214 	int code;  member
539 	register int c = s->code;  in atomuse()
588 	if (s->code == NOP)  in atomdef()
591 	switch (BPF_CLASS(s->code)) {  in atomdef()
605 		return BPF_MISCOP(s->code) == BPF_TAX ? X_ATOM : A_ATOM;  in atomdef()
629 		if (s->s.code == NOP)  in compute_local_ud()
653 	if (BPF_CLASS(b->s.code) == BPF_JMP) {  in compute_local_ud()
725 F(opt_state_t *opt_state, int code, bpf_u_int32 v0, bpf_u_int32 v1)  in F()  argument
731 	hash = (u_int)code ^ (v0 << 4) ^ (v1 << 8);  in F()
735 		if (p->code == code && p->v0 == v0 && p->v1 == v1)  in F()
750 	if (BPF_MODE(code) == BPF_IMM &&  in F()
751 	    (BPF_CLASS(code) == BPF_LD || BPF_CLASS(code) == BPF_LDX)) {  in F()
757 	p->code = code;  in F()
770 		s->code = NOP;  in vstore()
787 	switch (BPF_OP(s->code)) {  in fold_op()
864 	s->code = BPF_LD|BPF_IMM;  in fold_op()
875 	while (s != 0 && s->s.code == NOP)  in this_op()
922 		if (s->s.code == BPF_ST &&  in opt_peep()
923 		    next->s.code == (BPF_LDX|BPF_MEM) &&  in opt_peep()
930 			next->s.code = BPF_MISC|BPF_TAX;  in opt_peep()
936 		if (s->s.code == (BPF_LD|BPF_IMM) &&  in opt_peep()
937 		    next->s.code == (BPF_MISC|BPF_TAX)) {  in opt_peep()
938 			s->s.code = BPF_LDX|BPF_IMM;  in opt_peep()
939 			next->s.code = BPF_MISC|BPF_TXA;  in opt_peep()
950 		if (s->s.code == (BPF_LD|BPF_IMM)) {  in opt_peep()
968 			if (next->s.code != (BPF_LDX|BPF_MSH|BPF_B))  in opt_peep()
972 			if (add == 0 || add->s.code != (BPF_ALU|BPF_ADD|BPF_X))  in opt_peep()
980 			if (tax == 0 || tax->s.code != (BPF_MISC|BPF_TAX))  in opt_peep()
988 			if (ild == 0 || BPF_CLASS(ild->s.code) != BPF_LD ||  in opt_peep()
989 			    BPF_MODE(ild->s.code) != BPF_IND)  in opt_peep()
1020 			s->s.code = NOP;  in opt_peep()
1021 			add->s.code = NOP;  in opt_peep()
1022 			tax->s.code = NOP;  in opt_peep()
1037 	if (b->s.code == (BPF_JMP|BPF_JEQ|BPF_K) &&  in opt_peep()
1043 		if (last->s.code == (BPF_ALU|BPF_SUB|BPF_X)) {  in opt_peep()
1056 				last->s.code = NOP;  in opt_peep()
1072 				last->s.code = NOP;  in opt_peep()
1073 				b->s.code = BPF_JMP|BPF_JEQ|BPF_X;  in opt_peep()
1087 		else if (last->s.code == (BPF_ALU|BPF_SUB|BPF_K)) {  in opt_peep()
1088 			last->s.code = NOP;  in opt_peep()
1103 		else if (last->s.code == (BPF_ALU|BPF_AND|BPF_K) &&  in opt_peep()
1106 			b->s.code = BPF_JMP|BPF_K|BPF_JSET;  in opt_peep()
1107 			last->s.code = NOP;  in opt_peep()
1120 	if (b->s.code == (BPF_JMP|BPF_K|BPF_JSET)) {  in opt_peep()
1132 	if (opt_state->vmap[val].is_const && BPF_SRC(b->s.code) == BPF_X) {  in opt_peep()
1134 		b->s.code &= ~BPF_X;  in opt_peep()
1142 	if (opt_state->vmap[val].is_const && BPF_SRC(b->s.code) == BPF_K) {  in opt_peep()
1144 		switch (BPF_OP(b->s.code)) {  in opt_peep()
1191 	switch (s->code) {  in opt_stmt()
