| #include "benchmark/benchmark.h" |
| |
| #include <cstdint> |
| |
| namespace { |
| #if defined(__GNUC__) |
| std::uint64_t double_up(const std::uint64_t x) __attribute__((const)); |
| #endif |
| std::uint64_t double_up(const std::uint64_t x) { return x * 2; } |
| } |
| |
| int main(int, char*[]) { |
| // this test verifies compilation of DoNotOptimize() for some types |
| |
| char buffer8[8]; |
| benchmark::DoNotOptimize(buffer8); |
| |
| char buffer20[20]; |
| benchmark::DoNotOptimize(buffer20); |
| |
| char buffer1024[1024]; |
| benchmark::DoNotOptimize(buffer1024); |
| benchmark::DoNotOptimize(&buffer1024[0]); |
| |
| int x = 123; |
| benchmark::DoNotOptimize(x); |
| benchmark::DoNotOptimize(&x); |
| benchmark::DoNotOptimize(x += 42); |
| |
| benchmark::DoNotOptimize(double_up(x)); |
| |
| return 0; |
| } |