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 16948: make sure intrinsified atomic ops won't
8// confuse the scheduler.
9
10package main
11
12import "sync/atomic"
13
14func main() {
15	f()
16}
17
18var x int32
19
20type T [10]int
21var sink *T
22
23func f() (t T) {
24	atomic.AddInt32(&x, 1)
25	g(42, 42, 42, 42, 42, &t) // use int values that is invalid pointer to smash the stack slot of return value of runtime.newobject
26	return
27}
28
29//go:noinline
30func g(a, b, c, d, e int, p *T) {
31	var t [10000]int // a large stack frame to trigger stack growing
32	_ = t
33	sink = p // force p (in caller) heap allocated
34}
35