n = new_rd_Add(a_dbg, irg, a_block, sub, s_right, mode);
} else {
ir_node *sub = new_rd_Sub(s_dbg, irg, s_block, s_right, s_left, s_mode);
n = new_rd_Add(a_dbg, irg, a_block, sub, s_right, mode);
} else {
ir_node *sub = new_rd_Sub(s_dbg, irg, s_block, s_right, s_left, s_mode);