diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 028fa73..e8de969 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -5559,10 +5559,11 @@ Instruction *InstCombiner::FoldShiftByConstant(Value *Op0, ConstantInt *Op1, // Turn (Y + ((X >> C) & CC)) << C -> ((X & (CC << C)) + (Y << C)) Value *Op0BOOp1 = Op0BO->getOperand(1); - if (isLeftShift && Op0BOOp1->hasOneUse() && V2 == Op1 && + if (isLeftShift && Op0BOOp1->hasOneUse() && match(Op0BOOp1, m_And(m_Shr(m_Value(V1), m_Value(V2)),m_ConstantInt(CC))) && - cast<BinaryOperator>(Op0BOOp1)->getOperand(0)-> hasOneUse()) { + cast<BinaryOperator>(Op0BOOp1)->getOperand(0)->hasOneUse() && + V2 == Op1) { Instruction *YS = BinaryOperator::createShl( Op0BO->getOperand(0), Op1, Op0BO->getName()); |