| Dan Willemsen | 0c15709 | 2016-07-08 13:57:52 -0700 | [diff] [blame^] | 1 | // +build !386 |
| 2 | // run |
| 3 | |
| 4 | // Copyright 2015 The Go Authors. All rights reserved. |
| 5 | // Use of this source code is governed by a BSD-style |
| 6 | // license that can be found in the LICENSE file. |
| 7 | |
| 8 | // Issue 12411. Loss of AX during %. |
| 9 | |
| 10 | package main |
| 11 | |
| 12 | func main() { |
| 13 | x := f(4) |
| 14 | if x != 0 { |
| 15 | println("BUG: x=", x) |
| 16 | } |
| 17 | } |
| 18 | |
| 19 | //go:noinline |
| 20 | func f(x int) int { |
| 21 | // AX was live on entry to one of the % code generations, |
| 22 | // and the % code generation smashed it. |
| 23 | return ((2 * x) % 3) % (2 % ((x << 2) ^ (x % 3))) |
| 24 | } |