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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
#include <algorithm>
#include <benchmark/benchmark.h>
#include <vector>
static void bm_ranges_swap_ranges_vb_aligned(benchmark::State& state) {
auto n = state.range();
std::vector<bool> vec1(n, true);
std::vector<bool> vec2(n, false);
for (auto _ : state) {
benchmark::DoNotOptimize(std::ranges::swap_ranges(vec1, vec2));
benchmark::DoNotOptimize(&vec1);
benchmark::DoNotOptimize(&vec2);
}
}
static void bm_ranges_swap_ranges_vb_unaligned(benchmark::State& state) {
auto n = state.range();
std::vector<bool> vec1(n, true);
std::vector<bool> vec2(n + 8, true);
auto beg1 = std::ranges::begin(vec1);
auto end1 = std::ranges::end(vec1);
auto beg2 = std::ranges::begin(vec2) + 4;
auto end2 = std::ranges::end(vec2) - 4;
for (auto _ : state) {
benchmark::DoNotOptimize(std::ranges::swap_ranges(beg1, end1, beg2, end2));
benchmark::DoNotOptimize(&vec1);
benchmark::DoNotOptimize(&vec2);
}
}
// Test std::ranges::swap_ranges for vector<bool>::iterator
BENCHMARK(bm_ranges_swap_ranges_vb_aligned)->RangeMultiplier(2)->Range(8, 1 << 20);
BENCHMARK(bm_ranges_swap_ranges_vb_unaligned)->Range(8, 1 << 20);
static void bm_swap_ranges_vb(benchmark::State& state, bool aligned) {
auto n = state.range();
std::vector<bool> vec1(n, true);
std::vector<bool> vec2(aligned ? n : n + 8, true);
auto beg1 = vec1.begin();
auto end1 = vec1.end();
auto beg2 = aligned ? vec2.begin() : vec2.begin() + 4;
for (auto _ : state) {
benchmark::DoNotOptimize(std::swap_ranges(beg1, end1, beg2));
benchmark::DoNotOptimize(&vec1);
benchmark::DoNotOptimize(&vec2);
}
}
static void bm_swap_ranges_vb_aligned(benchmark::State& state) { bm_swap_ranges_vb(state, true); }
static void bm_swap_ranges_vb_unaligned(benchmark::State& state) { bm_swap_ranges_vb(state, false); }
// Test std::swap_ranges for vector<bool>::iterator
BENCHMARK(bm_swap_ranges_vb_aligned)->Range(8, 1 << 20);
BENCHMARK(bm_swap_ranges_vb_unaligned)->Range(8, 1 << 20);
BENCHMARK_MAIN();
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