1 /*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #pragma once
18
19 // From <benchmark/benchmark.h>.
20 template <class Tp>
DoNotOptimize(Tp const & value)21 static inline void DoNotOptimize(Tp const& value) {
22 asm volatile("" : : "r,m"(value) : "memory");
23 }
24 template <class Tp>
DoNotOptimize(Tp & value)25 static inline void DoNotOptimize(Tp& value) {
26 asm volatile("" : "+r,m"(value) : : "memory");
27 }
28