1 files changed, 27 insertions, 0 deletions
diff --git a/test/fixedbugs/issue27829.go b/test/fixedbugs/issue27829.go
new file mode 100644
index 0000000..9204043
--- /dev/null
+++ b/test/fixedbugs/issue27829.go
@@ -0,0 +1,27 @@
+// run
+
+// 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.
+
+// Bad AND/BTR combination rule.
+
+package main
+
+import "fmt"
+
+//go:noinline
+func f(x uint64) uint64 {
+	return (x >> 48) &^ (uint64(0x4000))
+}
+
+func main() {
+	bad := false
+	if got, want := f(^uint64(0)), uint64(0xbfff); got != want {
+		fmt.Printf("got %x, want %x\n", got, want)
+		bad = true
+	}
+	if bad {
+		panic("bad")
+	}
+}