1 // run 2 3 // Copyright 2016 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 16985: intrinsified AMD64 atomic ops should clobber flags 8 9 package main 10 11 import "sync/atomic" 12 13 var count uint32 14 15 func main() { 16 buffer := []byte("T") 17 for i := 0; i < len(buffer); { 18 atomic.AddUint32(&count, 1) 19 _ = buffer[i] 20 i++ 21 i++ 22 } 23 24 for i := 0; i < len(buffer); { 25 atomic.CompareAndSwapUint32(&count, 0, 1) 26 _ = buffer[i] 27 i++ 28 i++ 29 } 30 31 for i := 0; i < len(buffer); { 32 atomic.SwapUint32(&count, 1) 33 _ = buffer[i] 34 i++ 35 i++ 36 } 37 } 38
