chore: import upstream snapshot with attribution

tensorflow/lite/tools/evaluation/tasks/ios/BUILD.apple

@@ -0,0 +1,37 @@
+load("@bazel_skylib//rules:build_test.bzl", "build_test")
+load("@build_bazel_rules_apple//apple:ios.bzl", "ios_static_framework")
+load("//tensorflow/lite/ios:ios.bzl", "TFL_MINIMUM_OS_VERSION")
+
+package(
+    # copybara:uncomment default_applicable_licenses = ["//tensorflow:license"],
+    licenses = ["notice"],
+)
+
+# Main target for the inference diff tool iOS framework.
+# bazel build --config=ios_arm64 -c opt --cxxopt=-std=c++17 //tensorflow/lite/tools/evaluation/tasks/ios:TensorFlowLiteInferenceDiffC_framework
+ios_static_framework(
+    name = "TensorFlowLiteInferenceDiffC_framework",
+    hdrs = [
+        "//tensorflow/lite/tools:logging.h",
+        "//tensorflow/lite/tools/evaluation/tasks:task_executor_c_api.h",
+    ],
+    bundle_name = "TensorFlowLiteInferenceDiffC",
+    minimum_os_version = TFL_MINIMUM_OS_VERSION,
+    deps = [
+        "//tensorflow/lite/tools/evaluation/tasks:task_executor_c_api",
+        "//tensorflow/lite/tools/evaluation/tasks/inference_diff:run_eval_lib",
+    ],
+)
+
+# Used for building TensorFlowLiteInferenceDiffC_framework framework.
+build_test(
+    name = "framework_build_test",
+    # build_test targets are not meant to be run with sanitizers.
+    tags = [
+        "nomsan",
+        "notsan",
+    ],
+    targets = [
+        ":TensorFlowLiteInferenceDiffC_framework",
+    ],
+)

tensorflow/lite/tools/evaluation/tasks/ios/README.md

@@ -0,0 +1,43 @@
+# TFLite iOS evaluation app.
+
+## Description
+
+An iOS app to evaluate TFLite models. This is mainly for running different
+evaluation tasks on iOS. Right now it only supports evaluating the inference
+difference between cpu and delegates.
+
+The app reads evaluation parameters from a JSON file named
+`evaluation_params.json` in its `evaluation_data` directory. Any downloaded
+models for evaluation should also be placed in `evaluation_data` directory.
+
+The JSON file specifies the name of the model file and other evaluation
+parameters like number of iterations, number of threads, delegate name. The
+default values in the JSON file are for the Mobilenet_v2_1.0_224 model
+([tflite&pb][mobilenet-model]).
+
+## Building / running the app
+
+*   Follow the [iOS build instructions][build-ios] to configure the Bazel
+    workspace and `.bazelrc` file correctly.
+
+*   Run `build_evaluation_framework.sh` script to build the evaluation
+    framework. This script will build the evaluation framework targeting iOS
+    arm64 and put it under `TFLiteEvaluation/TFLiteEvaluation/Frameworks`
+    directory.
+
+*   Update evaluation parameters in `evaluation_params.json`.
+
+*   Change `Build Phases -> Copy Bundle Resources` and add the model file to the
+    resources that need to be copied.
+
+*   Ensure that `Build Phases -> Link Binary With Library` contains the
+    `Accelerate framework` and `TensorFlowLiteInferenceDiffC.framework`.
+
+*   Now try running the app. The app has a single button that runs the
+    evaluation on the model and displays results in a text view below. You can
+    also see the console output section in your Xcode to see more detailed
+    information.
+
+[build-ios]: https://tensorflow.org/lite/guide/build_ios
+[mobilenet-model]: https://github.com/tensorflow/tflite-support/raw/master/tensorflow_lite_support/metadata/python/tests/testdata/image_classifier/mobilenet_v2_1.0_224.tflite
+[mobilenet-paper]: https://arxiv.org/pdf/1704.04861.pdf

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/AppDelegate.h

@@ -0,0 +1,22 @@
+// Copyright 2022 The TensorFlow Authors. All Rights Reserved.
+
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property(strong, nonatomic) UIWindow *window;
+
+@end

