[PATCH] D127087: [AArch64] Generate FADDP from shuffled fadd

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: samtebbs, SjoerdMeijer, labrinea, jaykang10.
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As a follow up to D126686 <https://reviews.llvm.org/D126686>, this does the same fold for floating point add and shuffle. In this case it is limited to reassoc either `x[0]+x[1]` or `x[1]+x[0]` for both result[0] and results[1].


https://reviews.llvm.org/D127087

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64InstrInfo.td
  llvm/test/CodeGen/AArch64/faddp-half.ll
  llvm/test/CodeGen/AArch64/faddp.ll

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