avoid the expensive operation of copying a vector.
It also returns a maximum id by value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29478
91177308-0d34-0410-b5e6-
96231b3b80d8
unsigned AssignNodeIds();
/// AssignTopologicalOrder - Assign a unique node id for each node in the DAG
- /// based on their topological order. It returns a vector of the SDNodes* in
- /// assigned order.
- std::vector<SDNode*> AssignTopologicalOrder();
+ /// based on their topological order. It returns the maximum id and a vector
+ /// of the SDNodes* in assigned order by reference.
+ unsigned AssignTopologicalOrder(std::vector<SDNode*> &TopOrder);
void dump() const;