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[VPlan] Perform interleaving as VPlan-to-VPlan transform. #94339

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[VPlan] Perform interleaving as VPlan-to-VPlan transform. #94339

wants to merge 1 commit into from

Commits on Jun 13, 2024

  1. [VPlan] Implement interleaving as VPlan-to-VPlan transform. 

    This patch implements explicit interleaving as VPlan transform, thus
simplifying VPTransform state (no need to store unrolled parts) as well
as recipe execution (no need to generate code for multiple parts in a
each recipe). It also allos for more general optimziations (e.g. avoid
generating code for recipes that are uniform-across parts).

In the initial implementation, a number of recipes still take the
unrolled part as additional, optional argument, if their execution
depends on the unrolled part.

The computation for start/step values for scalable inductions changed
slightly. Previously the step would be computed as scalar and then
splatted, now vscale gets splatted and multiplied by the step in a
vector mul.

Depends on llvm#93396.
    @fhahn
    fhahn committed Jun 13, 2024
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