Handle mark_dependence in DeadObjectElimination

Author: meg-gupta

lib/SILOptimizer/Transforms/DeadObjectElimination.cpp

@@ -616,6 +616,13 @@ recursivelyCollectInteriorUses(ValueBase *DefInst,
       AllUsers.insert(User);
       continue;
     }
+    if (auto *MDI = dyn_cast<MarkDependenceInst>(User)) {
+      if (!recursivelyCollectInteriorUses(MDI, AddressNode,
+                                          IsInteriorAddress)) {
+        return false;
+      }
+      continue;
+    }
     if (auto PTAI = dyn_cast<PointerToAddressInst>(User)) {
       // Only one pointer-to-address is allowed for safety.
       if (SeenPtrToAddr)