[PATCH] D127219: [SLP]Extend vectorization for scatter vectorize nodes.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev added a comment.

In D127219#3567402 <https://reviews.llvm.org/D127219#3567402>, @vdmitrie wrote:

> LGTM
>
> BTW. One interesting thing I noticed from the test case.
> We might want to special case this:
>
>   i32 *%addr
>   %gep3 = getelementptr inbounds i32, i32* %addr, i32 2
>   %gep5 = getelementptr inbounds i32, i32* %addr, i32 4
>
> ...
>
>   %gep15 = getelementptr inbounds i32, i32* %addr, i32 14
>
> to be vectorized as if VL0 was "getelementptr inbounds i32, i32* %addr, i32 0"
> Now we end up gathering this node.

Yep, thought about something like this, need to improve the analysis and emit an extra shuffle.


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