[PATCH] D21903: [LV] Refactor integer induction widening (NFC)

[Matthew Simpson via llvm-commits]

mssimpso created this revision.
mssimpso added a reviewer: anemet.
mssimpso added subscribers: llvm-commits, mcrosier.
Herald added a subscriber: mzolotukhin.

This patch also removes the SCEV variants of getStepVector() since they have no uses after the refactoring. This change was suggested in the review of D21620.

http://reviews.llvm.org/D21903

Files:
  lib/Transforms/Vectorize/LoopVectorize.cpp

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