[llvm] [Support] Use block numbers for DomTree construction (PR #101706)

[Jakub Kuderski via llvm-commits]

================
@@ -60,6 +60,10 @@ struct SemiNCAInfo {
   static constexpr bool IsPostDom = DomTreeT::IsPostDominator;
   using GraphDiffT = GraphDiff<NodePtr, IsPostDom>;
 
+  template <typename T>
+  using has_number_t =
+      decltype(GraphTraits<T *>::getNumber(std::declval<T *>()));
----------------
kuhar wrote:

That would also make sense to me.

https://github.com/llvm/llvm-project/pull/101706