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[InstCombine] Add two FIXMEs for bad single use checks. NFC

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305510 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2017-06-15 21:38:48 +00:00
parent 66f76f7576
commit 240b649837
1 changed files with 4 additions and 0 deletions
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4
lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
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@ -2111,12 +2111,16 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) {
}
// (A ^ B) | ((B ^ C) ^ A) -> (A ^ B) | C
// FIXME: The two hasOneUse calls here are the same call, maybe we were
// supposed to check Op1->operand(0)?
if (match(Op0, m_Xor(m_Value(A), m_Value(B))))
if (match(Op1, m_Xor(m_Xor(m_Specific(B), m_Value(C)), m_Specific(A))))
if (Op1->hasOneUse() || cast<BinaryOperator>(Op1)->hasOneUse())
return BinaryOperator::CreateOr(Op0, C);
// ((A ^ C) ^ B) | (B ^ A) -> (B ^ A) | C
// FIXME: The two hasOneUse calls here are the same call, maybe we were
// supposed to check Op0->operand(0)?
if (match(Op0, m_Xor(m_Xor(m_Value(A), m_Value(C)), m_Value(B))))
if (match(Op1, m_Xor(m_Specific(B), m_Specific(A))))
if (Op0->hasOneUse() || cast<BinaryOperator>(Op0)->hasOneUse())