1// run
2
3//go:build !wasm
4
5// Copyright 2021 The Go Authors. All rights reserved.
6// Use of this source code is governed by a BSD-style
7// license that can be found in the LICENSE file.
8
9// wasm is excluded because the compiler chatter about register abi pragma ends up
10// on stdout, and causes the expected output to not match.
11
12package main
13
14var sink int
15
16//go:registerparams
17//go:noinline
18func F(a, b, c, d, e, f, g, h, i, j, k, l, m *int) {
19	G(m, l, k, j, i, h, g, f, e, d, c, b, a)
20	// did the pointers get properly updated?
21	sink = *a + *m
22}
23
24//go:registerparams
25//go:noinline
26func G(a, b, c, d, e, f, g, h, i, j, k, l, m *int) {
27	// Do not reference the parameters
28	var scratch [1000 * 100]int
29	I := *c - *e - *l // zero.
30	scratch[I] = *d
31	println("Got this far!")
32	sink += scratch[0]
33}
34
35func main() {
36	a, b, c, d, e, f, g, h, i, j, k, l, m := 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
37	F(&a, &b, &c, &d, &e, &f, &g, &h, &i, &j, &k, &l, &m)
38	println("Sink =", sink-7)
39}
40