InternalLinkage, ///< Rename collisions when linking (static functions).
PrivateLinkage, ///< Like Internal, but omit from symbol table.
LinkerPrivateLinkage, ///< Like Private, but linker removes.
+ LinkerPrivateWeakLinkage, ///< Like LinkerPrivate, but weak.
+ LinkerPrivateWeakDefAutoLinkage, ///< Like LinkerPrivateWeak, but possibly
+ /// hidden.
DLLImportLinkage, ///< Function to be imported from DLL
DLLExportLinkage, ///< Function to be accessible from DLL.
ExternalWeakLinkage,///< ExternalWeak linkage description.
};
protected:
- GlobalValue(const Type *ty, ValueTy vty, Use *Ops, unsigned NumOps,
+ GlobalValue(Type *ty, ValueTy vty, Use *Ops, unsigned NumOps,
LinkageTypes linkage, const Twine &Name)
: Constant(ty, vty, Ops, NumOps), Parent(0),
- Linkage(linkage), Visibility(DefaultVisibility), Alignment(0) {
+ Linkage(linkage), Visibility(DefaultVisibility), Alignment(0),
+ UnnamedAddr(0) {
setName(Name);
}
LinkageTypes Linkage : 5; // The linkage of this global
unsigned Visibility : 2; // The visibility style of this global
unsigned Alignment : 16; // Alignment of this symbol, must be power of two
+ unsigned UnnamedAddr : 1; // This value's address is not significant
std::string Section; // Section to emit this into, empty mean default
public:
~GlobalValue() {
removeDeadConstantUsers(); // remove any dead constants using this.
}
- unsigned getAlignment() const { return Alignment; }
- void setAlignment(unsigned Align) {
- assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
- Alignment = Align;
+ unsigned getAlignment() const {
+ return (1u << Alignment) >> 1;
}
+ void setAlignment(unsigned Align);
+
+ bool hasUnnamedAddr() const { return UnnamedAddr; }
+ void setUnnamedAddr(bool Val) { UnnamedAddr = Val; }
VisibilityTypes getVisibility() const { return VisibilityTypes(Visibility); }
bool hasDefaultVisibility() const { return Visibility == DefaultVisibility; }
bool use_empty_except_constants();
/// getType - Global values are always pointers.
- inline const PointerType *getType() const {
- return reinterpret_cast<const PointerType*>(User::getType());
+ inline PointerType *getType() const {
+ return reinterpret_cast<PointerType*>(User::getType());
}
static LinkageTypes getLinkOnceLinkage(bool ODR) {
return Linkage == PrivateLinkage;
}
static bool isLinkerPrivateLinkage(LinkageTypes Linkage) {
- return Linkage==LinkerPrivateLinkage;
+ return Linkage == LinkerPrivateLinkage;
+ }
+ static bool isLinkerPrivateWeakLinkage(LinkageTypes Linkage) {
+ return Linkage == LinkerPrivateWeakLinkage;
+ }
+ static bool isLinkerPrivateWeakDefAutoLinkage(LinkageTypes Linkage) {
+ return Linkage == LinkerPrivateWeakDefAutoLinkage;
}
static bool isLocalLinkage(LinkageTypes Linkage) {
return isInternalLinkage(Linkage) || isPrivateLinkage(Linkage) ||
- isLinkerPrivateLinkage(Linkage);
+ isLinkerPrivateLinkage(Linkage) || isLinkerPrivateWeakLinkage(Linkage) ||
+ isLinkerPrivateWeakDefAutoLinkage(Linkage);
}
static bool isDLLImportLinkage(LinkageTypes Linkage) {
return Linkage == DLLImportLinkage;
/// by something non-equivalent at link time. For example, if a function has
/// weak linkage then the code defining it may be replaced by different code.
static bool mayBeOverridden(LinkageTypes Linkage) {
- return (Linkage == WeakAnyLinkage ||
- Linkage == LinkOnceAnyLinkage ||
- Linkage == CommonLinkage ||
- Linkage == ExternalWeakLinkage);
+ return Linkage == WeakAnyLinkage ||
+ Linkage == LinkOnceAnyLinkage ||
+ Linkage == CommonLinkage ||
+ Linkage == ExternalWeakLinkage ||
+ Linkage == LinkerPrivateWeakLinkage ||
+ Linkage == LinkerPrivateWeakDefAutoLinkage;
}
/// isWeakForLinker - Whether the definition of this global may be replaced at
- /// link time.
+ /// link time. NB: Using this method outside of the code generators is almost
+ /// always a mistake: when working at the IR level use mayBeOverridden instead
+ /// as it knows about ODR semantics.
static bool isWeakForLinker(LinkageTypes Linkage) {
- return (Linkage == AvailableExternallyLinkage ||
- Linkage == WeakAnyLinkage ||
- Linkage == WeakODRLinkage ||
- Linkage == LinkOnceAnyLinkage ||
- Linkage == LinkOnceODRLinkage ||
- Linkage == CommonLinkage ||
- Linkage == ExternalWeakLinkage);
+ return Linkage == AvailableExternallyLinkage ||
+ Linkage == WeakAnyLinkage ||
+ Linkage == WeakODRLinkage ||
+ Linkage == LinkOnceAnyLinkage ||
+ Linkage == LinkOnceODRLinkage ||
+ Linkage == CommonLinkage ||
+ Linkage == ExternalWeakLinkage ||
+ Linkage == LinkerPrivateWeakLinkage ||
+ Linkage == LinkerPrivateWeakDefAutoLinkage;
}
bool hasExternalLinkage() const { return isExternalLinkage(Linkage); }
bool hasInternalLinkage() const { return isInternalLinkage(Linkage); }
bool hasPrivateLinkage() const { return isPrivateLinkage(Linkage); }
bool hasLinkerPrivateLinkage() const { return isLinkerPrivateLinkage(Linkage); }
+ bool hasLinkerPrivateWeakLinkage() const {
+ return isLinkerPrivateWeakLinkage(Linkage);
+ }
+ bool hasLinkerPrivateWeakDefAutoLinkage() const {
+ return isLinkerPrivateWeakDefAutoLinkage(Linkage);
+ }
bool hasLocalLinkage() const { return isLocalLinkage(Linkage); }
bool hasDLLImportLinkage() const { return isDLLImportLinkage(Linkage); }
bool hasDLLExportLinkage() const { return isDLLExportLinkage(Linkage); }
/// @}
- /// Override from Constant class. No GlobalValue's are null values so this
- /// always returns false.
- virtual bool isNullValue() const { return false; }
-
/// Override from Constant class.
virtual void destroyConstant();
/// isDeclaration - Return true if the primary definition of this global
- /// value is outside of the current translation unit...
- virtual bool isDeclaration() const = 0;
+ /// value is outside of the current translation unit.
+ bool isDeclaration() const;
/// removeFromParent - This method unlinks 'this' from the containing module,
/// but does not delete it.
inline Module *getParent() { return Parent; }
inline const Module *getParent() const { return Parent; }
- /// removeDeadConstantUsers - If there are any dead constant users dangling
- /// off of this global value, remove them. This method is useful for clients
- /// that want to check to see if a global is unused, but don't want to deal
- /// with potentially dead constants hanging off of the globals.
- void removeDeadConstantUsers() const;
-
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const GlobalValue *) { return true; }
static inline bool classof(const Value *V) {
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