[PATCH] D29956: [LV] Remove constant-step restriction for vector phi creation

[Matthew Simpson via Phabricator via llvm-commits]

mssimpso created this revision.
Herald added a subscriber: mzolotukhin.

We previously only created a vector phi node for an induction variable if its step had a constant integer type. However, the step actually only needs to be loop-invariant. This patch allows a non-constant step if it is loop-invariant and has an integer type.


https://reviews.llvm.org/D29956

Files:
  lib/Transforms/Vectorize/LoopVectorize.cpp
  test/Transforms/LoopVectorize/induction-step.ll

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