[PATCH] D106494: [AArch64][GlobalISel] Legalize ctpop s128

[Jon Roelofs via Phabricator via llvm-commits]

jroelofs updated this revision to Diff 361810.
jroelofs retitled this revision from "WIP: [AArch64][GlobalISel] Legalize ctpop s128" to "[AArch64][GlobalISel] Legalize ctpop s128".
jroelofs edited the summary of this revision.
jroelofs added a comment.

Rebased.

Also added `zext(add(trunc(ctpop(lo)), trunc(ctpop(hi))))` narrowing of the `add` to improve things for ctpop 256.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D106494/new/

https://reviews.llvm.org/D106494

Files:
  llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
  llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-ctpop.mir
  llvm/test/CodeGen/AArch64/popcount.ll

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