[all-commits] [llvm/llvm-project] af2d74: [InstCombine] Treat `lshr nneg` as `ashr` in `getB...

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: af2d740d2d9f3ff7ce9c038c26134c921f0662ae
      https://github.com/llvm/llvm-project/commit/af2d740d2d9f3ff7ce9c038c26134c921f0662ae
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2023-12-15 (Fri, 15 Dec 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
    M llvm/test/Transforms/InstCombine/xor.ll

  Log Message:
  -----------
  [InstCombine] Treat `lshr nneg` as `ashr` in `getBinOpsForFactorization` (#75521)

This patch reinterprets `lshr nneg C, X` as `ashr nneg C, X` to allow
more factorization opportunities.
Fixes #70582.