ZihengJiang commented on a change in pull request #7084:
URL: https://github.com/apache/tvm/pull/7084#discussion_r544733728



##########
File path: src/tir/transforms/make_packed_api.cc
##########
@@ -41,6 +41,56 @@
 namespace tvm {
 namespace tir {
 
+class ReturnRewriter : public StmtMutator {
+ public:
+  explicit ReturnRewriter(Var ret_var, Var ret_tcode) : ret_var_(ret_var), 
ret_tcode_(ret_tcode) {}
+
+  Stmt VisitStmt_(const EvaluateNode* node) override {
+    Stmt ret = StmtMutator::VisitStmt_(node);
+    const EvaluateNode* eval = ret.as<EvaluateNode>();
+    CHECK(eval);
+    if (const CallNode* call = eval->value.as<CallNode>()) {
+      if (call->op.same_as(builtin::ret())) {
+        CHECK_EQ(call->args.size(), 1);

Review comment:
       @tkonolige Things like this is quite easy to understand by eyeball the 
error throwing, I don't think error message is necessary for every place or 
would you like to add error message for every place like here? 
https://github.com/apache/tvm/blob/main/src/relay/op/nn/pad.cc#L58-L59




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