Add LTO in configure, add more benchmarks

bench/tests/BenchPlane.c

@@ -0,0 +1,57 @@
+#include "BH/Bench.h"
+#include "BH/Math/Plane.h"
+
+
+static float pointA[3] = {1.0f, 2.0f, 3.0f};
+static float pointB[3] = {4.0f, 6.0f, 2.0f};
+static float pointC[3] = {2.0f, 1.0f, -1.0f};
+static float testPoint[3] = {5.0f, -3.0f, 7.0f};
+static float planeNormal[4] = {1.0f, -2.0f, 1.0f, 4.0f};
+static float outPlane[4];
+static float outPoint[3];
+
+
+BH_BENCH_TEST(FromPoints)
+{
+    while (BH_BenchIter(state))
+    {
+        int result;
+        result = BH_PlaneFromPoints(pointA, pointB, pointC, outPlane);
+        BH_BenchDoNotOptimize(result);
+        BH_BenchDoNotOptimize(outPlane);
+    }
+}
+
+
+BH_BENCH_TEST(Distance)
+{
+    while (BH_BenchIter(state))
+    {
+        float result;
+        result = BH_PlaneDistance(planeNormal, testPoint);
+        BH_BenchDoNotOptimize(result);
+    }
+}
+
+
+BH_BENCH_TEST(ClosestPoint)
+{
+    while (BH_BenchIter(state))
+    {
+        BH_PlaneClosestPoint(planeNormal, testPoint, outPoint);
+        BH_BenchDoNotOptimize(outPoint);
+    }
+}
+
+
+int main(int argc, char **argv)
+{
+    BH_UNUSED(argc);
+    BH_UNUSED(argv);
+
+    BH_BENCH_ADD(FromPoints);
+    BH_BENCH_ADD(Distance);
+    BH_BENCH_ADD(ClosestPoint);
+
+    return BH_BenchRun();
+}