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b2d2494731
This patch fixes warnings and errors that come up when running the benchmarks as part of the test suite. It also adds the necessary Lit annotations to make it pass in various configurations and increases the portability of the benchmarks.
56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef BENCHMARK_VARIANT_BENCHMARKS_H
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#define BENCHMARK_VARIANT_BENCHMARKS_H
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#include <array>
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#include <cstddef>
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#include <tuple>
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#include <type_traits>
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#include <variant>
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#include "benchmark/benchmark.h"
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#include "GenerateInput.h"
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namespace VariantBenchmarks {
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template <std::size_t I>
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struct S {
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static constexpr size_t v = I;
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};
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template <std::size_t N, std::size_t... Is>
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static auto genVariants(std::index_sequence<Is...>) {
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using V = std::variant<S<Is>...>;
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using F = V (*)();
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static constexpr F fs[] = {[] { return V(std::in_place_index<Is>); }...};
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std::array<V, N> result = {};
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for (auto& v : result) {
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v = fs[getRandomInteger(std::size_t(0), sizeof...(Is) - 1)]();
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}
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return result;
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}
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template <std::size_t N, std::size_t Alts>
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static void BM_Visit(benchmark::State& state) {
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auto args = genVariants<N>(std::make_index_sequence<Alts>{});
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for (auto _ : state) {
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benchmark::DoNotOptimize(
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std::apply([](auto... vs) { return std::visit([](auto... is) { return (is.v + ... + 0); }, vs...); }, args));
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}
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}
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} // namespace VariantBenchmarks
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#endif // BENCHMARK_VARIANT_BENCHMARKS_H
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