Substantially revise how clang computes the visibility of a declaration to
more closely parallel the computation of linkage.  This gets us to a state
much closer to what gcc emits, modulo bugs, which will undoubtedly arise in
abundance.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@117147 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGCXX.cpp b/lib/CodeGen/CGCXX.cpp
index 961233a..02cd8f8 100644
--- a/lib/CodeGen/CGCXX.cpp
+++ b/lib/CodeGen/CGCXX.cpp
@@ -180,7 +180,7 @@
   }
 
   // Finally, set up the alias with its proper name and attributes.
-  SetCommonAttributes(AliasDecl.getDecl(), Alias);
+  SetCommonAttributes(cast<NamedDecl>(AliasDecl.getDecl()), Alias);
 
   return false;
 }