diff options
Diffstat (limited to 'llvm/lib/Transforms/Scalar')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 76 |
1 files changed, 42 insertions, 34 deletions
diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp index fa0704cc404..94bc3d17133 100644 --- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp @@ -4352,59 +4352,67 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) { } } -#define SELECT_MATCH(Val) \ - m_Select(m_Value(Val), m_ConstantInt(0), m_ConstantInt(-1)) #define GET_SELECT_COND(Val) \ cast<User>(Val)->getOperand(0) +#define SELECT_MATCH(Val) \ + m_Select(m_Value(Val), m_ConstantInt(0), m_ConstantInt(-1)) // (A & (C0?-1:0)) | (B & ~(C0?-1:0)) -> C0 ? A : B, and commuted variants if (match(A, m_Select(m_Value(), m_ConstantInt(-1), m_ConstantInt(0)))) { - if (match(D, m_Not(SELECT_MATCH(A)))) - return SelectInst::Create(GET_SELECT_COND(D), C, B); - if (match(B, m_Not(SELECT_MATCH(A)))) - return SelectInst::Create(GET_SELECT_COND(B), C, D); + Value *Cond = GET_SELECT_COND(A); + if (match(D, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, C, B); + if (match(B, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, C, D); } if (match(B, m_Select(m_Value(), m_ConstantInt(-1), m_ConstantInt(0)))) { - if (match(C, m_Not(SELECT_MATCH(B)))) - return SelectInst::Create(GET_SELECT_COND(C), A, D); - if (match(A, m_Not(SELECT_MATCH(B)))) - return SelectInst::Create(GET_SELECT_COND(A), C, D); + Value *Cond = GET_SELECT_COND(B); + if (match(C, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, A, D); + if (match(A, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, C, D); } if (match(C, m_Select(m_Value(), m_ConstantInt(-1), m_ConstantInt(0)))) { - if (match(D, m_Not(SELECT_MATCH(C)))) - return SelectInst::Create(GET_SELECT_COND(D), A, B); - if (match(B, m_Not(SELECT_MATCH(C)))) - return SelectInst::Create(GET_SELECT_COND(B), A, D); + Value *Cond = GET_SELECT_COND(C); + if (match(D, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, A, B); + if (match(B, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, A, D); } if (match(D, m_Select(m_Value(), m_ConstantInt(-1), m_ConstantInt(0)))) { - if (match(C, m_Not(SELECT_MATCH(D)))) - return SelectInst::Create(GET_SELECT_COND(C), A, B); - if (match(A, m_Not(SELECT_MATCH(D)))) - return SelectInst::Create(GET_SELECT_COND(A), C, B); + Value *Cond = GET_SELECT_COND(D); + if (match(C, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, A, B); + if (match(A, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, C, B); } if (match(A, m_Select(m_Value(), m_ConstantInt(0), m_ConstantInt(-1)))) { - if (match(D, m_Not(SELECT_MATCH(A)))) - return SelectInst::Create(GET_SELECT_COND(D), B, C); - if (match(B, m_Not(SELECT_MATCH(A)))) - return SelectInst::Create(GET_SELECT_COND(B), D, C); + Value *Cond = GET_SELECT_COND(A); + if (match(D, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, B, C); + if (match(B, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, D, C); } if (match(B, m_Select(m_Value(), m_ConstantInt(0), m_ConstantInt(-1)))) { - if (match(C, m_Not(SELECT_MATCH(B)))) - return SelectInst::Create(GET_SELECT_COND(C), D, A); - if (match(A, m_Not(SELECT_MATCH(B)))) - return SelectInst::Create(GET_SELECT_COND(A), D, C); + Value *Cond = GET_SELECT_COND(B); + if (match(C, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, D, A); + if (match(A, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, D, C); } if (match(C, m_Select(m_Value(), m_ConstantInt(0), m_ConstantInt(-1)))) { - if (match(D, m_Not(SELECT_MATCH(C)))) - return SelectInst::Create(GET_SELECT_COND(D), B, A); - if (match(B, m_Not(SELECT_MATCH(C)))) - return SelectInst::Create(GET_SELECT_COND(B), D, A); + Value *Cond = GET_SELECT_COND(C); + if (match(D, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, B, A); + if (match(B, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, D, A); } if (match(D, m_Select(m_Value(), m_ConstantInt(0), m_ConstantInt(-1)))) { - if (match(C, m_Not(SELECT_MATCH(D)))) - return SelectInst::Create(GET_SELECT_COND(C), B, A); - if (match(A, m_Not(SELECT_MATCH(D)))) - return SelectInst::Create(GET_SELECT_COND(A), B, C); + Value *Cond = GET_SELECT_COND(D); + if (match(C, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, B, A); + if (match(A, m_Not(SELECT_MATCH(Cond)))) + return SelectInst::Create(Cond, B, C); } #undef SELECT_MATCH #undef GET_SELECT_COND |
