Simplify setting output.

examples/qualcomm/oss_scripts/llama2/runner/runner.cpp

@@ -187,7 +187,7 @@ Result<exec_aten::Tensor> Runner::run_model_step(
             *kv_outputs[j], new_out_addr, kv_outputs[j]->nbytes()) == Error::Ok,
         "Failed to set output tensor when updating v_cache");
     ET_CHECK_MSG(
-        module_->set_output_data_ptr(*kv_outputs[j], j + 1) == Error::Ok,
+        module_->set_output(*kv_outputs[j], j + 1) == Error::Ok,
         "Failed to set llama output data pointer");
   }
 
@@ -291,7 +291,7 @@ Error Runner::generate(
         sizes,
         kv_tensors.back()->scalar_type()));
     ET_CHECK_MSG(
-        module_->set_output_data_ptr(kv_outputs.back(), i + 1) == Error::Ok,
+        module_->set_output(kv_outputs.back(), i + 1) == Error::Ok,
         "Failed to set output tensor for kv cache");
   }
 
@@ -323,8 +323,7 @@ Error Runner::generate(
         sizes,
         kv_tensors.back()->scalar_type()));
     ET_CHECK_MSG(
-        module_->set_output_data_ptr(kv_outputs.back(), output_index) ==
-            Error::Ok,
+        module_->set_output(kv_outputs.back(), output_index) == Error::Ok,
         "Failed to set output tensor for llama block");
   }
 
@@ -333,7 +332,7 @@ Error Runner::generate(
       logits_data_shape,
       ScalarType::Float);
   ET_CHECK_MSG(
-      module_->set_output_data_ptr(affine_logits, 0) == Error::Ok,
+      module_->set_output(affine_logits) == Error::Ok,
       "Failed to set output tensor for affine module - logits");
 
   // Start consuming user's prompts and generating new tokens

examples/qualcomm/qaihub_scripts/llama/runner/io_memory.cpp

@@ -427,7 +427,7 @@ void KVCachedMemory::update_io(
             // k, v are placed interleaved
             int index = (cache_stride << 1) + (cache_group << 5) + head;
             ET_CHECK_MSG(
-                modules_[shard]->set_output_data_ptr(
+                modules_[shard]->set_output(
                     output_tensors[shard][index], index) == Error::Ok,
                 "failed to set output tensor for module %d's %d'th output "
                 "while updating kv_cache output tensors",
@@ -450,8 +450,8 @@ void KVCachedMemory::update_io(
     for (int shard = 0; shard < output_tensors.size(); shard++) {
       for (int index = 0; index < output_tensors[shard].size(); index++) {
         ET_CHECK_MSG(
-            modules_[shard]->set_output_data_ptr(
-                output_tensors[shard][index], index) == Error::Ok,
+            modules_[shard]->set_output(output_tensors[shard][index], index) ==
+                Error::Ok,
             "failed to set output tensor for module %d's %d'th output "
             "while updating kv_cache output tensors",
             shard,

examples/qualcomm/qaihub_scripts/llama/runner/runner.cpp

@@ -177,8 +177,7 @@ Error Runner::generate(
       output_tensors.emplace_back(io_mem_->get_output_tensors(i));
       for (size_t j = 0; j < output_tensors[i].size(); ++j) {
         ET_CHECK_MSG(
-            modules_[i]->set_output_data_ptr(output_tensors[i][j], j) ==
-                Error::Ok,
+            modules_[i]->set_output(output_tensors[i][j], j) == Error::Ok,
             "failed to set output tensor for module %d's %zu'th output",
             i,
             j);

examples/qualcomm/qaihub_scripts/stable_diffusion/runner/runner.cpp

@@ -373,11 +373,11 @@ Error Runner::generate(std::string prompt) {
       uncond_emb_vec.data(),
       {1, 77, 1024},
       encoder_method_meta.output_tensor_meta(0)->scalar_type());
-  modules_[0]->set_output_data_ptr(cond_emb_tensor, 0);
+  modules_[0]->set_output(cond_emb_tensor);
   long encoder_start = util::time_in_ms();
   auto cond_res = modules_[0]->forward(cond_tokens_tensor);
   stats_.text_encoder_execution_time += (util::time_in_ms() - encoder_start);
-  modules_[0]->set_output_data_ptr(uncond_emb_tensor, 0);
+  modules_[0]->set_output(uncond_emb_tensor);
   encoder_start = util::time_in_ms();
   auto uncond_res = modules_[0]->forward(uncond_tokens_tensor);
   stats_.text_encoder_execution_time += (util::time_in_ms() - encoder_start);
@@ -462,13 +462,13 @@ Error Runner::generate(std::string prompt) {
 
