| // run | |
| // Copyright 2018 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| // Issue 26438: arm64 backend may use 64-bit TST for | |
| // "if uint32(a)&uint32(b) == 0", which should be | |
| // 32-bit TSTW | |
| package main | |
| //go:noinline | |
| func tstw(a, b uint64) uint64 { | |
| if uint32(a)&uint32(b) == 0 { | |
| return 100 | |
| } else { | |
| return 200 | |
| } | |
| } | |
| func main() { | |
| if tstw(0xff00000000, 0xaa00000000) == 200 { | |
| panic("impossible") | |
| } | |
| } |