re PR c++/45651 (ICE in import_export_decl, at cp/decl2.c:2344)

	PR c++/45651
	* pt.c (instantiate_decl): Don't clear DECL_INTERFACE_KNOWN on
	!TREE_PUBLIC decls.

From-SVN: r170781

gcc/cp/ChangeLog

+2011-03-08  Jason Merrill  <jason@redhat.com>
+
+	PR c++/45651
+	* pt.c (instantiate_decl): Don't clear DECL_INTERFACE_KNOWN on
+	!TREE_PUBLIC decls.
+
 2011-03-08  Dodji Seketeli  <dodji@redhat.com>
 
 	PR c++/47957

gcc/cp/pt.c

@@ -17224,8 +17224,13 @@ instantiate_decl (tree d, int defer_ok,
   if (!pattern_defined && expl_inst_class_mem_p
       && DECL_EXPLICIT_INSTANTIATION (d))
     {
-      DECL_NOT_REALLY_EXTERN (d) = 0;
-      DECL_INTERFACE_KNOWN (d) = 0;
+      /* Leave linkage flags alone on instantiations with anonymous
+	 visibility.  */
+      if (TREE_PUBLIC (d))
+	{
+	  DECL_NOT_REALLY_EXTERN (d) = 0;
+	  DECL_INTERFACE_KNOWN (d) = 0;
+	}
       SET_DECL_IMPLICIT_INSTANTIATION (d);
     }
 

gcc/testsuite/ChangeLog

+2011-03-08  Jason Merrill  <jason@redhat.com>
+
+	* g++.dg/template/anon5.C: New.
+
 2011-03-08  Jakub Jelinek  <jakub@redhat.com>
 
 	PR debug/47881

gcc/testsuite/g++.dg/template/anon5.C

+// PR c++/45651
+
+namespace { template <int T> struct A {}; }
+template <int T> struct B { void f(A<T>); };
+template struct B<1>;
+template<int T> void B<T>::f(A<T>) {}