Initial commit

module/jni/libcxx/benchmarks/algorithms/lower_bound.bench.cpp

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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
+//
+//===----------------------------------------------------------------------===//
+
+#include <algorithm>
+#include <numeric>
+#include <random>
+#include <vector>
+
+#include "common.h"
+
+namespace {
+template <class ValueType>
+struct LowerBound {
+  size_t Quantity;
+
+  mutable std::mt19937_64 rng { std::random_device{}() };
+
+  void run(benchmark::State& state) const {
+    runOpOnCopies<ValueType>(state, Quantity, Order::Ascending, BatchSize::CountBatch, [&](auto& Copy) {
+      auto result = std::lower_bound(Copy.begin(), Copy.end(), Copy[rng() % Copy.size()]);
+      benchmark::DoNotOptimize(result);
+    });
+  }
+
+  std::string name() const {
+    return "BM_LowerBound" + ValueType::name() + "_" + std::to_string(Quantity);
+  }
+};
+} // namespace
+
+int main(int argc, char** argv) {
+  benchmark::Initialize(&argc, argv);
+  if (benchmark::ReportUnrecognizedArguments(argc, argv))
+    return 1;
+  makeCartesianProductBenchmark<LowerBound, AllValueTypes>(Quantities);
+  benchmark::RunSpecifiedBenchmarks();
+}