1196 		v = F(opt_state, s->code, s->k, 0L);  in opt_stmt()
1205 			s->code = BPF_LD|BPF_ABS|BPF_SIZE(s->code);  in opt_stmt()
1207 			v = F(opt_state, s->code, s->k, 0L);  in opt_stmt()
1215 			v = F(opt_state, s->code, s->k, v);  in opt_stmt()
1220 		v = F(opt_state, s->code, 0L, 0L);  in opt_stmt()
1235 		v = F(opt_state, s->code, s->k, 0L);  in opt_stmt()
1241 			s->code = BPF_LD|BPF_IMM;  in opt_stmt()
1262 			val[A_ATOM] = F(opt_state, s->code, val[A_ATOM], 0L);  in opt_stmt()
1275 		op = BPF_OP(s->code);  in opt_stmt()
1292 					s->code = NOP;  in opt_stmt()
1296 					s->code = BPF_LD|BPF_IMM;  in opt_stmt()
1313 		val[A_ATOM] = F(opt_state, s->code, val[A_ATOM], K(s->k));  in opt_stmt()
1326 		op = BPF_OP(s->code);  in opt_stmt()
1333 				s->code = BPF_ALU|BPF_K|op;  in opt_stmt()
1345 					F(opt_state, s->code, val[A_ATOM], K(s->k));  in opt_stmt()
1359 				s->code = BPF_MISC|BPF_TXA;  in opt_stmt()
1365 				s->code = BPF_LD|BPF_IMM;  in opt_stmt()
1371 				s->code = NOP;  in opt_stmt()
1375 		val[A_ATOM] = F(opt_state, s->code, val[A_ATOM], val[X_ATOM]);  in opt_stmt()
1385 			s->code = BPF_LD|BPF_IMM;  in opt_stmt()
1403 			s->code = BPF_LDX|BPF_IMM;  in opt_stmt()
1446 			last[atom]->code = NOP;  in deadstmt()
1467 			last[atom]->code = NOP;  in opt_deadstores()
1492 		if (BPF_CLASS(s->s.code) == BPF_JMP) {  in opt_blk()
1565 	     BPF_CLASS(b->s.code) == BPF_RET)) {  in opt_blk()
1581 	if (BPF_SRC(b->s.code) == BPF_K)  in opt_blk()
1585 	b->et.code = b->s.code;  in opt_blk()
1586 	b->ef.code = -b->s.code;  in opt_blk()
1622 	int code = ep->code;  in fold_edge()  local
1624 	if (code < 0) {  in fold_edge()
1628 		code = -code;  in fold_edge()
1645 	if (child->s.code != code)  in fold_edge()
1672 	if (sense && code == (BPF_JMP|BPF_JEQ|BPF_K))  in fold_edge()
2177 	while (BPF_CLASS((*b)->s.code) == BPF_JMP && JT(*b) == JF(*b))  in opt_root()
2190 	if (BPF_CLASS((*b)->s.code) == BPF_RET)  in opt_root()
2316 		if (BPF_CLASS(p->s.code) != BPF_RET) {  in make_marks()
2342 		while (x && x->s.code == NOP)  in eq_slist()
2344 		while (y && y->s.code == NOP)  in eq_slist()
2350 		if (x->s.code != y->s.code || x->s.k != y->s.k)  in eq_slist()
2360 	if (b0->s.code == b1->s.code &&  in eq_blk()
2453 		if (s->s.code != NOP)  in slength()
2745 		if (src->s.code == NOP)  in convert_code_r()
2747 		dst->code = (u_short)src->s.code;  in convert_code_r()
2751 		if (BPF_CLASS(src->s.code) != BPF_JMP || src->s.code == (BPF_JMP|BPF_JA)) {  in convert_code_r()
2770 		printf("code=%x off=%d %x %x\n", src->s.code,  in convert_code_r()
2829 	dst->code = (u_short)p->s.code;  in convert_code_r()
2844 		    dst[extrajmps].code = BPF_JMP|BPF_JA;  in convert_code_r()
2861 		    dst[extrajmps].code = BPF_JMP|BPF_JA;  in convert_code_r()