[patch][RFC] 160-bits bitmap_element

[Steven Bosscher]

On Fri, Aug 17, 2012 at 2:21 PM, Jakub Jelinek <jakub@redhat.com> wrote:
> On Fri, Aug 17, 2012 at 02:16:12PM +0200, Richard Guenther wrote:
>> Or figure out if or why not the vectorizer does catch this (of course we do
>> not enable that with -O2 which we eventually should in a very conservative
>> mode).
>
> It might be helpful if we for the BITMAP_ELEMENT_WORDS == 5 case reordered
> indx field after bits, so that bits array is 64-bit aligned.

That's an excellent suggestion! With that change on top of my 5-int
bitmap patch, I actually get a decent speed-up for this test case (5%,
mostly due to less slow DF).

I'm trying this idea with an otherwise unpatched compiler now.

Ciao!
Steven