Florian Hahn b3e8ace198 Recommit "[VPlan] Introduce recipe to build scalar steps." ...

This reverts the revert commit ff93260bf6.

The underlying issue causing the PPC bot failures has been fixed in
cbaac14734 and a corresponding test case has been added in
ad2cad1c52.

Original message:

    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

2022-02-28 14:12:20 +00:00

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