if ((A == C && B == D) || (A == D && B == C))
return BinaryOperator::CreateXor(A, B);
}
+ // (A ^ B)^(A | B) -> A & B
+ if (match(Op0I, m_Xor(m_Value(A), m_Value(B))) &&
+ match(Op1I, m_Or(m_Value(C), m_Value(D)))) {
+ if ((A == C && B == D) || (A == D && B == C))
+ return BinaryOperator::CreateAnd(A, B);
+ }
+ // (A | B)^(A ^ B) -> A & B
+ if (match(Op0I, m_Or(m_Value(A), m_Value(B))) &&
+ match(Op1I, m_Xor(m_Value(C), m_Value(D)))) {
+ if ((A == C && B == D) || (A == D && B == C))
+ return BinaryOperator::CreateAnd(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))))
match(Op1, m_Not(m_Specific(A))))
return BinaryOperator::CreateOr(A, Builder->CreateNot(B));
+ // (A & ~B) ^ (~A) -> ~(A & B)
+ if (match(Op0, m_And(m_Value(A), m_Not(m_Value(B)))) &&
+ match(Op1, m_Not(m_Specific(A))))
+ return BinaryOperator::CreateNot(Builder->CreateAnd(A, B));
+
// (icmp1 A, B) ^ (icmp2 A, B) --> (icmp3 A, B)
if (ICmpInst *RHS = dyn_cast<ICmpInst>(I.getOperand(1)))
if (ICmpInst *LHS = dyn_cast<ICmpInst>(I.getOperand(0)))