+ // 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 any other instances of the global (this can happen due to weak
+ /// linkage) are guaranteed to have the same initializer.
+ ///
+ /// Note that if you want to transform a global, you must use
+ /// hasUniqueInitializer() instead, because of the *_odr linkage type.
+ ///
+ /// Example:
+ ///
+ /// @a = global SomeType* null - Initializer is both definitive and unique.
+ ///
+ /// @b = global weak SomeType* null - Initializer is neither definitive nor
+ /// unique.
+ ///
+ /// @c = global weak_odr SomeType* null - Initializer is definitive, but not
+ /// unique.
+ inline bool hasDefinitiveInitializer() const {
+ return hasInitializer() &&
+ // The initializer of a global variable with weak linkage may change at
+ // link time.
+ !mayBeOverridden();
+ }
+
+ /// hasUniqueInitializer - Whether the global variable has an initializer, and
+ /// any changes made to the initializer will turn up in the final executable.
+ inline bool hasUniqueInitializer() const {
+ return hasInitializer() &&
+ // It's not safe to modify initializers of global variables with weak
+ // linkage, because the linker might choose to discard the initializer and
+ // use the initializer from another instance of the global variable
+ // instead. It is wrong to modify the initializer of a global variable
+ // with *_odr linkage because then different instances of the global may
+ // have different initializers, breaking the One Definition Rule.
+ !isWeakForLinker();
+ }
+
+ /// getInitializer - Return the initializer for this global variable. It is
+ /// illegal to call this method if the global is external, because we cannot
+ /// tell what the value is initialized to!
+ ///
+ inline /*const FIXME*/ Constant *getInitializer() const {