mirror of
https://github.com/golang/go
synced 2024-11-23 14:10:05 -07:00
f1ef5a06d2
Fixes #16985. Change-Id: I5954db28f7b70dd3ac7768e471d5df871a5b20f9 Reviewed-on: https://go-review.googlesource.com/28510 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
38 lines
625 B
Go
38 lines
625 B
Go
// 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++
|
|
}
|
|
}
|