1// run
2
3// Copyright 2018 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
7// Issue 26438: arm64 backend may use 64-bit TST for
8// "if uint32(a)&uint32(b) == 0", which should be
9// 32-bit TSTW
10
11package main
12
13//go:noinline
14func tstw(a, b uint64) uint64 {
15	if uint32(a)&uint32(b) == 0 {
16		return 100
17	} else {
18		return 200
19	}
20}
21
22func main() {
23	if tstw(0xff00000000, 0xaa00000000) == 200 {
24		panic("impossible")
25	}
26}
27