1// run
2
3// Copyright 2012 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 3907: out of fixed registers in nested byte multiply.
8// Used to happen with both 6g and 8g.
9
10package main
11
12func F(a, b, c, d uint8) uint8 {
13	return a * (b * (c * (d *
14		(a * (b * (c * (d *
15			(a * (b * (c * (d *
16				a * (b * (c * d)))))))))))))
17}
18
19func main() {
20	var a, b, c, d uint8 = 1, 1, 1, 1
21	x := F(a, b, c, d)
22	if x != 1 {
23		println(x)
24		panic("x != 1")
25	}
26}
27