Update

[ghstack-poisoned]

Author: swolchok

test/CMakeLists.txt

@@ -68,5 +68,18 @@ if(CMAKE_BUILD_TYPE EQUAL "Release")
   target_link_options(size_test_all_ops PRIVATE "LINKER:--gc-sections")
 endif()
 
+#
+# size_test_all_optimized_ops: binary with optimized ops and no delegate backend
+#
+if(EXECUTORCH_BUILD_KERNELS_OPTIMIZED)
+add_executable(size_test_all_optimized_ops ${_size_test__srcs})
+target_link_options_shared_lib(optimized_native_cpu_ops_lib)
+target_link_libraries(
+  size_test_all_optimized_ops executorch optimized_native_cpu_ops_lib)
+if(CMAKE_BUILD_TYPE EQUAL "Release")
+  target_link_options(size_test_all_optimized_ops PRIVATE "LINKER:--gc-sections")
+endif()
+endif()
+
 # Print all summary
 executorch_print_configuration_summary()

test/build_optimized_size_test.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+# Unlike build_size_test.sh, this script:
+# - does not attempt to disable exceptions and RTTI
+# - as a consequence, is able to build optimized kernels
+# - uses MinSizeRel builds
+# - is not currently intended to run in CI
+# - sets -g to make it easier to use tools like bloaty to investigate size
+
+set -e
+
+# shellcheck source=/dev/null
+source "$(dirname "${BASH_SOURCE[0]}")/../.ci/scripts/utils.sh"
+
+cmake_install_executorch_lib() {
+  echo "Installing libexecutorch.a"
+  clean_executorch_install_folders
+  update_tokenizers_git_submodule
+  CXXFLAGS="-g" retry cmake -DBUCK2="$BUCK2" \
+          -DCMAKE_CXX_STANDARD_REQUIRED=ON \
+          -DCMAKE_INSTALL_PREFIX=cmake-out \
+          -DCMAKE_BUILD_TYPE=MinSizeRel \
+          -DEXECUTORCH_BUILD_EXECUTOR_RUNNER=OFF \
+          -DEXECUTORCH_BUILD_KERNELS_OPTIMIZED=ON \
+          -DOPTIMIZE_SIZE=ON \
+          -DPYTHON_EXECUTABLE="$PYTHON_EXECUTABLE" \
+          -Bcmake-out .
+  cmake --build cmake-out -j9 --target install --config MinSizeRel
+}
+
+test_cmake_size_test() {
+    CXXFLAGS="-g" retry cmake -DCMAKE_BUILD_TYPE=MinSizeRel -DEXECUTORCH_BUILD_KERNELS_OPTIMIZED=ON -DCMAKE_INSTALL_PREFIX=cmake-out -Bcmake-out/test test
+
+    echo "Build size test"
+    cmake --build cmake-out/test -j9 --config MinSizeRel
+
+    echo 'ExecuTorch with no ops binary size, unstripped:'
+    ls -al cmake-out/test/size_test
+
+    echo 'ExecuTorch with portable ops binary size, unstripped:'
+    ls -al cmake-out/test/size_test_all_ops
+
+    echo 'ExecuTorch with optimized ops binary size, unstripped:'
+    ls -al cmake-out/test/size_test_all_optimized_ops
+}
+
+if [[ -z $PYTHON_EXECUTABLE ]]; then
+  PYTHON_EXECUTABLE=python3
+fi
+
+cmake_install_executorch_lib
+test_cmake_size_test