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// run
// Copyright 2018 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.
package main
import (
"sync/atomic"
)
var cnt32 int32
//go:noinline
func test32(a, b []int) bool {
// Try to generate flag value, issue atomic
// adds and then re-use the flag value to see if
// the atomic add has clobbered them.
atomic.AddInt32(&cnt32, 1)
if len(a) == len(b) {
atomic.AddInt32(&cnt32, 2)
}
atomic.AddInt32(&cnt32, 4)
if len(a) >= len(b) {
atomic.AddInt32(&cnt32, 8)
}
if len(a) <= len(b) {
atomic.AddInt32(&cnt32, 16)
}
return atomic.LoadInt32(&cnt32) == 31
}
var cnt64 int64
//go:noinline
func test64(a, b []int) bool {
// Try to generate flag value, issue atomic
// adds and then re-use the flag value to see if
// the atomic add has clobbered them.
atomic.AddInt64(&cnt64, 1)
if len(a) == len(b) {
atomic.AddInt64(&cnt64, 2)
}
atomic.AddInt64(&cnt64, 4)
if len(a) >= len(b) {
atomic.AddInt64(&cnt64, 8)
}
if len(a) <= len(b) {
atomic.AddInt64(&cnt64, 16)
}
return atomic.LoadInt64(&cnt64) == 31
}
func main() {
if !test32([]int{}, []int{}) {
panic("test32")
}
if !test64([]int{}, []int{}) {
panic("test64")
}
}
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