[Bug tree-optimization/67326] [5/6 Regression] -ftree-loop-if-convert-stores does not vectorize conditional assignment (anymore)

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67326

--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 16 Nov 2015, jakub at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67326
> 
> Jakub Jelinek <jakub at gcc dot gnu.org> changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |jakub at gcc dot gnu.org
> 
> --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Yeah, we could perhaps look at the other DRs and figure out that because v3[i]
> has the same index as v2[i] or v1[i], those are accessed unconditionally and v3
> has at least as many elements as v1 or v2, v3[i] will not trap if v2[i] will
> not.

That all to avoid relying on SCEV and niter analysis?  Ok, I can see that
it might catch some more cases that way.