re PR debug/51262 (ICE: SIGSEGV in primary_template_instantiation_p (pt.c:2874) with -flto -g)

2011-12-12  Richard Guenther  <rguenther@suse.de>

	PR lto/51262
	* tree.c (cp_free_lang_data): No longer clear anonymous names.

	* g++.dg/opt/pr51262.C: New testcase.

From-SVN: r182221

gcc/cp/ChangeLog

+2011-12-12  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/51262
+	* tree.c (cp_free_lang_data): No longer clear anonymous names.
+
 2011-12-09  Jason Merrill  <jason@redhat.com>
 
 	PR c++/51151

gcc/cp/tree.c

@@ -3479,17 +3479,6 @@ cp_free_lang_data (tree t)
       DECL_EXTERNAL (t) = 1;
       TREE_STATIC (t) = 0;
     }
-  if (CP_AGGREGATE_TYPE_P (t)
-      && TYPE_NAME (t))
-    {
-      tree name = TYPE_NAME (t);
-      if (TREE_CODE (name) == TYPE_DECL)
-	name = DECL_NAME (name);
-      /* Drop anonymous names.  */
-      if (name != NULL_TREE
-	  && ANON_AGGRNAME_P (name))
-	TYPE_NAME (t) = NULL_TREE;
-    }
   if (TREE_CODE (t) == NAMESPACE_DECL)
     {
       /* The list of users of a namespace isn't useful for the middle-end

gcc/testsuite/ChangeLog

+2011-12-12  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/51262
+	* g++.dg/opt/pr51262.C: New testcase.
+
 2011-12-12  Revital Eres  <revital.eres@linaro.org>
 
 	PR rtl-optimization/47013

gcc/testsuite/g++.dg/opt/pr51262.C

+// { dg-do compile }
+// { dg-require-effective-target lto }
+// { dg-options "-flto -g" }
+
+template < typename > void *
+bar (int *p)
+{
+  union
+    {
+      int *p;
+    }
+  u;
+  u.p = p;
+  return u.p;
+}
+
+void
+foo (int *p)
+{
+  bar < void >(p);
+}