[PATCH] D148311: [AArch64] Combine add(extract v1i64) into v1i64 add

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: jaykang10, SjoerdMeijer, efriedma, bipmis.
Herald added subscribers: hiraditya, kristof.beyls.
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This helps fix a regression from D148309 <https://reviews.llvm.org/D148309> where a shift + add was no longer combined into a ssra. It looks for add's with v1i64 extract operands and converts them to v1i64 adds. The other operand needs to be something that is easily converted to a v1i64, in this case it currently just checks for a load.


https://reviews.llvm.org/D148311

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/add-extract.ll
  llvm/test/CodeGen/AArch64/arm64-vshift.ll

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