am 852d4fbb: Merge "Prevent benchmarks from being optimized away."

* commit '852d4fbbe9ddee0261c6b3dcadcd75185157ed46': Prevent benchmarks from being optimized away.
2014-09-25 23:14:43 +00:00
parent 184fd8135c 852d4fbbe9
commit 775c852e14
1 changed files with 2 additions and 2 deletions
--- a/benchmarks/math_benchmark.cpp
+++ b/benchmarks/math_benchmark.cpp
@@ -20,8 +20,8 @@
 #include <math.h>

 // Avoid optimization.
-double d;
-double v;
+volatile double d;
+volatile double v;

 static void BM_math_sqrt(int iters) {
  StartBenchmarkTiming();