Adjust base on broadcast

src/targets/gpu/compile_gen.cpp

@@ -94,8 +94,10 @@ vectorize vectorize::elements(context& ctx, std::size_t axis, const std::vector<
     std::size_t max_global = ctx.get_current_device().get_cu_count() *
                              ctx.get_current_device().get_max_workitems_per_cu();
     std::size_t over = n / max_global;
+    std::cout << "over: " << over << std::endl;
+    bool broadcasted = std::any_of(inputs.begin(), inputs.end(), [](const auto& s) { return s.broadcasted(); });
     std::vector<std::size_t> sizes;
-    if(over > 8)
+    if(broadcasted and over > 8)
         sizes.push_back(8);
     if(over > 4)
         sizes.push_back(4);