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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
#include <algorithm>
#include <benchmark/benchmark.h>
#include <ranges>
#include <vector>
template <bool aligned>
void bm_ranges_move_vb(benchmark::State& state) {
auto n = state.range();
std::vector<bool> v1(n, true);
std::vector<bool> v2(n, false);
benchmark::DoNotOptimize(v1);
benchmark::DoNotOptimize(v2);
std::vector<bool>* in = &v1;
std::vector<bool>* out = &v2;
for (auto _ : state) {
if constexpr (aligned) {
benchmark::DoNotOptimize(std::ranges::move(*in, std::ranges::begin(*out)));
} else {
benchmark::DoNotOptimize(
std::ranges::move(std::views::counted(in->begin() + 4, n - 4), std::ranges::begin(*out)));
}
std::swap(in, out);
benchmark::DoNotOptimize(in);
benchmark::DoNotOptimize(out);
}
}
template <bool aligned>
void bm_move_vb(benchmark::State& state) {
auto n = state.range();
std::vector<bool> v1(n, true);
std::vector<bool> v2(n, false);
benchmark::DoNotOptimize(v1);
benchmark::DoNotOptimize(v2);
std::vector<bool>* in = &v1;
std::vector<bool>* out = &v2;
for (auto _ : state) {
auto first1 = in->begin();
auto last1 = in->end();
auto first2 = out->begin();
if constexpr (aligned) {
benchmark::DoNotOptimize(std::move(first1, last1, first2));
} else {
benchmark::DoNotOptimize(std::move(first1 + 4, last1, first2));
}
std::swap(in, out);
benchmark::DoNotOptimize(in);
benchmark::DoNotOptimize(out);
}
}
BENCHMARK(bm_ranges_move_vb<true>)
->Name("bm_ranges_move_vb_aligned")
->Range(8, 1 << 16)
->DenseRange(102400, 204800, 4096);
BENCHMARK(bm_ranges_move_vb<false>)->Name("bm_ranges_move_vb_unaligned")->Range(8, 1 << 20);
BENCHMARK(bm_move_vb<true>)->Name("bm_move_vb_aligned")->Range(8, 1 << 20);
BENCHMARK(bm_move_vb<false>)->Name("bm_move_vb_unaligned")->Range(8, 1 << 20);
BENCHMARK_MAIN();
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