1 files changed, 61 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/test/testdata/append_test.go b/src/cmd/compile/internal/test/testdata/append_test.go
new file mode 100644
index 0000000000..6663ce75fa
--- /dev/null
+++ b/src/cmd/compile/internal/test/testdata/append_test.go
@@ -0,0 +1,61 @@
+// 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.
+
+// append_ssa.go tests append operations.
+package main
+
+import "testing"
+
+//go:noinline
+func appendOne_ssa(a []int, x int) []int {
+	return append(a, x)
+}
+
+//go:noinline
+func appendThree_ssa(a []int, x, y, z int) []int {
+	return append(a, x, y, z)
+}
+
+func eqBytes(a, b []int) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i := range a {
+		if a[i] != b[i] {
+			return false
+		}
+	}
+	return true
+}
+
+func expect(t *testing.T, got, want []int) {
+	if eqBytes(got, want) {
+		return
+	}
+	t.Errorf("expected %v, got %v\n", want, got)
+}
+
+func testAppend(t *testing.T) {
+	var store [7]int
+	a := store[:0]
+
+	a = appendOne_ssa(a, 1)
+	expect(t, a, []int{1})
+	a = appendThree_ssa(a, 2, 3, 4)
+	expect(t, a, []int{1, 2, 3, 4})
+	a = appendThree_ssa(a, 5, 6, 7)
+	expect(t, a, []int{1, 2, 3, 4, 5, 6, 7})
+	if &a[0] != &store[0] {
+		t.Errorf("unnecessary grow")
+	}
+	a = appendOne_ssa(a, 8)
+	expect(t, a, []int{1, 2, 3, 4, 5, 6, 7, 8})
+	if &a[0] == &store[0] {
+		t.Errorf("didn't grow")
+	}
+}
+
+func TestAppend(t *testing.T) {
+	testAppend(t)
+}