Florian Hahn 49b23f451c
[VPlan] Introduce recipe to build scalar steps.
This patch adds a new VPScalarIVStepsRecipe to handle building scalar
steps.

In the first patch, it only handles the case where there is no vector
induction variable needed.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D115953
2022-02-27 17:32:41 +00:00
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