Optimize functions containing try-catch.

tests/language/try_catch4_test.dart

 // Copyright (c) 2012, 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.
 // Check that our SSA graph does have the try body a predecessor of a
 // try/finally.
 
 import "package:expect/expect.dart";
 
 var a;
 
@@ skipping 157 matching lines @@
       entered = true;
       continue;
     } finally {
       b = 8 == a;
       entered = true;
       continue;
     }
   }
 }
 
-main() {
+main_test() {
   a = 0;
   Expect.isTrue(foo1());
   a = 0;
   Expect.isTrue(foo2());
   a = 0;
   Expect.isTrue(foo3());
   a = 0;
   Expect.isTrue(foo4());
   a = 0;
   Expect.isTrue(foo5());
   a = 0;
   Expect.isTrue(foo6());
   a = 0;
   Expect.isTrue(foo7());
   a = 0;
   Expect.isTrue(foo8());
   a = 0;
   Expect.isTrue(foo9());
 }
+
+main() {
+  for (var i = 0; i < 2000; i++) {
+    main_test();
+  }
+}