
90 friend class Constant;
91 friend class ConstantPointerRef;
92 ConstantPointerRef *getConstantPointerRef(GlobalValue *GV);
93 void destroyConstantPointerRef(ConstantPointerRef *CPR);
96 Module(const std::string &ModuleID);
99 const std::string& getModuleIdentifier() const { return ModuleID; }
100 const std::string& getTargetTriple() const { return TargetTriple; }
101 void setTargetTriple(const std::string& T) { TargetTriple = T; }
103 /// Target endian information...
104 Endianness getEndianness() const { return Endian; }
105 void setEndianness(Endianness E) { Endian = E; }
107 /// Target Pointer Size information...
108 PointerSize getPointerSize() const { return PtrSize; }
109 void setPointerSize(PointerSize PS) { PtrSize = PS; }
111 //===--------------------------------------------------------------------===//
112 // Methods for easy access to the functions in the module.
115 /// getOrInsertFunction - Look up the specified function in the module symbol
116 /// table. If it does not exist, add a prototype for the function and return
118 Function *getOrInsertFunction(const std::string &Name, const FunctionType *T);
120 /// getOrInsertFunction - Look up the specified function in the module symbol
121 /// table. If it does not exist, add a prototype for the function and return
122 /// it. This version of the method takes a null terminated list of function
123 /// arguments, which makes it easier for clients to use.
124 Function *getOrInsertFunction(const std::string &Name, const Type *RetTy,...);
126 /// getFunction - Look up the specified function in the module symbol table.
127 /// If it does not exist, return null.
129 Function *getFunction(const std::string &Name, const FunctionType *Ty);
131 /// getMainFunction - This function looks up main efficiently. This is such a
132 /// common case, that it is a method in Module. If main cannot be found, a
133 /// null pointer is returned.
135 Function *getMainFunction();
137 /// getNamedFunction - Return the first function in the module with the
138 /// specified name, of arbitrary type. This method returns null if a function
139 /// with the specified name is not found.
141 Function *getNamedFunction(const std::string &Name);
143 //===--------------------------------------------------------------------===//
144 // Methods for easy access to the global variables in the module.
147 /// getGlobalVariable - Look up the specified global variable in the module
148 /// symbol table. If it does not exist, return null. Note that this only
149 /// returns a global variable if it does not have internal linkage. The type
150 /// argument should be the underlying type of the global, ie, it should not
151 /// have the top-level PointerType, which represents the address of the
154 GlobalVariable *getGlobalVariable(const std::string &Name, const Type *Ty);
157 //===--------------------------------------------------------------------===//
158 // Methods for easy access to the types in the module.
161 /// addTypeName - Insert an entry in the symbol table mapping Str to Type. If
162 /// there is already an entry for this name, true is returned and the symbol
163 /// table is not modified.
165 bool addTypeName(const std::string &Name, const Type *Ty);
167 /// getTypeName - If there is at least one entry in the symbol table for the
168 /// specified type, return it.
170 std::string getTypeName(const Type *Ty) const;
172 /// getTypeByName - Return the type with the specified name in this module, or
173 /// null if there is none by that name.
174 const Type *getTypeByName(const std::string &Name) const;
177 //===--------------------------------------------------------------------===//
178 // Methods for direct access to the globals list, functions list, and symbol
182 /// Get the underlying elements of the Module...
183 inline const GlobalListType &getGlobalList() const { return GlobalList; }
184 inline GlobalListType &getGlobalList() { return GlobalList; }
185 inline const FunctionListType &getFunctionList() const { return FunctionList;}
186 inline FunctionListType &getFunctionList() { return FunctionList;}
188 /// getSymbolTable() - Get access to the symbol table for the module, where
189 /// global variables and functions are identified.
