[PATCH] D113973: [LoopVectorize][CostModel] Choose smaller VFs for in-loop reductions with no loads/stores

[Rosie Sumpter via Phabricator via llvm-commits]

RosieSumpter updated this revision to Diff 393814.
RosieSumpter edited the summary of this revision.
RosieSumpter added a comment.

- Change name of `collectCastsToIgnore` to `collectCastInstrs` and make it a member function of `RecurrenceDescriptor`.
- Modify `collectCastInstrs` to also collect cast instructions where the destination type is the same as the recurrence type.
- Call `collectCastInstrs` from `LoopVectorizationCostModel::getSmallestAndWidestType` in the case of in-loop reductions with no loads/stores to check through casts on recurrence operands when determining the max width.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D113973/new/

https://reviews.llvm.org/D113973

Files:
  llvm/include/llvm/Analysis/IVDescriptors.h
  llvm/lib/Analysis/IVDescriptors.cpp
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Transforms/LoopVectorize/AArch64/smallest-and-widest-types.ll
  llvm/test/Transforms/LoopVectorize/X86/funclet.ll

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