[all-commits] [llvm/llvm-project] 2c0a22: [AArch64] Spare N2I roundtrip when splatting float...

Guy David via All-commits all-commits at lists.llvm.org
Fri Jun 6 09:07:35 PDT 2025


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2c0a2261b1250c566624139a21371962ef0e489e
      https://github.com/llvm/llvm-project/commit/2c0a2261b1250c566624139a21371962ef0e489e
  Author: Guy David <49722543+guy-david at users.noreply.github.com>
  Date:   2025-06-06 (Fri, 06 Jun 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 (#141806)

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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