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Fix a mistake in my previous patch pointed out by sabre; the AssertZext

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case in MaskedValueIsZero was wrong.

llvm-svn: 23165
This commit is contained in:
Nate Begeman 2005-08-31 00:43:08 +00:00
parent d754412b26
commit d286f16856
1 changed files with 3 additions and 2 deletions
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5
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -1095,10 +1095,11 @@ static bool MaskedValueIsZero(const SDOperand &Op, uint64_t Mask,
SrcBits = MVT::getSizeInBits(cast<VTSDNode>(Op.getOperand(3))->getVT());
return (Mask & ((1ULL << SrcBits)-1)) == 0; // Returning only the zext bits.
case ISD::ZERO_EXTEND:
case ISD::AssertZext:
SrcBits = MVT::getSizeInBits(Op.getOperand(0).getValueType());
return MaskedValueIsZero(Op.getOperand(0),Mask & ((1ULL << SrcBits)-1),TLI);
case ISD::AssertZext:
SrcBits = MVT::getSizeInBits(cast<VTSDNode>(Op.getOperand(1))->getVT());
return (Mask & ((1ULL << SrcBits)-1) == 0; // Returning only the zext bits.
case ISD::AND:
// (X & C1) & C2 == 0 iff C1 & C2 == 0.
if (ConstantSDNode *AndRHS = dyn_cast<ConstantSDNode>(Op.getOperand(1)))