Infra for running lib tests

test/codegen/lib/typed_data/float64x2_typed_list_test.dart

Index: test/codegen/lib/typed_data/float64x2_typed_list_test.dart
diff --git a/test/codegen/lib/typed_data/float64x2_typed_list_test.dart b/test/codegen/lib/typed_data/float64x2_typed_list_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..b00cfd4ed165e63a9d2f5bda8ac904b55ff0d364
--- /dev/null
+++ b/test/codegen/lib/typed_data/float64x2_typed_list_test.dart
@@ -0,0 +1,33 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+// VMOptions=--deoptimization_counter_threshold=1000 --optimization-counter-threshold=10
+
+library float64x2_typed_list_test;
+
+import 'dart:typed_data';
+
+void test(Float64x2List l) {
+  var a = l[0];
+  var b = l[1];
+  l[0] = b;
+  l[1] = a;
+}
+
+bool compare(a, b) {
+  return (a.x == b.x) && (a.y == b.y);
+}
+
+main() {
+  var l = new Float64x2List(2);
+  var a = new Float64x2(1.0, 2.0);
+  var b = new Float64x2(3.0, 4.0);
+  l[0] = a;
+  l[1] = b;
+  for (var i = 0; i < 41; i++) {
+    test(l);
+  }
+  if (!compare(l[0], b) || !compare(l[1], a)) {
+    throw 123;
+  }
+}