diff --git a/ir_check.c b/ir_check.c
index cae3387..095b989 100644
--- a/ir_check.c
+++ b/ir_check.c
@@ -208,8 +208,6 @@ bool ir_check(const ir_ctx *ctx)
 				/* pass (function returns void) */
 			} else if (insn->op == IR_BEGIN && j == 1) {
 				/* pass (start of unreachable basic block) */
-//			} else if (insn->op == IR_LOOP_BEGIN || insn->op == IR_MERGE) {
-//				/* TODO: something wrong ??? */
 			} else if (IR_OPND_KIND(flags, j) != IR_OPND_CONTROL_REF
 					&& (insn->op != IR_SNAPSHOT || j == 1)) {
 				fprintf(stderr, "ir_base[%d].ops[%d] missing reference (%d)\n", i, j, use);