1 files changed, 62 insertions, 0 deletions
diff --git a/test/fixedbugs/issue24449.go b/test/fixedbugs/issue24449.go
new file mode 100644
index 0000000..b236645
--- /dev/null
+++ b/test/fixedbugs/issue24449.go
@@ -0,0 +1,62 @@
+// 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")
+	}
+}