diff options
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineAndOrXor.cpp')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineAndOrXor.cpp | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp b/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp index 8586054..3f4a857 100644 --- a/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp +++ b/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp @@ -1584,6 +1584,19 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) { if ((match(A, m_Not(m_Specific(B))) && match(D, m_Not(m_Specific(C))))) return BinaryOperator::CreateXor(C, B); + + // ((A|B)&1)|(B&-2) -> (A&1) | B + if (match(A, m_Or(m_Value(V1), m_Specific(B))) || + match(A, m_Or(m_Specific(B), m_Value(V1)))) { + Instruction *Ret = FoldOrWithConstants(I, Op1, V1, B, C); + if (Ret) return Ret; + } + // (B&-2)|((A|B)&1) -> (A&1) | B + if (match(B, m_Or(m_Specific(A), m_Value(V1))) || + match(B, m_Or(m_Value(V1), m_Specific(A)))) { + Instruction *Ret = FoldOrWithConstants(I, Op0, A, V1, D); + if (Ret) return Ret; + } } // (X >> Z) | (Y >> Z) -> (X|Y) >> Z for all shifts. @@ -1599,19 +1612,6 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) { } } - // ((A|B)&1)|(B&-2) -> (A&1) | B - if (match(Op0, m_And(m_Or(m_Value(A), m_Value(B)), m_Value(C))) || - match(Op0, m_And(m_Value(C), m_Or(m_Value(A), m_Value(B))))) { - Instruction *Ret = FoldOrWithConstants(I, Op1, A, B, C); - if (Ret) return Ret; - } - // (B&-2)|((A|B)&1) -> (A&1) | B - if (match(Op1, m_And(m_Or(m_Value(A), m_Value(B)), m_Value(C))) || - match(Op1, m_And(m_Value(C), m_Or(m_Value(A), m_Value(B))))) { - Instruction *Ret = FoldOrWithConstants(I, Op0, A, B, C); - if (Ret) return Ret; - } - // (~A | ~B) == (~(A & B)) - De Morgan's Law if (Value *Op0NotVal = dyn_castNotVal(Op0)) if (Value *Op1NotVal = dyn_castNotVal(Op1)) |
