[PATCH] D79783: [LV] Fallback strategies if tail-folding fails

[Sjoerd Meijer via Phabricator via llvm-commits]

SjoerdMeijer updated this revision to Diff 274035.
SjoerdMeijer retitled this revision from "[LoopVectorize] Fallback to a scalar epilogue when TP fails" to "[LV] Fallback strategies if tail-folding fails".
SjoerdMeijer edited the summary of this revision.
SjoerdMeijer added a comment.
Herald added a subscriber: rkruppe.

Changed `-prefer-predicate-over-epilog` to take a numeric value, corresponding to the preferred predication and fallback strategy.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D79783/new/

https://reviews.llvm.org/D79783

Files:
  llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h
  llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Transforms/LoopVectorize/ARM/prefer-tail-loop-folding.ll
  llvm/test/Transforms/LoopVectorize/ARM/tail-folding-counting-down.ll
  llvm/test/Transforms/LoopVectorize/ARM/tail-folding-scalar-epilogue-fallback.ll
  llvm/test/Transforms/LoopVectorize/ARM/tail-loop-folding.ll
  llvm/test/Transforms/LoopVectorize/X86/tail_loop_folding.ll
  llvm/test/Transforms/LoopVectorize/memdep-fold-tail.ll
  llvm/test/Transforms/LoopVectorize/tail-folding-counting-down.ll
  llvm/test/Transforms/LoopVectorize/use-scalar-epilogue-if-tp-fails.ll

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