[PATCH] Fix PR52349

[Richard Guenther]

Approved in the PR, tested by Jakub, applied.

Richard.

2012-02-23  Richard Guenther  <rguent...@suse.de>

        go/
        * go-gcc.cc (Gcc_backend::placeholder_pointer_type): Use
        build_distinct_type_copy.

Index: go-gcc.cc
===================================================================
--- go-gcc.cc   (revision 184506)
+++ go-gcc.cc   (working copy)
@@ -602,7 +602,7 @@ Btype*
 Gcc_backend::placeholder_pointer_type(const std::string& name,
                                      Location location, bool)
 {
-  tree ret = build_variant_type_copy(ptr_type_node);
+  tree ret = build_distinct_type_copy(ptr_type_node);
   if (!name.empty())
     {
       tree decl = build_decl(location.gcc_location(), TYPE_DECL,