[Patch PR 44576]: Reduce the computation cost in compute_miss_rate for prefetching loop arrays

[Richard Guenther]

On Wed, Jun 30, 2010 at 7:34 PM, Fang, Changpeng <Changpeng.Fang@amd.com> wrote:
>> FOR_EACH_LOOP (li, loop, LI_ONLY_INNERMOST)
>
>>does that make a difference?
>
> This doesn't help, because "compute_all_dependences" was called the same number of time
> as before.
>
> (BTW, should we limit prefetching only to the innermost one?)
>
> In this test case, there are 6 large loops, where each loop has 729 memory reference.
> It takes 4~5 seconds to "compute_all_dependence" for one such loop.

It shouldn't take that long.  Can you gather a more detailed profile?

>
>> The patch passed Bootstrapping and regression tests.
>>
>> Is this patch OK to commit?
>
>>Ok.
>
>  Thank you.
>
> Changpeng
>