204     SmallVector<MDNode *, 16> POT;                  // Post-order traversal.
213     Metadata &getFwdReference(MDNode &Op);
217   SmallVector<MDNode *, 16> DistinctWorklist;
221   SmallVector<MDNode *, 16> POTStorage;
244   Metadata *map(const MDNode &N);
266   Metadata *mapTopLevelUniquedNode(const MDNode &FirstN);
285   MDNode *mapDistinctNode(const MDNode &N);
304   bool createPOT(UniquedGraph &G, const MDNode &FirstN);
313   MDNode *visitOperands(UniquedGraph &G, MDNode::op_iterator &I,
314                         MDNode::op_iterator E, bool &HasChanged);
335   void remapOperands(MDNode &N, OperandMapper mapOperand);
534   const MDNode &N = *cast<MDNode>(Op);  in tryToMapOperand()
540 static Metadata *cloneOrBuildODR(const MDNode &N) {  in cloneOrBuildODR()
547   return MDNode::replaceWithDistinct(N.clone());  in cloneOrBuildODR()
550 MDNode *MDNodeMapper::mapDistinctNode(const MDNode &N) {  in mapDistinctNode()
554       cast<MDNode>((M.Flags & RF_MoveDistinctMDs)  in mapDistinctNode()
583 Metadata &MDNodeMapper::UniquedGraph::getFwdReference(MDNode &Op) {  in getFwdReference()
599 void MDNodeMapper::remapOperands(MDNode &N, OperandMapper mapOperand) {  in remapOperands()
614   MDNode *N;              ///< Current node.
615   MDNode::op_iterator Op; ///< Current operand of \c N.
621   POTWorklistEntry(MDNode &N) : N(&N), Op(N.op_begin()) {}  in POTWorklistEntry()
626 bool MDNodeMapper::createPOT(UniquedGraph &G, const MDNode &FirstN) {  in createPOT()
633   Worklist.push_back(POTWorklistEntry(const_cast<MDNode &>(FirstN)));  in createPOT()
638     if (MDNode *N = visitOperands(G, WE.Op, WE.N->op_end(), WE.HasChanged)) {  in createPOT()
658 MDNode *MDNodeMapper::visitOperands(UniquedGraph &G, MDNode::op_iterator &I,  in visitOperands()
659                                     MDNode::op_iterator E, bool &HasChanged) {  in visitOperands()
669     MDNode &OpN = *cast<MDNode>(Op);  in visitOperands()
682     for (MDNode *N : POT) {  in propagateChanges()
700   SmallVector<MDNode *, 16> CyclicNodes;  in mapNodesInPOT()
719       return &G.getFwdReference(*cast<MDNode>(Old));  in mapNodesInPOT()
722     auto *NewN = MDNode::replaceWithUniqued(std::move(ClonedN));  in mapNodesInPOT()
737 Metadata *MDNodeMapper::map(const MDNode &N) {  in map()
751       return mapTopLevelUniquedNode(*cast<MDNode>(Old));  in map()
756 Metadata *MDNodeMapper::mapTopLevelUniquedNode(const MDNode &FirstN) {  in mapTopLevelUniquedNode()
763     for (const MDNode *N : G.POT)  in mapTopLevelUniquedNode()
765     return &const_cast<MDNode &>(FirstN);  in mapTopLevelUniquedNode()
816   assert(isa<MDNode>(MD) && "Expected a metadata node");  in mapSimpleMetadata()
828   return MDNodeMapper(*this).map(*cast<MDNode>(MD));  in mapMetadata()
896   SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;  in remapInstruction()
899     MDNode *Old = MI.second;  in remapInstruction()
900     MDNode *New = cast_or_null<MDNode>(mapMetadata(Old));  in remapInstruction()
931   SmallVector<std::pair<unsigned, MDNode *>, 8> MDs;  in remapGlobalObjectMetadata()
935     GO.addMetadata(I.first, *cast<MDNode>(mapMetadata(I.second)));  in remapGlobalObjectMetadata()
1109 MDNode *ValueMapper::mapMDNode(const MDNode &N) {  in mapMDNode()
1110   return cast_or_null<MDNode>(mapMetadata(N));  in mapMDNode()