     stats_.unet_aggregate_post_processing_time +=
         (util::time_in_ms() - start_post_process);
-    modules_[1]->set_output_data_ptr(noise_pred_text_tensor, 0);
+    modules_[1]->set_output(noise_pred_text_tensor);
     long start_unet_execution = util::time_in_ms();
     auto cond_res = modules_[1]->forward(
         {latent_tensor, time_emb_tensors[step_index], cond_emb_tensor});
     stats_.unet_aggregate_execution_time +=
         (util::time_in_ms() - start_unet_execution);
-    modules_[1]->set_output_data_ptr(noise_pred_uncond_tensor, 0);
+    modules_[1]->set_output(noise_pred_uncond_tensor);
     start_unet_execution = util::time_in_ms();
     auto uncond_res = modules_[1]->forward(
         {latent_tensor,
@@ -519,7 +519,7 @@ Error Runner::generate(std::string prompt) {
 
   quant_tensor(latent, vae_input, vae_input_scale_, vae_input_offset_);
 
-  modules_[2]->set_output_data_ptr(output_tensor, 0);
+  modules_[2]->set_output(output_tensor);
   long start_vae_execution = util::time_in_ms();
   auto vae_res = modules_[2]->forward(vae_input_tensor);
   stats_.vae_execution_time = (util::time_in_ms() - start_vae_execution);

extension/module/module.cpp

@@ -218,13 +218,18 @@ runtime::Error Module::set_inputs(
   return runtime::Error::Ok;
 }
 
-runtime::Error Module::set_output_data_ptr(
+runtime::Error Module::set_output(
+    const std::string& method_name,
     runtime::EValue output_value,
-    size_t output_index,
-    const std::string& method_name) {
+    size_t output_index) {
   ET_CHECK_OK_OR_RETURN_ERROR(load_method(method_name));
-  auto& output_tensor = output_value.toTensor();
   auto& method = methods_.at(method_name).method;
+  ET_CHECK_OR_RETURN_ERROR(
+      output_value.isTensor(),
+      InvalidArgument,
+      "output type: %zu is not tensor",
+      (size_t)output_value.tag);
+  const auto& output_tensor = output_value.toTensor();
   return method->set_output_data_ptr(
       output_tensor.mutable_data_ptr(), output_tensor.nbytes(), output_index);
 }

extension/module/module.h

@@ -356,6 +356,42 @@ class Module {
     return set_inputs("forward", input_values);
   }
 
+  /**
+   * Sets the output tensor for a specific method.
+   *
+   * @param[in] method_name The name of the method.
+   * @param[in] output_value The EValue containing the Tensor to set as the
+   * method output.
+   * @param[in] output_index Zero-based index of the output to set.
+   *
+   * @returns An Error to indicate success or failure.
+   *
+   * @note Only Tensor outputs are currently supported for setting.
+   */
+  ET_NODISCARD
+  runtime::Error set_output(
+      const std::string& method_name,
+      runtime::EValue output_value,
+      size_t output_index = 0);
+
+  /**
+   * Sets the output tensor for the "forward" method.
+   *
+   * @param[in] output_value The EValue containing the Tensor to set as the
+   * method output.
+   * @param[in] output_index Zero-based index of the output to set.
+   *
+   * @returns An Error to indicate success or failure.
+   *
+   * @note Only Tensor outputs are currently supported for setting.
+   */
+  ET_NODISCARD
+  inline runtime::Error set_output(
+      runtime::EValue output_value,
+      size_t output_index = 0) {
+    return set_output("forward", std::move(output_value), output_index);
+  }
+
   /**
    * Retrieves the EventTracer instance being used by the Module.
    * EventTracer is used for tracking and logging events during the execution
@@ -368,19 +404,6 @@ class Module {
     return event_tracer_.get();
   }
 
-  /**
-   * Set output data pointer for forward method.
-   *
-   * @param[in] output_value A Tensor for the output of 'forward' method.
-   * @param[in] output_index Index of the output in 'forward' method.
-   *
-   * @returns An Error to indicate success or failure of the loading process.
-   */
-  runtime::Error set_output_data_ptr(
-      runtime::EValue output_value,
-      size_t output_index,
-      const std::string& method_name = "forward");
-
  private:
   struct MethodHolder {
     std::vector<std::vector<uint8_t>> planned_buffers;

extension/module/test/module_test.cpp

@@ -421,3 +421,17 @@ TEST_F(ModuleTest, TestUnsetInputs) {
   const auto result = module.forward();
   EXPECT_NE(result.error(), Error::Ok);
 }
+
+TEST_F(ModuleTest, TestSetOutputInvalidIndex) {
+  Module module(model_path_);
+
+  auto output_tensor = empty({1});
+
+  EXPECT_NE(module.set_output(output_tensor, 1), Error::Ok);
+}
+
+TEST_F(ModuleTest, TestSetOutputInvalidType) {
+  Module module(model_path_);
+
+  EXPECT_NE(module.set_output(EValue()), Error::Ok);
+}