| // run | |
| // Copyright 2011 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 | |
| // 5g bug used to set up the 0 for -f() before calling f, | |
| // and the call to f smashed the register. | |
| func f(n int) int { | |
| s := 0 | |
| for i := 0; i < n; i++ { | |
| s += i>>1 | |
| } | |
| return s | |
| } | |
| func main() { | |
| x := -f(100) | |
| if x != -2450 { | |
| println(x) | |
| panic("broken") | |
| } | |
| } |