[PATCH] D121899: [LoopVectorize] Optimise away the icmp when tail-folding for some low trip counts

[David Sherwood via Phabricator via llvm-commits]

david-arm updated this revision to Diff 431302.
david-arm added a comment.

- I've removed the need for a separate TripCount VPValue in the VPlan class because we're always going to need the original scalar trip count, and the value is the same for each Part anyway. Now we just store a copy in the VPTransformState so that the execute() functions can access it.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D121899/new/

https://reviews.llvm.org/D121899

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/lib/Transforms/Vectorize/VPlan.cpp
  llvm/lib/Transforms/Vectorize/VPlan.h
  llvm/test/Transforms/LoopVectorize/AArch64/sve-low-trip-count.ll
  llvm/test/Transforms/LoopVectorize/X86/constant-fold.ll
  llvm/test/Transforms/LoopVectorize/X86/outer_loop_test1_no_explicit_vect_width.ll
  llvm/test/Transforms/LoopVectorize/X86/pr34438.ll
  llvm/test/Transforms/LoopVectorize/X86/pr42674.ll

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