[PATCH] D11931: AVX512 : vplzcnt and vpconflict implemantation

Sun Sep 6 04:13:57 PDT 2015

RKSimon added a comment.

In http://reviews.llvm.org/D11931#240672, @igorb wrote:

> In http://reviews.llvm.org/D11931#240619, @RKSimon wrote:
>
> > Have you looked into promoting i8/i16 vector CTLZ to use the dword LZCNT instruction (trunc(sub(lzcnt(zext(x))))?
>
>
> This is a good idea, I will implement it.

Cheers, this should help CTTZ_UNDEF lowering (http://reviews.llvm.org/D12663) as well.

Repository:
  rL LLVM

http://reviews.llvm.org/D11931