| //===-- llvm/Module.h - C++ class to represent a VM module ------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by the LLVM research group and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| /// @file This file contains the declarations for the Module class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_MODULE_H |
| #define LLVM_MODULE_H |
| |
| #include "llvm/Function.h" |
| #include "llvm/GlobalVariable.h" |
| #include "llvm/ADT/SetVector.h" |
| #include "llvm/Support/DataTypes.h" |
| |
| namespace llvm { |
| |
| class GlobalVariable; |
| class GlobalValueRefMap; // Used by ConstantVals.cpp |
| class FunctionType; |
| class SymbolTable; |
| |
| template<> struct ilist_traits<Function> |
| : public SymbolTableListTraits<Function, Module, Module> { |
| // createSentinel is used to create a node that marks the end of the list. |
| static Function *createSentinel(); |
| static void destroySentinel(Function *F) { delete F; } |
| static iplist<Function> &getList(Module *M); |
| }; |
| template<> struct ilist_traits<GlobalVariable> |
| : public SymbolTableListTraits<GlobalVariable, Module, Module> { |
| // createSentinel is used to create a node that marks the end of the list. |
| static GlobalVariable *createSentinel(); |
| static void destroySentinel(GlobalVariable *GV) { delete GV; } |
| static iplist<GlobalVariable> &getList(Module *M); |
| }; |
| |
| /// A Module instance is used to store all the information related to an |
| /// LLVM module. Modules are the top level container of all other LLVM |
| /// Intermediate Representation (IR) objects. Each module directly contains a |
| /// list of globals variables, a list of functions, a list of libraries (or |
| /// other modules) this module depends on, a symbol table, and various data |
| /// about the target's characteristics. |
| /// |
| /// A module maintains a GlobalValRefMap object that is used to hold all |
| /// constant references to global variables in the module. When a global |
| /// variable is destroyed, it should have no entries in the GlobalValueRefMap. |
| /// @brief The main container class for the LLVM Intermediate Representation. |
| class Module { |
| /// @name Types And Enumerations |
| /// @{ |
| public: |
| /// The type for the list of global variables. |
| typedef iplist<GlobalVariable> GlobalListType; |
| /// The type for the list of functions. |
| typedef iplist<Function> FunctionListType; |
| |
| /// The type for the list of dependent libraries. |
| typedef SetVector<std::string> LibraryListType; |
| |
| /// The Global Variable iterator. |
| typedef GlobalListType::iterator global_iterator; |
| /// The Global Variable constant iterator. |
| typedef GlobalListType::const_iterator const_global_iterator; |
| |
| /// The Function iterators. |
| typedef FunctionListType::iterator iterator; |
| /// The Function constant iterator |
| typedef FunctionListType::const_iterator const_iterator; |
| |
| /// The Library list iterator. |
| typedef LibraryListType::const_iterator lib_iterator; |
| |
| /// An enumeration for describing the endianess of the target machine. |
| enum Endianness { AnyEndianness, LittleEndian, BigEndian }; |
| |
| /// An enumeration for describing the size of a pointer on the target machine. |
| enum PointerSize { AnyPointerSize, Pointer32, Pointer64 }; |
| |
| /// @} |
| /// @name Member Variables |
| /// @{ |
| private: |
| GlobalListType GlobalList; ///< The Global Variables in the module |
| FunctionListType FunctionList; ///< The Functions in the module |
| LibraryListType LibraryList; ///< The Libraries needed by the module |
| std::string GlobalScopeAsm; ///< Inline Asm at global scope. |
| SymbolTable *SymTab; ///< Symbol Table for the module |
| std::string ModuleID; ///< Human readable identifier for the module |
| std::string TargetTriple; ///< Platform target triple Module compiled on |
| std::string DataLayout; ///< Target data description |
| |
| friend class Constant; |
| |
| /// @} |
| /// @name Constructors |
| /// @{ |
| public: |
| /// The Module constructor. Note that there is no default constructor. You |
| /// must provide a name for the module upon construction. |
| Module(const std::string &ModuleID); |
| /// The module destructor. This will dropAllReferences. |
| ~Module(); |
| |
| /// @} |
| /// @name Module Level Accessors |
| /// @{ |
| public: |
| /// Get the module identifier which is, essentially, the name of the module. |
| /// @returns the module identifier as a string |
| const std::string &getModuleIdentifier() const { return ModuleID; } |
