gcc-4_9/gcc/testsuite/gfortran.dg/real_compare_1.f90

   1 ! { dg-do compile }
   2 ! { dg-options "-Wcompare-reals" }
   3 program main
   4   real :: a
   5   complex :: c
   6   read (*,*) a
   7   read (*,*) c
   8   if (a .eq. 3.14) print *,"foo" ! { dg-warning "Equality comparison for REAL" }
   9   if (3.14 == a) print *,"foo" ! { dg-warning "Equality comparison for REAL" }
  10   if (a .eq. 3) print *,"foo" ! { dg-warning "Equality comparison for REAL" }
  11   if (3. == a) print *,"foo" ! { dg-warning "Equality comparison for REAL" }
  12   if (a .ne. 4.14) print *,"foo" ! { dg-warning "Inequality comparison for REAL" }
  13   if (4.14 /= a) print *,"foo" ! { dg-warning "Inequality comparison for REAL" }
  14   if (a .ne. 4) print *,"foo" ! { dg-warning "Inequality comparison for REAL" }
  15   if (4 /= a) print *,"foo" ! { dg-warning "Inequality comparison for REAL" }
  16
  17   if (c .eq. (3.14, 2.11)) print *,"foo" ! { dg-warning "Equality comparison for COMPLEX" }
  18   if ((3.14, 2.11) == a) print *,"foo" ! { dg-warning "Equality comparison for COMPLEX" }
  19   if (c .ne. (3.14, 2.11)) print *,"foo" ! { dg-warning "Inequality comparison for COMPLEX" }
  20   if ((3.14, 2.11) /= a) print *,"foo" ! { dg-warning "Inequality comparison for COMPLEX" }
  21 end program main