[PATCH] D31910: [LV] Fix logic to extract correct element in first order recurrences

[Anna Thomas via Phabricator via llvm-commits]

anna updated this revision to Diff 94877.
anna added a comment.

Updated diff to avoid vectorizing first order recurrences when phi used outside the loop
and the phi is not part of the loop terminating condition.
Based on Mathew's comments above, we have a better way to fix this rather than limiting the loop trip
count in the vectorized case.


https://reviews.llvm.org/D31910

Files:
  lib/Transforms/Utils/LoopUtils.cpp
  lib/Transforms/Vectorize/LoopVectorize.cpp
  test/Transforms/LoopVectorize/first-order-recurrence.ll

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