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Re: [PATCH] Fix issues with flag_strict_aliasing changing during compilation (PR c/37106, take {2,3})
On Mon, Nov 3, 2008 at 9:23 PM, Jakub Jelinek <jakub@redhat.com> wrote:
> On Mon, Nov 03, 2008 at 05:01:45PM +0100, Richard Guenther wrote:
>> Hmm. I do not like this too much. For 4.4 I'd like us simply avoid
>> changing flag_strict_aliasing.
>
> Attached are 2 alternatives to do that. One that just silently avoids
> changing flag_strict_aliasing, one that does that silently for
> __optimize__({0,1,2,3}), but errors on __optimize__("fstrict-aliasing")
> when -fno-strict-aliasing is given (or vice versa).
I don't have a strong preference here, so I'd go with the simpler version.
>> For 4.5 we should move flag_strict_aliasing to struct function instead.
>
> How would that change anything?
It doesn't change anything if we query alias sets of types. On the
alias-improvements branch I am trying to put alias sets to the
memory access statements instead. But parts of your patch would
probably still apply.
Richard.
> Jakub
>