Port and integrate the irregexp engine from V8

tests/language/regex/non-greedy-parentheses_test.dart

Index: tests/language/regex/non-greedy-parentheses_test.dart
diff --git a/tests/language/regex/non-greedy-parentheses_test.dart b/tests/language/regex/non-greedy-parentheses_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..9bcd7ea01379ea182cdbc90a6efdd150630f9abf
--- /dev/null
+++ b/tests/language/regex/non-greedy-parentheses_test.dart
@@ -0,0 +1,21 @@
+// 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.
+
+import 'util.dart';
+import 'package:expect/expect.dart';
+
+void main() {
+  description(
+  'Test for regression against <a href="https:new RegExp(r"/bugs.webkit.org/show_bug.cgi?id=39289">Wrong result in case of non-iterative matching of subpatterns in non-greedy cases in YARR Interpreter<")a>'
+  );
+
+  shouldBe(firstMatch("a", new RegExp(r"(a)??")), ["", null]);
+  shouldBe(firstMatch("b", new RegExp(r"(a)??")), ["", null]);
+  shouldBe(firstMatch("ab", new RegExp(r"(a)??b")), ["ab", "a"]);
+  shouldBe(firstMatch("aaab", new RegExp(r"(a+)??b")), ["aaab", "aaa"]);
+  shouldBe(firstMatch("abbc", new RegExp(r"(a)??(b+)??c")), ["abbc", "a", "bb"]);
+  shouldBe(firstMatch("ac", new RegExp(r"(a)??(b)??c")), ["ac", "a", null]);
+  shouldBe(firstMatch("abc", new RegExp(r"(a(b)??)??c")), ["abc", "ab", "b"]);
+  shouldBe(firstMatch("ac", new RegExp(r"(a(b)??)??c")), ["ac", "a", null]);
+}