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//===-- 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.
// This file contains the declarations for the Module class that is used to
// maintain all the information related to a VM module.
// A module also 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.
#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);
class Module {
typedef iplist<GlobalVariable> GlobalListType;
typedef iplist<Function> FunctionListType;
typedef SetVector<std::string> LibraryListType;
// Global Variable iterators.
typedef GlobalListType::iterator global_iterator;
typedef GlobalListType::const_iterator const_global_iterator;
// Function iterators.
typedef FunctionListType::iterator iterator;
typedef FunctionListType::const_iterator const_iterator;
// Library list iterators.
typedef LibraryListType::const_iterator lib_iterator;
enum Endianness { AnyEndianness, LittleEndian, BigEndian };
enum PointerSize { AnyPointerSize, Pointer32, Pointer64 };
GlobalListType GlobalList; // The Global Variables in the module
FunctionListType FunctionList; // The Functions in the module
LibraryListType LibraryList; // The Libraries needed by the module
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
// These flags are probably not the right long-term way to handle this kind of
// target information, but it is sufficient for now.
Endianness Endian; // True if target is little endian
PointerSize PtrSize; // True if target has 32-bit pointers (false = 64-bit)
friend class Constant;
Module(const std::string &ModuleID);
const std::string &getModuleIdentifier() const { return ModuleID; }
void setModuleIdentifier(const std::string &ID) { ModuleID = ID; }
const std::string &getTargetTriple() const { return TargetTriple; }
void setTargetTriple(const std::string &T) { TargetTriple = T; }
/// Target endian information...
Endianness getEndianness() const { return Endian; }
void setEndianness(Endianness E) { Endian = E; }
/// Target Pointer Size information...
PointerSize getPointerSize() const { return PtrSize; }
void setPointerSize(PointerSize PS) { PtrSize = PS; }
// Methods for easy access to the functions in the module.
/// 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,...)
/// 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);
// Methods for easy access to the global variables in the module.
/// getGlobalVariable - Look up the specified global variable in the module
/// symbol table. If it does not exist, return null. Note that this only
/// returns a global variable if it does not have internal linkage. 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.
GlobalVariable *getGlobalVariable(const std::string &Name, const Type *Ty);
// Methods for easy access to the types in the module.
/// 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;
// Methods for direct access to the globals list, functions list, and symbol
// table.
/// Get the underlying elements of the Module...
inline const GlobalListType &getGlobalList() const { return GlobalList; }
inline GlobalListType &getGlobalList() { return GlobalList; }
inline const FunctionListType &getFunctionList() const { return FunctionList;}
inline FunctionListType &getFunctionList() { return FunctionList;}
/// getSymbolTable() - Get access to the symbol table for the module, where
/// global variables and functions are identified.
inline SymbolTable &getSymbolTable() { return *SymTab; }
inline const SymbolTable &getSymbolTable() const { return *SymTab; }
// Module iterator forwarding functions
// Globals list interface
global_iterator global_begin() { return GlobalList.begin(); }
const_global_iterator global_begin() const { return GlobalList.begin(); }
global_iterator global_end () { return GlobalList.end(); }
const_global_iterator global_end () const { return GlobalList.end(); }
bool global_empty() const { return GlobalList.empty(); }
// FunctionList interface
inline iterator begin() { return FunctionList.begin(); }
inline const_iterator begin() const { return FunctionList.begin(); }
inline iterator end () { return FunctionList.end(); }
inline const_iterator end () const { return FunctionList.end(); }
inline size_t size() const { return FunctionList.size(); }
inline bool empty() const { return FunctionList.empty(); }
// List of dependent library access functions
/// @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; }
// Utility functions for printing and dumping Module objects
void print(std::ostream &OS) const { print(OS, 0); }
void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
void dump() const;
/// dropAllReferences() - 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();
inline std::ostream &operator<<(std::ostream &O, const Module &M) {
return O;
} // End llvm namespace