case et.Size_ == 1:
		lenmem = uintptr(oldLen)
		newlenmem = uintptr(newLen)
		capmem = roundupsize(uintptr(newcap), noscan)
		overflow = uintptr(newcap) > maxAlloc
		newcap = int(capmem)
	case et.Size_ == goarch.PtrSize:
		lenmem = uintptr(oldLen) * goarch.PtrSize
		newlenmem = uintptr(newLen) * goarch.PtrSize
		capmem = roundupsize(uintptr(newcap)*goarch.PtrSize, noscan)
		overflow = uintptr(newcap) > maxAlloc/goarch.PtrSize

	return unsafe.String((*byte)(p), size), unsafe.Slice((*byte)(p), size)
}

// rawbyteslice allocates a new byte slice. The byte slice is not zeroed.
func rawbyteslice(size int) (b []byte) {
	cap := roundupsize(uintptr(size), true)
	p := mallocgc(cap, nil, false)
	if cap != uintptr(size) {
		memclrNoHeapPointers(add(p, uintptr(size)), cap-uintptr(size))
	}

	*(*slice)(unsafe.Pointer(&b)) = slice{p, size, int(cap)}