/// @brief An enumeration for the kinds of linkage for global values.
enum LinkageTypes {
ExternalLinkage = 0,///< Externally visible function
- LinkOnceLinkage, ///< Keep one copy of function when linking (inline)
- WeakLinkage, ///< Keep one copy of named function when linking (weak)
+ AvailableExternallyLinkage, ///< Available for inspection, not emission.
+ LinkOnceAnyLinkage, ///< Keep one copy of function when linking (inline)
+ LinkOnceODRLinkage, ///< Same, but only replaced by something equivalent.
+ 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
InternalLinkage, ///< Rename collisions when linking (static functions)
PrivateLinkage, ///< Like Internal, but omit from symbol table
}
VisibilityTypes getVisibility() const { return VisibilityTypes(Visibility); }
+ bool hasDefaultVisibility() const { return Visibility == DefaultVisibility; }
bool hasHiddenVisibility() const { return Visibility == HiddenVisibility; }
bool hasProtectedVisibility() const {
return Visibility == ProtectedVisibility;
return reinterpret_cast<const PointerType*>(User::getType());
}
- bool hasExternalLinkage() const { return Linkage == ExternalLinkage; }
- bool hasLinkOnceLinkage() const { return Linkage == LinkOnceLinkage; }
- bool hasWeakLinkage() const { return Linkage == WeakLinkage; }
- bool hasCommonLinkage() const { return Linkage == CommonLinkage; }
- bool hasAppendingLinkage() const { return Linkage == AppendingLinkage; }
- bool hasInternalLinkage() const { return Linkage == InternalLinkage; }
- bool hasPrivateLinkage() const { return Linkage == PrivateLinkage; }
- bool hasLocalLinkage() const {
+ static LinkageTypes getLinkOnceLinkage(bool ODR) {
+ return ODR ? LinkOnceODRLinkage : LinkOnceAnyLinkage;
+ }
+ static LinkageTypes getWeakLinkage(bool ODR) {
+ return ODR ? WeakODRLinkage : WeakAnyLinkage;
+ }
+
+ bool hasExternalLinkage() const { return Linkage == ExternalLinkage; }
+ bool hasAvailableExternallyLinkage() const {
+ return Linkage == AvailableExternallyLinkage;
+ }
+ bool hasLinkOnceLinkage() const {
+ return Linkage == LinkOnceAnyLinkage || Linkage == LinkOnceODRLinkage;
+ }
+ bool hasWeakLinkage() const {
+ return Linkage == WeakAnyLinkage || Linkage == WeakODRLinkage;
+ }
+ bool hasAppendingLinkage() const { return Linkage == AppendingLinkage; }
+ bool hasInternalLinkage() const { return Linkage == InternalLinkage; }
+ bool hasPrivateLinkage() const { return Linkage == PrivateLinkage; }
+ bool hasLocalLinkage() const {
return Linkage == InternalLinkage || Linkage == PrivateLinkage;
}
- bool hasDLLImportLinkage() const { return Linkage == DLLImportLinkage; }
- bool hasDLLExportLinkage() const { return Linkage == DLLExportLinkage; }
+ bool hasDLLImportLinkage() const { return Linkage == DLLImportLinkage; }
+ bool hasDLLExportLinkage() const { return Linkage == DLLExportLinkage; }
bool hasExternalWeakLinkage() const { return Linkage == ExternalWeakLinkage; }
- bool hasGhostLinkage() const { return Linkage == GhostLinkage; }
+ bool hasGhostLinkage() const { return Linkage == GhostLinkage; }
+ bool hasCommonLinkage() const { return Linkage == CommonLinkage; }
+
void setLinkage(LinkageTypes LT) { Linkage = LT; }
LinkageTypes getLinkage() const { return Linkage; }
/// mayBeOverridden - Whether the definition of this global may be replaced
- /// at link time. For example, if a function has weak linkage then the code
- /// defining it may be replaced by different code.
+ /// 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.
bool mayBeOverridden() const {
- return (Linkage == WeakLinkage ||
- Linkage == LinkOnceLinkage ||
+ return (Linkage == WeakAnyLinkage ||
+ Linkage == LinkOnceAnyLinkage ||
+ Linkage == CommonLinkage ||
+ Linkage == ExternalWeakLinkage);
+ }
+
+ /// isWeakForLinker - Whether the definition of this global may be replaced at
+ /// link time.
+ bool isWeakForLinker() const {
+ return (Linkage == AvailableExternallyLinkage ||
+ Linkage == WeakAnyLinkage ||
+ Linkage == WeakODRLinkage ||
+ Linkage == LinkOnceAnyLinkage ||
+ Linkage == LinkOnceODRLinkage ||
Linkage == CommonLinkage ||
Linkage == ExternalWeakLinkage);
}
/// 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();
+ void removeDeadConstantUsers() const;
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const GlobalValue *) { return true; }