//
// 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.
//
//===----------------------------------------------------------------------===//
//
// This file is a common base class of all globally definable objects. As such,
-// it is subclassed by GlobalVariable and by Function. This is used because you
-// can do certain things with these global objects that you can't do to anything
-// else. For example, use the address of one as a constant.
+// it is subclassed by GlobalVariable, GlobalAlias and by Function. This is
+// used because you can do certain things with these global objects that you
+// can't do to anything else. For example, use the address of one as a
+// constant.
//
//===----------------------------------------------------------------------===//
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
+ GhostLinkage, ///< Stand-in functions for streaming fns from BC files
+ CommonLinkage ///< Tentative definitions
};
/// @brief An enumeration for the kinds of visibility of global values.
enum VisibilityTypes {
DefaultVisibility = 0, ///< The GV is visible
- HiddenVisibility ///< The GV is hidden
+ HiddenVisibility, ///< The GV is hidden
+ ProtectedVisibility ///< The GV is protected
};
protected:
- GlobalValue(const Type *Ty, ValueTy vty, Use *Ops, unsigned NumOps,
+ GlobalValue(const Type *ty, ValueTy vty, Use *Ops, unsigned NumOps,
LinkageTypes linkage, const std::string &name = "")
- : Constant(Ty, vty, Ops, NumOps), Parent(0),
+ : Constant(ty, vty, Ops, NumOps), Parent(0),
Linkage(linkage), Visibility(DefaultVisibility), Alignment(0) {
if (!name.empty()) setName(name);
}
// 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 : 1; // The visibility style of this global
+ unsigned Visibility : 2; // The visibility style of this global
unsigned Alignment : 16; // Alignment of this symbol, must be power of two
std::string Section; // Section to emit this into, empty mean default
public:
Alignment = Align;
}
- VisibilityTypes getVisibility() const { return (VisibilityTypes)Visibility; }
+ VisibilityTypes getVisibility() const { return VisibilityTypes(Visibility); }
bool hasHiddenVisibility() const { return Visibility == HiddenVisibility; }
+ bool hasProtectedVisibility() const {
+ return Visibility == ProtectedVisibility;
+ }
void setVisibility(VisibilityTypes V) { Visibility = V; }
bool hasSection() const { return !Section.empty(); }
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 hasDLLImportLinkage() const { return Linkage == DLLImportLinkage; }
void setLinkage(LinkageTypes LT) { Linkage = LT; }
LinkageTypes getLinkage() const { return Linkage; }
- /// hasNotBeenReadFromBytecode - If a module provider is being used to lazily
+ /// isWeakForLinker - Determines if symbol is weak for linker having weak or
+ /// linkonce or common or extweak LLVM linkage.
+ bool isWeakForLinker() const {
+ return (Linkage == WeakLinkage ||
+ Linkage == LinkOnceLinkage ||
+ Linkage == CommonLinkage ||
+ Linkage == ExternalWeakLinkage);
+ }
+
+ /// copyAttributesFrom - copy all additional attributes (those not needed to
+ /// 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 hasNotBeenReadFromBytecode() const { return Linkage == GhostLinkage; }
+ bool hasNotBeenReadFromBitcode() const { return Linkage == GhostLinkage; }
/// Override from Constant class. No GlobalValue's are null values so this
/// always returns false.
/// value is outside of the current translation unit...
virtual bool isDeclaration() const = 0;
- /// removeFromParent - This method unlinks 'this' from the containing module,
- /// but does not delete it.
- ///
- virtual void removeFromParent() = 0;
-
- /// eraseFromParent - This method unlinks 'this' from the containing module
- /// and deletes it.
- ///
- virtual void eraseFromParent() = 0;
-
/// getParent - Get the module that this global value is contained inside
/// of...
inline Module *getParent() { return Parent; }
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