Make closures optimizable by Crankshaft compiler.

test/mjsunit/closures.js

Index: test/mjsunit/closures.js
diff --git a/test/mjsunit/closures.js b/test/mjsunit/closures.js
new file mode 100644
index 0000000000000000000000000000000000000000..d1a49ecb4a2e3a22a09baef8f2e1853ff96602c9
--- /dev/null
+++ b/test/mjsunit/closures.js
@@ -0,0 +1,45 @@
+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function runner(f, expected) {
+  for (var i = 0; i < 100000000; i++) {

[fschneider, 2010/12/17 13:36:22]

100M seems a bit high (at least for debug mode) - Could this count be lower to
save time when running the tests and still hit the function with the optimizer? 

[antonm, 2010/12/17 14:52:23]

Found minimal value for my pretty beefy box.  Let's hope we'll trigger it on
various others as well

+    assertEquals(expected, f.call(this));
+  }
+}
+
+function test(n) {
+  function MyFunction() {
+    var result = n * 2;
+    return result;
+  }
+  runner(MyFunction, n * 2);
+}
+
+test(1);
+test(42);
+test(239);
+