if s.Value[0] == 0 {
					return nil, nil, fmt.Errorf("parsing sample %s: second value must be non-zero", line)
				}
				s.NumLabel = map[string][]int64{"bytes": {s.Value[1] / s.Value[0]}}
				s.Value[0], s.Value[1] = scaleHeapSample(s.Value[0], s.Value[1], javaHeapzSamplingRate)
			case "contention":
				if period := p.Period; period != 0 {
					s.Value[0] = s.Value[0] * p.Period

func storeOrder(values []*Value, sset *sparseSet, storeNumber []int32) []*Value {
	if len(values) == 0 {
		return values
	}

	f := values[0].Block.Func

	// find all stores

	// Members of values that are store values.
	// A constant bound allows this to be stack-allocated. 64 is
	// enough to cover almost every storeOrder call.
	stores := make([]*Value, 0, 64)
	hasNilCheck := false

	var oldSched []*Value
	for _, b := range s.visitOrder {
		nfirst := 0
		for _, v := range b.Values {
			if !mustBeFirst(v.Op) {
				break
			}
			nfirst++
		}
		oldSched = append(oldSched[:0], b.Values[nfirst:]...)
		b.Values = b.Values[:nfirst]
		b.Values = append(b.Values, start[b.ID]...)
		for _, v := range oldSched {
			b.Values = append(b.Values, v)

func (s *stackAllocState) init(f *Func, spillLive [][]ID) {
	s.f = f

	// Initialize value information.
	if n := f.NumValues(); cap(s.values) >= n {
		s.values = s.values[:n]
	} else {
		s.values = make([]stackValState, n)
	}
	for _, b := range f.Blocks {
		for _, v := range b.Values {
			s.values[v.ID].typ = v.Type

		// ops that generate memory values.
		ss.clear()
		for _, v := range b.Values {
			if v.Op == OpPhi || !v.Type.IsMemory() {
				continue
			}
			if m := v.MemoryArg(); m != nil {
				ss.add(m.ID)
			}
		}
		// There should be at most one remaining unoverwritten memory value.
		for _, v := range b.Values {
			if !v.Type.IsMemory() {
				continue
			}

	for _, x := range a {
		x.Uses++
	}
}
func (v *Value) SetArg(i int, w *Value) {
	v.Args[i].Uses--
	v.Args[i] = w
	w.Uses++
}
func (v *Value) SetArgs1(a *Value) {
	v.resetArgs()
	v.AddArg(a)
}
func (v *Value) SetArgs2(a, b *Value) {
	v.resetArgs()
	v.AddArg(a)
	v.AddArg(b)
}
func (v *Value) SetArgs3(a, b, c *Value) {
	v.resetArgs()
	v.AddArg(a)
	v.AddArg(b)
	v.AddArg(c)

				lhs0[i] = NewVar(name.Pos(), pkg, name.Value, nil)
			}

			// initialize all variables
			values := syntax.UnpackListExpr(s.Values)
			for i, obj := range lhs0 {
				var lhs []*Var
				var init syntax.Expr
				switch len(values) {
				case len(s.NameList):
					// lhs and rhs match
					init = values[i]
				case 1:
					// rhs is expected to be a multi-valued expression
					lhs = lhs0

			}
		}
	}

	// Update named values.
	for _, name := range f.Names {
		values := f.NamedValues[*name]
		for i, v := range values {
			if v.Op == OpCopy {
				values[i] = v.Args[0]
			}
		}
	}
}

// copySource returns the (non-copy) op which is the
// ultimate source of v.  v must be a copy op.
func copySource(v *Value) *Value {
	w := v.Args[0]

	// This loop is just:

	// points a value to itself. If a value is known non-nil because we
	// already did a nil check on it, it points to the nil check operation.
	nonNilValues := f.Cache.allocValueSlice(f.NumValues())
	defer f.Cache.freeValueSlice(nonNilValues)

	// make an initial pass identifying any non-nil values
	for _, b := range f.Blocks {
		for _, v := range b.Values {
			// a value resulting from taking the address of a

The new [unique] package provides facilities for
canonicalizing values (like "interning" or "hash-consing").

Any value of comparable type may be canonicalized with the new
`Make[T]` function, which produces a reference to a canonical copy of
the value in the form of a `Handle[T]`.
Two `Handle[T]` are equal if and only if the values used to produce the
handles are equal, allowing programs to deduplicate values and reduce
their memory footprint.