gcc/testsuite/gfortran.dg/int_range_io_1.f90

   1 ! { dg-do run }
   2 ! { dg-options "-fno-range-check" }
   3 ! PR 52428 Read IO of integers near the end of range. Note that we
   4 ! support the two's complement representation even though the Fortran
   5 ! numerical model has a symmetric range.  (The -fno-range-check option
   6 ! is needed to allow the -2147483648 literal.)
   7 program int_range
   8   implicit none
   9   character(25) :: inputline = "-2147483648"
  10   integer(4) ::  test
  11   integer :: st
  12
  13   read(inputline,100) test
  14 100 format(1i11)
  15   if (test /= -2147483648) STOP 1
  16   inputline(1:1) = " "
  17   read(inputline, 100, iostat=st) test
  18   if (st == 0) STOP 2
  19   inputline(11:11) = "7"
  20   read(inputline, 100) test
  21   if (test /= 2147483647) STOP 3
  22
  23   ! Same as above but with list-formatted IO
  24   inputline = "-2147483648"
  25   read(inputline, *) test
  26   if (test /= -2147483648) STOP 4
  27   inputline(1:1) = " "
  28   read(inputline, *, iostat=st) test
  29   if (st == 0) STOP 5
  30   inputline(11:11) = "7"
  31   read(inputline, *) test
  32   if (test /= 2147483647) STOP 6
  33
  34 end program int_range