gcc/testsuite/gfortran.dg/pr50769.f90

   1 ! { dg-do compile }
   2 ! { dg-options "-O2 -ftree-tail-merge -fno-delete-null-pointer-checks -fno-guess-branch-probability" }
   3 !
   4 ! based on testsuite/gfortran.dg/alloc_comp_optional_1.f90,
   5 ! which was contributed by David Kinniburgh <davidkinniburgh@yahoo.co.uk>
   6 !
   7 program test_iso
   8   type ivs
   9      character(LEN=1), dimension(:), allocatable :: chars
  10   end type ivs
  11   type(ivs) :: v_str
  12   integer :: i
  13   call foo(v_str, i)
  14   if (v_str%chars(1) .ne. "a") call abort
  15   if (i .ne. 0) call abort
  16   call foo(flag = i)
  17   if (i .ne. 1) call abort
  18 contains
  19   subroutine foo (arg, flag)
  20     type(ivs), optional, intent(out) :: arg
  21     integer :: flag
  22     if (present(arg)) then
  23       arg = ivs([(char(i+96), i = 1,10)])
  24       flag = 0
  25     else
  26       flag = 1
  27     end if
  28   end subroutine
  29 end
  30