[all-commits] [llvm/llvm-project] 40f30e: [X86] Prefer sub-of-not for vector inc-of-add (#20...

[Rohan Shenoy via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 40f30ea173b50c130c01d843b612f9563ca63930
      https://github.com/llvm/llvm-project/commit/40f30ea173b50c130c01d843b612f9563ca63930
  Author: Rohan Shenoy <RohanRadhesh.Shenoy at amd.com>
  Date:   2026-09-21 (Mon, 21 Sep 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/lib/Target/X86/X86ISelLowering.h
    M llvm/test/CodeGen/X86/expand-vp-int-intrinsics.ll
    M llvm/test/CodeGen/X86/inc-of-add.ll
    M llvm/test/CodeGen/X86/masked-udiv.ll
    M llvm/test/CodeGen/X86/masked-urem.ll
    M llvm/test/CodeGen/X86/sub-of-not.ll
    M llvm/test/CodeGen/X86/vector-bo-select.ll
    M llvm/test/CodeGen/X86/vector-shift-lut.ll

  Log Message:
  -----------
  [X86] Prefer sub-of-not for vector inc-of-add (#207695)

Avoids lengthening the dependency chain for vector conditional
increments by preferring sub-of-not for vectors. Keeps existing
inc-of-add for scalars.

Fixes #167441



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