202     SmallVector<MDNode *, 16> POT;                  // Post-order traversal.
211     Metadata &getFwdReference(MDNode &Op);
215   SmallVector<MDNode *, 16> DistinctWorklist;
219   SmallVector<MDNode *, 16> POTStorage;
242   Metadata *map(const MDNode &N);
264   Metadata *mapTopLevelUniquedNode(const MDNode &FirstN);
283   MDNode *mapDistinctNode(const MDNode &N);
302   bool createPOT(UniquedGraph &G, const MDNode &FirstN);
311   MDNode *visitOperands(UniquedGraph &G, MDNode::op_iterator &I,
312                         MDNode::op_iterator E, bool &HasChanged);
333   void remapOperands(MDNode &N, OperandMapper mapOperand);
567   const MDNode &N = *cast<MDNode>(Op);  in tryToMapOperand()
573 MDNode *MDNodeMapper::mapDistinctNode(const MDNode &N) {  in mapDistinctNode()
581     NewM = MDNode::replaceWithDistinct(N.clone());  in mapDistinctNode()
586   DistinctWorklist.push_back(cast<MDNode>(NewM));  in mapDistinctNode()
614 Metadata &MDNodeMapper::UniquedGraph::getFwdReference(MDNode &Op) {  in getFwdReference()
630 void MDNodeMapper::remapOperands(MDNode &N, OperandMapper mapOperand) {  in remapOperands()
648   MDNode *N;              ///< Current node.
649   MDNode::op_iterator Op; ///< Current operand of \c N.
655   POTWorklistEntry(MDNode &N) : N(&N), Op(N.op_begin()) {}  in POTWorklistEntry()
660 bool MDNodeMapper::createPOT(UniquedGraph &G, const MDNode &FirstN) {  in createPOT()
667   Worklist.push_back(POTWorklistEntry(const_cast<MDNode &>(FirstN)));  in createPOT()
672     if (MDNode *N = visitOperands(G, WE.Op, WE.N->op_end(), WE.HasChanged)) {  in createPOT()
692 MDNode *MDNodeMapper::visitOperands(UniquedGraph &G, MDNode::op_iterator &I,  in visitOperands()
693                                     MDNode::op_iterator E, bool &HasChanged) {  in visitOperands()
703     MDNode &OpN = *cast<MDNode>(Op);  in visitOperands()
716     for (MDNode *N : POT) {  in propagateChanges()
734   SmallVector<MDNode *, 16> CyclicNodes;  in mapNodesInPOT()
753       return &G.getFwdReference(*cast<MDNode>(Old));  in mapNodesInPOT()
756     auto *NewN = MDNode::replaceWithUniqued(std::move(ClonedN));  in mapNodesInPOT()
776 Metadata *MDNodeMapper::map(const MDNode &N) {  in map()
790       return mapTopLevelUniquedNode(*cast<MDNode>(Old));  in map()
795 Metadata *MDNodeMapper::mapTopLevelUniquedNode(const MDNode &FirstN) {  in mapTopLevelUniquedNode()
802     for (const MDNode *N : G.POT)  in mapTopLevelUniquedNode()
804     return &const_cast<MDNode &>(FirstN);  in mapTopLevelUniquedNode()
838   assert(isa<MDNode>(MD) && "Expected a metadata node");  in mapSimpleMetadata()
850   return MDNodeMapper(*this).map(*cast<MDNode>(MD));  in mapMetadata()
922   SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;  in remapInstruction()
925     MDNode *Old = MI.second;  in remapInstruction()
926     MDNode *New = cast_or_null<MDNode>(mapMetadata(Old));  in remapInstruction()
972   SmallVector<std::pair<unsigned, MDNode *>, 8> MDs;  in remapGlobalObjectMetadata()
976     GO.addMetadata(I.first, *cast<MDNode>(mapMetadata(I.second)));  in remapGlobalObjectMetadata()
1150 MDNode *ValueMapper::mapMDNode(const MDNode &N) {  in mapMDNode()
1151   return cast_or_null<MDNode>(mapMetadata(N));  in mapMDNode()