Import libc++ 10.0.1 release.

1 files changed, 41 insertions, 0 deletions

diff --git a/gnu/llvm/libcxx/benchmarks/util_smartptr.bench.cpp b/gnu/llvm/libcxx/benchmarks/util_smartptr.bench.cpp
new file mode 100644
index 00000000000..053cbd659be
--- /dev/null
+++ b/gnu/llvm/libcxx/benchmarks/util_smartptr.bench.cpp
@@ -0,0 +1,41 @@
+//===----------------------------------------------------------------------===//
+//
+// 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 <memory>
+
+#include "benchmark/benchmark.h"
+
+static void BM_SharedPtrCreateDestroy(benchmark::State& st) {
+  while (st.KeepRunning()) {
+    auto sp = std::make_shared<int>(42);
+    benchmark::DoNotOptimize(sp.get());
+  }
+}
+BENCHMARK(BM_SharedPtrCreateDestroy);
+
+static void BM_SharedPtrIncDecRef(benchmark::State& st) {
+  auto sp = std::make_shared<int>(42);
+  benchmark::DoNotOptimize(sp.get());
+  while (st.KeepRunning()) {
+    std::shared_ptr<int> sp2(sp);
+    benchmark::ClobberMemory();
+  }
+}
+BENCHMARK(BM_SharedPtrIncDecRef);
+
+static void BM_WeakPtrIncDecRef(benchmark::State& st) {
+  auto sp = std::make_shared<int>(42);
+  benchmark::DoNotOptimize(sp.get());
+  while (st.KeepRunning()) {
+    std::weak_ptr<int> wp(sp);
+    benchmark::ClobberMemory();
+  }
+}
+BENCHMARK(BM_WeakPtrIncDecRef);
+
+BENCHMARK_MAIN();