[all-commits] [llvm/llvm-project] eac263: [AArch64][SVE] Fold away SETCC if original input w...

[sdesmalen-arm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: eac2638ec169a5d6987ac4fbbcd430bee4489348
      https://github.com/llvm/llvm-project/commit/eac2638ec169a5d6987ac4fbbcd430bee4489348
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2022-02-28 (Mon, 28 Feb 2022)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/sve-cmp-select.ll
    M llvm/test/CodeGen/AArch64/sve-fixed-length-masked-gather.ll
    M llvm/test/CodeGen/AArch64/sve-fixed-length-masked-scatter.ll
    M llvm/test/CodeGen/AArch64/sve-punpklo-combine.ll
    M llvm/test/CodeGen/AArch64/sve-setcc.ll

  Log Message:
  -----------
  [AArch64][SVE] Fold away SETCC if original input was predicate vector.

This adds the following two folds:

Fold 1:
   setcc_merge_zero(
       all_active, extend(nxvNi1 ...), != splat(0))
  -> nxvNi1 ...

Fold 2:
   setcc_merge_zero(
       pred, extend(nxvNi1 ...), != splat(0))
  -> nxvNi1 and(pred, ...)

Reviewed By: david-arm

Differential Revision: https://reviews.llvm.org/D119334