<commit_before>//===-- 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.
//
//===----------------------------------------------------------------------===//

#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);
};

class Module {
public:
  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 };

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

  friend class Constant;

public:
  Module(const std::string &ModuleID);
  ~Module();

  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; }

  // Access to any module-scope inline asm blocks.
  const std::string &getModuleInlineAsm() const { return GlobalScopeAsm; }
  void setModuleInlineAsm(const std::string &Asm) { GlobalScopeAsm = Asm; }
  
  //===--------------------------------------------------------------------===//
  // 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,...)
    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);

  //===--------------------------------------------------------------------===//
  // 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.  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);


  //===--------------------------------------------------------------------===//
  // 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;<commit_msg>add a new helper method<commit_after>//===-- 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.
//
//===----------------------------------------------------------------------===//

#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);
};

class Module {
public:
  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 };

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

  friend class Constant;

public:
  Module(const std::string &ModuleID);
  ~Module();

  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; }

  // Access to any module-scope inline asm blocks.
  const std::string &getModuleInlineAsm() const { return GlobalScopeAsm; }
  void setModuleInlineAsm(const std::string &Asm) { GlobalScopeAsm = Asm; }
  
  //===--------------------------------------------------------------------===//
  // 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,...)
    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);

  //===--------------------------------------------------------------------===//
  // 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.  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);
  

  //===--------------------------------------------------------------------===//
  // 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;
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