[PATCH] D143371: [DAG][AArch64][ARM] Recognize hadd from wrapping flags.

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: RKSimon, spatel, SjoerdMeijer, jaykang10.
Herald added subscribers: StephenFan, hiraditya, kristof.beyls.
Herald added a project: All.
dmgreen requested review of this revision.
Herald added a project: LLVM.

This slightly extends the creation of hadd nodes to allow them to be generated with the original type size if wrapping flags allow.
https://alive2.llvm.org/ce/z/bPjakD
https://alive2.llvm.org/ce/z/fa_gzb


https://reviews.llvm.org/D143371

Files:
  llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
  llvm/test/CodeGen/AArch64/arm64-vhadd.ll
  llvm/test/CodeGen/AArch64/sve2-hadd.ll
  llvm/test/CodeGen/Thumb2/mve-vhadd.ll

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