There is no reason for the PATypeHolder class to derive from the

[oota-llvm.git] / include / llvm / GlobalValue.h

diff --git a/include/llvm/GlobalValue.h b/include/llvm/GlobalValue.h
index d6a977bd372aec5594eb4a2cbe8c29fcfb9e57bd..a80e1fe095a3ad9bd8a25a64faa01e9cd69f8d94 100644 (file)
--- a/include/llvm/GlobalValue.h
+++ b/include/llvm/GlobalValue.h
@@ -1,7 +1,7 @@
-//===-- llvm/GlobalValue.h - Class to represent a global value ---*- C++ -*--=//
+//===-- llvm/GlobalValue.h - Class to represent a global value --*- C++ -*-===//
 //
 // This file is a common base class of all globally definable objects.  As such,
-// it is subclassed by GlobalVariable and by Method.  This is used because you
+// 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.
 //
@@ -12,37 +12,52 @@
 
 #include "llvm/User.h"
 class PointerType;
+class Module;
 
 class GlobalValue : public User {
   GlobalValue(const GlobalValue &);             // do not implement
+public:
+  enum LinkageTypes {
+    ExternalLinkage,   // Externally visible function
+    LinkOnceLinkage,   // Keep one copy of named function when linking (inline)
+    AppendingLinkage,  // Special purpose, only applies to global arrays
+    InternalLinkage    // Rename collisions when linking (static functions)
+  };
 protected:
-  GlobalValue(const Type *Ty, ValueTy vty, bool hasInternalLinkage,
-             const string &name = "")
-    : User(Ty, vty, name), HasInternalLinkage(hasInternalLinkage), Parent(0) {}
+  GlobalValue(const Type *Ty, ValueTy vty, LinkageTypes linkage,
+             const std::string &name = "")
+    : User(Ty, vty, name), Linkage(linkage), Parent(0) {}
 
-  bool HasInternalLinkage;    // Is this value accessable externally?
+  LinkageTypes Linkage;   // The linkage of this global
   Module *Parent;
 public:
   ~GlobalValue() {}
 
-  // getType - Global values are always pointers.
+  /// getType - Global values are always pointers.
   inline const PointerType *getType() const {
     return (const PointerType*)User::getType();
   }
 
-  // Internal Linkage - True if the global value is inaccessible to 
-  bool hasInternalLinkage() const { return HasInternalLinkage; }
-  bool hasExternalLinkage() const { return !HasInternalLinkage; }
-  void setInternalLinkage(bool HIL) { HasInternalLinkage = HIL; }
+  bool hasExternalLinkage()  const { return Linkage == ExternalLinkage; }
+  bool hasLinkOnceLinkage()  const { return Linkage == LinkOnceLinkage; }
+  bool hasAppendingLinkage() const { return Linkage == AppendingLinkage; }
+  bool hasInternalLinkage()  const { return Linkage == InternalLinkage; }
+  void setLinkage(LinkageTypes LT) { Linkage = LT; }
+  LinkageTypes getLinkage() const { return Linkage; }
+
+  /// isExternal - Return true if the primary definition of this global value is
+  /// outside of the current translation unit...
+  virtual bool isExternal() const = 0;
 
-  // Get the module that this global value is contained inside of...
+  /// getParent - Get the module that this global value is contained inside
+  /// of...
   inline Module *getParent() { return Parent; }
   inline const Module *getParent() const { return Parent; }
 
   // Methods for support type inquiry through isa, cast, and dyn_cast:
   static inline bool classof(const GlobalValue *T) { return true; }
   static inline bool classof(const Value *V) {
-    return V->getValueType() == Value::MethodVal || 
+    return V->getValueType() == Value::FunctionVal || 
            V->getValueType() == Value::GlobalVariableVal;
   }
 };