File: modules.f95

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! { dg-additional-options -Wuninitialized }

MODULE reduction_test

CONTAINS

SUBROUTINE reduction_kernel(x_min,x_max,y_min,y_max,arr,sum)

  IMPLICIT NONE

  INTEGER      :: x_min,x_max,y_min,y_max
  REAL(KIND=8), DIMENSION(x_min-2:x_max+2,y_min-2:y_max+2) :: arr
  REAL(KIND=8) :: sum

  INTEGER      :: j,k

  sum=0.0

!$ACC DATA PRESENT(arr) COPY(sum)
!$ACC PARALLEL LOOP REDUCTION(+ : sum)
  ! { dg-bogus {'sum\.[0-9]+' is used uninitialized} TODO { xfail *-*-* } .-1 }
  !   { dg-note {'sum\.[0-9]+' was declared here} {} { target *-*-* } .-2 }
  DO k=y_min,y_max
    DO j=x_min,x_max
      sum=sum*arr(j,k)
    ENDDO
  ENDDO
!$ACC END PARALLEL LOOP
!$ACC END DATA

END SUBROUTINE reduction_kernel

END MODULE reduction_test

program main
    use reduction_test

    integer :: x_min,x_max,y_min,y_max
    real(kind=8), dimension(1:10,1:10) :: arr
    real(kind=8) :: sum

    x_min = 5
    x_max = 6
    y_min = 5
    y_max = 6

    arr(:,:) = 1.0

    sum = 1.0

    !$acc data copy(arr)

    call field_summary_kernel(x_min,x_max,y_min,y_max,arr,sum)

    !$acc end data

end program