From e8ad92063afe8ca609275ae4efbc35d7b5bac6e9 Mon Sep 17 00:00:00 2001
From: Antonio Frighetto <me@antoniofrighetto.com>
Date: Wed, 20 Nov 2024 12:03:23 +0100
Subject: [PATCH] Undo `icmp eq/ne (and (add/sub/xor A, P2), P2), 0/P2` fold

---
 llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
index d602a907e72bc..1379d531a67a4 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -5905,6 +5905,7 @@ Instruction *InstCombinerImpl::foldICmpEquality(ICmpInst &I) {
                          m_CombineAnd(m_Value(B), m_Unless(m_ImmConstant())))))
     return new ICmpInst(Pred, Builder.CreateXor(A, B), Cst);
 
+#if 0
   {
     // (icmp eq/ne (and (add/sub/xor X, P2), P2), P2)
     auto m_Matcher =
@@ -5929,6 +5930,7 @@ Instruction *InstCombinerImpl::foldICmpEquality(ICmpInst &I) {
                           *IsZero ? A
                                   : ConstantInt::getNullValue(A->getType()));
   }
+#endif
 
   return nullptr;
 }