[all-commits] [llvm/llvm-project] 120e96: [AArch64] Don't create ST2 for 64bit store that re...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 120e96850486a5d273b10dbdb4b8877eced942fd
      https://github.com/llvm/llvm-project/commit/120e96850486a5d273b10dbdb4b8877eced942fd
  Author: David Green <david.green at arm.com>
  Date:   2023-02-06 (Mon, 06 Feb 2023)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/vldn_shuffle.ll

  Log Message:
  -----------
  [AArch64] Don't create ST2 for 64bit store that requires an EXT

A 64bit st2 which does not start at element 0 will involved adding extra ext
elements, making the st2 unprofitable. This prevents that case which can lead
to a few less instructions.

Differential Revision: https://reviews.llvm.org/D142966