191 inline SymbolTable &getSymbolTable() { return *SymTab; }
192 inline const SymbolTable &getSymbolTable() const { return *SymTab; }
195 //===--------------------------------------------------------------------===//
196 // Module iterator forwarding functions
198 // Globals list interface
199 inline giterator gbegin() { return GlobalList.begin(); }
200 inline const_giterator gbegin() const { return GlobalList.begin(); }
201 inline giterator gend () { return GlobalList.end(); }
202 inline const_giterator gend () const { return GlobalList.end(); }
204 inline reverse_giterator grbegin() { return GlobalList.rbegin(); }
205 inline const_reverse_giterator grbegin() const { return GlobalList.rbegin(); }
206 inline reverse_giterator grend () { return GlobalList.rend(); }
207 inline const_reverse_giterator grend () const { return GlobalList.rend(); }
209 inline unsigned gsize() const { return GlobalList.size(); }
210 inline bool gempty() const { return GlobalList.empty(); }
211 inline const GlobalVariable &gfront() const { return GlobalList.front(); }
212 inline GlobalVariable &gfront() { return GlobalList.front(); }
213 inline const GlobalVariable &gback() const { return GlobalList.back(); }
214 inline GlobalVariable &gback() { return GlobalList.back(); }
216 // FunctionList interface
217 inline iterator begin() { return FunctionList.begin(); }
218 inline const_iterator begin() const { return FunctionList.begin(); }
219 inline iterator end () { return FunctionList.end(); }
220 inline const_iterator end () const { return FunctionList.end(); }
222 inline reverse_iterator rbegin() { return FunctionList.rbegin(); }
223 inline const_reverse_iterator rbegin() const { return FunctionList.rbegin(); }
224 inline reverse_iterator rend () { return FunctionList.rend(); }
225 inline const_reverse_iterator rend () const { return FunctionList.rend(); }
227 inline unsigned size() const { return FunctionList.size(); }
228 inline bool empty() const { return FunctionList.empty(); }
229 inline const Function &front() const { return FunctionList.front(); }
230 inline Function &front() { return FunctionList.front(); }
231 inline const Function &back() const { return FunctionList.back(); }
232 inline Function &back() { return FunctionList.back(); }
234 //===--------------------------------------------------------------------===//
235 // List of dependent library access functions
237 /// @brief Get a constant iterator to beginning of dependent library list.
238 inline lib_iterator lib_begin() const { return LibraryList.begin(); }
240 /// @brief Get a constant iterator to end of dependent library list.
241 inline lib_iterator lib_end() const { return LibraryList.end(); }
243 /// @brief Returns the number of items in the list of libraries.
244 inline unsigned lib_size() const { return LibraryList.size(); }
246 /// @brief Add a library to the list of dependent libraries
247 inline void addLibrary(const std::string& Lib){ LibraryList.insert(Lib); }
249 /// @brief Remove a library from the list of dependent libraries
250 inline void removeLibrary(const std::string& Lib) { LibraryList.remove(Lib); }
252 /// @brief Get all the libraries
253 inline const LibraryListType& getLibraries() const { return LibraryList; }
255 //===--------------------------------------------------------------------===//
256 // Access functions for Link-time pass list
258 /// @brief Get a constant iterator to beginning of pass list.
259 inline pass_iterator pass_begin() const { return PassList.begin(); }
261 /// @brief Get a constant iterator to end of pass list.
262 inline pass_iterator pass_end() const { return PassList.end(); }
264 /// @brief Returns the number of items in the list of passes.
265 inline unsigned pass_size() const { return PassList.size(); }
267 /// @brief Add a library to the list of passes
268 inline void addPass(const std::string& Pass){ PassList.push_back(Pass); }
270 /// @brief Remove a library from the list of passes
271 void removePass(const std::string& Lib);
273 /// @brief Get all the passes
274 inline const PassListType& getPasses() const { return PassList; }
276 //===--------------------------------------------------------------------===//
277 // Utility functions for printing and dumping Module objects
279 void print(std::ostream &OS) const { print(OS, 0); }
280 void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
284 /// dropAllReferences() - This function causes all the subinstructions to "let
285 /// go" of all references that they are maintaining. This allows one to
286 /// 'delete' a whole class at a time, even though there may be circular
287 /// references... first all references are dropped, and all use counts go to
288 /// zero. Then everything is delete'd for real. Note that no operations are
289 /// valid on an object that has "dropped all references", except operator
292 void dropAllReferences();
295 inline std::ostream &operator<<(std::ostream &O, const Module *M) {
300 inline std::ostream &operator<<(std::ostream &O, const Module &M) {
305 } // End llvm namespace