[Webkit-unassigned] [Bug 54687] New: Invalid label can be added into backtrack when building with armcc

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=54687

           Summary: Invalid label can be added into backtrack when
                    building with armcc
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Blocker
          Priority: P1
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: yong.li.webkit at gmail.com
                CC: staikos at kde.org


Yarr::GenerationState::BacktrackDestination::hasDataLabel() doesn't work when it is built with armcc, because JmpDst::isSet compares m_offset against -1, and m_offset is declared with "int m_offset : 31". According to standards, it depends on the compiler implementation that "int" bit field is signed or unsigned. After changing it to "signed int m_offset : 31", it works well.

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