[all-commits] [llvm/llvm-project] 602f43: [AArch64] Add patterns for constructive splice. (#...

[Sander de Smalen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 602f43686c45017e3140789f8d574d2c344b4d71
      https://github.com/llvm/llvm-project/commit/602f43686c45017e3140789f8d574d2c344b4d71
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2024-10-30 (Wed, 30 Oct 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
    M llvm/lib/Target/AArch64/SVEInstrFormats.td
    M llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-concat.ll
    M llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-fcopysign.ll
    M llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-int-div.ll
    M llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-int-rem.ll
    M llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-ptest.ll
    M llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-trunc-stores.ll
    M llvm/test/CodeGen/AArch64/sve-streaming-mode-fixed-length-trunc.ll

  Log Message:
  -----------
  [AArch64] Add patterns for constructive splice. (#113912)

SVE2 adds the constructive splice instruction, which takes a tuple.
Even though the register allocator must ensure that the tuple uses
consecutive registers for the tuple, it's likely to be more efficient
than using the destructive splice instruction when the first operand
is reused.



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