[all-commits] [llvm/llvm-project] 60e2a8: [CodeGen] Disable FP LD1RX instructions generation...

[Igor Kirillov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 60e2a849b0a537f96ca12fb032c4a0e32e07b4ae
      https://github.com/llvm/llvm-project/commit/60e2a849b0a537f96ca12fb032c4a0e32e07b4ae
  Author: Igor Kirillov <igor.kirillov at arm.com>
  Date:   2023-08-09 (Wed, 09 Aug 2023)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64.td
    M llvm/lib/Target/AArch64/AArch64InstrInfo.td
    M llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
    M llvm/lib/Target/AArch64/SVEInstrFormats.td
    M llvm/test/CodeGen/AArch64/sve-ld1r.ll

  Log Message:
  -----------
  [CodeGen] Disable FP LD1RX instructions generation for Neoverse-V1

These instructions show worse performance on Neoverse-V1 compared
to pair of LDR(LDP)/MOV instructions.
This patch adds `no-sve-fp-ld1r` sub-target feature, which is enabled
only on Neoverse-V1.

Fixes https://github.com/llvm/llvm-project/issues/64498

Differential Revision: https://reviews.llvm.org/D157279