Bug report gcc 4.8

[Paul Richard Thomas]

Dear Walter,

This and other related PRs have been on my conscience for a long time.
Tobias Burnus and I put in a lot of effort on updating array
descriptors, which would have fixed this. However, we have both run
out of time and availability for such an ambitious project.

Since this is the one remaining non-compliance with the F95 standard,
I will fix this specific problem after my submodule patch is committed
(will be submitted next Saturday).

Thanks for the reminder.

Paul

On 13 June 2015 at 17:22, W Spector <w6ws@earthlink.net> wrote:
> Dear gfortraners,
>
> Has there been any progress on PR 34640 lately?  Today I updated my trunk
> version of gfortran to version 6.0.0 20150613, and it still SEGVs - just
> like it has for years.  Test program below.
>
> It was noted a year or two ago that there was a dev branch that had fixes in
> this area.  Perhaps we should try it instead?
>
> Your advice is appreciated.
>
> Walter
>
> program test_pointers
>
>   implicit none
>   integer :: i, ndata
>   type data_t
>      real :: x
>   end type data_t
>   type(data_t), allocatable, target :: data(:)
>
>   type data_pointer_t
>      real, pointer :: p_x(:)
>   end type data_pointer_t
>   type(data_pointer_t) :: data_pointer
>
>   ndata = 10
>   allocate(data(ndata))
>   forall(i=1:ndata) data(i)%x = float(i)
>
>   data_pointer%p_x => data%x
>   write(*,*) data_pointer%p_x
>
> end program test_pointers
>
>>     From: Walter Spector <w6ws at earthlink dot net>
>>     To: Paul Richard Thomas <paul dot richard dot thomas at gmail dot com>
>>     Cc: gfortran <fortran at gcc dot gnu dot org>
>>     Date: Tue, 10 Jun 2014 07:38:01 -0700 (GMT-07:00)
>>     Subject: Re: Bug report gcc 4.8
>>     Authentication-results: sourceware.org; auth=none
>>     Reply-to: Walter Spector <w6ws at earthlink dot net>
>>
>> Hi Paul,
>>
>> Thank you for the update.  Since this seems to be the only remaining
>> F90/F95 issue
>> in gfortran, it is great to hear that it is finally getting some
>> attention.  As soon
>> as you have something in the trunk, I will be happy to test it and get him
>> up
>> and running with it.
>>
>> Please realize that a lot of us 'users' of gfortran greatly appreciate the
>> gfortran
>> teams efforts!  If I didn't, I wouldn't be reporting the bugs I encounter
>> and advocating
>> for their repair.
>>
>> Walter
>>
>> -----Original Message-----
>>>
>>> From: Paul Richard Thomas <paul.richard.thomas@gmail.com>
>>> Sent: Jun 9, 2014 12:40 PM
>>> To: W Spector <w6ws@earthlink.net>
>>> Cc: gfortran <fortran@gcc.gnu.org>
>>> Subject: Re: Bug report gcc 4.8
>>>
>>> Dear Walter,
>>>
>>> We are putting such effort as we can into the array descriptor reform.
>>> This has to happen for a variety of reasons, including fixing the
>>> likes of Dr Brown's testscase. We have made enormous strides in this
>>> area. Most particularly, the branch devoted to this work, fortran-dev,
>>> now functions like 4.10/4.9 up to a couple of missed vectorization
>>> opportunities in the testsuite. We are aiming to merge 4.10 and this
>>> development branch as soon as possible, so that the API changes occur
>>> early in the release cycle. Just today, we have had some email
>>> exchanges on the mailing list where we summarise what is to be done
>>> and, I hope, we will fix who does what to get to the point of a merge
>>> asap.
>>>
>>> With best regards
>>>
>>> Paul
>>>
>>> On 9 June 2014 17:43, W Spector <w6ws@earthlink.net> wrote:
>>>>
>>>> Unfortunately Dr Browns recent thread got off on a wrong track, but the
>>>> problem remains.  I am still not convinced that this ICE requires a
>>>> change
>>>> to the array descriptors.
>>
>>
>



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