787   SmallVector<std::pair<Node *, EdgeSequence::call_iterator>, 16> DFSStack;  in switchInternalEdgeToRef()  local
813     assert(DFSStack.empty() &&  in switchInternalEdgeToRef()
828     DFSStack.push_back({RootN, (*RootN)->call_begin()});  in switchInternalEdgeToRef()
832       std::tie(N, I) = DFSStack.pop_back_val();  in switchInternalEdgeToRef()
839           DFSStack.push_back({N, I});  in switchInternalEdgeToRef()
861             while (!DFSStack.empty())  in switchInternalEdgeToRef()
862               OldSCC.Nodes.push_back(DFSStack.pop_back_val().first);  in switchInternalEdgeToRef()
918     } while (!DFSStack.empty());  in switchInternalEdgeToRef()
1234   SmallVector<std::pair<Node *, EdgeSequence::iterator>, 4> DFSStack;  in removeInternalRefEdge()  local
1237     assert(DFSStack.empty() &&  in removeInternalRefEdge()
1253     DFSStack.push_back({RootN, (*RootN)->begin()});  in removeInternalRefEdge()
1257       std::tie(N, I) = DFSStack.pop_back_val();  in removeInternalRefEdge()
1269           DFSStack.push_back({N, I});  in removeInternalRefEdge()
1301         assert(!DFSStack.empty() &&  in removeInternalRefEdge()
1342     } while (!DFSStack.empty());  in removeInternalRefEdge()
1344     assert(DFSStack.empty() && "Didn't flush the entire DFS stack!");  in removeInternalRefEdge()
1804   SmallVector<std::pair<Node *, EdgeItT>, 16> DFSStack;  in buildGenericSCCs()  local
1809     assert(DFSStack.empty() &&  in buildGenericSCCs()
1824     DFSStack.push_back({RootN, GetBegin(*RootN)});  in buildGenericSCCs()
1828       std::tie(N, I) = DFSStack.pop_back_val();  in buildGenericSCCs()
1835           DFSStack.push_back({N, I});  in buildGenericSCCs()
1884     } while (!DFSStack.empty());  in buildGenericSCCs()