[all-commits] [llvm/llvm-project] 862315: [AArch64] Spare N2I roundtrip when splatting float...

[Guy David via All-commits]

  Branch: refs/heads/users/guy-david/aarch64-dup-lane-simd
  Home:   https://github.com/llvm/llvm-project
  Commit: 86231542795b4066e3c248fb60ba001fb80b6b97
      https://github.com/llvm/llvm-project/commit/86231542795b4066e3c248fb60ba001fb80b6b97
  Author: Guy David <guyda96 at gmail.com>
  Date:   2025-05-29 (Thu, 29 May 2025)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.h
    M llvm/test/CodeGen/AArch64/arm64-neon-v1i1-setcc.ll
    A llvm/test/CodeGen/AArch64/build-vector-dup-simd.ll

  Log Message:
  -----------
  [AArch64] Spare N2I roundtrip when splatting float comparison

Transform `select_cc t1, t2, -1, 0` for floats into a vector comparison which
generates a mask, which is later on combined with potential vectorized DUPs.



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