| // 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++ |
| } |
| } |
