Some name-lookup-related fixes, from Piotr Rak!

- Changes Lookup*Name functions to return NamedDecls, instead of
Decls. Unfortunately my recent statement that it will simplify lot of
code, was not quite right, but it simplifies some...
- Makes MergeLookupResult SmallPtrSet instead of vector, following
Douglas suggestions.
- Adds %qN format for printing qualified names to Diagnostic.
- Avoids searching for using-directives in Scopes, which are not
DeclScope, during unqualified name lookup.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63739 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index 33985ee..231efc7 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -865,8 +865,8 @@
   }
   
   // Look up the function
-  Decl *CleanupDecl = S.LookupName(S.TUScope, Attr.getParameterName(), 
-                                   Sema::LookupOrdinaryName);
+  NamedDecl *CleanupDecl = S.LookupName(S.TUScope, Attr.getParameterName(),
+                                        Sema::LookupOrdinaryName);
   if (!CleanupDecl) {
     S.Diag(Attr.getLoc(), diag::err_attribute_cleanup_arg_not_found) << 
       Attr.getParameterName();