gcc/testsuite/gfortran.dg/forall_13.f90

   1 ! { dg-do run }
   2 ! Tests the fix for PR33686, in which dependencies were not
   3 ! correctly handled for the assignments below.
   4 !
   5 ! Contributed by Dick Hendrickson on comp.lang.fortran,
   6 ! " Most elegant syntax for inverting a permutation?" 20071006
   7 !
   8   integer :: p(4) = (/2,4,1,3/)
   9   forall (i = 1:4) p(p(i)) = i                ! This was the original
  10   if (any (p .ne. (/3,1,4,2/))) call abort ()
  11
  12   forall (i = 1:4) p(5 - p(i)) = p(5 - i)     ! This is a more complicated version
  13   if (any (p .ne. (/1,2,3,4/))) call abort ()
  14 end