1// run
2
3// Copyright 2013 The Go Authors. All rights reserved.
4// Use of this source code is governed by a BSD-style
5// license that can be found in the LICENSE file.
6
7package main
8
9func F(xi, yi interface{}) uint64 {
10	x, y := xi.(uint64), yi.(uint64)
11	return x &^ y
12}
13
14func G(xi, yi interface{}) uint64 {
15	return xi.(uint64) &^ yi.(uint64) // generates incorrect code
16}
17
18func main() {
19	var x, y uint64 = 0, 1 << 63
20	f := F(x, y)
21	g := G(x, y)
22	if f != 0 || g != 0 {
23		println("F", f, "G", g)
24		panic("bad")
25	}
26}
27