gcc/testsuite/gfortran.dg/module_nan.f90

   1 ! { dg-do run }
   2 ! { dg-options "-fno-range-check" }
   3 ! { dg-add-options ieee }
   4 ! { dg-skip-if "NaN not supported" { spu-*-* } { "*" } { "" } }
   5 !
   6 ! PR fortran/34318
   7 !
   8 ! Infinity and NaN were not properly written to the .mod file.
   9 !
  10 module nonordinal
  11   implicit none
  12   real, parameter :: inf = 1./0., nan = 0./0., minf = -1./0.0
  13 end module nonordinal
  14
  15 program a
  16   use nonordinal
  17   implicit none
  18   character(len=20) :: str
  19   if (log(abs(inf))  < huge(inf)) call abort()
  20   if (log(abs(minf)) < huge(inf)) call abort()
  21   if (.not. isnan(nan)) call abort()
  22   write(str,*) inf
  23   if (adjustl(str) /= "+Infinity") call abort()
  24   write(str,*) minf
  25   if (adjustl(str) /= "-Infinity") call abort()
  26   write(str,*) nan
  27   if (adjustl(str) /= "NaN") call abort()
  28 end program a
  29
  30 ! { dg-final { cleanup-modules "nonordinal" } }