[Bug fortran/33850] New: Unneeded temporary generated for LHS index of array assignment

[burnus at gcc dot gnu dot org]

For
   integer(4) :: p(4) = (/2,4,1,3/)
   integer(4) :: q(4) = (/2,4,1,3/)
   p(q) = (/(i, i = 1, 4)/)

gfortran generates an unneeded temporary, which is only needed for
   integer(4) :: p(4) = (/2,4,1,3/)
   p(p) = (/(i, i = 1, 4)/)

Cf. PR 33749


-- 
           Summary: Unneeded temporary generated for LHS index of array
                    assignment
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33850