[PATCH] D91984: [CostModel] Add basic implementation of getGatherScatterOpCost.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: dmgreen, RKSimon, spatel, anton-afanasyev.
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Add a basic implementation of getGatherScatterOpCost to BasicTTIImpl.

The implementation estimates the cost of scalarizing the loads/stores,
the cost of packing/extracting the individual lanes and the cost of
only selecting enabled lanes.

This more accurately reflects the current cost on targets like AArch64.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D91984

Files:
  llvm/include/llvm/CodeGen/BasicTTIImpl.h
  llvm/test/Analysis/CostModel/AArch64/mem-op-cost-model.ll
  llvm/test/Transforms/SLPVectorizer/AArch64/gather-cost.ll

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