Infra for running lib tests

test/codegen/lib/typed_data/int64_list_load_store_test.dart

Index: test/codegen/lib/typed_data/int64_list_load_store_test.dart
diff --git a/test/codegen/lib/typed_data/int64_list_load_store_test.dart b/test/codegen/lib/typed_data/int64_list_load_store_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..6dd09c67f0fbb40a57fc488fc103ac100af76e88
--- /dev/null
+++ b/test/codegen/lib/typed_data/int64_list_load_store_test.dart
@@ -0,0 +1,38 @@
+// Copyright (c) 2014, 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=--optimization-counter-threshold=10
+
+// Test that the compiler's load elimination phase sees interfering writes to
+// the array's buffer.
+
+import "dart:typed_data";
+import 'package:expect/expect.dart';
+
+void testStoreLoad(l, z) {
+  l[0] = 9223372036854775807;
+  l[1] = 9223372036854775806;
+  l[2] = l[0];
+  l[3] = z;
+  Expect.equals(l[0], 9223372036854775807);
+  Expect.equals(l[1], 9223372036854775806);
+  Expect.isTrue(l[1] < l[0]);
+  Expect.equals(l[2], l[0]);
+  Expect.equals(l[3], z);
+}
+
+main() {
+  var l = new Int64List(4);
+  var zGood = 9223372036854775807;
+  var zBad = false;
+  for (var i = 0; i < 40; i++) {
+    testStoreLoad(l, zGood);
+  }
+  // Deopt.
+  try {
+    testStoreLoad(l, zBad);
+  } catch (_) { }
+  for (var i = 0; i < 40; i++) {
+    testStoreLoad(l, zGood);
+  }
+}