[Bug regression/57551] [4.9 Regression]: g++.dg/ext/visibility/anon6.C scan-assembler 1BIiE1cE

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57551

--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
OK, C++ FE properly brings the decl local as part of constrain_visibility,
however later in pt.c it is made public again in 
mark_decl_instantiated as explicit instantiation.

My wild try is the following:
Index: pt.c
===================================================================
--- pt.c        (revision 199698)
+++ pt.c        (working copy)
@@ -17402,6 +17402,13 @@ mark_decl_instantiated (tree result, int
   if (TREE_ASM_WRITTEN (result))
     return;

+  /* For anonymous namespace we don't need to do anything.  */
+  if (decl_anon_ns_mem_p (result))
+    {
+      gcc_assert (!TREE_PUBLIC (result));
+      return;
+    }
+
   if (TREE_CODE (result) != FUNCTION_DECL)
     /* The TREE_PUBLIC flag for function declarations will have been
        set correctly by tsubst.  */