Add LTO in configure, add more benchmarks

bench/tests/BenchBox3f.c

@@ -0,0 +1,82 @@
+#include "BH/Bench.h"
+#include "BH/Math/Box3f.h"
+
+
+static float boxAMin[3] = {1.0f, 2.0f, 3.0f};
+static float boxAMax[3] = {6.0f, 7.0f, 8.0f};
+static float boxBMin[3] = {4.0f, 5.0f, 2.0f};
+static float boxBMax[3] = {9.0f, 10.0f, 6.0f};
+static float pointInside[3] = {3.0f, 4.0f, 5.0f};
+static float pointList[] =
+{
+    1.0f, 2.0f, 3.0f,
+    5.0f, 1.0f, 7.0f,
+    2.0f, 6.0f, 4.0f,
+    8.0f, 3.0f, 5.0f,
+    4.0f, 4.0f, 1.0f
+};
+static size_t pointCount = 5;
+static float outMin[3];
+static float outMax[3];
+
+
+BH_BENCH_TEST(Union)
+{
+    while (BH_BenchIter(state))
+    {
+        BH_Box3fUnion(boxAMin, boxAMax, boxBMin, boxBMax, outMin, outMax);
+        BH_BenchDoNotOptimize(outMin);
+        BH_BenchDoNotOptimize(outMax);
+    }
+}
+
+
+BH_BENCH_TEST(Intersect)
+{
+    while (BH_BenchIter(state))
+    {
+        int result;
+        result = BH_Box3fIntersect(boxAMin, boxAMax, boxBMin, boxBMax, outMin, outMax);
+        BH_BenchDoNotOptimize(result);
+        BH_BenchDoNotOptimize(outMin);
+        BH_BenchDoNotOptimize(outMax);
+    }
+}
+
+
+BH_BENCH_TEST(Contains)
+{
+    while (BH_BenchIter(state))
+    {
+        int result;
+        result = BH_Box3fContains(boxAMin, boxAMax, pointInside);
+        BH_BenchDoNotOptimize(result);
+    }
+}
+
+
+BH_BENCH_TEST(Enclose)
+{
+    while (BH_BenchIter(state))
+    {
+        int result;
+        result = BH_Box3fEnclose(pointList, pointCount, outMin, outMax);
+        BH_BenchDoNotOptimize(result);
+        BH_BenchDoNotOptimize(outMin);
+        BH_BenchDoNotOptimize(outMax);
+    }
+}
+
+
+int main(int argc, char **argv)
+{
+    BH_UNUSED(argc);
+    BH_UNUSED(argv);
+
+    BH_BENCH_ADD(Union);
+    BH_BENCH_ADD(Intersect);
+    BH_BENCH_ADD(Contains);
+    BH_BENCH_ADD(Enclose);
+
+    return BH_BenchRun();
+}