Hi Richard,
There is no reliable way to get this correct at the moment and if there
were good and easy ways to get this working they'd be implemented already.
OK, I then withdraw the patch (and have unassigned myself from the PR).
Best regards
Thomas
On Sun, Jan 8, 2023 at 5:21 PM Thomas Koenig wrote:
>
> Hi Richard,
>
> >> Am 08.01.2023 um 14:31 schrieb Paul Richard Thomas via Fortran
> >> :
> >>
> >> Hi Thomas,
> >>
> >> Following your off-line explanation that the seemingly empty looking
> >> assembly line forces an effective reload from
Hi Richard,
Am 08.01.2023 um 14:31 schrieb Paul Richard Thomas via Fortran
:
Hi Thomas,
Following your off-line explanation that the seemingly empty looking
assembly line forces an effective reload from memory, all is now clear.
It’s not a full fix (for register vars) and it’s ‚superior‘ t
> Am 08.01.2023 um 14:31 schrieb Paul Richard Thomas via Fortran
> :
>
> Hi Thomas,
>
> Following your off-line explanation that the seemingly empty looking
> assembly line forces an effective reload from memory, all is now clear.
It’s not a full fix (for register vars) and it’s ‚superior‘
Hi Thomas,
Following your off-line explanation that the seemingly empty looking
assembly line forces an effective reload from memory, all is now clear.
OK for mainline and for backporting as you see fit.
Thanks for the patch.
Paul
On Sat, 7 Jan 2023 at 15:46, Thomas Koenig via Fortran
wrote:
Hello world,
this patch fixes Fortran's handling of common subexpression elimination
across ieee_set_rouding_mode calls. It does so using a rather big
hammer, by issuing a memory barrier to force reload from memory
(and thus a recomputation).
This is a rather big hammer, so if there are more el
