Import libc++ 8.0.0.

1 files changed, 249 insertions, 0 deletions

diff --git a/lib/libcxx/benchmarks/ordered_set.bench.cpp b/lib/libcxx/benchmarks/ordered_set.bench.cpp
new file mode 100644
index 00000000000..b2ef0725b7b
--- /dev/null
+++ b/lib/libcxx/benchmarks/ordered_set.bench.cpp
@@ -0,0 +1,249 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include <algorithm>
+#include <cstdint>
+#include <memory>
+#include <random>
+#include <set>
+#include <string>
+#include <vector>
+
+#include "CartesianBenchmarks.hpp"
+#include "benchmark/benchmark.h"
+#include "test_macros.h"
+
+namespace {
+
+enum class HitType { Hit, Miss };
+
+struct AllHitTypes : EnumValuesAsTuple<AllHitTypes, HitType, 2> {
+  static constexpr const char* Names[] = {"Hit", "Miss"};
+};
+
+enum class AccessPattern { Ordered, Random };
+
+struct AllAccessPattern
+    : EnumValuesAsTuple<AllAccessPattern, AccessPattern, 2> {
+  static constexpr const char* Names[] = {"Ordered", "Random"};
+};
+
+void sortKeysBy(std::vector<uint64_t>& Keys, AccessPattern AP) {
+  if (AP == AccessPattern::Random) {
+    std::random_device R;
+    std::mt19937 M(R());
+    std::shuffle(std::begin(Keys), std::end(Keys), M);
+  }
+}
+
+struct TestSets {
+  std::vector<std::set<uint64_t> > Sets;
+  std::vector<uint64_t> Keys;
+};
+
+TestSets makeTestingSets(size_t TableSize, size_t NumTables, HitType Hit,
+                         AccessPattern Access) {
+  TestSets R;
+  R.Sets.resize(1);
+
+  for (uint64_t I = 0; I < TableSize; ++I) {
+    R.Sets[0].insert(2 * I);
+    R.Keys.push_back(Hit == HitType::Hit ? 2 * I : 2 * I + 1);
+  }
+  R.Sets.resize(NumTables, R.Sets[0]);
+  sortKeysBy(R.Keys, Access);
+
+  return R;
+}
+
+struct Base {
+  size_t TableSize;
+  size_t NumTables;
+  Base(size_t T, size_t N) : TableSize(T), NumTables(N) {}
+
+  bool skip() const {
+    size_t Total = TableSize * NumTables;
+    return Total < 100 || Total > 1000000;
+  }
+
+  std::string baseName() const {
+    return "_TableSize" + std::to_string(TableSize) + "_NumTables" +
+           std::to_string(NumTables);
+  }
+};
+
+template <class Access>
+struct Create : Base {
+  using Base::Base;
+
+  void run(benchmark::State& State) const {
+    std::vector<uint64_t> Keys(TableSize);
+    std::iota(Keys.begin(), Keys.end(), uint64_t{0});
+    sortKeysBy(Keys, Access());
+
+    while (State.KeepRunningBatch(TableSize * NumTables)) {
+      std::vector<std::set<uint64_t>> Sets(NumTables);
+      for (auto K : Keys) {
+        for (auto& Set : Sets) {
+          benchmark::DoNotOptimize(Set.insert(K));
+        }
+      }
+    }
+  }
+
+  std::string name() const {
+    return "BM_Create" + Access::name() + baseName();
+  }
+};
+
+template <class Hit, class Access>
+struct Find : Base {
+  using Base::Base;
+
+  void run(benchmark::State& State) const {
+    auto Data = makeTestingSets(TableSize, NumTables, Hit(), Access());
+
+    while (State.KeepRunningBatch(TableSize * NumTables)) {
+      for (auto K : Data.Keys) {
+        for (auto& Set : Data.Sets) {
+          benchmark::DoNotOptimize(Set.find(K));
+        }
+      }
+    }
+  }
+
+  std::string name() const {
+    return "BM_Find" + Hit::name() + Access::name() + baseName();
+  }
+};
+
+template <class Hit, class Access>
+struct FindNeEnd : Base {
+  using Base::Base;
+
+  void run(benchmark::State& State) const {
+    auto Data = makeTestingSets(TableSize, NumTables, Hit(), Access());
+
