[PATCH] D147378: [LV] Replace symbolic stride with const in LV

[Peixin Qiao via Phabricator via llvm-commits]

peixin created this revision.
peixin added reviewers: fhahn, Ayal, david-arm, reames, wwei.
peixin added projects: All, LLVM.
Herald added subscribers: StephenFan, rogfer01, javed.absar, hiraditya.
peixin requested review of this revision.
Herald added subscribers: llvm-commits, pcwang-thead, vkmr.

The SCEV checks can replace the symbolic strides with const values. The 
replace in vector region depends on GVN pass, but it is run before LV
pass, so we need to replace it in LV pass.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147378

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/lib/Transforms/Vectorize/VPlan.cpp
  llvm/lib/Transforms/Vectorize/VPlan.h
  llvm/test/Transforms/LoopVectorize/runtime-check-needed-but-empty.ll
  llvm/test/Transforms/LoopVectorize/version-mem-access.ll

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