DLLImportLinkage, ///< Function to be imported from DLL
DLLExportLinkage, ///< Function to be accessible from DLL.
ExternalWeakLinkage,///< ExternalWeak linkage description.
- GhostLinkage, ///< Stand-in functions for streaming fns from BC files.
CommonLinkage ///< Tentative definitions.
};
protected:
GlobalValue(const Type *ty, ValueTy vty, Use *Ops, unsigned NumOps,
- LinkageTypes linkage, const Twine &Name = "")
+ LinkageTypes linkage, const Twine &Name)
: Constant(ty, vty, Ops, NumOps), Parent(0),
Linkage(linkage), Visibility(DefaultVisibility), Alignment(0) {
setName(Name);
bool hasSection() const { return !Section.empty(); }
const std::string &getSection() const { return Section; }
- void setSection(const StringRef &S) { Section = S; }
+ void setSection(StringRef S) { Section = S; }
/// If the usage is empty (except transitively dead constants), then this
/// global value can can be safely deleted since the destructor will
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 hasCommonLinkage() const { return Linkage == CommonLinkage; }
void setLinkage(LinkageTypes LT) { Linkage = LT; }
/// create a GlobalValue) from the GlobalValue Src to this one.
virtual void copyAttributesFrom(const GlobalValue *Src);
- /// hasNotBeenReadFromBitcode - If a module provider is being used to lazily
- /// stream in functions from disk, this method can be used to check to see if
- /// the function has been read in yet or not. Unless you are working on the
- /// JIT or something else that streams stuff in lazily, you don't need to
- /// worry about this.
- bool hasNotBeenReadFromBitcode() const { return Linkage == GhostLinkage; }
+/// @name Materialization
+/// Materialization is used to construct functions only as they're needed. This
+/// is useful to reduce memory usage in LLVM or parsing work done by the
+/// BitcodeReader to load the Module.
+/// @{
+
+ /// isMaterializable - If this function's Module is being lazily streamed in
+ /// functions from disk or some other source, this method can be used to check
+ /// to see if the function has been read in yet or not.
+ bool isMaterializable() const;
+
+ /// isDematerializable - Returns true if this function was loaded from a
+ /// GVMaterializer that's still attached to its Module and that knows how to
+ /// dematerialize the function.
+ bool isDematerializable() const;
+
+ /// Materialize - make sure this GlobalValue is fully read. If the module is
+ /// corrupt, this returns true and fills in the optional string with
+ /// information about the problem. If successful, this returns false.
+ bool Materialize(std::string *ErrInfo = 0);
+
+ /// Dematerialize - If this GlobalValue is read in, and if the GVMaterializer
+ /// supports it, release the memory for the function, and set it up to be
+ /// materialized lazily. If !isDematerializable(), this method is a noop.
+ void Dematerialize();
+
+/// @}
/// Override from Constant class. No GlobalValue's are null values so this
/// always returns false.