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implement and.ll:test33

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21809 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-05-09 04:58:36 +00:00
parent 2f2c3e4392
commit 6e4c6495eb
1 changed files with 18 additions and 2 deletions
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20
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -1832,8 +1832,8 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) {
ConstantInt *C1; Value *X;
// (X & C1) | C2 --> (X | C2) & (C1|C2)
if (match(Op0, m_And(m_Value(X), m_ConstantInt(C1))) && isOnlyUse(Op0)) {
std::string Op0Name = Op0->getName(); Op0->setName("");
Instruction *Or = BinaryOperator::createOr(X, RHS, Op0Name);
Instruction *Or = BinaryOperator::createOr(X, RHS, Op0->getName());
Op0->setName("");
InsertNewInstBefore(Or, I);
return BinaryOperator::createAnd(Or, ConstantExpr::getOr(RHS, C1));
}
@ -1865,6 +1865,22 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) {
if (A == Op0 || B == Op0) // A | (A & ?) --> A
return ReplaceInstUsesWith(I, Op0);
// (X^C)|Y -> (X|Y)^C iff Y&C == 0
if (Op0->hasOneUse() && match(Op0, m_Xor(m_Value(A), m_ConstantInt(C1))) &&
MaskedValueIsZero(Op1, C1)) {
Instruction *NOr = BinaryOperator::createOr(A, Op1, Op0->getName());
Op0->setName("");
return BinaryOperator::createXor(InsertNewInstBefore(NOr, I), C1);
}
// Y|(X^C) -> (X|Y)^C iff Y&C == 0
if (Op1->hasOneUse() && match(Op1, m_Xor(m_Value(A), m_ConstantInt(C1))) &&
MaskedValueIsZero(Op0, C1)) {
Instruction *NOr = BinaryOperator::createOr(A, Op0, Op1->getName());
Op0->setName("");
return BinaryOperator::createXor(InsertNewInstBefore(NOr, I), C1);
}
// (A & C1)|(A & C2) == A & (C1|C2)
if (match(Op0, m_And(m_Value(A), m_ConstantInt(C1))) &&
match(Op1, m_And(m_Value(B), m_ConstantInt(C2))) && A == B)