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;