[PATCH] D142894: [LoopVectorize] Use overflow-check analysis to improve tail-folding.

[Sander de Smalen via Phabricator via llvm-commits]

sdesmalen updated this revision to Diff 499552.
sdesmalen marked 12 inline comments as done.
sdesmalen added a comment.
Herald added subscribers: luke, frasercrmck, luismarques, apazos, sameer.abuasal, s.egerton, Jim, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, MaskRay, jrtc27, niosHD, sabuasal, simoncook, johnrusso, rbar, asb, arichardson.

- IVUpdateCannotOverflow -> IVUpdateMayOverflow
- Added 'IVUpdateMayOverflow' as operand to getPreferredTailFoldingStyle.
- Runtime check is no longer emitted when tail-folding when we know the check evaluates to false.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D142894/new/

https://reviews.llvm.org/D142894

Files:
  llvm/include/llvm/Analysis/TargetTransformInfo.h
  llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
  llvm/include/llvm/CodeGen/BasicTTIImpl.h
  llvm/lib/Analysis/TargetTransformInfo.cpp
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
  llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
  llvm/lib/Target/ARM/ARMTargetTransformInfo.h
  llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Transforms/LoopVectorize/AArch64/sve-low-trip-count.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-tail-folding-optsize.ll
  llvm/test/Transforms/LoopVectorize/AArch64/sve-tail-folding-overflow-checks.ll
  llvm/test/Transforms/LoopVectorize/RISCV/low-trip-count.ll
  llvm/test/Transforms/LoopVectorize/RISCV/scalable-tailfold.ll
  llvm/test/Transforms/LoopVectorize/RISCV/short-trip-count.ll
  llvm/test/Transforms/LoopVectorize/RISCV/uniform-load-store.ll

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