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Fix InstCombine/2007-03-31-InfiniteLoop.ll 

llvm-svn: 35536
This commit is contained in:
Chris Lattner 2007-04-01 05:36:37 +00:00
parent 9729bdd8e3
commit 0427799531
1 changed files with 3 additions and 1 deletions
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4
llvm/lib/Transforms/Scalar/InstructionCombining.cpp
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@ -4083,8 +4083,10 @@ Instruction *InstCombiner::visitXor(BinaryOperator &I) {
else if (Op0 == B) // A^(B^A) == B
return ReplaceInstUsesWith(I, A);
} else if (match(Op1I, m_And(m_Value(A), m_Value(B))) && Op1I->hasOneUse()){
if (A == Op0) // A^(A&B) -> A^(B&A)
if (A == Op0) { // A^(A&B) -> A^(B&A)
Op1I->swapOperands();
std::swap(A, B);
}
if (B == Op0) { // A^(B&A) -> (B&A)^A
I.swapOperands(); // Simplified below.
std::swap(Op0, Op1);