288 		 * combined or shared groups, this metric may not care  in setup_metric_events()
1418  * @combined: Out argument for result.
1421 				   struct expr_parse_ctx **combined)  in build_combined_expr_ctx()  argument
1429 	*combined = expr__ctx_new();  in build_combined_expr_ctx()
1430 	if (!*combined)  in build_combined_expr_ctx()
1441 				ret = expr__add_id(*combined, dup);  in build_combined_expr_ctx()
1449 	expr__ctx_free(*combined);  in build_combined_expr_ctx()
1450 	*combined = NULL;  in build_combined_expr_ctx()
1568 		struct expr_parse_ctx *combined = NULL;  in parse_groups()  local
1572 		ret = build_combined_expr_ctx(&metric_list, &combined);  in parse_groups()
1574 		if (!ret && combined && hashmap__size(combined->ids)) {  in parse_groups()
1575 			ret = parse_ids(metric_no_merge, fake_pmu, combined,  in parse_groups()
1581 		if (combined)  in parse_groups()
1582 			expr__ctx_free(combined);  in parse_groups()