gcc/testsuite/gfortran.dg/chkbits.f90

   1 ! { dg-do run }
   2 ! NOT() was not return the two's complement value as reported by
   3 ! PR fortran/25458.  In checking other bit manipulation intrinsics,
   4 ! IBSET was found to be in error.
   5 program chkbits
   6
   7   implicit none
   8
   9   integer(kind=1) i1
  10   integer(kind=2) i2
  11   integer(kind=4) i4
  12   integer(kind=8) i8
  13
  14   i1 = ibset(2147483647,bit_size(i4)-1)
  15   i2 = ibset(2147483647,bit_size(i4)-1)
  16   i4 = ibset(2147483647,bit_size(i4)-1)
  17   i8 = ibset(2147483647,bit_size(i4)-1)
  18   if (i1 /= -1 .or. i2 /= -1 .or. i4 /= -1 .or. i8 /= -1) call abort
  19
  20   i1 = not(0)
  21   i2 = not(0)
  22   i4 = not(0)
  23   i8 = not(0)
  24   if (i1 /= -1 .or. i2 /= -1 .or. i4 /= -1 .or. i8 /= -1) call abort
  25
  26 end program chkbits