"istio.io/istio/pkg/config/constants"
	"istio.io/istio/pkg/config/host"
	"istio.io/istio/pkg/config/protocol"
	"istio.io/istio/pkg/log"
	"istio.io/istio/pkg/monitoring"
	"istio.io/istio/pkg/proto"
	secconst "istio.io/istio/pkg/security"
	"istio.io/istio/pkg/slices"
	netutil "istio.io/istio/pkg/util/net"
	"istio.io/istio/pkg/util/sets"
	"istio.io/istio/pkg/wellknown"
)

const (
	NoConflict = iota

(ADDconst [c] (SUBconst [d] x)) => (ADDconst [c-d] x)
(ADDconst [c] (RSBconst [d] x)) => (RSBconst [c+d] x)
(ADCconst [c] (ADDconst [d] x) flags) => (ADCconst [c+d] x flags)
(ADCconst [c] (SUBconst [d] x) flags) => (ADCconst [c-d] x flags)
(SUBconst [c] (MOVWconst [d])) => (MOVWconst [d-c])
(SUBconst [c] (SUBconst [d] x)) => (ADDconst [-c-d] x)
(SUBconst [c] (ADDconst [d] x)) => (ADDconst [-c+d] x)

(ADDconst [c] (SUBconst [d] x)) => (ADDconst [c-d] x)
(SUBconst [c] (MOVDconst [d]))  => (MOVDconst [d-c])
(SUBconst [c] (SUBconst [d] x)) => (ADDconst [-c-d] x)
(SUBconst [c] (ADDconst [d] x)) => (ADDconst [-c+d] x)
(SLLconst [c] (MOVDconst [d]))  => (MOVDconst [d<<uint64(c)])
(SRLconst [c] (MOVDconst [d]))  => (MOVDconst [int64(uint64(d)>>uint64(c))])
(SRAconst [c] (MOVDconst [d]))  => (MOVDconst [d>>uint64(c)])

		return true
	}
	// match: (BICconst [c] (MOVWconst [d]))
	// result: (MOVWconst [d&^c])
	for {
		c := auxIntToInt32(v.AuxInt)
		if v_0.Op != OpARMMOVWconst {
			break
		}
		d := auxIntToInt32(v_0.AuxInt)
		v.reset(OpARMMOVWconst)
		v.AuxInt = int32ToAuxInt(d &^ c)
		return true
	}
	// match: (BICconst [c] (BICconst [d] x))
	// result: (BICconst [c|d] x)
	for {

// Match (x >> c) << d to 'rotate then insert selected bits [into zero]'.
(SLDconst (SRDconst x [c]) [d]) => (RISBGZ x {s390x.NewRotateParams(uint8(max8(0, int8(c-d))), 63-d, uint8(int8(d-c)&63))})

// Match (x << c) >> d to 'rotate then insert selected bits [into zero]'.
(SRDconst (SLDconst x [c]) [d]) => (RISBGZ x {s390x.NewRotateParams(d, uint8(min8(63, int8(63-c+d))), uint8(int8(c-d)&63))})

(MOVBZreg (SRDconst [c] x)) && c>=56 => (SRDconst [c] x)
(MOVBreg (SRDconst [c] x)) && c>56 => (SRDconst [c] x)
(MOVBreg (SRDconst [c] x)) && c==56 => (SRADconst [c] x)
(MOVBreg (SRADconst [c] x)) && c>=56 => (SRADconst [c] x)
(MOVBZreg (SRWconst [c] x)) && c>=24 => (SRWconst [c] x)
(MOVBreg (SRWconst [c] x)) && c>24 => (SRWconst [c] x)
(MOVBreg (SRWconst [c] x)) && c==24 => (SRAWconst [c] x)

	g(collect)
	return pats
}

// A generator is a function that calls its argument with the strings that it
// generates.
type generator func(collect func(string))

// genConst generates a single constant string.
func genConst(s string) generator {
	return func(collect func(string)) {
		collect(s)
	}
}

// genChoice generates all the strings in its argument.
func genChoice(choices []string) generator {

(SGTconst [c] (MOVBUreg _)) && 0xff < c => (MOVVconst [1])
(SGTconst [c] (MOVBUreg _)) && c < 0 => (MOVVconst [0])
(SGTUconst [c] (MOVBUreg _)) && 0xff < uint64(c) => (MOVVconst [1])
(SGTconst [c] (MOVHreg _)) && 0x7fff < c => (MOVVconst [1])
(SGTconst [c] (MOVHreg _)) && c <= -0x8000 => (MOVVconst [0])
(SGTconst [c] (MOVHUreg _)) && 0xffff < c => (MOVVconst [1])
(SGTconst [c] (MOVHUreg _)) && c < 0 => (MOVVconst [0])

(SGTconst [c] (MOVBUreg _)) && 0xff < c => (MOVVconst [1])
(SGTconst [c] (MOVBUreg _)) && c < 0 => (MOVVconst [0])
(SGTUconst [c] (MOVBUreg _)) && 0xff < uint64(c) => (MOVVconst [1])
(SGTconst [c] (MOVHreg _)) && 0x7fff < c => (MOVVconst [1])
(SGTconst [c] (MOVHreg _)) && c <= -0x8000 => (MOVVconst [0])
(SGTconst [c] (MOVHUreg _)) && 0xffff < c => (MOVVconst [1])
(SGTconst [c] (MOVHUreg _)) && c < 0 => (MOVVconst [0])

	// )
	if expr != "" {
		buf.WriteByte(')')
	}

	return buf.String()
}

func (x *operand) String() string {
	return operandString(x, nil)
}

// setConst sets x to the untyped constant for literal lit.
func (x *operand) setConst(k token.Token, lit string) {
	var kind BasicKind
	switch k {
	case token.INT:
		kind = UntypedInt
	case token.FLOAT:
		kind = UntypedFloat
	case token.IMAG: