X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FGlobalAlias.h;h=7c147eb62a39f0aa90d5b96cb60985286154e9e9;hb=0011dc4738fbe624d44197ef9496517fd093eaa4;hp=bbd19ba8816d802e8b382bdf462b93b949b31ec2;hpb=c6c98af9e5814e8066c82f20ca11cf646a5fc289;p=oota-llvm.git

diff --git a/include/llvm/GlobalAlias.h b/include/llvm/GlobalAlias.h
index bbd19ba8816..7c147eb62a3 100644
--- a/include/llvm/GlobalAlias.h
+++ b/include/llvm/GlobalAlias.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Anton Korobeynikov 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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -16,6 +16,7 @@
 #define LLVM_GLOBAL_ALIAS_H
 
 #include "llvm/GlobalValue.h"
+#include "llvm/OperandTraits.h"
 
 namespace llvm {
 
@@ -42,13 +43,19 @@ class GlobalAlias : public GlobalValue {
         GlobalAlias *getPrev()       { return Prev; }
   const GlobalAlias *getPrev() const { return Prev; }
 
-  Use Aliasee;
 public:
+  // allocate space for exactly one operand
+  void *operator new(size_t s) {
+    return User::operator new(s, 1);
+  }
   /// GlobalAlias ctor - If a parent module is specified, the alias is
   /// automatically inserted into the end of the specified module's alias list.
   GlobalAlias(const Type *Ty, LinkageTypes Linkage, const std::string &Name = "",
               Constant* Aliasee = 0, Module *Parent = 0);
 
+  /// Provide fast operand accessors
+  DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
+
   /// isDeclaration - Is this global variable lacking an initializer?  If so, 
   /// the global variable is defined in some other translation unit, and is thus
   /// only a declaration here.
@@ -78,7 +85,12 @@ public:
   /// getAliasedGlobal() - Aliasee can be either global or bitcast of
   /// global. This method retrives the global for both aliasee flavours.
   const GlobalValue* getAliasedGlobal() const;
-    
+
+  /// resolveAliasedGlobal() - This method tries to ultimately resolve the alias
+  /// by going through the aliasing chain and trying to find the very last
+  /// global. Returns NULL if a cycle was found.
+  const GlobalValue* resolveAliasedGlobal() const;
+
   // Methods for support type inquiry through isa, cast, and dyn_cast:
   static inline bool classof(const GlobalAlias *) { return true; }
   static inline bool classof(const Value *V) {
@@ -86,6 +98,12 @@ public:
   }
 };
 
+template <>
+struct OperandTraits<GlobalAlias> : FixedNumOperandTraits<1> {
+};
+
+DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalAlias, Value)
+
 } // End llvm namespace
 
 #endif