use size_t instead of int for the iteration count

src/benchmark.cc

@@ -596,7 +596,7 @@ namespace {
 // Execute one thread of benchmark b for the specified number of iterations.
 // Adds the stats collected for the thread into *total.
 void RunInThread(const benchmark::internal::Benchmark::Instance* b,
-                 int iters, int thread_id,
+                 size_t iters, int thread_id,
                  ThreadStats* total) EXCLUDES(GetBenchmarkLock()) {
   State st(iters, b->has_arg1, b->arg1, b->has_arg2, b->arg2, thread_id);
   b->benchmark->Run(st);
@@ -613,7 +613,7 @@ void RunInThread(const benchmark::internal::Benchmark::Instance* b,
 
 void RunBenchmark(const benchmark::internal::Benchmark::Instance& b,
                   BenchmarkReporter* br) EXCLUDES(GetBenchmarkLock()) {
-  int iters = 1;
+  size_t iters = 1;
 
   std::vector<BenchmarkReporter::Run> reports;
 

test/benchmark_test.cc

@@ -101,8 +101,7 @@ static void BM_Sequential(benchmark::State& state) {
     for (int i = state.range_x(); --i; )
       c.push_back(v);
   }
-  const int64_t items_processed =
-      static_cast<int64_t>(state.iterations()) * state.range_x();
+  const size_t items_processed = state.iterations() * state.range_x();
   state.SetItemsProcessed(items_processed);
   state.SetBytesProcessed(items_processed * sizeof(v));
 }