<commit_before>//===-- llvm/GlobalVariable.h - GlobalVariable class ------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the GlobalVariable class, which
// represents a single global variable (or constant) in the VM.
//
// Global variables are constant pointers that refer to hunks of space that are
// allocated by either the VM, or by the linker in a static compiler.  A global
// variable may have an intial value, which is copied into the executables .data
// area.  Global Constants are required to have initializers.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_GLOBAL_VARIABLE_H
#define LLVM_GLOBAL_VARIABLE_H

#include "llvm/GlobalValue.h"
#include "llvm/OperandTraits.h"
#include "llvm/ADT/ilist_node.h"
#include "llvm/ADT/Twine.h"

namespace llvm {

class Module;
class Constant;
template<typename ValueSubClass, typename ItemParentClass>
  class SymbolTableListTraits;

class GlobalVariable : public GlobalValue, public ilist_node<GlobalVariable> {
  friend class SymbolTableListTraits<GlobalVariable, Module>;
  void *operator new(size_t, unsigned);       // Do not implement
  void operator=(const GlobalVariable &);     // Do not implement
  GlobalVariable(const GlobalVariable &);     // Do not implement

  void setParent(Module *parent);

  bool isConstantGlobal : 1;           // Is this a global constant?
  bool isThreadLocalSymbol : 1;        // Is this symbol "Thread Local"?

public:
  // allocate space for exactly one operand
  void *operator new(size_t s) {
    return User::operator new(s, 1);
  }
  /// GlobalVariable ctor - If a parent module is specified, the global is
  /// automatically inserted into the end of the specified modules global list.
  GlobalVariable(const Type *Ty, bool isConstant, LinkageTypes Linkage,
                 Constant *Initializer = 0, const Twine &Name = "",
                 bool ThreadLocal = false, unsigned AddressSpace = 0);
  /// GlobalVariable ctor - This creates a global and inserts it before the
  /// specified other global.
  GlobalVariable(Module &M, const Type *Ty, bool isConstant,
                 LinkageTypes Linkage, Constant *Initializer,
                 const Twine &Name,
                 GlobalVariable *InsertBefore = 0, bool ThreadLocal = false,
                 unsigned AddressSpace = 0);

  ~GlobalVariable() {
    NumOperands = 1; // FIXME: needed by operator delete
  }

  /// Provide fast operand accessors
  DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);

  /// isDeclaration - Is this global variable lacking an initializer?  If so, 
  /// the global variable is defined in some other translation unit, and is thus
  /// only a declaration here.
  virtual bool isDeclaration() const { return getNumOperands() == 0; }

  /// hasInitializer - Unless a global variable isExternal(), it has an
  /// initializer.  The initializer for the global variable/constant is held by
  /// Initializer if an initializer is specified.
  ///
  inline bool hasInitializer() const { return !isDeclaration(); }

  /// hasDefinitiveInitializer - Whether the global variable has an initializer,
  /// and this is the initializer that will be used in the final executable.
  inline bool hasDefinitiveInitializer() const {
    return hasInitializer() &&
      // The initializer of a global variable with weak linkage may change at
      // link time.
      !mayBeOverridden();
  }<commit_msg>Trailing whitespace.<commit_after>//===-- llvm/GlobalVariable.h - GlobalVariable class ------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the GlobalVariable class, which
// represents a single global variable (or constant) in the VM.
//
// Global variables are constant pointers that refer to hunks of space that are
// allocated by either the VM, or by the linker in a static compiler.  A global
// variable may have an intial value, which is copied into the executables .data
// area.  Global Constants are required to have initializers.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_GLOBAL_VARIABLE_H
#define LLVM_GLOBAL_VARIABLE_H

#include "llvm/GlobalValue.h"
#include "llvm/OperandTraits.h"
#include "llvm/ADT/ilist_node.h"
#include "llvm/ADT/Twine.h"

namespace llvm {

class Module;
class Constant;
template<typename ValueSubClass, typename ItemParentClass>
  class SymbolTableListTraits;

class GlobalVariable : public GlobalValue, public ilist_node<GlobalVariable> {
  friend class SymbolTableListTraits<GlobalVariable, Module>;
  void *operator new(size_t, unsigned);       // Do not implement
  void operator=(const GlobalVariable &);     // Do not implement
  GlobalVariable(const GlobalVariable &);     // Do not implement

  void setParent(Module *parent);

  bool isConstantGlobal : 1;           // Is this a global constant?
  bool isThreadLocalSymbol : 1;        // Is this symbol "Thread Local"?

public:
  // allocate space for exactly one operand
  void *operator new(size_t s) {
    return User::operator new(s, 1);
  }
  /// GlobalVariable ctor - If a parent module is specified, the global is
  /// automatically inserted into the end of the specified modules global list.
  GlobalVariable(const Type *Ty, bool isConstant, LinkageTypes Linkage,
                 Constant *Initializer = 0, const Twine &Name = "",
                 bool ThreadLocal = false, unsigned AddressSpace = 0);
  /// GlobalVariable ctor - This creates a global and inserts it before the
  /// specified other global.
  GlobalVariable(Module &M, const Type *Ty, bool isConstant,
                 LinkageTypes Linkage, Constant *Initializer,
                 const Twine &Name,
                 GlobalVariable *InsertBefore = 0, bool ThreadLocal = false,
                 unsigned AddressSpace = 0);

  ~GlobalVariable() {
    NumOperands = 1; // FIXME: needed by operator delete
  }

  /// Provide fast operand accessors
  DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);

  /// isDeclaration - Is this global variable lacking an initializer?  If so,
  /// the global variable is defined in some other translation unit, and is thus
  /// only a declaration here.
  virtual bool isDeclaration() const { return getNumOperands() == 0; }

  /// hasInitializer - Unless a global variable isExternal(), it has an
  /// initializer.  The initializer for the global variable/constant is held by
  /// Initializer if an initializer is specified.
  ///
  inline bool hasInitializer() const { return !isDeclaration(); }

  /// hasDefinitiveInitializer - Whether the global variable has an initializer,
  /// and this is the initializer that will be used in the final executable.
  inline bool hasDefinitiveInitializer() const {
    return hasInitializer() &&
      // The initializer of a global variable with weak linkage may change at
      // link time.
      !mayBeOverridden();
  }
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