implement the alias attirbute (in both Sema and Codegen)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@52092 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.h b/lib/CodeGen/CodeGenModule.h
index de2995f..d69b87f 100644
--- a/lib/CodeGen/CodeGenModule.h
+++ b/lib/CodeGen/CodeGenModule.h
@@ -154,6 +154,9 @@
   void SetFunctionAttributes(const FunctionDecl *FD,
                              llvm::Function *F,
                              const llvm::FunctionType *FTy);
+
+  void SetGlobalValueAttributes(const FunctionDecl *FD,
+                                llvm::GlobalValue *GV);
   
 };
 }  // end namespace CodeGen