diff --git a/compiler/circle2circle/src/Circle2Circle.cpp b/compiler/circle2circle/src/Circle2Circle.cpp
index 16100dbbeb7..34f9ffaf55c 100644
--- a/compiler/circle2circle/src/Circle2Circle.cpp
+++ b/compiler/circle2circle/src/Circle2Circle.cpp
@@ -515,7 +515,7 @@ int entry(int argc, char **argv)
     luci::change_outputs(graph, new_outputs);
   }
 
-  // call luci optimizations for module before optimizations for graph
+  // call luci optimizations for module
   optimizer.optimize(module.get());
 
   for (size_t idx = 0; idx < module->size(); ++idx)
diff --git a/compiler/luci/pass/src/EliminateDeadSubgraphPass.cpp b/compiler/luci/pass/src/EliminateDeadSubgraphPass.cpp
index b2670df7335..5653c1b6e9f 100644
--- a/compiler/luci/pass/src/EliminateDeadSubgraphPass.cpp
+++ b/compiler/luci/pass/src/EliminateDeadSubgraphPass.cpp
@@ -49,37 +49,34 @@ void checkGraph(loco::Graph *current_graph, std::deque<size_t> &reachable_graphs
   // TODO: check all nodes which can be used to reach different subgraph
   for (auto &node : active_nodes)
   {
-    auto *circle_node = dynamic_cast<luci::CircleNode *>(node);
-    assert(circle_node != nullptr);
+    auto *circle_node = loco::must_cast<luci::CircleNode *>(node);
 
     switch (circle_node->opcode())
     {
       case CircleOpcode::WHILE:
       {
-        auto *while_node = dynamic_cast<luci::CircleWhile *>(circle_node);
-        assert(while_node != nullptr);
+        auto *while_node = loco::must_cast<luci::CircleWhile *>(circle_node);
         // Get body and cond graph indexes
         int32_t body_graph_index = while_node->body_branch();
         int32_t cond_graph_index = while_node->cond_branch();
         assert(body_graph_index >= 0);
         assert(cond_graph_index >= 0);
         // Add indexes into queue
-        reachable_graphs_indexes_q.push_back(size_t(body_graph_index));
-        reachable_graphs_indexes_q.push_back(size_t(cond_graph_index));
+        reachable_graphs_indexes_q.push_back(static_cast<size_t>(body_graph_index));
+        reachable_graphs_indexes_q.push_back(static_cast<size_t>(cond_graph_index));
       }
       break;
       case CircleOpcode::IF:
       {
-        auto *if_node = dynamic_cast<luci::CircleIf *>(circle_node);
-        assert(if_node != nullptr);
+        auto *if_node = loco::must_cast<luci::CircleIf *>(circle_node);
         // Get then and else graph indexes
         int32_t else_index = if_node->else_branch();
         int32_t then_index = if_node->then_branch();
         assert(else_index >= 0);
         assert(then_index >= 0);
         // Add indexes into queue
-        reachable_graphs_indexes_q.push_back(size_t(else_index));
-        reachable_graphs_indexes_q.push_back(size_t(then_index));
+        reachable_graphs_indexes_q.push_back(static_cast<size_t>(else_index));
+        reachable_graphs_indexes_q.push_back(static_cast<size_t>(then_index));
       }
       break;
       default: