[all-commits] [llvm/llvm-project] 5156be: [AArch64][ISel] Recover ADDHN from OR comparison m...

[Harry Ramsey via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5156be95e21ca4ac6a0e26ddf1ea349e7199b7d9
      https://github.com/llvm/llvm-project/commit/5156be95e21ca4ac6a0e26ddf1ea349e7199b7d9
  Author: Harry Ramsey <harry.ramsey at arm.com>
  Date:   2026-08-04 (Tue, 04 Aug 2026)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    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/AArch64LegalizerInfo.cpp
    M llvm/test/CodeGen/AArch64/bf16-v4-instructions.ll
    M llvm/test/CodeGen/AArch64/bf16-v8-instructions.ll
    M llvm/test/CodeGen/AArch64/cgp-usubo.ll
    M llvm/test/CodeGen/AArch64/fp16-v4-instructions.ll
    M llvm/test/CodeGen/AArch64/fp16-v8-instructions.ll
    M llvm/test/CodeGen/AArch64/half-precision-signof-no-assert.ll
    M llvm/test/CodeGen/AArch64/intrinsic-vector-match-sve2.ll
    M llvm/test/CodeGen/AArch64/is_fpclass.ll
    A llvm/test/CodeGen/AArch64/neon-addhn.ll
    M llvm/test/CodeGen/AArch64/select-with-and-or.ll

  Log Message:
  -----------
  [AArch64][ISel] Recover ADDHN from OR comparison masks (#210943)

InstCombine converts the high-half addition of vector comparison masks
into an OR. Recognise the resulting trunc(or(setcc, setcc)) DAG and
reconstruct the canonical ADDHN pattern for the supported NEON types.



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