mirror of
https://github.com/golang/go
synced 2024-11-27 05:31:31 -07:00
27 lines
558 B
Go
27 lines
558 B
Go
|
// compile
|
||
|
|
|
||
|
|
// Copyright 2018 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.
|
||
|
|
|
||
|
|
// Make sure dead write barriers are handled correctly.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
func f(p **int) {
|
||
|
|
// The trick here is to eliminate the block containing the write barrier,
|
||
|
|
// but only after the write barrier branches are inserted.
|
||
|
|
// This requires some delicate code.
|
||
|
|
i := 0
|
||
|
|
var b []bool
|
||
|
|
var s string
|
||
|
|
for true {
|
||
|
|
if b[i] {
|
||
|
|
var a []string
|
||
|
|
s = a[len(s)]
|
||
|
|
i = 0
|
||
|
|
}
|
||
|
|
*p = nil
|
||
|
|
}
|
||
|
|
}
|