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Re: A question about loop ivopt
On Tue, May 22, 2012 at 8:04 PM, Jiangning Liu <jiangning.liu@arm.com> wrote:
> Richard,
>
> But MODES_TIEABLE_P is a macro hook and isn't exposed to TREE level, so I
> would have to modify xxx-protos.h for all back-ends.
As far as I can tell it is exposed already to the middle-end via that
hook in that you should be able to use MODES_TIEABLE_P from
tree-ssa-loop-ivopts.c without modifying anything else.
It looks like the arm and i386 are have both broken xxx-protos.h.
Both rs6000 and mips will work without touching their xxx-protos.h. I
think it is better if you just fix the targets which have a broken
xxx-protos.h.
Thanks,
Andrew Pinski
>
> An alternative way is I define a new function hook. This way I needn't to
> change all back-ends, but support several back-ends required first.
>
> Which solution is usually preferred?
>
> Thanks,
> -Jiangning
>
>>
>> Richard.
>>
>> > Thanks,
>> > -Jiangning
>> >
>> >>
>> >> Richard.
>> >>
>> >>
>> >> > Zdenek
>> >
>> >
>> >
>> >
>
>
>
>