Add corelib tests

test/codegen/corelib/regexp/issue_19193_test.dart

Index: test/codegen/corelib/regexp/issue_19193_test.dart
diff --git a/test/codegen/language/dead_field_access_test.dart b/test/codegen/corelib/regexp/issue_19193_test.dart
similarity index 55%
copy from test/codegen/language/dead_field_access_test.dart
copy to test/codegen/corelib/regexp/issue_19193_test.dart
index e3fc11b6c5f33af074b45ea57a53194aadb20daa..52746cf5b67482b8921d03a3f4213c812b5df2a5 100644
--- a/test/codegen/language/dead_field_access_test.dart
+++ b/test/codegen/corelib/regexp/issue_19193_test.dart
@@ -4,17 +4,9 @@
 
 import 'package:expect/expect.dart';
 
-class Foo {
-  var field = 10;
-}
-
-@NoInline()
-getField(x) {
-  x.field;
-  return 34;
-}
-
+// Regression test for http://dartbug.com/19193
 main() {
-  Expect.equals(34, getField(new Foo()));
-  Expect.throws(() => getField(null));
+  RegExp re = new RegExp(r'.*(a+)+\d');
+  Expect.isTrue("a0aaaaaaaaaaaaa".contains(re));
+  Expect.isTrue("a0aaaaaaaaaaaaaa".contains(re)); // false when using JSCRE.
 }