func ssaMarkMoves(s *ssagen.State, b *ssa.Block) {
	flive := b.FlagsLiveAtEnd
	for _, c := range b.ControlValues() {
		flive = c.Type.IsFlags() || flive
	}
	for i := len(b.Values) - 1; i >= 0; i-- {
		v := b.Values[i]
		if flive && v.Op == ssa.Op386MOVLconst {
			// The "mark" is any non-nil Aux value.
			v.Aux = ssa.AuxMark
		}
		if v.Type.IsFlags() {
			flive = false
		}
		for _, a := range v.Args {

func ssaMarkMoves(s *ssagen.State, b *ssa.Block) {
	flive := b.FlagsLiveAtEnd
	for _, c := range b.ControlValues() {
		flive = c.Type.IsFlags() || flive
	}
	for i := len(b.Values) - 1; i >= 0; i-- {
		v := b.Values[i]
		if flive && v.Op == ssa.OpS390XMOVDconst {
			// The "mark" is any non-nil Aux value.
			v.Aux = ssa.AuxMark
		}
		if v.Type.IsFlags() {
			flive = false
		}
		for _, a := range v.Args {

			// Check to make sure only input variables are live.
			for i, n := range lv.vars {
				if !liveout.Get(int32(i)) {
					continue
				}
				if n.Class == ir.PPARAM {
					continue // ok
				}
				base.FatalfAt(n.Pos(), "bad live variable at entry of %v: %L", lv.fn.Nname, n)
			}

			// Record live variables.
			live := &lv.livevars[index]
			live.Or(*live, liveout)
		}

		if lv.doClobber {

	m2s[str()] = p // ERROR "live at call to mapassign_faststr: p$" "live at call to str: p$"
}

func f17c() {
	// key and value temporaries
	if b {
		m2s[str()] = f17d() // ERROR "live at call to f17d: .autotmp_[0-9]+$" "live at call to mapassign_faststr: .autotmp_[0-9]+$"
	}

	if a < 0 {
		// use in-reg args to keep them alive
		return a + b + c + d + e
	}
	return n
}

//go:noinline
func testTracebackArgs2(a bool, b struct {
	a, b, c int
	x       [2]int
}, _ [0]int, d [3]byte) int {
	n := runtime.Stack(testTracebackArgsBuf[:], false)
	if a {
		// use in-reg args to keep them alive
		return b.a + b.b + b.c + b.x[0] + b.x[1] + int(d[0]) + int(d[1]) + int(d[2])

	})

	// Make sure it stays alive.
	GC()
	GC()

	// In order to ensure the object can be freed, we now need to make sure to use
	// the entire arena. Exhaust the rest of the arena.

	for i := 0; i < int(UserArenaChunkBytes/unsafe.Sizeof(mediumScalarEven{})); i++ {
		var x any
		x = (*mediumScalarEven)(nil)
		arena.New(&x)
	}

	// Make sure it stays alive again.
	GC()
	GC()

	v = nil

// Once we're done processing all the pointers (including the ones we
// added during processing), we've found all the stack objects that
// are live. Any dead stack objects are not scanned and their contents
// will not keep heap objects live. Unlike the main garbage
// collection, we can't sweep the dead stack objects; they live on in
// a moribund state until the stack frame that contains them is
// popped.
//
// A stack can look like this:
//

	m2s[str()] = p // ERROR "live at call to mapassign_faststr: p$" "live at call to str: p$"
}

func f17c() {
	// key and value temporaries
	if b {
		m2s[str()] = f17d() // ERROR "live at call to f17d: .autotmp_[0-9]+$" "live at call to mapassign_faststr: .autotmp_[0-9]+$"
	}

		// or the other of hp and hu as the loop proceeds.
		//
		// hp is live during most of the body of the loop. But it isn't live
		// at the very top of the loop, when we haven't checked i<n yet, and
		// it could point off the end of the backing store.
		// hu is live only at the very top and very bottom of the loop.
		// In particular, only when it cannot possibly be live across a call.
		//
		// So we do

		s.interfere = s.interfere[:n]
	} else {
		s.interfere = make([][]ID, n)
	}
	live := f.newSparseSet(f.NumValues())
	defer f.retSparseSet(live)
	for _, b := range f.Blocks {
		// Propagate liveness backwards to the start of the block.
		// Two values interfere if one is defined while the other is live.
		live.clear()
		live.addAll(s.live[b.ID])
		for i := len(b.Values) - 1; i >= 0; i-- {
			v := b.Values[i]