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From: "gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/107819] ICE in gfc_check_argument_var_dependency, at
 fortran/dependency.cc:978
Date: Tue, 22 Nov 2022 17:42:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107819

--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---

Works here with explicitly enforced evaluation (a(n)) :


$ cat z3.f90
program p
   integer :: a(4) =3D [-1, -2, -3, -4]
   integer :: n(4) =3D [4, 2, 1, 3]
   call s ((a(n)), a)
   print *, a
contains
   elemental subroutine s (x, y)
      integer, value :: x
      integer, intent(out) :: y
      y =3D x
   end
end


$ cat z8.f90
program p
   implicit none
   integer, parameter :: m =3D 99
   integer :: i
   integer :: a(m) =3D [(-i,i=3D1,m)]
   call s ((a(m:1:-1)), a)
   print '(10i6)', a
contains
   elemental subroutine s (x, y)
      integer, value :: x
      integer, intent(out) :: y
      y =3D x
   end
end


$ cat z9.f90
program p
   implicit none
   integer, parameter :: m =3D 99
   integer :: i
   integer :: a(m) =3D [(-i,i=3D1,m)]
   integer :: n(m) =3D [(i,i=3Dm,1,-1)]
   call s ([a(n)], a)
   print '(10i6)', a
contains
   elemental subroutine s (x, y)
      integer, value :: x
      integer, intent(out) :: y
      y =3D x
   end
end


$ gfortran-13-20221120 z3.f90 && ./a.out
          -4          -2          -1          -3
$=