// Read File Header
	var magic [SAIAMAG]byte
	if _, err := sr.ReadAt(magic[:], 0); err != nil {
		return nil, err
	}

	arch := new(Archive)
	switch string(magic[:]) {
	case AIAMAGBIG:
		arch.magic = string(magic[:])
	case AIAMAG:
		return nil, fmt.Errorf("small AIX archive not supported")
	default:
		return nil, fmt.Errorf("unrecognised archive magic: 0x%x", magic)
	}

	m := M.Uint64()
	return umagicData{s: int64(s), m: m}
}

func umagic8(c int8) umagicData   { return umagic(8, int64(c)) }
func umagic16(c int16) umagicData { return umagic(16, int64(c)) }
func umagic32(c int32) umagicData { return umagic(32, int64(c)) }
func umagic64(c int64) umagicData { return umagic(64, c) }

// For signed division, we use a similar strategy.
// First, we enforce a positive c.

		t.Skip("slow test; skipping")
	}
	testMagicExhaustiveU(t, 16)
}

// exhaustive test of magic for n bits
func testMagicExhaustive(t *testing.T, n uint) {
	min := -int64(1) << (n - 1)
	max := int64(1) << (n - 1)
	for c := int64(1); c < max; c++ {
		if !smagicOK(n, int64(c)) {
			continue
		}
		m := int64(smagic(n, c).m)
		s := smagic(n, c).s
		for i := min; i < max; i++ {
			want := i / c
			got := (i * m) >> (n + uint(s))

	// Start with the magic number.
	err := binary.Read(sr, binary.BigEndian, &ff.Magic)
	if err != nil {
		return nil, &FormatError{0, "error reading magic number", nil}
	} else if ff.Magic != MagicFat {
		// See if this is a Mach-O file via its magic number. The magic
		// must be converted to little endian first though.
		var buf [4]byte
		binary.BigEndian.PutUint32(buf[:], ff.Magic)

// CHECK-NEXT:    %[[ADD:.*]] = "tf.Add"(%[[ARG0]], %[[ARG1]]) : (tensor<10xf32>, tensor<10xf32>) -> tensor<10xf32>
// CHECK-NEXT:    %[[MAGIC:.*]] = "magic.op"(%[[ADD]], %[[ADD]]) : (tensor<10xf32>, tensor<10xf32>) -> tensor<10x10xf32>
// CHECK-NEXT:    return %[[MAGIC]]

	case beMagic == go12magic:
		t.binary, possibleVersion = binary.BigEndian, ver12
	case leMagic == go116magic:
		t.binary, possibleVersion = binary.LittleEndian, ver116
	case beMagic == go116magic:
		t.binary, possibleVersion = binary.BigEndian, ver116
	case leMagic == go118magic:
		t.binary, possibleVersion = binary.LittleEndian, ver118
	case beMagic == go118magic:

		// We need to read them first to determine the type and
		// validity of optional header.
		ohMagic   uint16
		ohMagicSz = binary.Size(ohMagic)
	)

	// If optional header size is greater than 0 but less than its magic size, return error.
	if sz < uint16(ohMagicSz) {
		return nil, fmt.Errorf("optional header size is less than optional header magic size")
	}

	// read reads from io.ReadSeeke, r, into data.
	var err error

# CHECK:"tf.MlirPassthroughOp"
# CHECK: mlir_module = "\0Afunc @main(%arg0 : tensor<10xf32>, %arg1 : tensor<10xf32>) -> tensor<10x10xf32> {\0A %add = \22tf.Add\22(%arg0, %arg1) : (tensor<10xf32>, tensor<10xf32>) -> tensor<10xf32>\0A %ret = \22magic.op\22(%add, %add) : (tensor<10xf32>, tensor<10xf32>) -> tensor<10x10xf32>\0A return %ret : tensor<10x10xf32>\0A}\0A"}> {device = ""} : (tensor<10xf32>, tensor<10xf32>) -> tensor<*xf32>

node {
  name: "x"
  op: "Placeholder"

	}
	defer f.Close()

	var header [4]byte
	if _, err = io.ReadFull(f, header[:]); err != nil {
		return nil, fmt.Errorf("error reading magic number from %s: %v", name, err)
	}

	elfMagic := string(header[:])

	// Match against supported file types.
	if elfMagic == elf.ELFMAG {
		f, err := b.openELF(name, start, limit, offset, relocationSymbol)
		if err != nil {

		}

		if x.i != x.n {
			t.Fatalf("wrong x.i after swap: x.i=%#x x.n=%#x", x.i, x.n)
		}

		if x.before != _magic || x.after != _magic {
			t.Fatalf("wrong magic: %#x _ %#x != %#x _ %#x", x.before, x.after, _magic, _magic)
		}
	}
}

func TestStorepNoWB(t *testing.T) {
	var p [2]*int
	for i := range p {