1 // run 2 3 // Copyright 2015 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 12133. The CX register was getting clobbered 8 // because we did not keep track of its allocation correctly. 9 10 package main 11 12 import "fmt" 13 14 func main() { 15 want := uint(48) 16 got := f1(48) 17 if got != want { 18 fmt.Println("got", got, ", wanted", want) 19 panic("bad") 20 } 21 } 22 23 //go:noinline 24 func f1(v1 uint) uint { 25 return v1 >> ((1 >> v1) + (1 >> v1)) 26 } 27
