[PATCH] D138883: [SelectionDAG][PowerPC] Memset reuse vector element for tail store

[Ting Wang via Phabricator via llvm-commits]

tingwang updated this revision to Diff 538961.
tingwang retitled this revision from "[PowerPC] find and reuse ConstantSplatVector to combine constant store into extract and store" to "[SelectionDAG][PowerPC] Memset reuse vector element for tail store".
tingwang added a comment.

Return to the initial proposal after exploring different approaches. Since `canCombineStoreAndExtract()` is not beneficial to PPC, created another filter for PPC.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D138883/new/

https://reviews.llvm.org/D138883

Files:
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/lib/Target/PowerPC/PPCISelLowering.cpp
  llvm/lib/Target/PowerPC/PPCISelLowering.h
  llvm/test/CodeGen/PowerPC/memset-tail.ll

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