[PATCH] D70223: [DAGCombine] Split vector load-update-store into single element stores

[qshanz via Phabricator via llvm-commits]

steven.zhang added inline comments.


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Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:6800
+  if (TLI.isCheapToSplitStore(N, UpdatedElementsIdx.size(), DAG) &&
+      TLI.getOperationAction(ISD::STORE, EleVT) == TargetLowering::Legal &&
+      TLI.allowsMemoryAccess(*DAG.getContext(), DAG.getDataLayout(), EleVT)) {
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And it is also benefit to do this folding before the legalization, so that, the illegal store could be combined to legal store later.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D70223/new/

https://reviews.llvm.org/D70223