774   SmallVector<std::pair<Node *, EdgeSequence::call_iterator>, 16> DFSStack;  in switchInternalEdgeToRef()  local
800     assert(DFSStack.empty() &&  in switchInternalEdgeToRef()
815     DFSStack.emplace_back(RootN, (*RootN)->call_begin());  in switchInternalEdgeToRef()
817       auto [N, I] = DFSStack.pop_back_val();  in switchInternalEdgeToRef()
824           DFSStack.emplace_back(N, I);  in switchInternalEdgeToRef()
846             while (!DFSStack.empty())  in switchInternalEdgeToRef()
847               OldSCC.Nodes.push_back(DFSStack.pop_back_val().first);  in switchInternalEdgeToRef()
903     } while (!DFSStack.empty());  in switchInternalEdgeToRef()
1219   SmallVector<std::pair<Node *, EdgeSequence::iterator>, 4> DFSStack;  in removeInternalRefEdge()  local
1222     assert(DFSStack.empty() &&  in removeInternalRefEdge()
1238     DFSStack.emplace_back(RootN, (*RootN)->begin());  in removeInternalRefEdge()
1240       auto [N, I] = DFSStack.pop_back_val();  in removeInternalRefEdge()
1252           DFSStack.emplace_back(N, I);  in removeInternalRefEdge()
1284         assert(!DFSStack.empty() &&  in removeInternalRefEdge()
1325     } while (!DFSStack.empty());  in removeInternalRefEdge()
1327     assert(DFSStack.empty() && "Didn't flush the entire DFS stack!");  in removeInternalRefEdge()
1801   SmallVector<std::pair<Node *, EdgeItT>, 16> DFSStack;  in buildGenericSCCs()  local
1806     assert(DFSStack.empty() &&  in buildGenericSCCs()
1821     DFSStack.emplace_back(RootN, GetBegin(*RootN));  in buildGenericSCCs()
1823       auto [N, I] = DFSStack.pop_back_val();  in buildGenericSCCs()
1830           DFSStack.emplace_back(N, I);  in buildGenericSCCs()
1879     } while (!DFSStack.empty());  in buildGenericSCCs()