[PATCH] D144485: [LV][RISCV] Don't interleave scalable vector loops

[Luke Lau via Phabricator via llvm-commits]

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It's less clear with scalable vectors than fixed length vectors that
interleaving exposes more ILP, as scalable vectors can be thought of a
sort of hardware form of interleaving, especially with larger LMULs.
This also addresses the unexpected additional unrolling that occurs when
using larger LMULs in the loop vectorizer.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D144485

Files:
  llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
  llvm/test/Transforms/LoopVectorize/RISCV/divrem.ll
  llvm/test/Transforms/LoopVectorize/RISCV/inloop-reduction.ll
  llvm/test/Transforms/LoopVectorize/RISCV/lmul.ll
  llvm/test/Transforms/LoopVectorize/RISCV/mask-index-type.ll
  llvm/test/Transforms/LoopVectorize/RISCV/riscv-vector-reverse.ll
  llvm/test/Transforms/LoopVectorize/RISCV/scalable-basics.ll
  llvm/test/Transforms/LoopVectorize/RISCV/scalable-reductions.ll

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