[PATCH] D57837: [LV] Prevent interleaving if computeMaxVF returned None.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: Ayal, dcaballe, hsaito, mkuper, rengolin.
Herald added subscribers: rkruppe, hiraditya.
Herald added a project: LLVM.

As discussed in D57382 <https://reviews.llvm.org/D57382>, interleaving should be avoided if computeMaxVF
returns None, same as we currently do for vectorization.

Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6477


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D57837

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Transforms/LoopVectorize/no-interleave-up-front.ll

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