on 2023/7/21 19:49, Richard Biener wrote:
> On Fri, Jul 21, 2023 at 8:08 AM Kewen.Lin <li...@linux.ibm.com> wrote:
>>
>> Hi,
>>
>> The function vect_update_epilogue_niters which has been
>> removed by r14-2281 has some code taking care of that if
>> there is only one scalar iteration left for epilogue then
>> we won't try to vectorize it any more.
>>
>> Although costing should be able to care about it eventually,
>> I think we still want this special casing without costing
>> enabled, so this patch is to add it back in function
>> vect_analyze_loop_costing, and make it more general for
>> both main and epilogue loops as Richi suggested, it can fix
>> some exposed failures on Power10:
>>
>> - gcc.target/powerpc/p9-vec-length-epil-{1,8}.c
>> - gcc.dg/vect/slp-perm-{1,5,6,7}.c
>>
>> Bootstrapped and regtested on x86_64-redhat-linux,
>> aarch64-linux-gnu, powerpc64-linux-gnu P8/P9 and
>> powerpc64le-linux-gnu P9/P10.
>>
>> Is it ok for trunk?
>
> OK.
>
Thanks Richi, pushed as r14-2736.
BR,
Kewen
