Infra for running lib tests

test/codegen/lib/typed_data/simd_store_to_load_forward_test.dart

Index: test/codegen/lib/typed_data/simd_store_to_load_forward_test.dart
diff --git a/test/codegen/lib/typed_data/simd_store_to_load_forward_test.dart b/test/codegen/lib/typed_data/simd_store_to_load_forward_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..4fae48f80f7d09be36fd7e9bf6b38ca87b0ccc2b
--- /dev/null
+++ b/test/codegen/lib/typed_data/simd_store_to_load_forward_test.dart
@@ -0,0 +1,30 @@
+// 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 tag to be able to run in html test framework.
+library simd_store_to_load_forward_test;
+
+import 'dart:typed_data';
+import "package:expect/expect.dart";
+
+Float32x4 testLoadStoreForwardingFloat32x4(Float32x4List l, Float32x4 v) {
+  l[1] = v;
+  var r = l[1];
+  return r;
+}
+
+
+main() {
+  Float32x4List l = new Float32x4List(4);
+  Float32x4 a = new Float32x4(1.0, 2.0, 3.0, 4.0);
+  Float32x4 b;
+  for (int i = 0; i < 20; i++) {
+    b = testLoadStoreForwardingFloat32x4(l, a);
+  }
+  Expect.equals(a.x, b.x);
+  Expect.equals(a.y, b.y);
+  Expect.equals(a.z, b.z);
+  Expect.equals(a.w, b.w);
+}