[llvm] [InstCombine] Guard noundef for transformation from xor to or disjoint (PR #96905)

[via llvm-commits]

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@@ -4593,8 +4593,12 @@ Instruction *InstCombinerImpl::visitXor(BinaryOperator &I) {
   Value *Op0 = I.getOperand(0), *Op1 = I.getOperand(1);
   Value *M;
   if (match(&I, m_c_Xor(m_c_And(m_Not(m_Value(M)), m_Value()),
-                        m_c_And(m_Deferred(M), m_Value()))))
-    return BinaryOperator::CreateDisjointOr(Op0, Op1);
+                        m_c_And(m_Deferred(M), m_Value())))) {
+    if (isGuaranteedNotToBeUndefOrPoison(M))
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vfdff wrote:

Update, thanks @dtcxzyw 

https://github.com/llvm/llvm-project/pull/96905