// Bigger list
	l2 := _New[int]()
	e2 := l2.PushFront(2)
	e1 := l2.PushFront(1)
	e3 := l2.PushBack(3)
	e4 := l2.PushBack(600)
	checkListPointers(l2, []*(_Element[int]){e1, e2, e3, e4})

	l2.Remove(e2)
	checkListPointers(l2, []*(_Element[int]){e1, e3, e4})

	l2.MoveToFront(e3) // move from middle
	checkListPointers(l2, []*(_Element[int]){e3, e1, e4})

	l2.MoveToFront(e1)

	l2 := typecheck.Conv(n.Args[1].(*ir.MakeExpr).Len, types.Types[types.TINT])
	l2 = typecheck.Expr(l2)
	n.Args[1] = l2 // walkAppendArgs expects l2 in n.List.Second().

	walkAppendArgs(n, init)

	l1 := n.Args[0]
	l2 = n.Args[1] // re-read l2, as it may have been updated by walkAppendArgs

	var nodes []ir.Node

	// if l2 >= 0 (likely happens), do nothing

	c = (v.l1 + c) >> 51
	c = (v.l2 + c) >> 51
	c = (v.l3 + c) >> 51
	c = (v.l4 + c) >> 51

	// If v < 2^255 - 19 and c = 0, this will be a no-op. Otherwise, it's
	// effectively applying the reduction identity to the carry.
	v.l0 += 19 * c

	v.l1 += v.l0 >> 51
	v.l0 = v.l0 & maskLow51Bits
	v.l2 += v.l1 >> 51
	v.l1 = v.l1 & maskLow51Bits
	v.l3 += v.l2 >> 51
	v.l2 = v.l2 & maskLow51Bits
	v.l4 += v.l3 >> 51

// two offAddrs.
func (l1 offAddr) diff(l2 offAddr) uintptr {
	return l1.a - l2.a
}

// lessThan returns true if l1 is less than l2 in the offset
// address space.
func (l1 offAddr) lessThan(l2 offAddr) bool {
	return (l1.a - arenaBaseOffset) < (l2.a - arenaBaseOffset)
}

// lessEqual returns true if l1 is less than or equal to l2 in
// the offset address space.

// TODO(kramm): Move this pattern to canonicalize.td?
def DecomposeResourceApplyFtrl : Pat<
  (TF_ResourceApplyFtrlOp $var, $accum, $linear, $grad, $lr, $l1, $l2,
     $lr_power, $use_locking, $multiply_linear_by_lr),
  (TF_ResourceApplyFtrlV2Op $var, $accum, $linear, $grad, $lr, $l1, $l2,
     (TF_ConstOp (GetScalarOfType<0> $lr_power)), $lr_power, $use_locking, $multiply_linear_by_lr)>;

            project.l1.extensions.create("l2", Extension, "l2")
            project.l1.l2.extensions.create("l3", Extension, "l3")

            task test {
                doLast {
                    assert project.l1.name == "l1"
                    assert project.l1.l2.name == "l2"
                    assert project.l1.l2.l3.name == "l3"
                }
            }
        '''

func (p *pageAlloc) tryChunkOf(ci chunkIdx) *pallocData {
	l2 := p.chunks[ci.l1()]
	if l2 == nil {
		return nil
	}
	return &l2[ci.l2()]
}

// chunkOf returns the chunk at the given chunk index.
//
// The chunk index must be valid or this method may throw.
func (p *pageAlloc) chunkOf(ci chunkIdx) *pallocData {
	return &p.chunks[ci.l1()][ci.l2()]
}

		checkPos(t, "1. PositionFor adjusted", got2, want)
		checkPos(t, "1. Position", got3, want)
	}

	// manually add //line info on lines l1, l2
	const l1, l2 = 5, 7
	f.AddLineInfo(f.lines[l1-1], "", 100)
	f.AddLineInfo(f.lines[l2-1], "bar", 3)

	// unadjusted position info must remain unchanged
	for i, offs := range f.lines {
		got1 := f.PositionFor(f.Pos(offs), false)

	}
	i, l := n.readVarint(1)
	i2, l2 := n.readVarint(1 + i + l)
	return unsafe.String(n.data(1+i+l+i2, "non-empty string"), l2)
}

func pkgPath(n abi.Name) string {
	if n.Bytes == nil || *n.DataChecked(0, "name flag field")&(1<<2) == 0 {
		return ""
	}
	i, l := n.ReadVarint(1)
	off := 1 + i + l
	if n.HasTag() {
		i2, l2 := n.ReadVarint(off)
		off += i2 + l2
	}
	var nameOff int32

			// makes sure there is nothing too deep being copied.
			l1 := o.safeExpr(n.X)
			l2 := ir.DeepCopy(src.NoXPos, l1)
			if l2.Op() == ir.OINDEXMAP {
				l2 := l2.(*ir.IndexExpr)
				l2.Assigned = false
			}
			l2 = o.copyExpr(l2)
			r := o.expr(typecheck.Expr(ir.NewBinaryExpr(n.Pos(), n.AsOp, l2, n.Y)), nil)
			as := typecheck.Stmt(ir.NewAssignStmt(n.Pos(), l1, r))
			o.mapAssign(as)
			o.popTemp(t)