//
// 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 is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#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;
-class PointerType;
-template<typename SC> struct ilist_traits;
-template<typename ValueSubClass, typename ItemParentClass, typename SymTabClass,
- typename SubClass> class SymbolTableListTraits;
-
-class GlobalVariable : public GlobalValue {
- friend class SymbolTableListTraits<GlobalVariable, Module, Module,
- ilist_traits<GlobalVariable> >;
+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);
- GlobalVariable *Prev, *Next;
- void setNext(GlobalVariable *N) { Next = N; }
- void setPrev(GlobalVariable *N) { Prev = N; }
-
- bool isConstantGlobal; // Is this a global constant?
- bool isThreadLocalSymbol; // Is this symbol "Thread Local"?
- Use Initializer;
+ 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 std::string &Name = "",
- Module *Parent = 0, bool ThreadLocal = false);
+ 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(const Type *Ty, bool isConstant, LinkageTypes Linkage,
- Constant *Initializer, const std::string &Name,
- GlobalVariable *InsertBefore, bool ThreadLocal = false);
-
+ 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.
///
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();
+ }
+
/// 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 Constant *getInitializer() const {
+ inline /*const FIXME*/ Constant *getInitializer() const {
assert(hasInitializer() && "GV doesn't have initializer!");
- return reinterpret_cast<Constant*>(Initializer.get());
+ return static_cast<Constant*>(Op<0>().get());
}
inline Constant *getInitializer() {
assert(hasInitializer() && "GV doesn't have initializer!");
- return reinterpret_cast<Constant*>(Initializer.get());
- }
- inline void setInitializer(Constant *CPV) {
- if (CPV == 0) {
- if (hasInitializer()) {
- Initializer.set(0);
- NumOperands = 0;
- }
- } else {
- if (!hasInitializer())
- NumOperands = 1;
- Initializer.set(CPV);
- }
+ return static_cast<Constant*>(Op<0>().get());
}
-
- // getNext/Prev - Return the next or previous global variable in the list.
- GlobalVariable *getNext() { return Next; }
- const GlobalVariable *getNext() const { return Next; }
- GlobalVariable *getPrev() { return Prev; }
- const GlobalVariable *getPrev() const { return Prev; }
+ /// setInitializer - Sets the initializer for this global variable, removing
+ /// any existing initializer if InitVal==NULL. If this GV has type T*, the
+ /// initializer must have type T.
+ void setInitializer(Constant *InitVal);
/// If the value is a global constant, its value is immutable throughout the
/// runtime execution of the program. Assigning a value into the constant
/// leads to undefined behavior.
///
bool isConstant() const { return isConstantGlobal; }
- void setConstant(bool Value) { isConstantGlobal = Value; }
+ void setConstant(bool Val) { isConstantGlobal = Val; }
/// If the value is "Thread Local", its value isn't shared by the threads.
bool isThreadLocal() const { return isThreadLocalSymbol; }
- void setThreadLocal(bool Value) { isThreadLocalSymbol = Value; }
+ void setThreadLocal(bool Val) { isThreadLocalSymbol = Val; }
+
+ /// copyAttributesFrom - copy all additional attributes (those not needed to
+ /// create a GlobalVariable) from the GlobalVariable Src to this one.
+ void copyAttributesFrom(const GlobalValue *Src);
/// removeFromParent - This method unlinks 'this' from the containing module,
/// but does not delete it.
///
- void removeFromParent();
+ virtual void removeFromParent();
/// eraseFromParent - This method unlinks 'this' from the containing module
/// and deletes it.
///
- void eraseFromParent();
+ virtual void eraseFromParent();
/// Override Constant's implementation of this method so we can
/// replace constant initializers.
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
- virtual void print(std::ostream &OS) const;
- void print(std::ostream *OS) const { if (OS) print(*OS); }
-
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const GlobalVariable *) { return true; }
static inline bool classof(const Value *V) {
- return V->getValueType() == Value::GlobalVariableVal;
+ return V->getValueID() == Value::GlobalVariableVal;
}
};
+template <>
+struct OperandTraits<GlobalVariable> : public OptionalOperandTraits<> {
+};
+
+DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalVariable, Value)
+
} // End llvm namespace
#endif
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