//
//===----------------------------------------------------------------------===//
//
-// 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.
+/// @file This file contains the declarations for the Module class.
//
//===----------------------------------------------------------------------===//
#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> {
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;
- typedef SetVector<std::string> LibraryListType;
- // Global Variable iterators.
+ /// The type for the list of dependent libraries.
+ typedef std::vector<std::string> LibraryListType;
+
+ /// The Global Variable iterator.
typedef GlobalListType::iterator global_iterator;
+ /// The Global Variable constant iterator.
typedef GlobalListType::const_iterator const_global_iterator;
- // Function iterators.
+ /// The Function iterators.
typedef FunctionListType::iterator iterator;
+ /// The Function constant iterator
typedef FunctionListType::const_iterator const_iterator;
- // Library list iterators.
+ /// 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
- Endianness Endian; // Endianness assumed in the module
- PointerSize PtrSize; // Pointer size assumed in the module
+ 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.
+ ValueSymbolTable *ValSymTab; ///< Symbol table for values
+ TypeSymbolTable *TypeSymTab; ///< Symbol table for types
+ 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; }
- void setModuleIdentifier(const std::string &ID) { ModuleID = ID; }
+ /// 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
+ const 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; }
- void setTargetTriple(const std::string &T) { TargetTriple = T; }
- /// Target endian information...
- Endianness getEndianness() const { return Endian; }
- void setEndianness(Endianness E) { Endian = E; }
+ /// Get the target endian information.
+ /// @returns Endianess - an enumeration for the endianess of the target
+ Endianness getEndianness() const;
- /// Target Pointer Size information...
- PointerSize getPointerSize() const { return PtrSize; }
- void setPointerSize(PointerSize PS) { PtrSize = PS; }
+ /// Get the target pointer size.
+ /// @returns PointerSize - an enumeration for the size of the target's pointer
+ PointerSize getPointerSize() const;
- // Access to any module-scope inline asm blocks.
+ /// 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(const std::string& DL) { DataLayout = DL; }
+
+ /// Set the target triple.
+ void setTargetTriple(const std::string &T) { TargetTriple = T; }
+
+ /// Set the module-scope inline assembly blocks.
void setModuleInlineAsm(const std::string &Asm) { GlobalScopeAsm = Asm; }
- //===--------------------------------------------------------------------===//
- // Methods for easy access to the functions in the module.
- //
-
+/// @}
+/// @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);
+ /// table. Four possibilities:
+ /// 1. If it does not exist, add a prototype for the function and return it.
+ /// 2. If it exists, and has internal linkage, the existing function is
+ /// renamed and a new one is inserted.
+ /// 3. Otherwise, if the existing function has the correct prototype, return
+ /// the existing function.
+ /// 4. Finally, the function exists but has the wrong prototype: return the
+ /// function with a constantexpr cast to the right prototype.
+ Constant *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,...)
+ Constant *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);
+ Function *getFunction(const std::string &Name) const;
/// 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();
+ Function *getMainFunction() { return getFunction("main"); }
/// 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.
- //
+ Function *getNamedFunction(const std::string &Name) const {
+ return getFunction(Name);
+ }
+/// @}
+/// @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);
+ GlobalVariable *getGlobalVariable(const std::string &Name,
+ bool AllowInternal = false) const;
/// 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);
+ GlobalVariable *getNamedGlobal(const std::string &Name) const {
+ return getGlobalVariable(Name, true);
+ }
-
- //===--------------------------------------------------------------------===//
- // Methods for easy access to the types in the module.
- //
-
+/// @}
+/// @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;
-
- //===--------------------------------------------------------------------===//
- // Methods for direct access to the globals list, functions list, and symbol
- // table.
- //
-
- // Get the underlying elements of the Module.
- const GlobalListType &getGlobalList() const { return GlobalList; }
- GlobalListType &getGlobalList() { return GlobalList; }
- const FunctionListType &getFunctionList() const { return FunctionList; }
- FunctionListType &getFunctionList() { return FunctionList; }
-
- /// getSymbolTable() - Get access to the symbol table for the module, where
- /// global variables and functions are identified.
- ///
- SymbolTable &getSymbolTable() { return *SymTab; }
- const SymbolTable &getSymbolTable() const { return *SymTab; }
-
-
- //===--------------------------------------------------------------------===//
- // Module iterator forwarding functions
- //
- // Globals list interface
+/// @}
+/// @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 ValueSymbolTable &getValueSymbolTable() const { return *ValSymTab; }
+ /// Get the Module's symbol table of global variable and function identifiers.
+ ValueSymbolTable &getValueSymbolTable() { return *ValSymTab; }
+ /// Get the symbol table of types
+ const TypeSymbolTable &getTypeSymbolTable() const { return *TypeSymTab; }
+ /// Get the Module's symbol table of types
+ TypeSymbolTable &getTypeSymbolTable() { return *TypeSymTab; }
+
+/// @}
+/// @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(); }
- // FunctionList interface
+/// @}
+/// @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(); }
- //===--------------------------------------------------------------------===//
- // List of dependent library access functions
-
+/// @}
+/// @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); }
-
+ void addLibrary(const std::string& Lib);
/// @brief Remove a library from the list of dependent libraries
- inline void removeLibrary(const std::string& Lib) { LibraryList.remove(Lib); }
-
+ void removeLibrary(const std::string& Lib);
/// @brief Get all the libraries
inline const LibraryListType& getLibraries() const { return LibraryList; }
- //===--------------------------------------------------------------------===//
- // Utility functions for printing and dumping Module objects
-
+/// @}
+/// @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); }
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
+ /// Print the module to an output stream with AssemblyAnnotationWriter.
void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
-
+ void print(std::ostream *OS, AssemblyAnnotationWriter *AAW) const {
+ if (OS) print(*OS, AAW);
+ }
+ /// Dump the module to std::cerr (for debugging).
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.
- ///
+ /// 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;
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