[PATCH] D66004: [WIP][X86][SSE] SimplifyDemandedVectorEltsForTargetNode - add general shuffle combining support

[Dávid Bolvanský via Phabricator via llvm-commits]

xbolva00 added a comment.

They improved f1 and f2 cases to save one instruction wrt LLVM’s codegen

https://gcc.gnu.org/ml/gcc-patches/2019-08/msg01952.html


Repository:
  rL LLVM

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  https://reviews.llvm.org/D66004/new/

https://reviews.llvm.org/D66004