From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-306468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 29204 invoked by alias); 22 Jan 2010 20:43:16 -0000
Received: (qmail 29163 invoked by uid 48); 22 Jan 2010 20:43:04 -0000
Date: Fri, 22 Jan 2010 20:43:00 -0000
Message-ID: <20100122204304.29162.qmail@sourceware.org>
X-Bugzilla-Reason: CC
References: <bug-42809-6318@http.gcc.gnu.org/bugzilla/>
Subject: [Bug fortran/42809] Too much noise with -Wconversion
In-Reply-To: <bug-42809-6318@http.gcc.gnu.org/bugzilla/>
Reply-To: gcc-bugzilla@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org
From: "anlauf at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2010-01/txt/msg02775.txt.bz2



------- Comment #5 from anlauf at gmx dot de  2010-01-22 20:43 -------
There is also a lot of noise when a derived type with default
initialization is instantiated.  Moreover, the warnings point
to an unexpected locus.  Consider:

module bla
  implicit none
  integer, parameter :: i1 = 1, i2 = 2
  type t_datum
     integer(i1) :: state  = 0
     integer(i2) :: flags  = 0
  end type t_datum
  type t_x
    type(t_datum) :: a
    type(t_datum) :: b
  end type t_x
contains
  subroutine dummy
  end subroutine dummy
end module bla
!------------------------------------------------
module foo
  use bla, only: t_x,   &! Derived type
                 dummy   ! Some unused subroutine
  implicit none
contains
  subroutine work
    type (t_x)  :: x
  end subroutine work
end module foo


This gives:

gfcbug101.f90:19.49:

                 dummy   ! Some unused subroutine
                                                 1
Warning: Conversion from INTEGER(4) to INTEGER(1) at (1)
gfcbug101.f90:19.49:

                 dummy   ! Some unused subroutine
                                                 1
Warning: Conversion from INTEGER(4) to INTEGER(2) at (1)
gfcbug101.f90:19.49:

                 dummy   ! Some unused subroutine
                                                 1
Warning: Conversion from INTEGER(4) to INTEGER(1) at (1)
gfcbug101.f90:19.49:

                 dummy   ! Some unused subroutine
                                                 1
Warning: Conversion from INTEGER(4) to INTEGER(2) at (1)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42809