diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp index 8cf48dc5b77..a97b5a9ec0b 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp @@ -1425,13 +1425,18 @@ Instruction *InstCombiner::visitAnd(BinaryOperator &I) { return BinaryOperator::CreateAnd(Op1, Builder->CreateNot(C)); // (A | B) & ((~A) ^ B) -> (A & B) - if (match(Op0, m_Or(m_Value(A), m_Value(B))) && - match(Op1, m_Xor(m_Not(m_Specific(A)), m_Specific(B)))) + // (A | B) & (B ^ (~A)) -> (A & B) + // (B | A) & ((~A) ^ B) -> (A & B) + // (B | A) & (B ^ (~A)) -> (A & B) + if (match(Op1, m_c_Xor(m_Not(m_Value(A)), m_Value(B))) && + match(Op0, m_c_Or(m_Specific(A), m_Specific(B)))) return BinaryOperator::CreateAnd(A, B); // ((~A) ^ B) & (A | B) -> (A & B) // ((~A) ^ B) & (B | A) -> (A & B) - if (match(Op0, m_Xor(m_Not(m_Value(A)), m_Value(B))) && + // (B ^ (~A)) & (A | B) -> (A & B) + // (B ^ (~A)) & (B | A) -> (A & B) + if (match(Op0, m_c_Xor(m_Not(m_Value(A)), m_Value(B))) && match(Op1, m_c_Or(m_Specific(A), m_Specific(B)))) return BinaryOperator::CreateAnd(A, B); } |
