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Reapply "[libc++][ranges] Add benchmarks for the from_range constructors of vector and deque." (#67753)

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This reverts commit 10edd5d943 and guards
against older versions of GCC to work around the problem.
This commit is contained in:
Konstantin Varlamov
2023-09-29 07:27:20 -07:00
committed by GitHub
parent ec9d80ec43
commit dd788af74a
4 changed files with 49 additions and 1 deletions
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22
libcxx/benchmarks/CMakeLists.txt
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@@ -76,7 +76,27 @@ set(BENCHMARK_LIBCXX_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/benchmark-libcxx)
set(BENCHMARK_NATIVE_INSTALL ${CMAKE_CURRENT_BINARY_DIR}/benchmark-native)
add_library( cxx-benchmarks-flags INTERFACE)
target_compile_features( cxx-benchmarks-flags INTERFACE cxx_std_20)
# TODO(cmake): remove. This is a workaround to prevent older versions of GCC
# from failing the configure step because they don't support C++23.
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "13.0")
return()
endif()
#TODO(cmake): remove the `add_compile_options`. Currently we have to explicitly
# pass the `std:c++latest` flag on Windows to work around an issue where
# requesting `cxx_std_23` results in an error -- somehow CMake fails to
# translate the `c++23` flag into `c++latest`, and the highest numbered C++
# version that MSVC flags support is C++20.
if (MSVC)
add_compile_options(/std:c++latest)
# ibm-clang does not recognize the cxx_std_23 flag, so use this as a temporary
# workaround on AIX as well.
elseif (${CMAKE_SYSTEM_NAME} MATCHES "AIX")
add_compile_options(-std=c++23)
else()
target_compile_features( cxx-benchmarks-flags INTERFACE cxx_std_23)
endif()
target_compile_options( cxx-benchmarks-flags INTERFACE -fsized-deallocation -nostdinc++)
target_include_directories(cxx-benchmarks-flags INTERFACE "${LIBCXX_GENERATED_INCLUDE_DIR}"
INTERFACE "${BENCHMARK_LIBCXX_INSTALL}/include"

10
libcxx/benchmarks/ContainerBenchmarks.h
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@@ -69,6 +69,16 @@ void BM_ConstructIterIter(benchmark::State& st, Container, GenInputs gen) {
}
}
template <class Container, class GenInputs>
void BM_ConstructFromRange(benchmark::State& st, Container, GenInputs gen) {
auto in = gen(st.range(0));
benchmark::DoNotOptimize(&in);
while (st.KeepRunning()) {
Container c(std::from_range, in);
DoNotOptimizeData(c);
}
}
template <class Container, class GenInputs>
void BM_InsertValue(benchmark::State& st, Container c, GenInputs gen) {
auto in = gen(st.range(0));

9
libcxx/benchmarks/deque.bench.cpp
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@@ -30,4 +30,13 @@ BENCHMARK_CAPTURE(BM_ConstructIterIter, deque_size_t, std::deque<size_t>{}, getR
BENCHMARK_CAPTURE(BM_ConstructIterIter, deque_string, std::deque<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_ConstructFromRange, deque_char, std::deque<char>{}, getRandomIntegerInputs<char>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_ConstructFromRange, deque_size_t, std::deque<size_t>{}, getRandomIntegerInputs<size_t>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_ConstructFromRange, deque_string, std::deque<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_MAIN();

9
libcxx/benchmarks/vector_operations.bench.cpp
View File

@@ -30,4 +30,13 @@ BENCHMARK_CAPTURE(BM_ConstructIterIter, vector_size_t, std::vector<size_t>{}, ge
BENCHMARK_CAPTURE(BM_ConstructIterIter, vector_string, std::vector<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_ConstructFromRange, vector_char, std::vector<char>{}, getRandomIntegerInputs<char>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_ConstructFromRange, vector_size_t, std::vector<size_t>{}, getRandomIntegerInputs<size_t>)
->Arg(TestNumInputs);
BENCHMARK_CAPTURE(BM_ConstructFromRange, vector_string, std::vector<std::string>{}, getRandomStringInputs)
->Arg(TestNumInputs);
BENCHMARK_MAIN();