1779 static void getUsefulBits(SDValue Op, APInt &UsefulBits, unsigned Depth = 0);
1781 static void getUsefulBitsFromAndWithImmediate(SDValue Op, APInt &UsefulBits,  in getUsefulBitsFromAndWithImmediate()  argument
1785   Imm = AArch64_AM::decodeLogicalImmediate(Imm, UsefulBits.getBitWidth());  in getUsefulBitsFromAndWithImmediate()
1786   UsefulBits &= APInt(UsefulBits.getBitWidth(), Imm);  in getUsefulBitsFromAndWithImmediate()
1787   getUsefulBits(Op, UsefulBits, Depth + 1);  in getUsefulBitsFromAndWithImmediate()
1790 static void getUsefulBitsFromBitfieldMoveOpd(SDValue Op, APInt &UsefulBits,  in getUsefulBitsFromBitfieldMoveOpd()  argument
1794   APInt OpUsefulBits(UsefulBits);  in getUsefulBitsFromBitfieldMoveOpd()
1814   UsefulBits &= OpUsefulBits;  in getUsefulBitsFromBitfieldMoveOpd()
1817 static void getUsefulBitsFromUBFM(SDValue Op, APInt &UsefulBits,  in getUsefulBitsFromUBFM()  argument
1824   getUsefulBitsFromBitfieldMoveOpd(Op, UsefulBits, Imm, MSB, Depth);  in getUsefulBitsFromUBFM()
1827 static void getUsefulBitsFromOrWithShiftedReg(SDValue Op, APInt &UsefulBits,  in getUsefulBitsFromOrWithShiftedReg()  argument
1831   APInt Mask(UsefulBits);  in getUsefulBitsFromOrWithShiftedReg()
1852   UsefulBits &= Mask;  in getUsefulBitsFromOrWithShiftedReg()
1855 static void getUsefulBitsFromBFM(SDValue Op, SDValue Orig, APInt &UsefulBits,  in getUsefulBitsFromBFM()  argument
1863     return getUsefulBitsFromBitfieldMoveOpd(Op, UsefulBits, Imm, MSB, Depth);  in getUsefulBitsFromBFM()
1865   APInt OpUsefulBits(UsefulBits);  in getUsefulBitsFromBFM()
1871     UsefulBits &= ~OpUsefulBits;  in getUsefulBitsFromBFM()
1872     getUsefulBits(Op, UsefulBits, Depth + 1);  in getUsefulBitsFromBFM()
1876     UsefulBits = ~(OpUsefulBits.shl(OpUsefulBits.getBitWidth() - Imm));  in getUsefulBitsFromBFM()
1877     getUsefulBits(Op, UsefulBits, Depth + 1);  in getUsefulBitsFromBFM()
1881 static void getUsefulBitsForUse(SDNode *UserNode, APInt &UsefulBits,  in getUsefulBitsForUse()  argument
1897     return getUsefulBitsFromAndWithImmediate(SDValue(UserNode, 0), UsefulBits,  in getUsefulBitsForUse()
1901     return getUsefulBitsFromUBFM(SDValue(UserNode, 0), UsefulBits, Depth);  in getUsefulBitsForUse()
1907     return getUsefulBitsFromOrWithShiftedReg(SDValue(UserNode, 0), UsefulBits,  in getUsefulBitsForUse()
1911     return getUsefulBitsFromBFM(SDValue(UserNode, 0), Orig, UsefulBits, Depth);  in getUsefulBitsForUse()
1917     UsefulBits &= APInt(UsefulBits.getBitWidth(), 0xff);  in getUsefulBitsForUse()
1924     UsefulBits &= APInt(UsefulBits.getBitWidth(), 0xffff);  in getUsefulBitsForUse()
1929 static void getUsefulBits(SDValue Op, APInt &UsefulBits, unsigned Depth) {  in getUsefulBits()  argument
1936     UsefulBits = APInt(Bitwidth, 0);  in getUsefulBits()
1937     UsefulBits.flipAllBits();  in getUsefulBits()
1939   APInt UsersUsefulBits(UsefulBits.getBitWidth(), 0);  in getUsefulBits()
1943     APInt UsefulBitsForUse = APInt(UsefulBits);  in getUsefulBits()
1950   UsefulBits &= UsersUsefulBits;  in getUsefulBits()
2136 static bool tryBitfieldInsertOpFromOr(SDNode *N, const APInt &UsefulBits,  in tryBitfieldInsertOpFromOr()  argument
2149   unsigned NumberOfIgnoredLowBits = UsefulBits.countTrailingZeros();  in tryBitfieldInsertOpFromOr()
2150   unsigned NumberOfIgnoredHighBits = UsefulBits.countLeadingZeros();  in tryBitfieldInsertOpFromOr()