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avoid work when possible, perhaps fix the problem nate and andrew are seeing

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with != 0 comparisons vanishing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21287 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-04-13 19:41:05 +00:00
parent c24b537399
commit 51679c430f
1 changed files with 1 additions and 0 deletions
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lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@@ -286,6 +286,7 @@ SelectionDAG::~SelectionDAG() {
} }
SDOperand SelectionDAG::getZeroExtendInReg(SDOperand Op, MVT::ValueType VT) { SDOperand SelectionDAG::getZeroExtendInReg(SDOperand Op, MVT::ValueType VT) {
if (Op.getValueType() == VT) return Op;
int64_t Imm = ~0ULL >> 64-MVT::getSizeInBits(VT); int64_t Imm = ~0ULL >> 64-MVT::getSizeInBits(VT);
return getNode(ISD::AND, Op.getValueType(), Op, return getNode(ISD::AND, Op.getValueType(), Op,
getConstant(Imm, Op.getValueType())); getConstant(Imm, Op.getValueType()));