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Implement testcases InstCombine/or.ll:test16/test17

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7782 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-08-12 19:11:07 +00:00
parent c6da691cfe
commit 67ca768927
1 changed files with 13 additions and 0 deletions
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13
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -612,6 +612,19 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) {
}
}
// (A & C1)|(A & C2) == A & (C1|C2)
if (BinaryOperator *BO0 = dyn_cast<BinaryOperator>(Op0))
if (BinaryOperator *BO1 = dyn_cast<BinaryOperator>(Op1))
if (BO0->getOperand(0) == BO1->getOperand(0) &&
BO0->getOpcode() == Instruction::And &&
BO1->getOpcode() == Instruction::And)
if (ConstantIntegral *C0 =
dyn_cast<ConstantIntegral>(BO0->getOperand(1)))
if (ConstantIntegral *C1 =
dyn_cast<ConstantIntegral>(BO1->getOperand(1)))
return BinaryOperator::create(Instruction::And, BO0->getOperand(0),
*C0 | *C1);
Value *Op0NotVal = dyn_castNotVal(Op0);
Value *Op1NotVal = dyn_castNotVal(Op1);