1 files changed, 37 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/test/testdata/map_test.go b/src/cmd/compile/internal/test/testdata/map_test.go
new file mode 100644
index 0000000000..71dc820c1c
--- /dev/null
+++ b/src/cmd/compile/internal/test/testdata/map_test.go
@@ -0,0 +1,37 @@
+// 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.
+
+// map.go tests map operations.
+package main
+
+import "testing"
+
+//go:noinline
+func lenMap_ssa(v map[int]int) int {
+	return len(v)
+}
+
+func testLenMap(t *testing.T) {
+
+	v := make(map[int]int)
+	v[0] = 0
+	v[1] = 0
+	v[2] = 0
+
+	if want, got := 3, lenMap_ssa(v); got != want {
+		t.Errorf("expected len(map) = %d, got %d", want, got)
+	}
+}
+
+func testLenNilMap(t *testing.T) {
+
+	var v map[int]int
+	if want, got := 0, lenMap_ssa(v); got != want {
+		t.Errorf("expected len(nil) = %d, got %d", want, got)
+	}
+}
+func TestMap(t *testing.T) {
+	testLenMap(t)
+	testLenNilMap(t)
+}