r1, _, e1 := syscall.Syscall(procMoveFileExW.Addr(), 3, uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(to)), uintptr(flags))
	if r1 == 0 {
		err = errnoErr(e1)
	}
	return
}

func MoveFile(from *uint16, to *uint16) (err error) {
	r1, _, e1 := syscall.Syscall(procMoveFileW.Addr(), 2, uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(to)), 0)
	if r1 == 0 {
		err = errnoErr(e1)
	}
	return
}

// These optimizations need to be synchronized with the asmout function.
func (o *Optab) size(ctxt *obj.Link, p *obj.Prog) int {
	// Optimize adrp+add+ld/st to adrp+ld/st(offset).
	sz := movesize(p.As)
	if sz != -1 {
		// Relocations R_AARCH64_LDST{64,32,16,8}_ABS_LO12_NC can only generate 8-byte, 4-byte,
		// 2-byte and 1-byte aligned addresses, so the address of load/store must be aligned.