[PATCH] D82669: [ARM] Generate URHADD from (b - (~a)) >> 1

[Petre Tudor via Phabricator via llvm-commits]

PetreTudor created this revision.
Herald added subscribers: llvm-commits, danielkiss, hiraditya, kristof.beyls.
Herald added a project: LLVM.
PetreTudor added a reviewer: dmgreen.

Teach LLVM to recognize the above pattern, which is usually a
transformation of (a + b + 1) >> 1, where the operands are unsigned
types.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D82669

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h
  llvm/lib/Target/AArch64/AArch64InstrInfo.td
  llvm/test/CodeGen/AArch64/arm64-vhadd.ll

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