re PR c++/67581 (ICE on transparent union with -g enabled on x86_64-linux-gnu (verify_type failed))

	PR c/67581
	* g++.dg/torture/pr67581.C: New testcase.
	* c-family/c-common.c (handle_transparent_union_attribute): Update
	also type variants.

From-SVN: r231048

gcc/c-family/ChangeLog

+2015-11-29  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR c/67581
+	* c-common.c (handle_transparent_union_attribute): Update
+	also type variants.
+
 2015-11-27  Martin Liska  <mliska@suse.cz>
 
 	PR c++/68312

gcc/c-family/c-common.c

@@ -7787,7 +7787,8 @@ handle_transparent_union_attribute (tree *node, tree name,
 	  *node = type = build_duplicate_type (type);
 	}
 
-      TYPE_TRANSPARENT_AGGR (type) = 1;
+      for (tree t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
+        TYPE_TRANSPARENT_AGGR (t) = 1;
       return NULL_TREE;
     }
 

gcc/testsuite/ChangeLog

+2015-11-29  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR c/67581
+	* g++.dg/torture/pr67581.C: New testcase.
+
 2015-11-27  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/68559

gcc/testsuite/g++.dg/torture/pr67581.C

+/* { dg-do compile } */
+union U 
+{
+  int x; 
+  float y;
+} __attribute__ ((__transparent_union__));