Valu("ptr", OpConst64, c.config.Types.Int64, 0xABCD, nil),
				Valu("v", OpConst64, c.config.Types.Int64, 12, nil),
				Valu("mem1", OpStore, types.TypeMem, 0, c.config.Types.Int64, "ptr", "v", "mem0"),
				Valu("mem2", OpStore, types.TypeMem, 0, c.config.Types.Int64, "ptr", "v", "mem1"),
				Valu("mem3", OpStore, types.TypeMem, 0, c.config.Types.Int64, "ptr", "sum", "mem2"),

		return
	}
	b.uint64(tag, x)
}

func (b *protobuf) int64(tag int, x int64) {
	u := uint64(x)
	b.uint64(tag, u)
}

func (b *protobuf) int64Opt(tag int, x int64) {
	if x == 0 {
		return
	}
	b.int64(tag, x)
}

func (b *protobuf) int64s(tag int, x []int64) {
	if len(x) > 2 {
		// Use packed encoding
		n1 := len(b.data)
		for _, u := range x {
			b.varint(uint64(u))
		}
		n2 := len(b.data)

	ss_flags int32
	ss_size  uintptr
}

type sigcontext struct {
	psw_mask uint64
	psw_addr uint64
	gregs    [16]uint64
	aregs    [16]uint32
	fpc      uint32
	fpregs   [16]uint64
}

type ucontext struct {
	uc_flags    uint64
	uc_link     *ucontext
	uc_stack    stackt
	uc_mcontext sigcontext
	uc_sigmask  uint64

			Valu("shift", op, typ, 0, nil, "load", "c"),
			Valu("store", OpStore, types.TypeMem, 0, c.config.Types.UInt64, "resptr", "shift", "mem"),
			Exit("store")))
	Compile(fun.f)
	return fun
}

func TestShiftToExtensionAMD64(t *testing.T) {
	c := testConfig(t)
	// Test that eligible pairs of constant shifts are converted to extensions.
	// For example:
	//   (uint64(x) << 32) >> 32 -> uint64(uint32(x))

	r14         uint64
	r15         uint64
	rdi         uint64
	rsi         uint64
	rbp         uint64
	rbx         uint64
	rdx         uint64
	rax         uint64
	rcx         uint64
	rsp         uint64
	rip         uint64
	eflags      uint64
	cs          uint16
	gs          uint16
	fs          uint16
	__pad0      uint16
	err         uint64
	trapno      uint64
	oldmask     uint64

	Metric       uint32
	Rdomain      uint32
	Baudrate     uint64
	Ipackets     uint64
	Ierrors      uint64
	Opackets     uint64
	Oerrors      uint64
	Collisions   uint64
	Ibytes       uint64
	Obytes       uint64
	Imcasts      uint64
	Omcasts      uint64
	Iqdrops      uint64
	Oqdrops      uint64
	Noproto      uint64
	Capabilities uint32
	Lastchange   Timeval
}

	__pthread_attrp *byte
}

type stat struct {
	st_dev     uint64
	st_ino     uint64
	st_mode    uint32
	st_nlink   uint32
	st_uid     uint32
	st_gid     uint32
	st_rdev    uint64
	st_size    int64
	st_atim    timespec
	st_mtim    timespec
	st_ctim    timespec
	st_blksize int32
	pad_cgo_0  [4]byte
	st_blocks  int64
	st_fstype  [16]int8
}

	_O_CLOEXEC  = 0x80000
)

type usigset struct {
	__val [16]uint64
}

type stackt struct {
	ss_sp     *byte
	ss_flags  int32
	pad_cgo_0 [4]byte
	ss_size   uintptr
}

type sigcontext struct {
	fault_address uint64
	/* AArch64 registers */
	regs       [31]uint64
	sp         uint64
	pc         uint64
	pstate     uint64
	_pad       [8]byte // __attribute__((__aligned__(16)))

type Visitor interface {
	String(string)
	Int64(int64)
	Uint64(uint64)
	Float64(float64)
	Bool(bool)
	Duration(time.Duration)
	Any(any)
}

func (a Value) Visit(v Visitor) {
	switch a.Kind() {
	case KindString:
		v.String(a.str())
	case KindInt64:
		v.Int64(int64(a.num))
	case KindUint64:
		v.Uint64(a.num)
	case KindBool:
		v.Bool(a.bool())
	case KindFloat64:

}

type Uint64 uint64

func (x Uint64) m(a, b, c, d, e, f, g, h byte) {
	check("Uint64", int64(x), 0x0102030405060708, a, b, c, d, e, f, g, h)
}

var test = []I{
	Int8(0x01),
	Uint8(0x01),
	Int16(0x0102),
	Uint16(0x0102),
	Int32(0x01020304),
	Uint32(0x01020304),
	Int64(0x0102030405060708),
	Uint64(0x0102030405060708),
}

func main() {