[PATCH] D101286: [LAA] Support pointer phis in loop by analyzing each incoming pointer.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: Ayal, anemet, hfinkel, Meinersbur.
Herald added subscribers: javed.absar, hiraditya.
fhahn requested review of this revision.
Herald added a project: LLVM.

SCEV does not look through non-header PHIs inside the loop. Such phis
can be analyzed by adding separate accesses for each incoming pointer
value.

This results in 2 more loops vectorized in SPEC2000/186.crafty and
avoids regressions when sinking instructions before vectorizing.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D101286

Files:
  llvm/lib/Analysis/LoopAccessAnalysis.cpp
  llvm/test/Analysis/LoopAccessAnalysis/pointer-phis.ll
  llvm/test/Transforms/LoopVectorize/vectorize-pointer-phis.ll

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