[PATCH] D62890: [DAGCombiner] Improve tryStoreMergeOfExtracts by using double sized vector type before type legalized

[Ting Wang via Phabricator via llvm-commits]

tingwang updated this revision to Diff 449219.
tingwang added a comment.

Added cost function for target as suggested. The function on PPC tries to avoid some patterns that lead to TOC accesses.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62890/new/

https://reviews.llvm.org/D62890

Files:
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/lib/Target/PowerPC/PPCISelLowering.cpp
  llvm/lib/Target/PowerPC/PPCISelLowering.h
  llvm/test/CodeGen/PowerPC/extract-and-store.ll

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