Update in-tree Google Benchmark to current ToT.

I've put some work into the Google Benchmark library in order to make it easier
to benchmark libc++. These changes have already been upstreamed into
Google Benchmark and this patch applies the changes to the in-tree version.

The main improvement in the addition of a 'compare_bench.py' script which
makes it very easy to compare benchmarks. For example to compare the native
STL to libc++ you would run:

`$ compare_bench.py ./util_smartptr.native.out ./util_smartptr.libcxx.out`

And the output would look like:

RUNNING: ./util_smartptr.native.out
Benchmark                          Time           CPU Iterations
----------------------------------------------------------------
BM_SharedPtrCreateDestroy         62 ns         62 ns   10937500
BM_SharedPtrIncDecRef             31 ns         31 ns   23972603
BM_WeakPtrIncDecRef               28 ns         28 ns   23648649
RUNNING: ./util_smartptr.libcxx.out
Benchmark                          Time           CPU Iterations
----------------------------------------------------------------
BM_SharedPtrCreateDestroy         46 ns         46 ns   14957265
BM_SharedPtrIncDecRef             31 ns         31 ns   22435897
BM_WeakPtrIncDecRef               34 ns         34 ns   21084337
Comparing ./util_smartptr.native.out to ./util_smartptr.libcxx.out
Benchmark                          Time           CPU
-----------------------------------------------------
BM_SharedPtrCreateDestroy         -0.26         -0.26
BM_SharedPtrIncDecRef             +0.00         +0.00
BM_WeakPtrIncDecRef               +0.21         +0.21

llvm-svn: 278147

4 files changed, 15 insertions, 10 deletions

diff --git a/libcxx/benchmarks/CMakeLists.txt b/libcxx/benchmarks/CMakeLists.txt
index 1adbf6f96e2..a1bc362963a 100644
--- a/libcxx/benchmarks/CMakeLists.txt
+++ b/libcxx/benchmarks/CMakeLists.txt
@@ -87,7 +87,12 @@ macro(add_benchmark_test name source_file)
   add_executable(${libcxx_target} EXCLUDE_FROM_ALL ${source_file})
   add_dependencies(${libcxx_target} cxx google-benchmark-libcxx)
   add_dependencies(libcxx-benchmarks ${libcxx_target})
-  target_link_libraries(${libcxx_target} cxx -lbenchmark)
+  if (LIBCXX_ENABLE_SHARED)
+    target_link_libraries(${libcxx_target} cxx_shared)
+  else()
+    target_link_libraries(${libcxx_target} cxx_static)
+  endif()
+  target_link_libraries(${libcxx_target} -lbenchmark)
   set_target_properties(${libcxx_target}
     PROPERTIES
           OUTPUT_NAME "${name}.libcxx.out"
diff --git a/libcxx/benchmarks/ContainerBenchmarks.hpp b/libcxx/benchmarks/ContainerBenchmarks.hpp
index 6350e6b013c..973a135f70d 100644
--- a/libcxx/benchmarks/ContainerBenchmarks.hpp
+++ b/libcxx/benchmarks/ContainerBenchmarks.hpp
@@ -10,7 +10,7 @@ namespace ContainerBenchmarks {
 
 template <class Container, class GenInputs>
 void BM_ConstructIterIter(benchmark::State& st, Container, GenInputs gen) {
-    auto in = gen(st.range_x());
+    auto in = gen(st.range(0));
     const auto end = in.end();
     benchmark::DoNotOptimize(&in);
     while (st.KeepRunning()) {
@@ -21,7 +21,7 @@ void BM_ConstructIterIter(benchmark::State& st, Container, GenInputs gen) {
 
 template <class Container, class GenInputs>
 void BM_InsertValue(benchmark::State& st, Container c, GenInputs gen) {
-    auto in = gen(st.range_x());
+    auto in = gen(st.range(0));
     const auto end = in.end();
     while (st.KeepRunning()) {
         c.clear();
@@ -34,7 +34,7 @@ void BM_InsertValue(benchmark::State& st, Container c, GenInputs gen) {
 
 template <class Container, class GenInputs>
 void BM_InsertValueRehash(benchmark::State& st, Container c, GenInputs gen) {
-    auto in = gen(st.range_x());
+    auto in = gen(st.range(0));
     const auto end = in.end();
     while (st.KeepRunning()) {
         c.clear();
@@ -49,7 +49,7 @@ void BM_InsertValueRehash(benchmark::State& st, Container c, GenInputs gen) {
 
 template <class Container, class GenInputs>
 void BM_InsertDuplicate(benchmark::State& st, Container c, GenInputs gen) {
-    auto in = gen(st.range_x());
+    auto in = gen(st.range(0));
     const auto end = in.end();
     c.insert(in.begin(), in.end());
     benchmark::DoNotOptimize(&c);
@@ -65,7 +65,7 @@ void BM_InsertDuplicate(benchmark::State& st, Container c, GenInputs gen) {
 
 template <class Container, class GenInputs>
 void BM_EmplaceDuplicate(benchmark::State& st, Container c, GenInputs gen) {
-    auto in = gen(st.range_x());
+    auto in = gen(st.range(0));
     const auto end = in.end();
     c.insert(in.begin(), in.end());
     benchmark::DoNotOptimize(&c);
@@ -80,7 +80,7 @@ void BM_EmplaceDuplicate(benchmark::State& st, Container c, GenInputs gen) {
 
 template <class Container, class GenInputs>
 static void BM_Find(benchmark::State& st, Container c, GenInputs gen) {
-    auto in = gen(st.range_x());
+    auto in = gen(st.range(0));
     c.insert(in.begin(), in.end());
     benchmark::DoNotOptimize(&(*c.begin()));
     const auto end = in.data() + in.size();
@@ -95,7 +95,7 @@ static void BM_Find(benchmark::State& st, Container c, GenInputs gen) {
 template <class Container, class GenInputs>
 static void BM_FindRehash(benchmark::State& st, Container c, GenInputs gen) {
     c.rehash(8);
-    auto in = gen(st.range_x());
+    auto in = gen(st.range(0));
     c.insert(in.begin(), in.end());
     benchmark::DoNotOptimize(&(*c.begin()));
     const auto end = in.data() + in.size();
diff --git a/libcxx/benchmarks/algorithms.bench.cpp b/libcxx/benchmarks/algorithms.bench.cpp
index 82ed99223ce..745cc172718 100644
--- a/libcxx/benchmarks/algorithms.bench.cpp
+++ b/libcxx/benchmarks/algorithms.bench.cpp
@@ -10,7 +10,7 @@ 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_x());
+    const auto in = gen(st.range(0));
     std::vector<ValueType> inputs[5];
     auto reset_inputs = [&]() {
         for (auto& C : inputs) {
diff --git a/libcxx/benchmarks/unordered_set_operations.bench.cpp b/libcxx/benchmarks/unordered_set_operations.bench.cpp
index 8c4463865d5..e2afdde56dc 100644
--- a/libcxx/benchmarks/unordered_set_operations.bench.cpp
+++ b/libcxx/benchmarks/unordered_set_operations.bench.cpp
@@ -109,7 +109,7 @@ struct UInt64Hash2 {
 
 template <class HashFn, class GenInputs>
 void BM_Hash(benchmark::State& st, HashFn fn, GenInputs gen) {
-    auto in = gen(st.range_x());
+    auto in = gen(st.range(0));
     const auto end = in.data() + in.size();
     std::size_t last_hash = 0;
     benchmark::DoNotOptimize(&last_hash);