+    while (State.KeepRunningBatch(TableSize * NumTables)) {
+      for (auto K : Data.Keys) {
+        for (auto& Set : Data.Sets) {
+          benchmark::DoNotOptimize(Set.find(K) != Set.end());
+        }
+      }
+    }
+  }
+
+  std::string name() const {
+    return "BM_FindNeEnd" + Hit::name() + Access::name() + baseName();
+  }
+};
+
+template <class Access>
+struct InsertHit : Base {
+  using Base::Base;
+
+  void run(benchmark::State& State) const {
+    auto Data = makeTestingSets(TableSize, NumTables, HitType::Hit, Access());
+
+    while (State.KeepRunningBatch(TableSize * NumTables)) {
+      for (auto K : Data.Keys) {
+        for (auto& Set : Data.Sets) {
+          benchmark::DoNotOptimize(Set.insert(K));
+        }
+      }
+    }
+  }
+
+  std::string name() const {
+    return "BM_InsertHit" + Access::name() + baseName();
+  }
+};
+
+template <class Access>
+struct InsertMissAndErase : Base {
+  using Base::Base;
+
+  void run(benchmark::State& State) const {
+    auto Data = makeTestingSets(TableSize, NumTables, HitType::Miss, Access());
+
+    while (State.KeepRunningBatch(TableSize * NumTables)) {
+      for (auto K : Data.Keys) {
+        for (auto& Set : Data.Sets) {
+          benchmark::DoNotOptimize(Set.erase(Set.insert(K).first));
+        }
+      }
+    }
+  }
+
+  std::string name() const {
+    return "BM_InsertMissAndErase" + Access::name() + baseName();
+  }
+};
+
+struct IterateRangeFor : Base {
+  using Base::Base;
+
+  void run(benchmark::State& State) const {
+    auto Data = makeTestingSets(TableSize, NumTables, HitType::Miss,
+                                AccessPattern::Ordered);
+
+    while (State.KeepRunningBatch(TableSize * NumTables)) {
+      for (auto& Set : Data.Sets) {
+        for (auto& V : Set) {
+          benchmark::DoNotOptimize(V);
+        }
+      }
+    }
+  }
+
+  std::string name() const { return "BM_IterateRangeFor" + baseName(); }
+};
+
+struct IterateBeginEnd : Base {
+  using Base::Base;
+
+  void run(benchmark::State& State) const {
+    auto Data = makeTestingSets(TableSize, NumTables, HitType::Miss,
+                                AccessPattern::Ordered);
+
+    while (State.KeepRunningBatch(TableSize * NumTables)) {
+      for (auto& Set : Data.Sets) {
+        for (auto it = Set.begin(); it != Set.end(); ++it) {
+          benchmark::DoNotOptimize(*it);
+        }
+      }
+    }
+  }
+
+  std::string name() const { return "BM_IterateBeginEnd" + baseName(); }
+};
+
+}  // namespace
+
+int main(int argc, char** argv) {
+  benchmark::Initialize(&argc, argv);
+  if (benchmark::ReportUnrecognizedArguments(argc, argv))
+    return 1;
+
+  const std::vector<size_t> TableSize{1, 10, 100, 1000, 10000, 100000, 1000000};
+  const std::vector<size_t> NumTables{1, 10, 100, 1000, 10000, 100000, 1000000};
+
+  makeCartesianProductBenchmark<Create, AllAccessPattern>(TableSize, NumTables);
+  makeCartesianProductBenchmark<Find, AllHitTypes, AllAccessPattern>(
+      TableSize, NumTables);
+  makeCartesianProductBenchmark<FindNeEnd, AllHitTypes, AllAccessPattern>(
+      TableSize, NumTables);
+  makeCartesianProductBenchmark<InsertHit, AllAccessPattern>(
+      TableSize, NumTables);
+  makeCartesianProductBenchmark<InsertMissAndErase, AllAccessPattern>(
+      TableSize, NumTables);
+  makeCartesianProductBenchmark<IterateRangeFor>(TableSize, NumTables);
+  makeCartesianProductBenchmark<IterateBeginEnd>(TableSize, NumTables);
+  benchmark::RunSpecifiedBenchmarks();
+}