#ifndef LLVM_GLOBALVALUE_H
#define LLVM_GLOBALVALUE_H
-#include "llvm/User.h"
+#include "llvm/Constant.h"
namespace llvm {
class PointerType;
class Module;
-class GlobalValue : public User {
+class GlobalValue : public Constant {
GlobalValue(const GlobalValue &); // do not implement
public:
enum LinkageTypes {
protected:
GlobalValue(const Type *Ty, ValueTy vty, LinkageTypes linkage,
const std::string &name = "")
- : User(Ty, vty, name), Linkage(linkage), Parent(0) {}
+ : Constant(Ty, vty, name), Linkage(linkage), Parent(0) { }
LinkageTypes Linkage; // The linkage of this global
Module *Parent;
public:
- ~GlobalValue() {}
+ virtual ~GlobalValue();
+
+ /// If the usage is empty (except transitively dead constants), then this
+ /// global value can can be safely deleted since the destructor wll
+ /// delete the dead constants as well.
+ /// @brief Determine if theusage of this global value is empty except
+ /// for transitively dead constants.
+ bool use_empty_except_constants();
/// getType - Global values are always pointers.
inline const PointerType *getType() const {
void setLinkage(LinkageTypes LT) { Linkage = LT; }
LinkageTypes getLinkage() const { return Linkage; }
+ /// Override from Constant class. No GlobalValue's have null values so
+ /// this always returns false.
+ virtual bool isNullValue() const { return false; }
+
+ /// Override from Constant class.
+ virtual void destroyConstant();
+
/// isExternal - Return true if the primary definition of this global value is
/// outside of the current translation unit...
virtual bool isExternal() const = 0;