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Implement testcases InstCombine/or.ll:test16/test17
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7782 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -612,6 +612,19 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) {
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}
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}
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// (A & C1)|(A & C2) == A & (C1|C2)
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if (BinaryOperator *BO0 = dyn_cast<BinaryOperator>(Op0))
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if (BinaryOperator *BO1 = dyn_cast<BinaryOperator>(Op1))
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if (BO0->getOperand(0) == BO1->getOperand(0) &&
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BO0->getOpcode() == Instruction::And &&
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BO1->getOpcode() == Instruction::And)
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if (ConstantIntegral *C0 =
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dyn_cast<ConstantIntegral>(BO0->getOperand(1)))
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if (ConstantIntegral *C1 =
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dyn_cast<ConstantIntegral>(BO1->getOperand(1)))
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return BinaryOperator::create(Instruction::And, BO0->getOperand(0),
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*C0 | *C1);
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Value *Op0NotVal = dyn_castNotVal(Op0);
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Value *Op1NotVal = dyn_castNotVal(Op1);
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