From: Harald Anlauf <anlauf@gmx.de>
To: Thomas Koenig <tkoenig@netcologne.de>,
Mikael Morin <morin-mikael@orange.fr>,
Richard Biener <richard.guenther@gmail.com>
Cc: Mikael Morin <mikael@gcc.gnu.org>,
gcc-patches@gcc.gnu.org, fortran@gcc.gnu.org
Subject: Re: [PATCH 09/10] fortran: Support clobbering of variable subreferences [PR88364]
Date: Sun, 18 Sep 2022 20:32:09 +0200 [thread overview]
Message-ID: <3ef8c5c4-35a1-fa60-2a2d-a7bb3fbd35fc@gmx.de> (raw)
In-Reply-To: <bb06f8a5-2ff8-ad1d-1f57-dc1255acffbd@netcologne.de>
On 18.09.22 12:23, Thomas Koenig via Gcc-patches wrote:
>
> On 18.09.22 11:10, Mikael Morin wrote:
>> It is unfortunate as there is some desirable behavior within reach here.
>
> I think some of the desired behavior can still be salvaged. For
> example, for
>
> subroutine foo(a,n)
> integer :: n
> integer, dimension(n), intent(in) :: n
integer, dimension(n), intent(out) :: a ! ?
> ...
>
> subroutine bar(a)
> integer, intent(out) :: a
>
> ...
>
> integer :: a(3)
>
> call foo(a,3)
> call foo(a(1),3)
>
> clobbers for the whole array can still be generated, but not for
>
> call foo(a(2),2)
>
> so one would have to look at the lower bound.
>
> For this case, it would be helpful to clobber a range a(2:), but that
> is a wishlist item for the future ;-)
>
> What is unsafe, currently, is
>
> call bar(a(1))
We'll need a good coverage by testcases for the different handling
required for assumed shape / assumed size / explicit size dummies
to avoid new regressions. Assumed shape will be on the easy side,
while assumed size likely needs to be excluded for clobbering.
Harald
next prev parent reply other threads:[~2022-09-18 18:32 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-16 20:24 [PATCH 00/10] fortran: clobber fixes [PR41453] Mikael Morin
2022-09-16 20:24 ` [PATCH 01/10] fortran: Move the clobber generation code Mikael Morin
2022-09-16 20:24 ` [PATCH 02/10] fortran: Fix invalid function decl clobber ICE [PR105012] Mikael Morin
2022-09-16 20:24 ` [PATCH 03/10] fortran: Move clobbers after evaluation of all arguments [PR106817] Mikael Morin
2022-09-16 20:24 ` [PATCH 04/10] fortran: Support clobbering with implicit interfaces [PR105012] Mikael Morin
2022-09-16 20:24 ` [PATCH 05/10] fortran: Support clobbering of reference variables [PR41453] Mikael Morin
2022-09-16 20:24 ` [PATCH 06/10] fortran: Support clobbering of SAVE variables [PR87395] Mikael Morin
2022-09-16 20:24 ` [PATCH 07/10] fortran: Support clobbering of ASSOCIATE variables [PR87397] Mikael Morin
2022-09-16 20:24 ` [PATCH 08/10] fortran: Support clobbering of allocatables and pointers [PR41453] Mikael Morin
2022-09-16 20:24 ` [PATCH 09/10] fortran: Support clobbering of variable subreferences [PR88364] Mikael Morin
2022-09-17 17:03 ` Thomas Koenig
2022-09-17 19:33 ` Mikael Morin
2022-09-17 19:49 ` Bernhard Reutner-Fischer
2022-09-17 19:50 ` Mikael Morin
2022-09-17 21:24 ` Bernhard Reutner-Fischer
2022-09-18 6:12 ` Richard Biener
2022-09-18 9:10 ` Mikael Morin
2022-09-18 10:23 ` Thomas Koenig
2022-09-18 18:32 ` Harald Anlauf [this message]
2022-09-18 20:55 ` Mikael Morin
2022-09-19 7:11 ` Mikael Morin
2022-09-19 19:46 ` Harald Anlauf
2022-09-19 20:50 ` Mikael Morin
2022-09-20 6:54 ` Thomas Koenig
2022-09-20 8:46 ` Mikael Morin
2022-09-20 21:08 ` Harald Anlauf
2022-09-20 21:08 ` Harald Anlauf
2022-09-21 9:57 ` Thomas Koenig
2022-09-21 18:56 ` Mikael Morin
2022-09-21 19:12 ` Harald Anlauf
2022-09-21 19:12 ` Harald Anlauf
2022-09-18 20:43 ` Mikael Morin
2022-09-18 10:48 ` Richard Biener
2022-09-19 7:31 ` Mikael Morin
2022-09-19 7:58 ` Richard Biener
2022-09-16 20:24 ` [PATCH 10/10] fortran: Support clobbering of derived types [PR41453] Mikael Morin
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