改优化顺序,展开+并行后返回

src/middleend/loop_interchange.cpp

@@ -194,7 +194,7 @@ void LoopInterchange::run() {
     for (auto &loop : la_->loops) {
         if (loop->parent_ == nullptr) continue;
         if (loop->parent_->parent_ != nullptr) continue;
-        // if (loop->child_ == nullptr) continue;
+        if (loop->child_ == nullptr) continue;
         // only consider interchange outermost and second outermost loops
         auto outer_info = get_interchange_info(loop->parent_);
         auto inner_info = get_interchange_info(loop);