Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/libcxx/benchmarks/algorithms.bench.cpp

@@ -0,0 +1,62 @@
+#include <unordered_set>
+#include <vector>
+#include <cstdint>
+
+#include "benchmark/benchmark_api.h"
+#include "GenerateInput.hpp"
+
+constexpr std::size_t TestNumInputs = 1024;
+
+template <class GenInputs>
+void BM_Sort(benchmark::State& st, GenInputs gen) {
+    using ValueType = typename decltype(gen(0))::value_type;
+    const auto in = gen(st.range(0));
+    std::vector<ValueType> inputs[5];
+    auto reset_inputs = [&]() {
+        for (auto& C : inputs) {
+            C = in;
+            benchmark::DoNotOptimize(C.data());
+        }
+    };
+    reset_inputs();
+    while (st.KeepRunning()) {
+        for (auto& I : inputs) {
+            std::sort(I.data(), I.data() + I.size());
+            benchmark::DoNotOptimize(I.data());
+        }
+        st.PauseTiming();
+        reset_inputs();
+        benchmark::ClobberMemory();
+        st.ResumeTiming();
+    }
+}
+
+BENCHMARK_CAPTURE(BM_Sort, random_uint32,
+    getRandomIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Sort, sorted_ascending_uint32,
+    getSortedIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Sort, sorted_descending_uint32,
+    getReverseSortedIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Sort, single_element_uint32,
+    getDuplicateIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Sort, pipe_organ_uint32,
+    getPipeOrganIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Sort, random_strings,
+    getRandomStringInputs)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Sort, sorted_ascending_strings,
+    getSortedStringInputs)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Sort, sorted_descending_strings,
+    getReverseSortedStringInputs)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Sort, single_element_strings,
+    getDuplicateStringInputs)->Arg(TestNumInputs);
+
+
+BENCHMARK_MAIN()