2011-01-18 Michael Saboff <msaboff@apple.com>

2011-01-18  Michael Saboff  <msaboff@apple.com>

        Reviewed by Oliver Hunt.

        <rdar://problem/8875432> Regression: Some text-only e-mails cause hang beneath RegExp::match (52540)
        https://bugs.webkit.org/show_bug.cgi?id=52540
        https://bugs.webkit.org/show_bug.cgi?id=52662

        Directly use backtrack label with parentheses nested under a
        non-capturing parentheses.  Also linked current parentheses
        tail code object for possible parens nested within a non-capturing
        parentheses.

        * yarr/YarrJIT.cpp:
        (JSC::Yarr::YarrGenerator::BacktrackDestination::linkBacktrackToLabel):
        (JSC::Yarr::YarrGenerator::generateParenthesesSingle):
2011-01-18  Michael Saboff  <msaboff@apple.com>

        Reviewed by Oliver Hunt.

        <rdar://problem/8875432> Regression: Some text-only e-mails cause hang beneath RegExp::match (52540)
        https://bugs.webkit.org/show_bug.cgi?id=52540
        https://bugs.webkit.org/show_bug.cgi?id=52662

        New tests to check for proper linking of parentheses nested under
        a non-capturing parentheses.

        * fast/regex/parentheses-expected.txt:
        * fast/regex/script-tests/parentheses.js:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@76076 268f45cc-cd09-0410-ab3c-d52691b4dbfc