[LLVMbugs] [Bug 8541] New: Clang miscompiles libgcc's unwind-dw2.c

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8541

           Summary: Clang miscompiles libgcc's unwind-dw2.c
           Product: clang
           Version: 2.8
          Platform: PC
        OS/Version: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: ed at 80386.nl
                CC: llvmbugs at cs.uiuc.edu


FreeBSD HEAD is currently shipped with this version of clang:

$ clang --version
FreeBSD clang version 2.8 (tags/RELEASE_28 115870) 20101007

In this thread, it is reported that OpenOffice crashes when libgcc_s.so.1 is
built with this version of Clang:

http://lists.freebsd.org/pipermail/freebsd-current/2010-November/020843.html

It turns out that this is due to some kind of miscompilation of unwind-dw2.c.
This is our version of unwind-dw2.c:

http://svn.freebsd.org/viewvc/base/head/contrib/gcc/unwind-dw2.c?view=markup

Although I realize this bug report may be too incomplete to be useful, but I'd
rather stick it here in Bugzilla to prevent it from getting lost.

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