[all-commits] [llvm/llvm-project] 87bcbd: [AArch64][SVE] Fix extract_subvector patterns for ...

[sdesmalen-arm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 87bcbd61b5e60ed1f465cc276029be9f667162ba
      https://github.com/llvm/llvm-project/commit/87bcbd61b5e60ed1f465cc276029be9f667162ba
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2021-09-29 (Wed, 29 Sep 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
    M llvm/test/CodeGen/AArch64/sve-extract-scalable-vector.ll

  Log Message:
  -----------
  [AArch64][SVE] Fix extract_subvector patterns for unpacked fp types.

The patterns added in D110163 were incorrect, since it used the wrong
element widths for its shuffles.

Example for nxv2f16 extract_subvector(nxv8f16 %in, 6):
  <a|b|c|d|e|f|g|h>
               ^^^
           extract g and h.

  => UUNPKHI .h -> .s results in:
  <e  |f  |g  |h  >

  => UUNPKHI .s -> .d results in:
  <g      |h      >

Reviewed By: david-arm

Differential Revision: https://reviews.llvm.org/D110523