78   // Given Xn register, returns n.
79   static unsigned indexOfXReg(Register Xn);
80   // Given n, returns Xn register.
95   bool get(ThunkKind::ThunkKindId Kind, Register Xn, Register Xm) {  in get()  argument
96     reg_bitmask_t XnBit = reg_bitmask_t(1) << indexOfXReg(Xn);  in get()
100   void set(ThunkKind::ThunkKindId Kind, Register Xn, Register Xm) {  in set()  argument
101     reg_bitmask_t XnBit = reg_bitmask_t(1) << indexOfXReg(Xn);  in set()
108                 "Bitmask is not wide enough to hold all Xn registers");
110   // Bitmasks representing operands used, with n-th bit corresponding to Xn
203   // Most Xn registers have consecutive ids, except for FP and XZR.  in indexOfXReg()
279 static SmallString<32> createThunkName(const ThunkKind &Kind, Register Xn,  in createThunkName()  argument
281   unsigned N = ThunksSet::indexOfXReg(Xn);  in createThunkName()
307     assert(Name.starts_with("x") && "xN register name expected");  in parseThunkName()
321   Register Xn = ParseRegName(XnStr);  in parseThunkName()  local
324   return std::make_tuple(std::ref(Kind), Xn, Xm);  in parseThunkName()
330   Register Xn, Xm;  in populateThunk()  local
333   std::tie(std::ignore, Xn, Xm) = KindAndRegs;  in populateThunk()
356   //      MOV x16, xN     ; BR* instructions are not compatible with "BTI c"  in populateThunk()
357   //                      ; branch target unless xN is x16 or x17.  in populateThunk()
362   Entry->addLiveIn(Xn);  in populateThunk()
366       .addReg(Xn)  in populateThunk()
393   //   |  BLR* xN or BLR* xN, xM     |  in convertBLRToBL()
409   //   |  MOV x16, xN                |  in convertBLRToBL()
429   Register Xn = BLR.getOperand(0).getReg();  in convertBLRToBL()  local
439   auto ThunkName = createThunkName(Kind, Xn, Xm);  in convertBLRToBL()
442   if (!Thunks.get(Kind.Id, Xn, Xm)) {  in convertBLRToBL()
444     Thunks.set(Kind.Id, Xn, Xm);  in convertBLRToBL()