Export of internal Abseil changes.

--
0925eb11f7730d5a1e538b9e6c2d1f8239f5fdc0 by Abseil Team <absl-team@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 250694613

--
4e1690e492a8399da1b1450ff5f21adf435fcef5 by Greg Falcon <gfalcon@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 250684222

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c7281b44eb005c21d45bdc0b437e47c7787275bc by Derek Mauro <dmauro@google.com>:

Fix warnings on Xcode/clang.

PiperOrigin-RevId: 250552120

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5ea3b1cfa759a7e6c70e7558f27c762baf818f7d by CJ Johnson <johnsoncj@google.com>:

Minor edits to InlinedVector benchmarks: Adds DoNotOptimize to the member functions of NontrivialType, removes unused template parameter for InlVec typeder

PiperOrigin-RevId: 250505482

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7fe9c02b49121936c5b47034f20272a916111174 by Matt Kulukundis <kfm@google.com>:

Internal change.

PiperOrigin-RevId: 250376825

--
ad348c9c0eb37449874648e8544c56343c1dfaef by CJ Johnson <johnsoncj@google.com>:

Minor edits to InlinedVector benchmark

PiperOrigin-RevId: 250361830

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55e8b411431e982059af73b160fa6bcef90e87f7 by CJ Johnson <johnsoncj@google.com>:

Switches use of allocator_traits to the Abseil backport to leverage existing bug fixes and workarounds

PiperOrigin-RevId: 250359321

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b0edbe3218940128523e36388a31ff90df01a364 by CJ Johnson <johnsoncj@google.com>:

Updates exception safety test for InlinedVector to use TYPED_TEST (with fixtures) which increases the coverage without complicating the code.

PiperOrigin-RevId: 250359198

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8ab55c9a8c191aabcb562cf1789f360eba0b1a81 by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 250281509

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dd8a67f4f9e5e8930457203c18205183b8306b5a by Abseil Team <absl-team@google.com>:

Change the suggestions for the non-strict Next/PrevWeekday() calls.

Previously we suggested `PrevWeekday(d, Weekday::thursday) + 7`
to get the _following_ Thursday if d is not already a Thursday,
but `NextWeekday(d - 1, Weekday::thursday)` is more intuitive,
and probably even a little faster.

Similarly for the _previous_ Thursday if d is not already a
Thursday, suggest `PrevWeekday(d + 1, Weekday::thursday)`
instead of `NextWeekday(d, Weekday::thursday) - 7`.

PiperOrigin-RevId: 249840844

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4775dce26cdb0560011a5d1ecdc8e0c20f856911 by Abseil Team <absl-team@google.com>:

Change the DbgHelp lib pragma to use lowercase and an extension.

This matches the conventions used in the Windows SDK.

PiperOrigin-RevId: 249826229

--
cbc49e865f3715ebe1983307d4f02e50998b2958 by Abseil Team <absl-team@google.com>:

Introduce Abseil prefixed thread annotation macros.

PiperOrigin-RevId: 249825200

--
8e97c8dfbadb78743c2421b494398be25f632cb1 by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 249737936

--
0d720538bc6af3e77ac19def27a4a0514c2800d2 by Abseil Team <absl-team@google.com>:

Tell CMake Abseil is a C++ project.

PiperOrigin-RevId: 249726509

--
20651845edf236757b3ffb3eaeff330af81be40a by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 249726377
GitOrigin-RevId: 0925eb11f7730d5a1e538b9e6c2d1f8239f5fdc0
Change-Id: I05d18d30ad4e9ace6b60a17d2dc6fd699643fe30

1 files changed, 32 insertions, 27 deletions

diff --git a/absl/container/inlined_vector_benchmark.cc b/absl/container/inlined_vector_benchmark.cc
index d906997a..b57fc1de 100644
--- a/absl/container/inlined_vector_benchmark.cc
+++ b/absl/container/inlined_vector_benchmark.cc
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include <array>
 #include <string>
 #include <vector>
 
@@ -373,71 +374,75 @@ void BM_StdVectorEmpty(benchmark::State& state) {
 }
 BENCHMARK(BM_StdVectorEmpty);
 
