[patch, fortran] PR 47659 - extend conversion warnings to assignments

[Tobias Burnus]

Thomas Koenig wrote:
> now that I have found a little time, here is an updated version of
> the patch, which incorporates Tobias' suggestions.  Regression-tested.
>
> OK for trunk?

OK. Thanks for the patch!

Tobias

> 2011-08-21  Thomas Koenig <tkoenig@gcc.gnu.org>
>
>         PR fortran/47659
>         * expr.c (gfc_check_assign): Check for type conversions when the
>         right-hand side is a constant REAL/COMPLEX contstant the 
> left-hand
>         side is also REAL/COMPLEX.  Don't warn when a narrowing 
> conversion
>         for REAL does not change the value of the constant.
>
> 2011-08-21  Thomas Koenig <tkoenig@gcc.gnu.org>
>
>         PR fortran/47659
>         * gfortran.dg/warn_conversion_2.f90:  Also warn about conversion
>         of a constant resulting from simplification.
>         * gfortran.dg/warn_conversion_3.f90:  New test.