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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
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// issue 16985: intrinsified AMD64 atomic ops should clobber flags
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package main
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import "sync/atomic"
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var count uint32
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func main() {
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buffer := []byte("T")
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for i := 0; i < len(buffer); {
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atomic.AddUint32(&count, 1)
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_ = buffer[i]
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i++
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i++
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}
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for i := 0; i < len(buffer); {
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atomic.CompareAndSwapUint32(&count, 0, 1)
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_ = buffer[i]
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i++
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i++
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}
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for i := 0; i < len(buffer); {
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atomic.SwapUint32(&count, 1)
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_ = buffer[i]
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i++
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i++
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}
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}
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