[Bug middle-end/21180] New: [4.1 Regression] checking on fold is no longer happen in some cases

[pinskia at gcc dot gnu dot org]

the changes to use "fold_buildN" instead of "fold (buildN", makes us no do fold 
checking in those case.
This PR records that face.

-- 
           Summary: [4.1 Regression] checking on fold is no longer happen in
                    some cases
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21180