gcc/testsuite/gfortran.fortran-torture/execute/stack_varsize.f90

   1 ! Program to test the stack variable size limit.
   2 program stack
   3    call sub1
   4    call sub2 (1)
   5 contains
   6
   7    ! Local variables larger than 32768 in byte size shall be placed in static
   8    ! storage area, while others be put on stack by default.
   9    subroutine sub1
  10       real a, b(32768/4), c(32768/4+1)
  11       integer m, n(1024,4), k(1024,1024)
  12       a = 10.0
  13       b = 20.0
  14       c = 30.0
  15       m = 10
  16       n = 20
  17       k = 30
  18       if ((a .ne. 10.0).or.(b(1) .ne. 20.0).or.(c(1) .ne. 30.0)) STOP 1
  19       if ((m .ne. 10).or.(n(256,4) .ne. 20).or.(k(1,1024) .ne. 30)) STOP 2
  20    end subroutine
  21
  22    ! Local variables defined in recursive subroutine are always put on stack.
  23    recursive subroutine sub2 (n)
  24       real a (32769)
  25       a (1) = 42
  26       if (n .ge. 1) call sub2 (n-1)
  27       if (a(1) .ne. 42) STOP 3
  28       a (1) = 0
  29    end subroutine
  30 end