// That's all we need when looking for well-known params.
		firstIdentifier := n.(*parse.FieldNode).Ident[0]
		out.Insert(firstIdentifier)
	case parse.NodeIf:
		out.Merge(getParams(n.(*parse.IfNode).Pipe))
	case parse.NodeWith:
		out.Merge(getParams(n.(*parse.WithNode).Pipe))
	case parse.NodeRange:
		out.Merge(getParams(n.(*parse.RangeNode).Pipe))
	case parse.NodeAction:

	if v := unsafe.Sizeof(si); v != 128 {
		t.Fatalf("sizeof: got %d, want 128", v)
	}

	ofSigno := 0
	ofErrno := 4
	ofCode := 8
	if strings.HasPrefix(runtime.GOARCH, "mips") {
		// These two fields are swapped on MIPS platforms.
		ofErrno, ofCode = ofCode, ofErrno
	}
	ofPid := 12
	if host64bit {
		ofPid = 16
	}
	ofUid := ofPid + 4
	ofStatus := ofPid + 8

	offsets := []struct {

func lfnodeValidate(node *lfnode) {
	if base, _, _ := findObject(uintptr(unsafe.Pointer(node)), 0, 0); base != 0 {
		throw("lfstack node allocated from the heap")
	}
	if lfstackUnpack(lfstackPack(node, ^uintptr(0))) != node {
		printlock()
		println("runtime: bad lfnode address", hex(uintptr(unsafe.Pointer(node))))
		throw("bad lfnode address")
	}
}

func lfstackPack(node *lfnode, cnt uintptr) uint64 {

	return (*LFNode)(unsafe.Pointer(node))
}

func toMyNode(node *LFNode) *MyNode {
	return (*MyNode)(unsafe.Pointer(node))
}

var global any

func TestLFStack(t *testing.T) {
	stack := new(uint64)
	global = stack // force heap allocation

	// Check the stack is initially empty.
	if LFStackPop(stack) != nil {
		t.Fatalf("stack is not empty")
	}

	// Push one element.

		valid := true
		switch mode := finfo.flags & fMode; mode {
		case 0:
			finfo.flags |= fElement
		case fAttr, fCDATA, fCharData, fInnerXML, fComment, fAny, fAny | fAttr:
			if f.Name == xmlName || tag != "" && mode != fAttr {
				valid = false
			}
		default:
			// This will also catch multiple modes in a single field.
			valid = false
		}
		if finfo.flags&fMode == fAny {
			finfo.flags |= fElement
		}

	unsafe.Offsetof(heapStatsDelta{}.inHeap),
	unsafe.Offsetof(heapStatsDelta{}.inStacks),
	unsafe.Offsetof(heapStatsDelta{}.inPtrScalarBits),
	unsafe.Offsetof(heapStatsDelta{}.inWorkBufs),
	unsafe.Offsetof(lfnode{}.next),
	unsafe.Offsetof(mstats{}.last_gc_nanotime),
	unsafe.Offsetof(mstats{}.last_gc_unix),
	unsafe.Offsetof(workType{}.bytesMarked),
}

// AtomicVariables is the set of global variables on which we perform