[all-commits] [llvm/llvm-project] c3175c: [InstCombine] Fold `(X & C1) - (X & C2) --> X & (C...

[fengfeng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c3175c50a3cefef05046a2f78afb55028b30eb5a
      https://github.com/llvm/llvm-project/commit/c3175c50a3cefef05046a2f78afb55028b30eb5a
  Author: fengfeng <153487255+fengfeng09 at users.noreply.github.com>
  Date:   2024-12-10 (Tue, 10 Dec 2024)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
    A llvm/test/Transforms/InstCombine/and-sub-combine.ll

  Log Message:
  -----------
  [InstCombine] Fold `(X & C1) - (X & C2) --> X & (C1 ^ C2)` if `(C1 & C2) == C2` (#119316)

if (C1 & C2) == C2 then (X & C1) - (X & C2) --> X & (C1 ^ C2)

Alive2: https://alive2.llvm.org/ce/z/JvQU8w



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