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/AppDelegate.m

@@ -0,0 +1,27 @@
+// Copyright 2022 The TensorFlow Authors. All Rights Reserved.
+
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "AppDelegate.h"
+
+@interface AppDelegate ()
+
+@end
+
+@implementation AppDelegate
+- (BOOL)application:(UIApplication *)application
+    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+  return YES;
+}
+@end

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,98 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "83.5x83.5"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "scale" : "1x",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/Base.lproj/Main.storyboard

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="23727" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+    <device id="retina6_1" orientation="portrait" appearance="light"/>
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="23721"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--Evaluation View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="EvaluationViewController" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <button opaque="NO" contentMode="scaleToFill" misplaced="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="system" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="j0O-Lq-1tJ">
+                                <rect key="frame" x="64" y="97" width="286" height="63"/>
+                                <constraints>
+                                    <constraint firstAttribute="height" constant="63" id="8VO-Ln-L2h"/>
+                                </constraints>
+                                <fontDescription key="fontDescription" type="system" pointSize="24"/>
+                                <state key="normal" title="Evaluate model"/>
+                                <connections>
+                                    <action selector="onEvaluateModel:" destination="BYZ-38-t0r" eventType="touchUpInside" id="Rb1-hs-Mub"/>
+                                </connections>
+                            </button>
+                            <textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" editable="NO" textAlignment="natural" selectable="NO" translatesAutoresizingMaskIntoConstraints="NO" id="Vd4-Gf-qKO">
+                                <rect key="frame" x="26" y="177" width="368" height="641"/>
+                                <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
+                                <textInputTraits key="textInputTraits" autocapitalizationType="sentences"/>
+                            </textView>
+                        </subviews>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="Vd4-Gf-qKO" firstAttribute="top" secondItem="j0O-Lq-1tJ" secondAttribute="bottom" constant="18" id="Kd3-pP-C1k"/>
+                            <constraint firstItem="j0O-Lq-1tJ" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="QJU-cq-L87"/>
+                            <constraint firstItem="Vd4-Gf-qKO" firstAttribute="trailing" secondItem="8bC-Xf-vdC" secondAttribute="trailingMargin" id="Tew-W4-Vq5"/>
+                            <constraint firstItem="j0O-Lq-1tJ" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" id="Uce-n7-kZI"/>
+                            <constraint firstItem="j0O-Lq-1tJ" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="64" id="Uhq-Rw-NKT"/>
+                            <constraint firstItem="Vd4-Gf-qKO" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="26" id="aXc-6M-kyL"/>
+                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="bottom" secondItem="Vd4-Gf-qKO" secondAttribute="bottom" constant="10" id="tz5-wP-LZs"/>
+                        </constraints>
+                    </view>
+                    <connections>
+                        <outlet property="resultsView" destination="Vd4-Gf-qKO" id="dBT-f6-SYw"/>
+                    </connections>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="140" y="122.78860569715144"/>
+        </scene>
+    </scenes>
+</document>

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/EvaluationViewController.h

@@ -0,0 +1,22 @@
+// Copyright 2022 The TensorFlow Authors. All Rights Reserved.
+
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+
+@interface EvaluationViewController : UIViewController
+@property(weak, nonatomic) IBOutlet UITextView *resultsView;
+
+@end

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/EvaluationViewController.mm

