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Use the correct value for InSignBit.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48245 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-03-11 21:29:43 +00:00
parent ef5d194aaa
commit 9736028d84
2 changed files with 24 additions and 1 deletions
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2
lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@@ -892,7 +892,7 @@ bool TargetLowering::SimplifyDemandedBits(SDOperand Op,
MVT::ValueType InVT = Op.getOperand(0).getValueType();
unsigned InBits = MVT::getSizeInBits(InVT);
APInt InMask = APInt::getLowBitsSet(BitWidth, InBits);
APInt InSignBit = APInt::getLowBitsSet(BitWidth, InBits);
APInt InSignBit = APInt::getBitsSet(BitWidth, InBits - 1, InBits);
APInt NewBits = ~InMask & NewMask;
// If none of the top bits are demanded, convert this into an any_extend.