92   struct RegisterSet : private BitVector {  struct
94     explicit RegisterSet(unsigned s, bool t = false) : BitVector(s, t) {}  in RegisterSet()  function
95     RegisterSet(const RegisterSet &RS) : BitVector(RS) {}  in RegisterSet()  argument
99     unsigned find_first() const {  in find_first()
106     unsigned find_next(unsigned Prev) const {  in find_next()
113     RegisterSet &insert(unsigned R) {  in insert()
118     RegisterSet &remove(unsigned R) {  in remove()
125     RegisterSet &insert(const RegisterSet &Rs) {  in insert()
128     RegisterSet &remove(const RegisterSet &Rs) {  in remove()
132     reference operator[](unsigned R) {  in operator []()
137     bool operator[](unsigned R) const {  in operator []()
142     bool has(unsigned R) const {  in has()
149     bool empty() const {  in empty()
152     bool includes(const RegisterSet &Rs) const {  in includes()
156     bool intersects(const RegisterSet &Rs) const {  in intersects()
161     void ensure(unsigned Idx) {  in ensure()
166     static inline unsigned v2x(unsigned v) {  in v2x()
170     static inline unsigned x2v(unsigned x) {  in x2v()