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 10 package main 11 12 func 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 19 func 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
