MOVM.DB.W [R4-R11], (R13)
	SUB	$16, R13

	// this might be called in external code context,
	// where g is not set.
	// first save R0, because runtime·load_g will clobber it
	MOVW	R0, 4(R13)
	MOVB	runtime·iscgo(SB), R0
	CMP 	$0, R0
	BL.NE	runtime·load_g(SB)

	MOVW	R1, 8(R13)
	MOVW	R2, 12(R13)
	MOVW  	$runtime·sigtrampgo(SB), R11
	BL	(R11)

	return nil // too far away
}

// clobber invalidates values. Returns true.
// clobber is used by rewrite rules to:
//
//	A) make sure the values are really dead and never used again.
//	B) decrement use counts of the values' args.
func clobber(vv ...*Value) bool {
	for _, v := range vv {
		v.reset(OpInvalid)
		// Note: leave v.Block intact.  The Block field is used after clobber.
	}
	return true
}

			break
		}
		v.reset(OpMove)
		v.AuxInt = int64ToAuxInt(n)
		v.Aux = typeToAux(t1)
		v.AddArg3(dst1, src1, mem)
		return true
	}
	// match: (Move {t} [n] dst1 src1 move:(Move {t} [n] dst2 _ mem))
	// cond: move.Uses == 1 && isSamePtr(dst1, dst2) && disjoint(src1, n, dst2, n) && clobber(move)
	// result: (Move {t} [n] dst1 src1 mem)

	f43([]*int{&p, &r, &q})
	f43([]*int{&q, &p, &r})
}

//go:noescape
func f43(a []*int)

// Assigning to a sub-element that makes up an entire local variable
// should clobber that variable.
func f44(f func() [2]*int) interface{} { // ERROR "live at entry to f44: f"
	type T struct {
		s [1][2]*int
	}
	ret := T{} // ERROR "stack object ret T"
	ret.s[0] = f()
	return ret

	// cond: x.Uses == 1 && clobber(x)
	// result: @x.Block (MOVBUload <t> [off] {sym} ptr mem)
	for {
		t := v.Type
		x := v_0
		if x.Op != OpRISCV64MOVBload {
			break
		}
		off := auxIntToInt32(x.AuxInt)
		sym := auxToSym(x.Aux)
		mem := x.Args[1]
		ptr := x.Args[0]
		if !(x.Uses == 1 && clobber(x)) {
			break
		}
		b = x.Block

				// during the execution of the function prologue, the traceback
				// code will not see a half-updated stack frame.
				// This sequence is not async preemptible, as if we open a frame
				// at the current SP, it will clobber the saved LR.
				q = c.ctxt.StartUnsafePoint(q, c.newprog)

				q = obj.Appendp(q, newprog)
				q.As = mov
				q.Pos = p.Pos
				q.From.Type = obj.TYPE_REG
				q.From.Reg = REGLINK

	} else {
		lea = ALEAL
		mov = AMOVL
		reg = REG_CX
		if p.As == ALEAL && p.To.Reg != p.From.Reg && p.To.Reg != p.From.Index {
			// Special case: clobber the destination register with
			// the PC so we don't have to clobber CX.
			// The SSA backend depends on CX not being clobbered across LEAL.
			// See cmd/compile/internal/ssa/gen/386.rules (search for Flag_shared).
			reg = p.To.Reg
		}
	}

		// It saves all GP registers if necessary,
		// but clobbers R14 (LR) because it's a call,
		// and also clobbers R1 as the PLT stub does.
		// Returns a pointer to a write barrier buffer in R9.
		{name: "LoweredWB", argLength: 1, reg: regInfo{clobbers: (callerSave &^ gpg) | buildReg("R14") | r1, outputs: []regMask{r9}}, clobberFlags: true, aux: "Int64"},

	if n&(n-1) != 0 {
		throw("stack not a power of 2")
	}
	if stk.lo+n < stk.hi {
		throw("bad stack size")
	}
	if stackDebug >= 1 {
		println("stackfree", v, n)
		memclrNoHeapPointers(v, n) // for testing, clobber stack data
	}
	if debug.efence != 0 || stackFromSystem != 0 {
		if debug.efence != 0 || stackFaultOnFree != 0 {
			sysFault(v, n)
		} else {
			sysFree(v, n, &memstats.stacks_sys)
		}
		return
	}

		fp2gp   = regInfo{inputs: []regMask{fpMask, fpMask}, outputs: []regMask{gpMask}}

		call        = regInfo{clobbers: callerSave}
		callClosure = regInfo{inputs: []regMask{gpspMask, regCtxt, 0}, clobbers: callerSave}
		callInter   = regInfo{inputs: []regMask{gpMask}, clobbers: callerSave}
	)

	RISCV64ops := []opData{
		{name: "ADD", argLength: 2, reg: gp21, asm: "ADD", commutative: true}, // arg0 + arg1