op_tail 460 tools/code_gen.c op *op_head, *op_tail, *cur_func; op_tail 516 tools/code_gen.c if (op_tail) op_tail 518 tools/code_gen.c op_tail->next = p; op_tail 525 tools/code_gen.c op_tail = p; op_tail 1181 tools/code_gen.c op_head = op_tail = 0;