for j := range a {
			a[j] += 3
		}
	}
}

func BenchmarkBitSet(b *testing.B) {
	const N = 64 * 8
	a := make([]uint64, N/64)
	for i := 0; i < b.N; i++ {
		for j := uint64(0); j < N; j++ {
			a[j/64] |= 1 << (j % 64)
		}
	}
}

func BenchmarkBitClear(b *testing.B) {
	const N = 64 * 8
	a := make([]uint64, N/64)
	for i := 0; i < b.N; i++ {
		for j := uint64(0); j < N; j++ {

			panic("bad panic: " + s)
		}
	}()
	return uint64(x[0]) | uint64(x[1])<<8 | uint64(x[2])<<16 | uint64(x[3])<<24 |
		uint64(x[4])<<32 | uint64(x[5])<<40 | uint64(x[6])<<48 | uint64(x[7])<<56
}

func test64i(x []byte, i int) uint64 {
	defer func() {
		r := recover()
		if r == nil {
			panic("no fault or bounds check failure happened")
		}
		s := fmt.Sprintf("%s", r)

	return 1 / c
}
func f64() uint64 {
	s := "\x00\x00\x00\x00\x00\x00\x00\x00"
	c := uint64(s[0]) | uint64(s[1])<<8 | uint64(s[2])<<16 | uint64(s[3])<<24 | uint64(s[4])<<32 | uint64(s[5])<<40 | uint64(s[6])<<48 | uint64(s[7])<<56
	return 1 / c

	// GIF images are restricted to a 256-color palette and the conversion
	// to GIF loses significant image quality.
	{"testdata/video-001.png", "testdata/video-001.gif", 64 << 8},
	{"testdata/video-001.png", "testdata/video-001.interlaced.gif", 64 << 8},
	{"testdata/video-001.png", "testdata/video-001.5bpp.gif", 128 << 8},
	// JPEG is a lossy format and hence needs a non-zero tolerance.

	}
}

func read64(p *[8]byte) uint64 {
	// all supported darwin platforms are little endian
	return uint64(p[0]) | uint64(p[1])<<8 | uint64(p[2])<<16 | uint64(p[3])<<24 | uint64(p[4])<<32 | uint64(p[5])<<40 | uint64(p[6])<<48 | uint64(p[7])<<56
}

func regionFilename(address uint64) string {
	buf := make([]byte, _MAXPATHLEN)
	r := proc_regionfilename(
		os.Getpid(),
		address,
		unsafe.SliceData(buf),
		int64(cap(buf)))

	_ = b[7] // bounds check hint to compiler; see golang.org/issue/14808
	return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
		uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
}

func (bigEndian) Uint32(b []byte) uint32 {
	_ = b[3] // bounds check hint to compiler; see golang.org/issue/14808
	return uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24
}

	xArgM32and32:   (32 + 32) / 8,
	xArgM32fp:      32 / 8,
	xArgM32int:     32 / 8,
	xArgM64:        64 / 8,
	xArgM64fp:      64 / 8,
	xArgM64int:     64 / 8,
	xArgMm2M64:     64 / 8,
	xArgMmM32:      32 / 8,
	xArgMmM64:      64 / 8,
	xArgMoffs16:    16 / 8,
	xArgMoffs32:    32 / 8,
	xArgMoffs64:    64 / 8,
	xArgMoffs8:     8 / 8,
	xArgR32M16:     16 / 8,
	xArgR32M8:      8 / 8,

	case 8:
		_ = b[7] // bounds check hint to compiler; see golang.org/issue/14808
		return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
			uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
	default:
		panic("syscall: readInt with unsupported size")
	}
}

// ParseDirent parses up to max directory entries in buf,
// appending the names to names. It returns the number of

	_ = b[7] // bounds check hint to compiler; see golang.org/issue/14808
	return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
		uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
}

type binaryBigEndian struct{}

func (binaryBigEndian) Uint16(b []byte) uint16 {
	_ = b[1] // bounds check hint to compiler; see golang.org/issue/14808
	return uint16(b[1]) | uint16(b[0])<<8
}

func LeUint64(b []byte) uint64 {
	_ = b[7] // bounds check hint to compiler; see golang.org/issue/14808
	return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
		uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
}

func LePutUint64(b []byte, v uint64) {
	_ = b[7] // early bounds check to guarantee safety of writes below
	b[0] = byte(v)
	b[1] = byte(v >> 8)
	b[2] = byte(v >> 16)
	b[3] = byte(v >> 24)