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Simplify code

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llvm-svn: 7783
This commit is contained in:
Chris Lattner 2003-08-12 19:17:27 +00:00
parent c9c1d9f778
commit 2e2432d69e
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
// 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 (I->getOpcode() == Instruction::And)
return dyn_cast<Constant>(I->getOperand(1));
@ -613,16 +614,12 @@ 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),
if (Instruction *LHS = dyn_cast<BinaryOperator>(Op0))
if (Instruction *RHS = dyn_cast<BinaryOperator>(Op1))
if (LHS->getOperand(0) == RHS->getOperand(0))
if (Constant *C0 = dyn_castMaskingAnd(LHS))
if (Constant *C1 = dyn_castMaskingAnd(RHS))
return BinaryOperator::create(Instruction::And, LHS->getOperand(0),
*C0 | *C1);
Value *Op0NotVal = dyn_castNotVal(Op0);