[PATCH C/C++/middle-end] move Wunused-parameter to the FEs

[Manuel LÃpez-IbÃÃez <lopezibanez at gmail dot com>]

Wunused-parameter warnings are given from cgraph::finalize_function,
which is the middle-end. This is an oddity compared to other
-Wunused-* warnings. Moreover, Fortran has its own definition of
-Wunused-parameter that conflicts with the middle-end definition.

This patch moves the middle-end part of Wunused-parameter to the C/C++
FEs. I'm not sure if other FEs expected this warning to work. If so,
they do not seem to test for it. Ada, for example, explicitly disables
it.

This also fixes [fortran/66605] -Wunused-parameter causes internal
compiler error with gfortran 5.1.0.

Bootstrapped & regression tested on x86_64-linux-gnu with languages
c,c++,objc,fortran,ada,obj-c++

OK?


gcc/ChangeLog:

2015-06-28  Manuel LÃpez-IbÃÃez  <manu@gcc.gnu.org>

    PR fortran/66605
    * cgraphunit.c (cgraph_node::finalize_function): Do not call
    do_warn_unused_parameter.
    * function.c (do_warn_unused_parameter): Move from here.
    * function.h (do_warn_unused_parameter): Do not declare.

gcc/c-family/ChangeLog:

2015-06-28  Manuel LÃpez-IbÃÃez  <manu@gcc.gnu.org>

    PR fortran/66605
   * c-common.c (do_warn_unused_parameter): Move here.
    * c-common.h (do_warn_unused_parameter): Declare.

gcc/ada/ChangeLog:

2015-06-28  Manuel LÃpez-IbÃÃez  <manu@gcc.gnu.org>

    PR fortran/66605
   * gcc-interface/misc.c (gnat_post_options): No need to disable
    warn_unused_parameter anymore.

gcc/cp/ChangeLog:

2015-06-28  Manuel LÃpez-IbÃÃez  <manu@gcc.gnu.org>

    PR fortran/66605
   * decl.c (finish_function): Call do_warn_unused_parameter.

gcc/testsuite/ChangeLog:

2015-06-28  Manuel LÃpez-IbÃÃez  <manu@gcc.gnu.org>

    PR fortran/66605
   * gfortran.dg/wunused-parameter.f90: New test.

gcc/c/ChangeLog:

2015-06-28  Manuel LÃpez-IbÃÃez  <manu@gcc.gnu.org>

    PR fortran/66605
   * c-decl.c (finish_function): Call do_warn_unused_parameter.

Attachment: fix-pr66605.diff
Description: Text document