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-rw-r--r--test/fixedbugs/issue25516.go26
1 files changed, 26 insertions, 0 deletions
diff --git a/test/fixedbugs/issue25516.go b/test/fixedbugs/issue25516.go
new file mode 100644
index 0000000..8326ef9
--- /dev/null
+++ b/test/fixedbugs/issue25516.go
@@ -0,0 +1,26 @@
+// 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
+ }
+}