gcc/testsuite/gfortran.dg/elemental_subroutine_2.f90

   1 ! { dg-do run }
   2 ! Test the fix for pr22146, where and elemental subroutine with
   3 ! array actual arguments would cause an ICE in gfc_conv_function_call.
   4 ! This test checks that the main uses for elemental subroutines work
   5 ! correctly; namely, as module procedures and as procedures called
   6 ! from elemental functions. The compiler would ICE on the former with
   7 ! the first version of the patch.
   8 !
   9 ! Contributed by Paul Thomas   <pault@gcc.gnu.org>
  10
  11 module type
  12   type itype
  13     integer :: i
  14     character(1) :: ch
  15   end type itype
  16 end module type
  17
  18 module assign
  19   interface assignment (=)
  20     module procedure itype_to_int
  21   end interface
  22 contains
  23   elemental subroutine itype_to_int (i, it)
  24     use type
  25     type(itype), intent(in) :: it
  26     integer, intent(out) :: i
  27     i = it%i
  28   end subroutine itype_to_int
  29
  30   elemental function i_from_itype (it) result (i)
  31     use type
  32     type(itype), intent(in) :: it
  33     integer :: i
  34     i = it
  35   end function i_from_itype
  36
  37 end module assign
  38
  39 program test_assign
  40   use type
  41   use assign
  42   type(itype) :: x(2, 2)
  43   integer :: i(2, 2)
  44
  45 ! Test an elemental subroutine call from an elementary function.
  46   x = reshape ((/(itype (j, "a"), j = 1,4)/), (/2,2/))
  47   forall (j = 1:2, k = 1:2)
  48     i(j, k) = i_from_itype (x (j, k))
  49   end forall
  50   if (any(reshape (i, (/4/)).ne.(/1,2,3,4/))) call abort ()
  51
  52 ! Check the interface assignment (not part of the patch).
  53   x = reshape ((/(itype (j**2, "b"), j = 1,4)/), (/2,2/))
  54   i = x
  55   if (any(reshape (i, (/4/)).ne.(/1,4,9,16/))) call abort ()
  56
  57 ! Use the interface assignment within a forall block.
  58   x = reshape ((/(itype (j**3, "c"), j = 1,4)/), (/2,2/))
  59   forall (j = 1:2, k = 1:2)
  60     i(j, k) = x (j, k)
  61   end forall
  62   if (any(reshape (i, (/4/)).ne.(/1,8,27,64/))) call abort ()
  63
  64 end program test_assign