[Bug optimization/12442] New: GCSE produces bad code

["rearnsha at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12442

           Summary: GCSE produces bad code
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: critical
          Priority: P1
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rearnsha at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: arm-netbsdelf

The attached code is incorrectly compiled with gcc-3.3.1 on arm-netbsdelf with
-O2 (with -O2 -fno-gcse the program executes correctly).