re PR c++/80763 (-O3 causes error: inline clone in same comdat group list)

	PR ipa/80763
	* ipa-comdats.c (set_comdat_group): Only set comdat group of real
	symbols; not inline clones.

From-SVN: r256369

gcc/ChangeLog

+2018-01-09  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR ipa/80763
+	* ipa-comdats.c (set_comdat_group): Only set comdat group of real
+	symbols; not inline clones.
+
 2018-01-09  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/83507

gcc/ipa-comdats.c

@@ -211,8 +211,11 @@ set_comdat_group (symtab_node *symbol,
   symtab_node *head = (symtab_node *)head_p;
 
   gcc_assert (!symbol->get_comdat_group ());
-  symbol->set_comdat_group (head->get_comdat_group ());
-  symbol->add_to_same_comdat_group (head);
+  if (symbol->real_symbol_p ())
+    {
+      symbol->set_comdat_group (head->get_comdat_group ());
+      symbol->add_to_same_comdat_group (head);
+    }
   return false;
 }