func AutoVar(v *Value) (*ir.Name, int64) {
	if loc, ok := v.Block.Func.RegAlloc[v.ID].(LocalSlot); ok {
		if v.Type.Size() > loc.Type.Size() {
			v.Fatalf("spill/restore type %s doesn't fit in slot type %s", v.Type, loc.Type)
		}
		return loc.N, loc.Off
	}
	// Assume it is a register, return its spill slot, which needs to be live
	nameOff := v.Aux.(*AuxNameOffset)
	return nameOff.Name, nameOff.Offset
}

	// Transition from C ABI to Go ABI.
	PUSH_REGS_HOST_TO_ABI0()

	// Set up ABIInternal environment: g in R14, cleared X15.
	get_tls(R12)
	MOVQ	g(R12), R14
	PXOR	X15, X15

	// Reserve space for spill slots.
	NOP	SP		// disable vet stack checking
	ADJSP   $24

	// Call into the Go signal handler
	MOVQ	DI, AX	// sig
	MOVQ	SI, BX	// info
	MOVQ	DX, CX	// ctx
	CALL	·sigtrampgo<ABIInternal>(SB)

	// we are still in function prologue. We need to fix the
	// SP data and PCDATA.
	spfix := obj.Appendp(last, newprog)
	spfix.As = obj.ANOP
	spfix.Spadj = -framesize

	pcdata := ctxt.EmitEntryStackMap(cursym, spfix, newprog)
	spill := ctxt.StartUnsafePoint(pcdata, newprog)
	pcdata = cursym.Func().SpillRegisterArgs(spill, newprog)

	call := obj.Appendp(pcdata, newprog)

	p.As = obj.ANOP // zero-width place holder

	if q != nil {
		q.To.SetTarget(p)
	}

	// Spill the register args that could be clobbered by the
	// morestack code.

	spill := c.cursym.Func().SpillRegisterArgs(p, c.newprog)

	// MOVD LR, R5
	p = obj.Appendp(spill, c.newprog)
	p.As = AMOVD
	p.From.Type = obj.TYPE_REG
	p.From.Reg = REG_LR
	p.To.Type = obj.TYPE_REG

	add = AADDV
	mov = AMOVV
	if c.ctxt.Flag_maymorestack != "" {
		// Save LR and REGCTXT.
		frameSize := 2 * c.ctxt.Arch.PtrSize

		p = c.ctxt.StartUnsafePoint(p, c.newprog)

		// Spill Arguments. This has to happen before we open
		// any more frame space.
		p = c.cursym.Func().SpillRegisterArgs(p, c.newprog)

		// MOV	REGLINK, -8/-16(SP)
		p = obj.Appendp(p, c.newprog)
		p.As = mov

	// Transition from C ABI to Go ABI.
	PUSH_REGS_HOST_TO_ABI0()

	// Set up ABIInternal environment: g in R14, cleared X15.
	get_tls(R12)
	MOVQ	g(R12), R14
	PXOR	X15, X15

	// Reserve space for spill slots.
	NOP	SP		// disable vet stack checking
	ADJSP   $24

	// Call into the Go signal handler
	MOVQ	DI, AX	// sig
	MOVQ	SI, BX	// info
	MOVQ	DX, CX	// ctx
	CALL	·sigtrampgo<ABIInternal>(SB)

	hash := sha512.New512_256()

	// Here we make sure two different inputs can't write the same stream
	// to the hash. This delimiter is not in the base64.URLEncoding
	// alphabet so there is no way to have spill over collisions. Without
	// it 'CN:foo,ORG:bar' hashes to the same value as 'CN:foob,ORG:ar'
	const delimiter = '|'
	encode := base64.RawURLEncoding.EncodeToString

	write := func(data []byte) {

	{name: "ArraySelect", argLength: 1, aux: "Int64"}, // arg0=array, auxint=index. Returns a[i].

	// Spill&restore ops for the register allocator. These are
	// semantically identical to OpCopy; they do not take/return
	// stores like regular memory ops do. We can get away without memory
	// args because we know there is no aliasing of spill slots on the stack.
	{name: "StoreReg", argLength: 1},
	{name: "LoadReg", argLength: 1},

	for i, n := range fn.Dcl {
		if n.Op() != ir.ONAME || n.Class != ir.PAUTO && !(n.Class == ir.PPARAMOUT && n.IsOutputParamInRegisters()) {
			// i.e., stack assign if AUTO, or if PARAMOUT in registers (which has no predefined spill locations)
			continue
		}
		if mls != nil && mls.Subsumed(n) {
			continue
		}
		if !n.Used() {
			fn.DebugInfo.(*ssa.FuncDebug).OptDcl = fn.Dcl[i:]
			fn.Dcl = fn.Dcl[:i]
			break
		}

	pcdata = c.ctxt.StartUnsafePoint(pcdata, c.newprog)

	if q != nil {
		q.To.SetTarget(pcdata)
	}
	bls.To.SetTarget(pcdata)

	spill := c.cursym.Func().SpillRegisterArgs(pcdata, c.newprog)

	// MOV	LR, R3
	movlr := obj.Appendp(spill, c.newprog)
	movlr.As = AMOVD
	movlr.From.Type = obj.TYPE_REG
	movlr.From.Reg = REGLINK
	movlr.To.Type = obj.TYPE_REG
	movlr.To.Reg = REG_R3

	debug := movlr
	if false {