| // run | |
| // Copyright 2016 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 16985: intrinsified AMD64 atomic ops should clobber flags | |
| package main | |
| import "sync/atomic" | |
| var count uint32 | |
| func main() { | |
| buffer := []byte("T") | |
| for i := 0; i < len(buffer); { | |
| atomic.AddUint32(&count, 1) | |
| _ = buffer[i] | |
| i++ | |
| i++ | |
| } | |
| for i := 0; i < len(buffer); { | |
| atomic.CompareAndSwapUint32(&count, 0, 1) | |
| _ = buffer[i] | |
| i++ | |
| i++ | |
| } | |
| for i := 0; i < len(buffer); { | |
| atomic.SwapUint32(&count, 1) | |
| _ = buffer[i] | |
| i++ | |
| i++ | |
| } | |
| } |