gcc/testsuite/algol68/execute/ln-1.a68

# { dg-options "-fstropping=upper" }  #
BEGIN REAL r = 1.0;
      LONG REAL rr = LONG 2.0;
      LONG LONG REAL rrr = LONG LONG 60.0;
      ASSERT (ln (r) = 0.0);
      long ln (rr);
      long long ln (rrr)
END