[PATCH] D53259: [AARCH64] Improve vector popcnt lowering with ADDLP

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: javed.absar, efriedma, t.p.northover, evandro.
Herald added a subscriber: kristof.beyls.

AARCH64 equivalent to https://reviews.llvm.org/D53257 - uses widening pairwise adds on vXi8 CTPOP to support i16/i32/i64 vectors.

This will remove the aarch64 diff from https://reviews.llvm.org/D53258.


Repository:
  rL LLVM

https://reviews.llvm.org/D53259

Files:
  lib/Target/AArch64/AArch64ISelLowering.cpp
  test/CodeGen/AArch64/arm64-vpopcnt.ll

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