-constexpr size_t kInlineElements = 4;
-constexpr size_t kSmallSize = kInlineElements / 2;
-constexpr size_t kLargeSize = kInlineElements * 2;
+constexpr size_t kInlinedCapacity = 4;
+constexpr size_t kLargeSize = kInlinedCapacity * 2;
+constexpr size_t kSmallSize = kInlinedCapacity / 2;
 constexpr size_t kBatchSize = 100;
 
+template <typename T>
+using InlVec = absl::InlinedVector<T, kInlinedCapacity>;
+
 struct TrivialType {
   size_t val;
 };
 
-using TrivialVec = absl::InlinedVector<TrivialType, kInlineElements>;
-
 class NontrivialType {
  public:
-  ABSL_ATTRIBUTE_NOINLINE NontrivialType() : val_() {}
+  ABSL_ATTRIBUTE_NOINLINE NontrivialType() : val_() {
+    benchmark::DoNotOptimize(*this);
+  }
 
   ABSL_ATTRIBUTE_NOINLINE NontrivialType(const NontrivialType& other)
-      : val_(other.val_) {}
+      : val_(other.val_) {
+    benchmark::DoNotOptimize(*this);
+  }
 
   ABSL_ATTRIBUTE_NOINLINE NontrivialType& operator=(
       const NontrivialType& other) {
     val_ = other.val_;
+    benchmark::DoNotOptimize(*this);
     return *this;
   }
 
-  ABSL_ATTRIBUTE_NOINLINE ~NontrivialType() noexcept {}
+  ABSL_ATTRIBUTE_NOINLINE ~NontrivialType() noexcept {
+    benchmark::DoNotOptimize(*this);
+  }
 
  private:
   size_t val_;
 };
 
-using NontrivialVec = absl::InlinedVector<NontrivialType, kInlineElements>;
-
-template <typename VecT, typename PrepareVec, typename TestVec>
-void BatchedBenchmark(benchmark::State& state, PrepareVec prepare_vec,
-                      TestVec test_vec) {
-  VecT vectors[kBatchSize];
+template <typename T, typename PrepareVecFn, typename TestVecFn>
+void BatchedBenchmark(benchmark::State& state, PrepareVecFn prepare_vec,
+                      TestVecFn test_vec) {
+  std::array<InlVec<T>, kBatchSize> vector_batch{};
 
   while (state.KeepRunningBatch(kBatchSize)) {
     // Prepare batch
     state.PauseTiming();
-    for (auto& vec : vectors) {
+    for (auto& vec : vector_batch) {
       prepare_vec(&vec);
     }
-    benchmark::DoNotOptimize(vectors);
+    benchmark::DoNotOptimize(vector_batch);
     state.ResumeTiming();
 
     // Test batch
-    for (auto& vec : vectors) {
+    for (auto& vec : vector_batch) {
       test_vec(&vec);
     }
   }
 }
 
-template <typename VecT, size_t FromSize>
+template <typename T, size_t FromSize>
 void BM_Clear(benchmark::State& state) {
-  BatchedBenchmark<VecT>(
+  BatchedBenchmark<T>(
       state,
-      /* prepare_vec = */ [](VecT* vec) { vec->resize(FromSize); },
-      /* test_vec = */ [](VecT* vec) { vec->clear(); });
+      /* prepare_vec = */ [](InlVec<T>* vec) { vec->resize(FromSize); },
+      /* test_vec = */ [](InlVec<T>* vec) { vec->clear(); });
 }
-
-BENCHMARK_TEMPLATE(BM_Clear, TrivialVec, kSmallSize);
-BENCHMARK_TEMPLATE(BM_Clear, TrivialVec, kLargeSize);
-
-BENCHMARK_TEMPLATE(BM_Clear, NontrivialVec, kSmallSize);
-BENCHMARK_TEMPLATE(BM_Clear, NontrivialVec, kLargeSize);
+BENCHMARK_TEMPLATE(BM_Clear, TrivialType, kLargeSize);
+BENCHMARK_TEMPLATE(BM_Clear, TrivialType, kSmallSize);
+BENCHMARK_TEMPLATE(BM_Clear, NontrivialType, kLargeSize);
+BENCHMARK_TEMPLATE(BM_Clear, NontrivialType, kSmallSize);
 
 }  // namespace