llvm-6502/include/llvm/Module.h
Dan Gohman 423c2260f9 Add the 'explicit' keyword to several constructors that accept one
argument that don't appear intended as implicit-conversion operators.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35280 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-23 18:44:11 +00:00

325 lines
14 KiB
C++

//===-- 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/Support/DataTypes.h"
#include <vector>
namespace llvm {
class GlobalVariable;
class GlobalValueRefMap; // Used by ConstantVals.cpp
class FunctionType;
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 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;
/// 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.
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.
explicit 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
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; }
/// 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(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; }
/// @}
/// @name Function Accessors
/// @{
public:
/// getOrInsertFunction - Look up the specified function in the module symbol
/// 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 function guarantees to return a constant of pointer to the
/// specified function type or a ConstantExpr BitCast of that type if the
/// named /// function has a different type. This version of the method
/// takes a null terminated list of function arguments, which makes it
/// easier for clients to use.
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;
/// @}
/// @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,
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) const {
return getGlobalVariable(Name, true);
}
/// @}
/// @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 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(); }
/// @}
/// @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
void addLibrary(const std::string& Lib);
/// @brief Remove a library from the list of dependent libraries
void removeLibrary(const std::string& 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); }
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;
/// 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