// optimize ADCSflags, SBCSflags and friends
(ADCSflags x y (Select1 <types.TypeFlags> (ADDSconstflags [-1] (ADCzerocarry <typ.UInt64> c)))) => (ADCSflags x y c)
(ADCSflags x y (Select1 <types.TypeFlags> (ADDSconstflags [-1] (MOVDconst [0])))) => (ADDSflags x y)
(SBCSflags x y (Select1 <types.TypeFlags> (NEGSflags (NEG <typ.UInt64> (NGCzerocarry <typ.UInt64> bo))))) => (SBCSflags x y bo)

		{name: "SUBconst", argLength: 1, reg: gp11, asm: "SUB", aux: "Int64"},                                         // arg0 - auxInt
		{name: "SBCSflags", argLength: 3, reg: gp2flags1flags, typ: "(UInt64,Flags)", asm: "SBCS"},                    // arg0-(arg1+borrowing), set flags.

	v_2 := v.Args[2]
	v_1 := v.Args[1]
	v_0 := v.Args[0]
	b := v.Block
	typ := &b.Func.Config.Types
	// match: (SBCSflags x y (Select1 <types.TypeFlags> (NEGSflags (NEG <typ.UInt64> (NGCzerocarry <typ.UInt64> bo)))))
	// result: (SBCSflags x y bo)
	for {
		x := v_0
		y := v_1
		if v_2.Op != OpSelect1 || v_2.Type != types.TypeFlags {
			break
		}
		v_2_0 := v_2.Args[0]

			},
			outputs: []outputInfo{
				{0, 670826495}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R19 R20 R21 R22 R23 R24 R25 R26 R30
			},
		},
	},
	{
		name:   "SBCSflags",
		argLen: 3,
		asm:    arm64.ASBCS,
		reg: regInfo{
			inputs: []inputInfo{
				{0, 670826495}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R19 R20 R21 R22 R23 R24 R25 R26 R30