tree.c (fld_type_variant): Also copy alignment; be sure that new variant is equal.

	* tree.c (fld_type_variant): Also copy alignment; be sure that
	new variant is equal.

From-SVN: r265845

gcc/ChangeLog

+2018-11-06  Jan Hubicka  <jh@suse.cz>
+
+	* tree.c (fld_type_variant): Also copy alignment; be sure that
+	new variant is equal.
+
 2018-11-06  Ilya Leoshkevich  <iii@linux.ibm.com>
 
 	PR target/87762

gcc/tree.c

@@ -5119,6 +5119,8 @@ fld_type_variant (tree first, tree t, struct free_lang_data_d *fld)
   TYPE_NAME (v) = TYPE_NAME (t);
   TYPE_ATTRIBUTES (v) = TYPE_ATTRIBUTES (t);
   TYPE_CANONICAL (v) = TYPE_CANONICAL (t);
+  SET_TYPE_ALIGN (v, TYPE_ALIGN (t));
+  gcc_checking_assert (fld_type_variant_equal_p (t,v));
   add_tree_to_fld_list (v, fld);
   return v;
 }