[all-commits] [llvm/llvm-project] 8d5cc0: [AArch64] Optimize two large shifts and a combine ...

[Sopy via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8d5cc015e006616ec818522c966b685bcb4951c2
      https://github.com/llvm/llvm-project/commit/8d5cc015e006616ec818522c966b685bcb4951c2
  Author: Sopy <doimpt at sopy.one>
  Date:   2024-08-02 (Fri, 02 Aug 2024)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/neon-rshrn.ll
    A llvm/test/CodeGen/AArch64/optimize_combine_large_shifts.ll

  Log Message:
  -----------
  [AArch64] Optimize two large shifts and a combine into a single combine and shift (#99480)

Addresses a missing optimization in the AArch64 back-end where two large
shifts followed by a combine operation can be optimized into a single
combine operation followed by a shift.

Closes #59502



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