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Simplify code

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7783 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-08-12 19:17:27 +00:00
parent 67ca768927
commit e132d95b62
1 changed files with 8 additions and 11 deletions
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19
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -241,7 +241,8 @@ static inline Value *dyn_castFoldableMul(Value *V) {
// dyn_castMaskingAnd - If this value is an And instruction masking a value with // dyn_castMaskingAnd - If this value is an And instruction masking a value with
// a constant, return the constant being anded with. // a constant, return the constant being anded with.
// //
static inline Constant *dyn_castMaskingAnd(Value *V) { template<class ValueType>
static inline Constant *dyn_castMaskingAnd(ValueType *V) {
if (Instruction *I = dyn_cast<Instruction>(V)) if (Instruction *I = dyn_cast<Instruction>(V))
if (I->getOpcode() == Instruction::And) if (I->getOpcode() == Instruction::And)
return dyn_cast<Constant>(I->getOperand(1)); return dyn_cast<Constant>(I->getOperand(1));
@ -613,16 +614,12 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) {
} }
// (A & C1)|(A & C2) == A & (C1|C2) // (A & C1)|(A & C2) == A & (C1|C2)
if (BinaryOperator *BO0 = dyn_cast<BinaryOperator>(Op0)) if (Instruction *LHS = dyn_cast<BinaryOperator>(Op0))
if (BinaryOperator *BO1 = dyn_cast<BinaryOperator>(Op1)) if (Instruction *RHS = dyn_cast<BinaryOperator>(Op1))
if (BO0->getOperand(0) == BO1->getOperand(0) && if (LHS->getOperand(0) == RHS->getOperand(0))
BO0->getOpcode() == Instruction::And && if (Constant *C0 = dyn_castMaskingAnd(LHS))
BO1->getOpcode() == Instruction::And) if (Constant *C1 = dyn_castMaskingAnd(RHS))
if (ConstantIntegral *C0 = return BinaryOperator::create(Instruction::And, LHS->getOperand(0),
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); *C0 | *C1);
Value *Op0NotVal = dyn_castNotVal(Op0); Value *Op0NotVal = dyn_castNotVal(Op0);