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-rw-r--r--test/fixedbugs/issue13171.go34
1 files changed, 34 insertions, 0 deletions
diff --git a/test/fixedbugs/issue13171.go b/test/fixedbugs/issue13171.go
new file mode 100644
index 0000000..addb872
--- /dev/null
+++ b/test/fixedbugs/issue13171.go
@@ -0,0 +1,34 @@
+// run
+
+// Copyright 2015 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
+
+// Make sure the compiler knows that DUFFCOPY clobbers X0
+
+import "fmt"
+
+//go:noinline
+func f(x float64) float64 {
+ // y is allocated to X0
+ y := x + 5
+ // marshals z before y. Marshaling z
+ // calls DUFFCOPY.
+ return g(z, y)
+}
+
+//go:noinline
+func g(b [64]byte, y float64) float64 {
+ return y
+}
+
+var z [64]byte
+
+func main() {
+ got := f(5)
+ if got != 10 {
+ panic(fmt.Sprintf("want 10, got %f", got))
+ }
+}