@@ -0,0 +1,141 @@
+// Copyright 2022 The TensorFlow Authors. All Rights Reserved.
+
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "EvaluationViewController.h"
+#import <algorithm>
+#include <fstream>
+#import <sstream>
+#import <string>
+#import <vector>
+
+#import <TensorFlowLiteInferenceDiffC/TensorFlowLiteInferenceDiffC.h>
+
+namespace {
+
+NSString* const kDocumentsPrefix = @"/Documents/";
+NSString* const kModelFileKey = @"model_file";
+NSString* const kOutputFilePathKey = @"output_file_path";
+
+NSString* FilePathForResourceName(NSString* filename) {
+  NSString* name = [filename stringByDeletingPathExtension];
+  NSString* extension = [filename pathExtension];
+  NSString* file_path = [[NSBundle mainBundle] pathForResource:name ofType:extension];
+  if (file_path == NULL) {
+    TFLITE_LOG(FATAL) << "Couldn't find '" << [name UTF8String] << "." << [extension UTF8String]
+                      << "' in bundle.";
+  }
+  return file_path;
+}
+
+NSDictionary* ParseEvaluationParamsJson() {
+  NSString* params_json_path = FilePathForResourceName(@"evaluation_params.json");
+  NSData* data = [NSData dataWithContentsOfFile:params_json_path];
+  NSDictionary* dict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
+  return dict;
+}
+
+std::string FormatCommandLineParam(NSString* key, NSString* value) {
+  std::ostringstream stream;
+  stream << "--" << [key UTF8String] << "=" << [value UTF8String];
+  return stream.str();
+}
+
+// Reads the |evaluation_params.json| to read command line parameters and returns them as a vector
+// of strings.
+// Returns the evaluation parameters as key-value pairs.
+void ReadCommandLineParameters(std::vector<std::string>* params) {
+  NSDictionary* param_dict = ParseEvaluationParamsJson();
+  for (NSString* key in param_dict) {
+    NSString* value = param_dict[key];
+    if ([key isEqualToString:kModelFileKey]) {
+      value = FilePathForResourceName(value);
+    }
+    if ([key isEqualToString:kOutputFilePathKey]) {
+      if (![value hasPrefix:kDocumentsPrefix]) {
+        TFLITE_LOG(FATAL) << "Output file must be under the Document directory";
+      }
+      // Replace the prefix "/Documents/" with the actual documents path on the device.
+      NSString* documents = [NSSearchPathForDirectoriesInDomains(
+          NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
+      NSString* relpath = [value substringFromIndex:[kDocumentsPrefix length]];
+      value = [documents stringByAppendingPathComponent:relpath];
+
+      // Create the output directory if necessary.
+      NSString* path = value.stringByDeletingLastPathComponent;
+      if (![[NSFileManager defaultManager] createDirectoryAtPath:path
+                                     withIntermediateDirectories:YES
+                                                      attributes:nil
+                                                           error:nil]) {
+        TFLITE_LOG(FATAL) << "Cannot create output directory: " << [path UTF8String];
+      }
+
+      // Create the output file.
+      std::string output_file_path_ = std::string([value UTF8String]);
+      std::unique_ptr<std::ofstream> output_file_ =
+          std::make_unique<std::ofstream>(output_file_path_, std::ios::out | std::ios::binary);
+      if (!output_file_->is_open()) {
+        TFLITE_LOG(ERROR) << "Cannot open output file: " << output_file_path_;
+      } else {
+        TFLITE_LOG(INFO) << "Create output file: " << output_file_path_;
+      }
+    }
+    params->push_back(FormatCommandLineParam(key, value));
+  }
+}
+
+std::vector<char*> StringVecToCharPtrVec(const std::vector<std::string>& str_vec) {
+  std::vector<char*> charptr_vec;
+  std::transform(str_vec.begin(), str_vec.end(), std::back_inserter(charptr_vec),
+                 [](const std::string& s) -> char* { return const_cast<char*>(s.c_str()); });
+  return charptr_vec;
+}
+
+std::string EvaluationMetricsToString(TfLiteEvaluationMetrics* metrics) {
+  std::ostringstream stream;
+  stream << "Num evaluation runs: " << TfLiteEvaluationMetricsGetNumRuns(metrics);
+  TfLiteEvaluationMetricsLatency ref_latency = TfLiteEvaluationMetricsGetReferenceLatency(metrics);
+  stream << "\nReference run latency: avg=" << ref_latency.avg_us
+         << "(us), std_dev=" << ref_latency.std_deviation_us << "(us)";
+  TfLiteEvaluationMetricsLatency test_latency = TfLiteEvaluationMetricsGetTestLatency(metrics);
+  stream << "\nTest run latency: avg=" << test_latency.avg_us
+         << "(us), std_dev=" << test_latency.std_deviation_us << "(us)";
+  for (int i = 0; i < TfLiteEvaluationMetricsGetOutputErrorCount(metrics); ++i) {
+    TfLiteEvaluationMetricsAccuracy error = TfLiteEvaluationMetricsGetOutputError(metrics, i);
+    stream << "\nOutputDiff[" << i << "]: avg_error=" << error.avg_value
+           << ", std_dev=" << error.std_deviation;
+  }
+
+  return stream.str();
+}
+
+TfLiteEvaluationMetrics* RunEvaluation() {
+  std::vector<std::string> command_line_params;
+  ReadCommandLineParameters(&command_line_params);
+  std::vector<char*> argv = StringVecToCharPtrVec(command_line_params);
+  int argc = static_cast<int>(argv.size());
+  TfLiteEvaluationTask* task = TfLiteEvaluationTaskCreate();
+  return TfLiteEvaluationTaskRunWithArgs(task, argc, argv.data());
+}
+}  // namespace
+
+@interface EvaluationViewController ()
+@end
+
+@implementation EvaluationViewController
+- (IBAction)onEvaluateModel:(UIButton*)sender {
+  TfLiteEvaluationMetrics* metrics = RunEvaluation();
+  [_resultsView setText:[NSString stringWithUTF8String:EvaluationMetricsToString(metrics).c_str()]];
+}
+@end

