Only build the section of flag_benchmark used for viewing the

disassembly under LLVM. Due to the issue described in
https://github.com/abseil/abseil-cpp/issues/1340 and
https://github.com/google/benchmark/commit/8545dfb3ea301f5c77626a046d4756ef9f2e4970
it no longer builds under GCC.

The other changes are necessary to fix the build using the latest benchmark snapshot

Fixes #1340

PiperOrigin-RevId: 494809290
Change-Id: I4a03b2e2dcbdc273e59f1f09f204322e388e7cea

WORKSPACE

@@ -39,10 +39,10 @@ http_archive(
 
 # Google benchmark.
 http_archive(
-    name = "com_github_google_benchmark",  # 2021-09-20T09:19:51Z
-    sha256 = "62e2f2e6d8a744d67e4bbc212fcfd06647080de4253c97ad5c6749e09faf2cb0",
-    strip_prefix = "benchmark-0baacde3618ca617da95375e0af13ce1baadea47",
-    urls = ["https://github.com/google/benchmark/archive/0baacde3618ca617da95375e0af13ce1baadea47.zip"],
+    name = "com_github_google_benchmark",  # 2022-12-10T23:42:44Z
+    sha256 = "a62735f4f4bebc069225aa725dc68eb6836dcdbf550424b5f18e2673e7d40f2c",
+    strip_prefix = "benchmark-da652a748675b679947710117329e9f77f374f2d",
+    urls = ["https://github.com/google/benchmark/archive/da652a748675b679947710117329e9f77f374f2d.zip"],
 )
 
 # Bazel Skylib.

absl/flags/flag_benchmark.cc

@@ -241,10 +241,11 @@ BENCHMARK(BM_ThreadedFindCommandLineFlag)->ThreadRange(1, 16);
 
 }  // namespace
 
+#ifdef __llvm__
+// To view disassembly use: gdb ${BINARY}  -batch -ex "disassemble /s $FUNC"
 #define InvokeGetFlag(T)                                             \
   T AbslInvokeGetFlag##T() { return absl::GetFlag(SINGLE_FLAG(T)); } \
   int odr##T = (benchmark::DoNotOptimize(AbslInvokeGetFlag##T), 1);
 
 BENCHMARKED_TYPES(InvokeGetFlag)
-
-// To veiw disassembly use: gdb ${BINARY}  -batch -ex "disassemble /s $FUNC"
+#endif  // __llvm__

absl/numeric/bits_benchmark.cc

@@ -34,7 +34,7 @@ static void BM_bitwidth(benchmark::State& state) {
     values.push_back(absl::Uniform<T>(rng, 0, std::numeric_limits<T>::max()));
   }
 
-  while (state.KeepRunningBatch(count)) {
+  while (state.KeepRunningBatch(static_cast<int64_t>(count))) {
     for (size_t i = 0; i < count; ++i) {
       benchmark::DoNotOptimize(values[i]);
     }
@@ -56,7 +56,7 @@ static void BM_bitwidth_nonzero(benchmark::State& state) {
     values.push_back(absl::Uniform<T>(rng, 1, std::numeric_limits<T>::max()));
   }
 
-  while (state.KeepRunningBatch(count)) {
+  while (state.KeepRunningBatch(static_cast<int64_t>(count))) {
     for (size_t i = 0; i < count; ++i) {
       const T value = values[i];
       ABSL_ASSUME(value > 0);