xref: /aosp_15_r20/bionic/tests/DoNotOptimize.h (revision 8d67ca893c1523eb926b9080dbe4e2ffd2a27ba1)

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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.
 */

#pragma once

// From <benchmark/benchmark.h>.
template <class Tp>
static inline void DoNotOptimize(Tp const& value) {
  asm volatile("" : : "r,m"(value) : "memory");
}
template <class Tp>
static inline void DoNotOptimize(Tp& value) {
  asm volatile("" : "+r,m"(value) : : "memory");
}