gcc/testsuite/gfortran.dg/module_nan.f90

   1 ! { dg-do run }
   2 ! { dg-options "-fno-range-check" }
   3 ! { dg-add-options ieee }
   4 !
   5 ! PR fortran/34318
   6 !
   7 ! Infinity and NaN were not properly written to the .mod file.
   8 !
   9 module nonordinal
  10   implicit none
  11   real, parameter :: inf = 1./0., nan = 0./0., minf = -1./0.0
  12 end module nonordinal
  13
  14 program a
  15   use nonordinal
  16   implicit none
  17   character(len=20) :: str
  18   if (log(abs(inf))  < huge(inf)) STOP 1
  19   if (log(abs(minf)) < huge(inf)) STOP 2
  20   if (.not. isnan(nan)) STOP 3
  21   write(str,"(sp,f10.2)") inf
  22   if (adjustl(str) /= "+Infinity") STOP 4
  23   write(str,*) minf
  24   if (adjustl(str) /= "-Infinity") STOP 5
  25   write(str,*) nan
  26   if (adjustl(str) /= "NaN") STOP 6
  27 end program a