The following rule is not handled by GCC

(a & x) || (a & y) ===>  a & (x | y)


-- 
           Summary: Missing expression simplication for conditional OR
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: xinliangli at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35306

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