[all-commits] [llvm/llvm-project] 67d4dd: [AArch64][GlobalISel] Select @llvm.aarch64.neon.ld4.*

[Jessica Paquette via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 67d4dd5c0713681cec2e913d388d44d09928cc33
      https://github.com/llvm/llvm-project/commit/67d4dd5c0713681cec2e913d388d44d09928cc33
  Author: Jessica Paquette <jpaquette at apple.com>
  Date:   2021-08-24 (Tue, 24 Aug 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp
    A llvm/test/CodeGen/AArch64/GlobalISel/select-ld4.mir

  Log Message:
  -----------
  [AArch64][GlobalISel] Select @llvm.aarch64.neon.ld4.*

Reuse the selection code from the ld2 case. This is similar to how SDAG handles
things in AArch64ISelDAGToDAG. (See SelectLoad)

This fell back ~100 times while building clang with GISel enabled for AArch64.

Factoring out the gross subreg copy part ought to make selecting the rest of
this family fairly easy.

Differential Revision: https://reviews.llvm.org/D108600