(bugfix): args for some op(for example, conv2d) does not has type attr

lite/core/mir/int64_to_int32_pass.cc

@@ -104,7 +104,7 @@ void Int64ToInt32Pass::ChangeInt64ToInt32IfNeeded(Node* inst_node) {
   for (auto* in : inst_node->inlinks) {
     CHECK(in->IsRoleSet());
     CHECK(in->IsArg());
-    CHECK(in->AsArg().type);
+    if (in->AsArg().type) {
       auto in_arg_name = in->AsArg().name;
       std::string tmp;
       CHECK(inst.op_info()->GetInputArgname(in_arg_name, &tmp));
@@ -124,11 +124,12 @@ void Int64ToInt32Pass::ChangeInt64ToInt32IfNeeded(Node* inst_node) {
                                                 in->AsArg().type->layout()));
       }
     }
+  }
 
   for (auto* out : inst_node->outlinks) {
     CHECK(out->IsRoleSet());
     CHECK(out->IsArg());
-    CHECK(out->AsArg().type);
+    if (out->AsArg().type) {
       auto out_arg_name = out->AsArg().name;
       std::string tmp;
       CHECK(inst.op_info()->GetOutputArgname(out_arg_name, &tmp));
@@ -147,6 +148,7 @@ void Int64ToInt32Pass::ChangeInt64ToInt32IfNeeded(Node* inst_node) {
                                                 out->AsArg().type->layout()));
       }
     }
+  }
 }
 }  // namespace mir
 }  // namespace lite