1 files changed, 27 insertions, 0 deletions
diff --git a/test/fixedbugs/issue21963.go b/test/fixedbugs/issue21963.go
new file mode 100644
index 0000000..996bd63
--- /dev/null
+++ b/test/fixedbugs/issue21963.go
@@ -0,0 +1,27 @@
+// run
+
+// Copyright 2017 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.
+
+package main
+
+import (
+	"fmt"
+	"runtime"
+)
+
+//go:noinline
+func f(x []int32, y *int8) int32 {
+	c := int32(int16(*y))
+	runtime.GC()
+	return x[0] * c
+}
+
+func main() {
+	var x = [1]int32{5}
+	var y int8 = -1
+	if got, want := f(x[:], &y), int32(-5); got != want {
+		panic(fmt.Sprintf("wanted %d, got %d", want, got))
+	}
+}