1516     MachineInstr &CmpInstr, Register SrcReg, Register SrcReg2, int64_t CmpMask,  in optimizeCompareInstr()  argument
1518   assert(CmpInstr.getParent());  in optimizeCompareInstr()
1522   int DeadNZCVIdx = CmpInstr.findRegisterDefOperandIdx(AArch64::NZCV, true);  in optimizeCompareInstr()
1524     if (CmpInstr.definesRegister(AArch64::WZR) ||  in optimizeCompareInstr()
1525         CmpInstr.definesRegister(AArch64::XZR)) {  in optimizeCompareInstr()
1526       CmpInstr.eraseFromParent();  in optimizeCompareInstr()
1529     unsigned Opc = CmpInstr.getOpcode();  in optimizeCompareInstr()
1530     unsigned NewOpc = convertToNonFlagSettingOpc(CmpInstr);  in optimizeCompareInstr()
1534     CmpInstr.setDesc(MCID);  in optimizeCompareInstr()
1535     CmpInstr.removeOperand(DeadNZCVIdx);  in optimizeCompareInstr()
1536     bool succeeded = UpdateOperandRegClass(CmpInstr);  in optimizeCompareInstr()
1542   if (CmpInstr.getOpcode() == AArch64::PTEST_PP ||  in optimizeCompareInstr()
1543       CmpInstr.getOpcode() == AArch64::PTEST_PP_ANY)  in optimizeCompareInstr()
1544     return optimizePTestInstr(&CmpInstr, SrcReg, SrcReg2, MRI);  in optimizeCompareInstr()
1550   if (!MRI->use_nodbg_empty(CmpInstr.getOperand(0).getReg()))  in optimizeCompareInstr()
1553   if (CmpValue == 0 && substituteCmpToZero(CmpInstr, SrcReg, *MRI))  in optimizeCompareInstr()
1556          removeCmpToZeroOrOne(CmpInstr, SrcReg, CmpValue, *MRI);  in optimizeCompareInstr()
1708 llvm::examineCFlagsUse(MachineInstr &MI, MachineInstr &CmpInstr,  in examineCFlagsUse()  argument
1711   MachineBasicBlock *CmpParent = CmpInstr.getParent();  in examineCFlagsUse()
1720            std::next(CmpInstr.getIterator()), CmpParent->instr_end())) {  in examineCFlagsUse()
1756 static bool canInstrSubstituteCmpInstr(MachineInstr &MI, MachineInstr &CmpInstr,  in canInstrSubstituteCmpInstr()  argument
1762   const unsigned CmpOpcode = CmpInstr.getOpcode();  in canInstrSubstituteCmpInstr()
1766   assert((CmpInstr.getOperand(2).isImm() &&  in canInstrSubstituteCmpInstr()
1767           CmpInstr.getOperand(2).getImm() == 0) &&  in canInstrSubstituteCmpInstr()
1770   std::optional<UsedNZCV> NZVCUsed = examineCFlagsUse(MI, CmpInstr, TRI);  in canInstrSubstituteCmpInstr()
1786   return !areCFlagsAccessedBetweenInstrs(&MI, &CmpInstr, &TRI, AccessToCheck);  in canInstrSubstituteCmpInstr()
1794     MachineInstr &CmpInstr, unsigned SrcReg,  in substituteCmpToZero()  argument
1807   if (!canInstrSubstituteCmpInstr(*MI, CmpInstr, TRI))  in substituteCmpToZero()
1812   CmpInstr.eraseFromParent();  in substituteCmpToZero()
1824 static bool canCmpInstrBeRemoved(MachineInstr &MI, MachineInstr &CmpInstr,  in canCmpInstrBeRemoved()  argument
1853   const unsigned CmpOpcode = CmpInstr.getOpcode();  in canCmpInstrBeRemoved()
1866       examineCFlagsUse(MI, CmpInstr, TRI, &CCUseInstrs);  in canCmpInstrBeRemoved()
1880   if (areCFlagsAccessedBetweenInstrs(&MI, &CmpInstr, &TRI, AK_Write))  in canCmpInstrBeRemoved()
1919     MachineInstr &CmpInstr, unsigned SrcReg, int CmpValue,  in removeCmpToZeroOrOne()  argument
1927   if (!canCmpInstrBeRemoved(*MI, CmpInstr, CmpValue, TRI, CCUseInstrs,  in removeCmpToZeroOrOne()
1931   CmpInstr.eraseFromParent();  in removeCmpToZeroOrOne()