if ((A == C && B == D) || (A == D && B == C))
return BinaryOperator::CreateXor(A, B);
}
+ // (A & B) ^ (A ^ B) -> (A | B)
+ if (match(Op0I, m_And(m_Value(A), m_Value(B))) &&
+ match(Op1I, m_Xor(m_Specific(A), m_Specific(B))))
+ return BinaryOperator::CreateOr(A, B);
+ // (A ^ B) ^ (A & B) -> (A | B)
+ if (match(Op0I, m_Xor(m_Value(A), m_Value(B))) &&
+ match(Op1I, m_And(m_Specific(A), m_Specific(B))))
+ return BinaryOperator::CreateOr(A, B);
}
// (A | B)^(~A) -> (A | ~B)
; CHECK-NEXT: %1 = xor i32 %b, -1
; CHECK-NEXT: %xor = or i32 %a, %1
}
+
+; (A & B) ^ (A ^ B) -> (A | B)
+define i32 @test9(i32 %b, i32 %c) {
+ %and = and i32 %b, %c
+ %xor = xor i32 %b, %c
+ %xor2 = xor i32 %and, %xor
+ ret i32 %xor2
+; CHECK-LABEL: @test9(
+; CHECK-NEXT: %xor2 = or i32 %b, %c
+}
+
+; (A ^ B) ^ (A & B) -> (A | B)
+define i32 @test10(i32 %b, i32 %c) {
+ %xor = xor i32 %b, %c
+ %and = and i32 %b, %c
+ %xor2 = xor i32 %xor, %and
+ ret i32 %xor2
+; CHECK-LABEL: @test10(
+; CHECK-NEXT: %xor2 = or i32 %b, %c
+}