[patch, fortran] Function call optimization

[Thomas Koenig]

Hi Mikael,
>> Here is the new version of the patch.  Regression-tested.  OK for trunk?
> OK this time.
>
> Thank you.

Sende          fortran/ChangeLog
Sende          fortran/dependency.c
Sende          fortran/frontend-passes.c
Sende          fortran/gfortran.h
Sende          fortran/invoke.texi
Sende          fortran/lang.opt
Sende          fortran/options.c
Sende          testsuite/ChangeLog
HinzufÃŒgen     testsuite/gfortran.dg/function_optimize_1.f90
HinzufÃŒgen     testsuite/gfortran.dg/function_optimize_2.f90
Ãœbertrage Daten ..........
Revision 171207 ÃŒbertragen.

Thanks for the review!

	Thomas