/usr/share/go-1.6/test/fixedbugs/issue4448.go is in golang-1.6-src 1.6.1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | // run
// Copyright 2012 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 4448: 64-bit indices that are statically known
// to be bounded make 5g and 8g generate a dangling branch.
package main
const b26 uint64 = 0x022fdd63cc95386d
var bitPos [64]int
func init() {
for p := uint(0); p < 64; p++ {
bitPos[b26<<p>>58] = int(p)
}
}
func MinPos(w uint64) int {
if w == 0 {
panic("bit: MinPos(0) undefined")
}
return bitPos[((w&-w)*b26)>>58]
}
func main() {
const one = uint64(1)
for i := 0; i < 64; i++ {
if MinPos(1<<uint(i)) != i {
println("i =", i)
panic("MinPos(1<<uint(i)) != i")
}
}
}
|