Imported Upstream version 1.1.0upstream/1.1.0

1 files changed, 90 insertions, 0 deletions

diff --git a/tests/src/JIT/Performance/CodeQuality/BenchI/XposMatrix/XposMatrix.cs b/tests/src/JIT/Performance/CodeQuality/BenchI/XposMatrix/XposMatrix.cs
new file mode 100644
index 0000000000..0bb17b8cc5
--- /dev/null
+++ b/tests/src/JIT/Performance/CodeQuality/BenchI/XposMatrix/XposMatrix.cs
@@ -0,0 +1,90 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+//
+
+using Microsoft.Xunit.Performance;
+using System;
+using System.Runtime.CompilerServices;
+using Xunit;
+
+[assembly: OptimizeForBenchmarks]
+[assembly: MeasureInstructionsRetired]
+
+public static class XposMatrix
+{
+    public const int ArraySize = 100;
+
+#if DEBUG
+    public const int Iterations = 1;
+#else
+    public const int Iterations = 25000;
+#endif
+
+    static T[][] AllocArray<T>(int n1, int n2) {
+        T[][] a = new T[n1][];
+        for (int i = 0; i < n1; ++i) {
+            a[i] = new T[n2];
+        }
+        return a;
+    }
+
+    static void Inner(int[][] x, int n) {
+        for (int i = 1; i <= n; i++) {
+            for (int j = 1; j <= n; j++) {
+                int t = x[i][j];
+                x[i][j] = x[j][i];
+                x[j][i] = t;
+            }
+        }
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    static bool Bench(int[][] matrix) {
+
+        int n = ArraySize;
+        for (int i = 1; i <= n; i++) {
+            for (int j = 1; j <= n; j++) {
+                matrix[i][j] = 1;
+            }
+        }
+        
+        if (matrix[n][n] != 1) {
+            return false;
+        }
+        
+        Inner(matrix, n);
+
+        if (matrix[n][n] != 1) {
+            return false;
+        }
+
+        return true;
+    }
+
+    [Benchmark]
+    public static void Test() {
+        int[][] matrix = AllocArray<int>(ArraySize + 1, ArraySize + 1);
+        foreach (var iteration in Benchmark.Iterations) {
+            using (iteration.StartMeasurement()) {
+                for (int i = 0; i < Iterations; i++) {
+                    Bench(matrix);
+                }
+            }
+        }
+    }
+
+    static bool TestBase() {
+        int[][] matrix = AllocArray<int>(ArraySize + 1, ArraySize + 1);
+        bool result = true;
+        for (int i = 0; i < Iterations; i++) {
+            result &= Bench(matrix);
+        }
+        return result;
+    }
+
+    public static int Main() {
+        bool result = TestBase();
+        return (result ? 100 : -1);
+    }
+}