On Thu, Nov 21, 2013 at 12:37:01PM +0100, Richard Biener wrote: > Oh, indeed. Bah. That case makes the whole stuff quadratic, too ;)
True, O(nelts^2), but largest nelts we have right now is 64 (V64QImode
on -mavx512f).
> For
>
> typedef int vLARGEsi __attribute__((vector_size(1024*1024)));
The optimization is done only for VECTOR_MODE_P CONSTRUCTORs, if
there is no HW support, the vector will live in memory and the optimization
doesn't make sense.
Jakub
