[PATCH] D75512: [LoopVectorizer][ARM] Add preferInloopReduction reduction.

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
Herald added subscribers: llvm-commits, rogfer01, bollu, hiraditya, kristof.beyls.
Herald added a reviewer: rengolin.
Herald added a project: LLVM.
dmgreen added a parent revision: D75069: [LoopVectorizer] Inloop vector reductions.

This allows the backend to tell the vectorizer to produce inloop reductions through a TTI hook.

It is one possible way to go if we do not attempt to cost reductions against one another using VPlan cost modelling. Taken out of D75069 <https://reviews.llvm.org/D75069>.


https://reviews.llvm.org/D75512

Files:
  llvm/include/llvm/Analysis/TargetTransformInfo.h
  llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
  llvm/lib/Analysis/TargetTransformInfo.cpp
  llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
  llvm/lib/Target/ARM/ARMTargetTransformInfo.h
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Transforms/LoopVectorize/ARM/mve-reductions.ll

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