[Bug fortran/44235] New: array temporary with high upper bound

[tkoenig at gcc dot gnu dot org]

subroutine foo(a, b)
  real :: a(10), b(10)
  a(1:4:2) = a(2:4:2)
  b(1:3:2) = b(2:4:2)
end subroutine foo
i...@linux-fd1f:/tmp> gfortran -c -Warray-temporaries dep.f90
dep.f90:3.13:

  a(1:4:2) = a(2:4:2)
             1
Warnung: Creating array temporary at (1)

The upper bound of '4' in the first array assingment is no different
from '3'; the generation of the array temporary should be based on
the number of iterations, not the upper bound.


-- 
           Summary: array temporary with high upper bound
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tkoenig at gcc dot gnu dot org
OtherBugsDependingO 36854
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44235