| |
| /// Get the data layout string for the module's target platform. This encodes |
| /// the type sizes and alignments expected by this module. |
| /// @returns the data layout as a string |
| std::string getDataLayout() const { return DataLayout; } |
| |
| /// Get the target triple which is a string describing the target host. |
| /// @returns a string containing the target triple. |
| const std::string &getTargetTriple() const { return TargetTriple; } |
| |
| /// Get the target endian information. |
| /// @returns Endianess - an enumeration for the endianess of the target |
| Endianness getEndianness() const; |
| |
| /// Get the target pointer size. |
| /// @returns PointerSize - an enumeration for the size of the target's pointer |
| PointerSize getPointerSize() const; |
| |
| /// Get any module-scope inline assembly blocks. |
| /// @returns a string containing the module-scope inline assembly blocks. |
| const std::string &getModuleInlineAsm() const { return GlobalScopeAsm; } |
| /// @} |
| /// @name Module Level Mutators |
| /// @{ |
| public: |
| |
| /// Set the module identifier. |
| void setModuleIdentifier(const std::string &ID) { ModuleID = ID; } |
| |
| /// Set the data layout |
| void setDataLayout(std::string DL) { DataLayout = DL; } |
| |
| /// Set the target triple. |
| void setTargetTriple(const std::string &T) { TargetTriple = T; } |
| |
| /// Set the target endian information. |
| void setEndianness(Endianness E); |
| |
| /// Set the target pointer size. |
| void setPointerSize(PointerSize PS); |
| |
| /// Set the module-scope inline assembly blocks. |
| void setModuleInlineAsm(const std::string &Asm) { GlobalScopeAsm = Asm; } |
| |
| /// @} |
| /// @name Function Accessors |
| /// @{ |
| public: |
| /// getOrInsertFunction - Look up the specified function in the module symbol |
| /// table. If it does not exist, add a prototype for the function and return |
| /// it. |
| Function *getOrInsertFunction(const std::string &Name, const FunctionType *T); |
| |
| /// getOrInsertFunction - Look up the specified function in the module symbol |
| /// table. If it does not exist, add a prototype for the function and return |
| /// it. This version of the method takes a null terminated list of function |
| /// arguments, which makes it easier for clients to use. |
| Function *getOrInsertFunction(const std::string &Name, const Type *RetTy,...) |
| END_WITH_NULL; |
| |
| /// getFunction - Look up the specified function in the module symbol table. |
| /// If it does not exist, return null. |
| Function *getFunction(const std::string &Name, const FunctionType *Ty); |
| |
| /// getMainFunction - This function looks up main efficiently. This is such a |
| /// common case, that it is a method in Module. If main cannot be found, a |
| /// null pointer is returned. |
| Function *getMainFunction(); |
| |
| /// getNamedFunction - Return the first function in the module with the |
| /// specified name, of arbitrary type. This method returns null if a function |
| /// with the specified name is not found. |
| Function *getNamedFunction(const std::string &Name) const; |
| |
| /// @} |
| /// @name Global Variable Accessors |
| /// @{ |
| public: |
| /// getGlobalVariable - Look up the specified global variable in the module |
| /// symbol table. If it does not exist, return null. The type argument |
| /// should be the underlying type of the global, i.e., it should not have |
| /// the top-level PointerType, which represents the address of the global. |
| /// If AllowInternal is set to true, this function will return types that |
| /// have InternalLinkage. By default, these types are not returned. |
| GlobalVariable *getGlobalVariable(const std::string &Name, const Type *Ty, |
| bool AllowInternal = false); |
| |
| /// getNamedGlobal - Return the first global variable in the module with the |
| /// specified name, of arbitrary type. This method returns null if a global |
| /// with the specified name is not found. |
| GlobalVariable *getNamedGlobal(const std::string &Name) const; |
| |
| /// @} |
| /// @name Type Accessors |
| /// @{ |
| public: |
| /// addTypeName - Insert an entry in the symbol table mapping Str to Type. If |
| /// there is already an entry for this name, true is returned and the symbol |
| /// table is not modified. |
| bool addTypeName(const std::string &Name, const Type *Ty); |
| |
| /// getTypeName - If there is at least one entry in the symbol table for the |
| /// specified type, return it. |
| std::string getTypeName(const Type *Ty) const; |
| |
