[all-commits] [llvm/llvm-project] 15d8b3: [LLVM][ISel][AArch64 Remove AArch64ISD::FCM##z nod...

Paul Walker via All-commits all-commits at lists.llvm.org
Wed Apr 23 03:30:04 PDT 2025


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 15d8b3cae9debc2bd7d27ca92ff599ba9fb30da5
      https://github.com/llvm/llvm-project/commit/15d8b3cae9debc2bd7d27ca92ff599ba9fb30da5
  Author: Paul Walker <paul.walker at arm.com>
  Date:   2025-04-23 (Wed, 23 Apr 2025)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/Utils.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.h
    M llvm/lib/Target/AArch64/AArch64InstrFormats.td
    M llvm/lib/Target/AArch64/AArch64InstrGISel.td
    M llvm/lib/Target/AArch64/AArch64InstrInfo.td
    M llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerLowering.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/lower-neon-vector-fcmp.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/select-neon-vector-fcmp.mir
    M llvm/test/CodeGen/AArch64/arm64-zip.ll
    M llvm/test/CodeGen/AArch64/select_cc.ll

  Log Message:
  -----------
  [LLVM][ISel][AArch64 Remove AArch64ISD::FCM##z nodes. (#135817)

We can easily select compare-to-zero instructions without dedicated
nodes. The test changes show opportunities that were previous missed
because of the redundant complexity.



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