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/Info.plist

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>UILaunchStoryboardName</key>
+	<string>Main</string>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>arm64</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/evaluation_data/evaluation_params.json

@@ -0,0 +1,8 @@
+{
+    "model_file" : "mobilenet_v2_1.0_224.tflite",
+    "output_file_path" : "/Documents/outputs/inference_diff.txt",
+    "num_runs" : "50",
+    "num_threads" : "1",
+    "num_interpreter_threads" : "1",
+    "delegate" : "coreml"
+}

tensorflow/lite/tools/evaluation/tasks/ios/TFLiteEvaluation/TFLiteEvaluation/main.m

@@ -0,0 +1,26 @@
+// Copyright 2022 The TensorFlow Authors. All Rights Reserved.
+
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <UIKit/UIKit.h>
+#import "AppDelegate.h"
+
+int main(int argc, char* argv[]) {
+  NSString* appDelegateClassName;
+  @autoreleasepool {
+    // Setup code that might create autoreleased objects goes here.
+    appDelegateClassName = NSStringFromClass([AppDelegate class]);
+  }
+  return UIApplicationMain(argc, argv, nil, appDelegateClassName);
+}

tensorflow/lite/tools/evaluation/tasks/ios/build_evaluation_framework.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+# Copyright 2022 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+set -e
+
+WORKSPACE_ROOT=$(bazel info workspace 2> /dev/null)
+EVALUATION_DIR=tensorflow/lite/tools/evaluation/tasks
+DEST_DIR="${EVALUATION_DIR}/ios/TFLiteEvaluation/TFLiteEvaluation/Frameworks"
+FRAMEWORK_TARGET=TensorFlowLiteInferenceDiffC_framework
+
+function usage() {
+  echo "Usage: $(basename "$0")"
+  exit 1
+}
+
+function check_ios_configured() {
+  if [ ! -f "${WORKSPACE_ROOT}/${EVALUATION_DIR}/ios/BUILD" ]; then
+    echo "ERROR: Inference Diff framework BUILD file not found."
+    echo "Please enable iOS support by running the \"./configure\" script" \
+         "from the workspace root."
+    exit 1
+  fi
+}
+
+function build_framework() {
+  set -x
+  pushd "${WORKSPACE_ROOT}"
+
+# Build the framework.
+  bazel build --config=ios_arm64 -c opt --cxxopt=-std=c++17 \
+      "//${EVALUATION_DIR}/ios:${FRAMEWORK_TARGET}"
+
+# Get the generated framework path.
+BAZEL_OUTPUT_FILE_PATH=$(bazel cquery "//${EVALUATION_DIR}/ios:${FRAMEWORK_TARGET}" --config=ios_arm64 --output=starlark --starlark:expr="' '.join([f.path for f in target.files.to_list()])")
+
+# Copy the framework into the destination and unzip.
+  mkdir -p "${DEST_DIR}"
+  cp -f "${BAZEL_OUTPUT_FILE_PATH}" \
+      "${DEST_DIR}"
+  pushd "${DEST_DIR}"
+  unzip -o "${FRAMEWORK_TARGET}.zip"
+  rm -f "${FRAMEWORK_TARGET}.zip"
+
+  popd
+  popd
+}
+
+check_ios_configured
+build_framework