| /// getTypeByName - Return the type with the specified name in this module, or |
| /// null if there is none by that name. |
| const Type *getTypeByName(const std::string &Name) const; |
| |
| /// @} |
| /// @name Direct access to the globals list, functions list, and symbol table |
| /// @{ |
| public: |
| /// Get the Module's list of global variables (constant). |
| const GlobalListType &getGlobalList() const { return GlobalList; } |
| /// Get the Module's list of global variables. |
| GlobalListType &getGlobalList() { return GlobalList; } |
| /// Get the Module's list of functions (constant). |
| const FunctionListType &getFunctionList() const { return FunctionList; } |
| /// Get the Module's list of functions. |
| FunctionListType &getFunctionList() { return FunctionList; } |
| /// Get the symbol table of global variable and function identifiers |
| const SymbolTable &getSymbolTable() const { return *SymTab; } |
| /// Get the Module's symbol table of global variable and function identifiers. |
| SymbolTable &getSymbolTable() { return *SymTab; } |
| |
| /// @} |
| /// @name Global Variable Iteration |
| /// @{ |
| public: |
| /// Get an iterator to the first global variable |
| global_iterator global_begin() { return GlobalList.begin(); } |
| /// Get a constant iterator to the first global variable |
| const_global_iterator global_begin() const { return GlobalList.begin(); } |
| /// Get an iterator to the last global variable |
| global_iterator global_end () { return GlobalList.end(); } |
| /// Get a constant iterator to the last global variable |
| const_global_iterator global_end () const { return GlobalList.end(); } |
| /// Determine if the list of globals is empty. |
| bool global_empty() const { return GlobalList.empty(); } |
| |
| /// @} |
| /// @name Function Iteration |
| /// @{ |
| public: |
| /// Get an iterator to the first function. |
| iterator begin() { return FunctionList.begin(); } |
| /// Get a constant iterator to the first function. |
| const_iterator begin() const { return FunctionList.begin(); } |
| /// Get an iterator to the last function. |
| iterator end () { return FunctionList.end(); } |
| /// Get a constant iterator to the last function. |
| const_iterator end () const { return FunctionList.end(); } |
| /// Determine how many functions are in the Module's list of functions. |
| size_t size() const { return FunctionList.size(); } |
| /// Determine if the list of functions is empty. |
| bool empty() const { return FunctionList.empty(); } |
| |
| /// @} |
| /// @name Dependent Library Iteration |
| /// @{ |
| public: |
| /// @brief Get a constant iterator to beginning of dependent library list. |
| inline lib_iterator lib_begin() const { return LibraryList.begin(); } |
| /// @brief Get a constant iterator to end of dependent library list. |
| inline lib_iterator lib_end() const { return LibraryList.end(); } |
| /// @brief Returns the number of items in the list of libraries. |
| inline size_t lib_size() const { return LibraryList.size(); } |
| /// @brief Add a library to the list of dependent libraries |
| inline void addLibrary(const std::string& Lib){ LibraryList.insert(Lib); } |
| /// @brief Remove a library from the list of dependent libraries |
| inline void removeLibrary(const std::string& Lib) { LibraryList.remove(Lib); } |
| /// @brief Get all the libraries |
| inline const LibraryListType& getLibraries() const { return LibraryList; } |
| |
| /// @} |
| /// @name Utility functions for printing and dumping Module objects |
| /// @{ |
| public: |
| /// Print the module to an output stream |
| void print(std::ostream &OS) const { print(OS, 0); } |
| /// Print the module to an output stream with AssemblyAnnotationWriter. |
| void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const; |
| /// Dump the module to std::cerr (for debugging). |
| void dump() const; |
| /// This function causes all the subinstructions to "let go" of all references |
| /// that they are maintaining. This allows one to 'delete' a whole class at |
| /// a time, even though there may be circular references... first all |
| /// references are dropped, and all use counts go to zero. Then everything |
| /// is delete'd for real. Note that no operations are valid on an object |
| /// that has "dropped all references", except operator delete. |
| void dropAllReferences(); |
| /// @} |
| }; |
| |
| /// An iostream inserter for modules. |
| inline std::ostream &operator<<(std::ostream &O, const Module &M) { |
| M.print(O); |
| return O; |
| } |
| |
| } // End llvm namespace |
| |
| #endif |