class Module;
class GlobalValue : public Constant {
- GlobalValue(const GlobalValue &); // do not implement
+ GlobalValue(const GlobalValue &) LLVM_DELETED_FUNCTION;
public:
/// @brief An enumeration for the kinds of linkage for global values.
enum LinkageTypes {
AvailableExternallyLinkage, ///< Available for inspection, not emission.
LinkOnceAnyLinkage, ///< Keep one copy of function when linking (inline)
LinkOnceODRLinkage, ///< Same, but only replaced by something equivalent.
+ LinkOnceODRAutoHideLinkage, ///< Like LinkOnceODRLinkage but addr not taken.
WeakAnyLinkage, ///< Keep one copy of named function when linking (weak)
WeakODRLinkage, ///< Same, but only replaced by something equivalent.
AppendingLinkage, ///< Special purpose, only applies to global arrays
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),
- UnnamedAddr(0) {
+ : Constant(ty, vty, Ops, NumOps), Linkage(linkage),
+ Visibility(DefaultVisibility), Alignment(0), UnnamedAddr(0), Parent(0) {
setName(Name);
}
- Module *Parent;
// Note: VC++ treats enums as signed, so an extra bit is required to prevent
// Linkage and Visibility from turning into negative values.
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
+ Module *Parent; // The containing module.
std::string Section; // Section to emit this into, empty mean default
public:
~GlobalValue() {
return Linkage == AvailableExternallyLinkage;
}
static bool isLinkOnceLinkage(LinkageTypes Linkage) {
- return Linkage == LinkOnceAnyLinkage || Linkage == LinkOnceODRLinkage;
+ return Linkage == LinkOnceAnyLinkage ||
+ Linkage == LinkOnceODRLinkage ||
+ Linkage == LinkOnceODRAutoHideLinkage;
+ }
+ static bool isLinkOnceODRAutoHideLinkage(LinkageTypes Linkage) {
+ return Linkage == LinkOnceODRAutoHideLinkage;
}
static bool isWeakLinkage(LinkageTypes Linkage) {
return Linkage == WeakAnyLinkage || Linkage == WeakODRLinkage;
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) || isLinkerPrivateWeakLinkage(Linkage) ||
- isLinkerPrivateWeakDefAutoLinkage(Linkage);
+ isLinkerPrivateLinkage(Linkage) || isLinkerPrivateWeakLinkage(Linkage);
}
static bool isDLLImportLinkage(LinkageTypes Linkage) {
return Linkage == DLLImportLinkage;
return Linkage == CommonLinkage;
}
+ /// isDiscardableIfUnused - Whether the definition of this global may be
+ /// discarded if it is not used in its compilation unit.
+ static bool isDiscardableIfUnused(LinkageTypes Linkage) {
+ return isLinkOnceLinkage(Linkage) || isLocalLinkage(Linkage);
+ }
+
/// mayBeOverridden - Whether the definition of this global may be replaced
/// 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.
Linkage == LinkOnceAnyLinkage ||
Linkage == CommonLinkage ||
Linkage == ExternalWeakLinkage ||
- Linkage == LinkerPrivateWeakLinkage ||
- Linkage == LinkerPrivateWeakDefAutoLinkage;
+ Linkage == LinkerPrivateWeakLinkage;
}
/// isWeakForLinker - Whether the definition of this global may be replaced at
Linkage == WeakODRLinkage ||
Linkage == LinkOnceAnyLinkage ||
Linkage == LinkOnceODRLinkage ||
+ Linkage == LinkOnceODRAutoHideLinkage ||
Linkage == CommonLinkage ||
Linkage == ExternalWeakLinkage ||
- Linkage == LinkerPrivateWeakLinkage ||
- Linkage == LinkerPrivateWeakDefAutoLinkage;
+ Linkage == LinkerPrivateWeakLinkage;
}
bool hasExternalLinkage() const { return isExternalLinkage(Linkage); }
bool hasLinkOnceLinkage() const {
return isLinkOnceLinkage(Linkage);
}
+ bool hasLinkOnceODRAutoHideLinkage() const {
+ return isLinkOnceODRAutoHideLinkage(Linkage);
+ }
bool hasWeakLinkage() const {
return isWeakLinkage(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); }
void setLinkage(LinkageTypes LT) { Linkage = LT; }
LinkageTypes getLinkage() const { return Linkage; }
+ bool isDiscardableIfUnused() const {
+ return isDiscardableIfUnused(Linkage);
+ }
+
bool mayBeOverridden() const { return mayBeOverridden(Linkage); }
bool isWeakForLinker() const { return isWeakForLinker(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 const Module *getParent() const { return Parent; }
// 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) {
return V->getValueID() == Value::FunctionVal ||
V->getValueID() == Value::GlobalVariableVal ||