This patch

http://gcc.gnu.org/ml/gcc-patches/2008-01/msg00191.html

miscompiled 481.wrf in SPEC CPU 2006 on Linux/Intel64 with -O2 -ffast-math.
The resulting 481.wrf segfaulted.


-- 
           Summary: [4.3 regression]: revision 131342 miscompiled 481.wrf on
                    Linux/Intel64
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl at lucon dot org
GCC target triplet: x86_64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34709

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