/usr/share/go-1.8/test/fixedbugs/issue11987.go is in golang-1.8-src 1.8.3-2ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | // run
// Copyright 2015 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.
// Issue 11987. The ppc64 SRADCC instruction was misassembled in a way
// lost bit 5 of the immediate so v>>32 was assembled as v>>0. SRADCC
// is only ever inserted by peep so it's hard to be sure when it will
// be used. This formulation worked when the bug was fixed.
package main
import "fmt"
var v int64 = 0x80000000
func main() {
s := fmt.Sprintf("%v", v>>32 == 0)
if s != "true" {
fmt.Printf("BUG: v>>32 == 0 evaluated as %q\n", s)
}
}
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