From: Tobias Burnus <burnus@net-b.de>
To: Paul Richard Thomas <paul.richard.thomas@gmail.com>
Cc: "fortran@gcc.gnu.org" <fortran@gcc.gnu.org>,
gcc-patches <gcc-patches@gcc.gnu.org>
Subject: Re: [Patch, fortran] [4.7/4.8 Regression] [OOP] ICE on invalid: gfc_variable_attr(): Bad array reference
Date: Wed, 02 Jan 2013 14:56:00 -0000 [thread overview]
Message-ID: <50E44A88.1050508@net-b.de> (raw)
In-Reply-To: <CAGkQGi+sXPGMabT_-ZGVAgu+LJ6JwMMXvJnLuizB+5CJeVn1dg@mail.gmail.com>
Dear Paul,
Paul Richard Thomas wrote:
> As noted by Janus in comment #2 of the PR, "I think the function
> 'copy_ts_from_selector_to_associate' comes too early (namely during
> parsing). It tries to resolve the target expr, which should rather
> wait until resolution stage!?!"
>
> It turned out that the function of the call to gfc_resolve_expr was to
> fix up the selector array reference type. This has been done
> explicitly in this patch.
>
> Bootstraps and regtests on FC17/x86_64 - OK for trunk and 4.7?
It looks mostly okay; however, you do not handle vector sections
correctly, which leads to an ICE. Without your patch, one gets:
Error: CLASS selector at (1) needs a temporary which is not yet
implemented
With your patch, it fails as one has:
(gdb) p ref->next->u.ar.type
$7 = AR_ELEMENT
(gdb) p ref->next->u.ar.dimen_type
$8 = {DIMEN_VECTOR, 0, 0, 0, 0, 0, 0}
Please fix the DIMEN_VECTOR handling and add a test case for it (e.g.
the one below). Could you also check whether we have a PR for that "not
yet implemented" error?
module gn
type :: ncb
end type ncb
type, public :: tn
class(ncb), allocatable, dimension(:) :: cb
end type tn
contains
integer function name(self)
implicit none
class (tn), intent(in) :: self
select type (component => self%cb([4,7+1]))
end select
end function name
end module gn
I am not quite sure whether the following ICE has the same cause or a
different one, but it also ICEs with your patch applied:
module gn
type :: ncb
end type ncb
type, public :: tn
class(ncb), allocatable :: cb[:]
end type tn
contains
integer function name(self)
implicit none
class (tn), intent(in) :: self
select type (component => self%cb[4])
! ALSO FAILS: "(component => self%cb)"
end select
end function name
end module gn
Tobias
next prev parent reply other threads:[~2013-01-02 14:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-02 14:11 Paul Richard Thomas
2013-01-02 14:56 ` Tobias Burnus [this message]
2013-01-02 21:33 ` Paul Richard Thomas
2013-01-02 22:48 ` Tobias Burnus
2013-01-04 17:46 ` Paul Richard Thomas
2013-01-04 20:54 ` Paul Richard Thomas
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