This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: IVOPT improvement patch


See new revision -- moved the iv pos adjustment to be just before
address use rewrite -- this eliminates the need to 1) do extra valid
mem_ref check; and 2) to do the mem_ref fix up -- i.e., your second
suggestion.

Retested (together with patch-1).

Regarding patch-3 (sinking) -- neither store sink nor scev_cprop are
good for it -- store sinking pass does not al sinking out of loop
(different loop nest) -- any naive enhancement may result in increased
register pressure. scev_cprop does not handle multiple exit loops.  I
will hold this patch for now.

Any feedback on patch-4?

Thanks,

David

On Wed, Jun 2, 2010 at 1:56 PM, Zdenek Dvorak <rakdver@kam.mff.cuni.cz> wrote:
> Hi,
>
>> > 1) you should check whether the new value of the offset is allowed for the
>> > ? current architecture.
>>
>> What query should be used? It is not checked in maybe_fold_tmr call
>> nor tmr creation in ivopts.
>
> valid_mem_ref_p
>
> Zdenek
>

Attachment: ivopts_latest_part4.p.r2
Description: Binary data


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]