diff --git a/libcxx/test/benchmarks/exception_ptr.bench.cpp b/libcxx/test/benchmarks/exception_ptr.bench.cpp index 7791c510b1eb6..8ec7488ddf099 100644 --- a/libcxx/test/benchmarks/exception_ptr.bench.cpp +++ b/libcxx/test/benchmarks/exception_ptr.bench.cpp @@ -18,4 +18,116 @@ void bm_make_exception_ptr(benchmark::State& state) { } BENCHMARK(bm_make_exception_ptr)->ThreadRange(1, 8); +void bm_exception_ptr_copy_ctor_nonnull(benchmark::State& state) { + std::exception_ptr excptr = std::make_exception_ptr(42); + for (auto _ : state) { + benchmark::DoNotOptimize(std::exception_ptr(excptr)); + } +} +BENCHMARK(bm_exception_ptr_copy_ctor_nonnull); + +void bm_exception_ptr_copy_ctor_null(benchmark::State& state) { + std::exception_ptr excptr = nullptr; + for (auto _ : state) { + std::exception_ptr excptr_copy(excptr); + // The compiler should be able to constant-fold the comparison + benchmark::DoNotOptimize(excptr_copy == nullptr); + benchmark::DoNotOptimize(excptr_copy); + } +} +BENCHMARK(bm_exception_ptr_copy_ctor_null); + +void bm_exception_ptr_move_ctor_nonnull(benchmark::State& state) { + std::exception_ptr excptr = std::make_exception_ptr(42); + for (auto _ : state) { + // Need to copy, such that the `excptr` is not moved from and + // empty after the first loop iteration. + std::exception_ptr excptr_copy(excptr); + benchmark::DoNotOptimize(std::exception_ptr(std::move(excptr_copy))); + } +} +BENCHMARK(bm_exception_ptr_move_ctor_nonnull); + +void bm_exception_ptr_move_ctor_null(benchmark::State& state) { + std::exception_ptr excptr = nullptr; + for (auto _ : state) { + std::exception_ptr new_excptr(std::move(excptr)); + // The compiler should be able to constant-fold the comparison + benchmark::DoNotOptimize(new_excptr == nullptr); + benchmark::DoNotOptimize(new_excptr); + } +} +BENCHMARK(bm_exception_ptr_move_ctor_null); + +void bm_exception_ptr_copy_assign_nonnull(benchmark::State& state) { + std::exception_ptr excptr = std::make_exception_ptr(42); + for (auto _ : state) { + std::exception_ptr new_excptr; + new_excptr = excptr; + benchmark::DoNotOptimize(new_excptr); + } +} +BENCHMARK(bm_exception_ptr_copy_assign_nonnull); + +void bm_exception_ptr_copy_assign_null(benchmark::State& state) { + std::exception_ptr excptr = nullptr; + for (auto _ : state) { + std::exception_ptr new_excptr; + new_excptr = excptr; + // The compiler should be able to constant-fold the comparison + benchmark::DoNotOptimize(new_excptr == nullptr); + benchmark::DoNotOptimize(new_excptr); + } +} +BENCHMARK(bm_exception_ptr_copy_assign_null); + +void bm_exception_ptr_move_assign_nonnull(benchmark::State& state) { + std::exception_ptr excptr = std::make_exception_ptr(42); + for (auto _ : state) { + // Need to copy, such that the `excptr` is not moved from and + // empty after the first loop iteration. + std::exception_ptr excptr_copy(excptr); + std::exception_ptr new_excptr; + new_excptr = std::move(excptr_copy); + benchmark::DoNotOptimize(new_excptr); + } +} +BENCHMARK(bm_exception_ptr_move_assign_nonnull); + +void bm_exception_ptr_move_assign_null(benchmark::State& state) { + std::exception_ptr excptr = nullptr; + for (auto _ : state) { + std::exception_ptr new_excptr; + new_excptr = std::move(excptr); + // The compiler should be able to constant-fold the comparison + benchmark::DoNotOptimize(new_excptr == nullptr); + benchmark::DoNotOptimize(new_excptr); + } +} +BENCHMARK(bm_exception_ptr_move_assign_null); + +void bm_exception_ptr_swap_nonnull(benchmark::State& state) { + std::exception_ptr excptr1 = std::make_exception_ptr(41); + std::exception_ptr excptr2 = std::make_exception_ptr(42); + for (auto _ : state) { + swap(excptr1, excptr2); + benchmark::DoNotOptimize(excptr1); + benchmark::DoNotOptimize(excptr2); + } +} +BENCHMARK(bm_exception_ptr_swap_nonnull); + +void bm_exception_ptr_swap_null(benchmark::State& state) { + std::exception_ptr excptr1 = nullptr; + std::exception_ptr excptr2 = nullptr; + for (auto _ : state) { + swap(excptr1, excptr2); + // The compiler should be able to constant-fold those comparisons + benchmark::DoNotOptimize(excptr1 == nullptr); + benchmark::DoNotOptimize(excptr2 == nullptr); + benchmark::DoNotOptimize(excptr1 == excptr2); + } +} +BENCHMARK(bm_exception_ptr_swap_null); + BENCHMARK_MAIN();