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Differential D59260 Diff 190273 llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

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llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

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Show First 20 Lines • Show All 1,701 Lines • ▼ Show 20 Lines if (N->getNumOperands() == 2) {
if (getInputChainForNode(N->getOperand(1).getNode()) == N->getOperand(0)) if (getInputChainForNode(N->getOperand(1).getNode()) == N->getOperand(0))
return N->getOperand(1); return N->getOperand(1);
} }
// Don't simplify token factors if optnone. // Don't simplify token factors if optnone.
if (OptLevel == CodeGenOpt::None) if (OptLevel == CodeGenOpt::None)
return SDValue(); return SDValue();
// If this is used only a single token factor, we should make sure we have a
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// chance to merge them together. This prevents TF chains from inhibiting
// optimizations.
if (N->hasOneUse() && N->use_begin()->getOpcode() == ISD::TokenFactor)
AddToWorklist(*(N->use_begin()));
SmallVector<SDNode *, 8> TFs; // List of token factors to visit. SmallVector<SDNode *, 8> TFs; // List of token factors to visit.
SmallVector<SDValue, 8> Ops; // Ops for replacing token factor. SmallVector<SDValue, 8> Ops; // Ops for replacing token factor.
SmallPtrSet<SDNode*, 16> SeenOps; SmallPtrSet<SDNode*, 16> SeenOps;
bool Changed = false; // If we should replace this token factor. bool Changed = false; // If we should replace this token factor.
// Start out with this token factor. // Start out with this token factor.
TFs.push_back(N); TFs.push_back(N);
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