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Implement xor.ll:test22
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21713 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -3550,6 +3550,15 @@ Instruction *InstCombiner::visitCastInst(CastInst &CI) {
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->getOpcode(), Op0c, Op1c);
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}
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}
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// cast (xor bool X, true) to int --> xor (cast bool X to int), 1
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if (SrcBitSize == 1 && SrcI->getOpcode() == Instruction::Xor &&
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Op1 == ConstantBool::True &&
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(!Op0->hasOneUse() || !isa<SetCondInst>(Op0))) {
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Value *New = InsertOperandCastBefore(Op0, DestTy, &CI);
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return BinaryOperator::createXor(New,
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ConstantInt::get(CI.getType(), 1));
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}
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break;
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case Instruction::Shl:
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// Allow changing the sign of the source operand. Do not allow changing
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