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Fix a regression in InstCombine/xor.ll

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llvm-svn: 15410
This commit is contained in:
Chris Lattner 2004-08-01 19:42:59 +00:00
parent 2677b71f64
commit 41c8b70624
1 changed files with 2 additions and 2 deletions
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4
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -1343,11 +1343,11 @@ Instruction *InstCombiner::visitXor(BinaryOperator &I) {
return ReplaceInstUsesWith(I, Op0I->getOperand(0));
}
// (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1^C2 == 0
// (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0
Value *A, *B; ConstantInt *C1, *C2;
if (match(Op0, m_And(m_Value(A), m_ConstantInt(C1))) &&
match(Op1, m_And(m_Value(B), m_ConstantInt(C2))) &&
ConstantExpr::getXor(C1, C2)->isNullValue())
ConstantExpr::getAnd(C1, C2)->isNullValue())
return BinaryOperator::createOr(Op0, Op1);
// (setcc1 A, B) ^ (setcc2 A, B) --> (setcc3 A, B)