[all-commits] [llvm/llvm-project] ca8082: [InstCombine] Fold ((X + AddC) & Mask) ^ Mask to (...

[hanbeom via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ca8082f3564a3274094aa9eb4c3997142f8df2f9
      https://github.com/llvm/llvm-project/commit/ca8082f3564a3274094aa9eb4c3997142f8df2f9
  Author: hanbeom <kese111 at gmail.com>
  Date:   2026-02-13 (Fri, 13 Feb 2026)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
    M llvm/test/Transforms/InstCombine/and-xor-merge.ll

  Log Message:
  -----------
  [InstCombine] Fold ((X + AddC) & Mask) ^ Mask to (~AddC - X) & Mask (#174278)

This patch optimizes specific pattern.

((X + AddC) & Mask) ^ Mask
-> (~AddC - X) & Mask

Proof: https://alive2.llvm.org/ce/z/XFHfnD
Fixed: https://github.com/llvm/llvm-project/issues/128475



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications