30 struct FoldableDef {  struct
31   union {
38   const TargetRegisterClass *DefRC = nullptr;
41   const MachineInstr *DefMI = nullptr;
44   unsigned DefSubReg = AMDGPU::NoSubRegister;
47   MachineOperand::MachineOperandType Kind;
50   FoldableDef(MachineOperand &FoldOp, const TargetRegisterClass *DefRC,  in FoldableDef()  function
66   FoldableDef(int64_t FoldImm, const TargetRegisterClass *DefRC,  in FoldableDef()  argument
72   FoldableDef getWithSubReg(const SIRegisterInfo &TRI, unsigned SubReg) const {  in getWithSubReg()
78   bool isReg() const { return Kind == MachineOperand::MO_Register; }  in isReg()
80   Register getReg() const {  in getReg()
85   unsigned getSubReg() const {  in getSubReg()
90   bool isImm() const { return Kind == MachineOperand::MO_Immediate; }  in isImm()
92   bool isFI() const {  in isFI()
96   int getFI() const {  in getFI()
101   bool isGlobal() const { return Kind == MachineOperand::MO_GlobalAddress; }  in isGlobal()
106   std::optional<int64_t> getEffectiveImmVal() const {  in getEffectiveImmVal()
113   bool isOperandLegal(const SIInstrInfo &TII, const MachineInstr &MI,  in isOperandLegal()