[PATCH] D105199: [LoopVectorize] Fix scalable vector crash in VPReplicateRecipe::execute

[Florian Hahn via Phabricator via llvm-commits]

fhahn added a comment.

It should be is possible to fix/adjust the recipes in the plan after initial generation, instead of anticipating those cases up front.

This should be easier in this case and I think the existing recipes should cover the functionality required. For example, the widening part for GEPs can be done in D105784 <https://reviews.llvm.org/D105784>. Note that this may also be beneficial for fixed-width vectors, pending a cost check. We should be able to do this not only for GEPs, but any widen able instruction. For the other cases, we only need to compute lane 0 or nothing in the intrinsic case. We can also adjust the recipes in a similar way.


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  https://reviews.llvm.org/D105199/new/

https://reviews.llvm.org/D105199