From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id AE59D3858D33; Mon, 25 Apr 2022 00:57:44 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org AE59D3858D33
From: "xudong.luo@compiler-dev.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/105372] New: The result of the merge function is
 different when it's type of parameters  is the extensions type of derived
 type
Date: Mon, 25 Apr 2022 00:57:44 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 11.3.1
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: xudong.luo@compiler-dev.com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-105372-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Mon, 25 Apr 2022 00:57:44 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105372

            Bug ID: 105372
           Summary: The result of the merge function is different when
                    it's type of parameters  is the extensions type of
                    derived type
           Product: gcc
           Version: 11.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: xudong.luo@compiler-dev.com
  Target Milestone: ---

Whether the mask is a constant or a variable causes inconsistent results of=
 the
merge function when it's type of parameters  is the extensions type of deri=
ved
type.
1.The mask is constant
Program test00
  Type t
    Integer :: c
  End Type
  Type,Extends(t) :: t2
    Integer :: c2
  End Type
  Class(t),Allocatable :: x,y,r
  logical :: ok =3D .true.
  x =3D t2(1,-1)
  y =3D t2(2,-2)
  r =3D merge (x,y,.true.)
  Select Type (z=3D>r)
  Type Is (t)
    print *,z%c
  Type Is (t2)
    print *,z%c,z%c2
  End Select
End Program
2. The mask is variable
Program test01
  Type t
    Integer :: c
  End Type
  Type,Extends(t) :: t2
    Integer :: c2
  End Type
  Class(t),Allocatable :: x,y,r
  logical :: ok =3D .true.
  integer :: i =3D 1
  x =3D t2(1,-1)
  y =3D t2(2,-2)
  r =3D merge (x,y,i =3D=3D 1)
  Select Type (z=3D>r)
  Type Is (t)
    print *,z%c
  Type Is (t2)
    print *,z%c,z%c2
  End Select
End Program=