[all-commits] [llvm/llvm-project] e158ad: [InstCombine] Canonicalize `icmp eq/ne (A ^ C), B`...

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e158add121dd20cec3a363cb4e6e66b6072479d7
      https://github.com/llvm/llvm-project/commit/e158add121dd20cec3a363cb4e6e66b6072479d7
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2023-09-26 (Tue, 26 Sep 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
    M llvm/test/Transforms/InstCombine/icmp-equality-xor.ll
    M llvm/test/Transforms/InstCombine/icmp-or.ll

  Log Message:
  -----------
  [InstCombine] Canonicalize `icmp eq/ne (A ^ C), B` to `icmp eq/ne (A ^ B), C` (#67273)

This patch canonicalizes `icmp eq/ne (A ^ Cst), B` to `icmp eq/ne (A ^ B), Cst` since the latter form exposes more optimizations.
Proof: https://alive2.llvm.org/ce/z/9DbhGc
Fixes #65968.