[LLVMdev] [llvm-commits] Vectors of Pointers and Vector-GEP

[David A. Greene]

greened at obbligato.org (David A. Greene) writes:

> "Rotem, Nadav" <nadav.rotem at intel.com> writes:
>
>> Following the discussion in last week’s LLVM developers conference I
>> started working on support for vectors-of-pointers.  Vectors of
>> pointers are needed for supporting scatter/gather operations and are
>> the first step in the direction of supporting predicated
>> architectures.

I just want to make clear that gather/scatter and prediction are
orthogonal concepts.  You don't need one to do the other.  You can use
scatter/gather to vectorize conditional code but it's not the same as
true predication, which is generally much more efficient.

                               -Dave