Re: [Patch, fortran] PR67171 - [6 regression] sourced allocation

[Andre Vehreschild <vehre at gmx dot de>]

Hi Paul,

I had a look at your patch, especially at the allocate() specific part
and have nothing serious to complain about. I would love to see more
comments to help beginners find there way in the code, but that's a
thing I will never get. :-)

Therefore, from my perspective ok for trunk and thanks for the patch.

Regards,
	Andre

On Sat, 24 Oct 2015 15:08:30 +0200
Paul Richard Thomas <paul.richard.thomas@gmail.com> wrote:

> Dear All,
> 
> This patch does four things:
> (i) On deallocating class components, the vptr is set to point to the
> vtable of the declared type;
> (ii) When digging out the last class reference, a NULL is returned if
> the allocatable component is to the right of a part reference with
> non-zero rank, so that the resulting ICE is removed. The previous
> modification takes care of these cases for gfc_reset_vptr and
> gfc_reset_len;
> (iii) gfc_reset_vptr has been simplified by the use of
> gfc_get_vptr_from_expr; and
> (iv) All variable expressions for the source are passed to
> gfc_trans-assignment, so that array sections work correctly.
> 
> I see that Andre has already reserved the testcase
> allocate_with_source_10, for the pending patch that I undertook to
> review, so I will change this to #12 on submission
> 
> OK for trunk?
> 
> Cheers
> 
> Paul
> 
> 2015-01-24  Paul Thomas  <pault@gcc.gnu.org>
> 
>     PR fortran/67171
>     * trans-array.c (structure_alloc_comps): On deallocation of
>     class components, reset the vptr to the declared type vtable
>     and reset the _len field of unlimited polymorphic components.
>     *trans-expr.c (gfc_find_and_cut_at_last_class_ref): Bail out on
>     allocatable component references to the right of part reference
>     with non-zero rank and return NULL.
>     (gfc_reset_vptr): Simplify this function by using the function
>     gfc_get_vptr_from_expr. Return if the vptr is NULL_TREE.
>     (gfc_reset_len): If gfc_find_and_cut_at_last_class_ref returns
>     NULL return.
>     * trans-stmt.c (gfc_trans_allocate): Rely on the use of
>     gfc_trans_assignment if expr3 is a variable expression since
>     this deals correctly with array sections.
> 
> 2015-01-24  Paul Thomas  <pault@gcc.gnu.org>
> 
>     PR fortran/67171
>     * gfortran.dg/allocate_with_source_10.f03: New test


-- 
Andre Vehreschild * Email: vehre ad gmx dot de