yuxihu commented on a change in pull request #14728: [MXNET-1386] fix for shape 
mismatch
URL: https://github.com/apache/incubator-mxnet/pull/14728#discussion_r277399080
 
 

 ##########
 File path: src/executor/trt_graph_executor.cc
 ##########
 @@ -175,20 +176,31 @@ void TrtGraphExecutor::InitArguments(const 
nnvm::IndexedGraph& idx,
                                   const std::unordered_set<std::string>& 
shared_arg_names,
                                   const Executor* shared_exec,
                                   std::unordered_map<std::string, NDArray>* 
shared_buffer,
+                                  std::vector<std::string>* in_names,
                                   std::vector<NDArray>* in_arg_vec,
                                   std::vector<NDArray>* arg_grad_vec,
                                   std::vector<NDArray>* aux_state_vec) {
+  // build name/index map for graph input nodes
+  std::map<std::string, uint32_t> inv_name_map;
+  for (size_t i = 0; i < num_forward_inputs_; ++i) {
+    const uint32_t nid = idx.input_nodes().at(i);
+    const std::string& arg_name = idx[nid].source->attrs.name;
+    inv_name_map[arg_name] = nid;
+  }
+
   // initialize in_args, arg_grads, and aux_states and populate grad_store_
   data_entry_.resize(idx.num_node_entries());
   size_t arg_top = 0, aux_top = 0;
   const auto& mutable_nodes = idx.mutable_input_nodes();
   for (size_t i = 0; i < num_forward_inputs_; ++i) {
-    const uint32_t nid = idx.input_nodes().at(i);
+    // get name from input names vector, and lookup new index of graph input 
node
+    const std::string arg_name = in_names->at(i);
 
 Review comment:
   std::string?

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