gcc/testsuite/gfortran.dg/trim_optimize_4.f90

   1 ! { dg-do run }
   2 ! PR 47065 - make sure that trim optimization does not lead to
   3 ! wrong-code with aliasing.
   4 ! Test case provided by Tobias Burnus.
   5 program main
   6   character(len=12) :: str
   7   str = '1234567890'
   8   call sub(trim(str), str)
   9   ! Should print '12345       '
  10   if (str /= '12345       ') STOP 1
  11   call two(trim(str))
  12   if (str /= '123         ') STOP 2
  13 contains
  14   subroutine sub(a,b)
  15     character(len=*), intent(in) :: a
  16     character(len=*), intent(out) :: b
  17     b = ''
  18     b = a(1:5)
  19   end subroutine sub
  20   subroutine two(a)
  21     character(len=*), intent(in) :: a
  22     str = ''
  23     str(1:3) = a(1:3)
  24   end subroutine two
  25 end program main