From 75e2ac549d7f50ab469fa5a1b05c81e08bb526a2 Mon Sep 17 00:00:00 2001
From: Alan Hayward <alan.hayward@arm.com>
Date: Thu, 30 Jun 2022 16:40:45 +0100
Subject: [PATCH] Add If statement benchmarks

---
 src/benchmarks/micro/runtime/Statements/If.cs | 195 ++++++++++++++++++
 1 file changed, 195 insertions(+)
 create mode 100644 src/benchmarks/micro/runtime/Statements/If.cs

diff --git a/src/benchmarks/micro/runtime/Statements/If.cs b/src/benchmarks/micro/runtime/Statements/If.cs
new file mode 100644
index 00000000000..3db6b905224
--- /dev/null
+++ b/src/benchmarks/micro/runtime/Statements/If.cs
@@ -0,0 +1,195 @@
+// 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 System;
+using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Running;
+using MicroBenchmarks;
+using System.Runtime.CompilerServices;
+
+namespace IfStatements
+{
+    [BenchmarkCategory(Categories.Runtime)]
+    public unsafe class IfStatements
+    {
+        private const int Iterations = 10000;
+        private const int MaxArgsPassed = 4; // Num of args in Consume
+
+        private static int[] inputs;
+
+        private static int s_seed;
+
+        static void InitRand() {
+            s_seed = 7774755;
+        }
+
+        static int Rand(ref int seed) {
+            s_seed = (s_seed * 77 + 13218009) % 3687091;
+            return seed;
+        }
+
+        public IfStatements()
+        {
+            inputs = new int[Iterations + MaxArgsPassed];
+            for (int i = 0; i < inputs.Length; i++) {
+                inputs[i] = Rand(ref s_seed) - 1;
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        static void Consume(int op1, int op2, int op3, int op4) {
+            return;
+        }
+
+        [Benchmark]
+        public void Single() {
+            for (int i = 0; i < Iterations; i++) {
+                SingleInner(inputs[i]);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void SingleInner(int op1) {
+            if (op1 % 2 == 0) {
+                op1 = 5;
+            }
+            Consume(op1, 0, 0, 0);
+        }
+
+        [Benchmark]
+        public void And() {
+            for (int i = 0; i < Iterations; i++) {
+                AndInner(inputs[i], inputs[i+1]);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void AndInner(int op1, int op2) {
+            if (op1 % 2 == 0 && op2 % 2 == 0) {
+                op1 = 5;
+            }
+            Consume(op1, op2, 0, 0);
+        }
+
+        [Benchmark]
+        public void AndAnd() {
+            for (int i = 0; i < Iterations; i++) {
+                AndAndInner(inputs[i], inputs[i+1], inputs[i+2]);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void AndAndInner(int op1, int op2, int op3) {
+            if (op1 % 2 == 0 && op2 % 2 == 0 && op3 % 2 == 0) {
+                op1 = 5;
+            }
+            Consume(op1, op2, op3, 0);
+        }
+
+        [Benchmark]
+        public void AndAndAnd() {
+            for (int i = 0; i < Iterations; i++) {
+                AndAndAndInner(inputs[i], inputs[i+1], inputs[i+2], inputs[i+3]);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void AndAndAndInner(int op1, int op2, int op3, int op4) {
+            if (op1 % 2 == 0 && op2 % 2 == 0 && op3 % 2 == 0 && op4 % 2 == 0) {
+                op1 = 5;
+            }
+            Consume(op1, op2, op3, op4);
+        }
+
+        [Benchmark]
+        public void Or() {
+            for (int i = 0; i < Iterations; i++) {
+                OrInner(inputs[i], inputs[i+1]);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void OrInner(int op1, int op2) {
+            if (op1 % 2 == 0 || op2 % 2 == 0) {
+                op1 = 5;
+            }
+            Consume(op1, op2, 0, 0);
+        }
+
+        [Benchmark]
+        public void OrOr() {
+            for (int i = 0; i < Iterations; i++) {
+                OrOrInner(inputs[i], inputs[i+1], inputs[i+2]);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void OrOrInner(int op1, int op2, int op3) {
+            if (op1 % 2 == 0 || op2 % 2 == 0 || op3 % 2 == 0) {
+                op1 = 5;
+            }
+            Consume(op1, op2, op3, 0);
+        }
+
+        [Benchmark]
+        public void AndOr() {
+            for (int i = 0; i < Iterations; i++) {
+                AndOrInner(inputs[i], inputs[i+1], inputs[i+2]);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void AndOrInner(int op1, int op2, int op3) {
+            if (op1 % 2 == 0 && op2 % 2 == 0 || op3 % 2 == 0) {
+                op1 = 5;
+            }
+            Consume(op1, op2, op3, 0);
+        }
+
+        [Benchmark]
+        public void SingleArray() {
+            for (int i = 0; i < Iterations; i++) {
+                SingleArrayInner(i);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void SingleArrayInner(int op1) {
+            if (inputs[op1] % 2 == 0) {
+                op1 = 5;
+            }
+            Consume(op1, 0, 0, 0);
+        }
+
+        [Benchmark]
+        public void AndArray() {
+            for (int i = 0; i < Iterations; i++) {
+                AndArrayInner(i, i+1);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void AndArrayInner(int op1, int op2) {
+            if (inputs[op1] % 2 == 0 && inputs[op2] % 2 == 0) {
+                op1 = 5;
+            }
+            Consume(op1, op2, 0, 0);
+        }
+
+        [Benchmark]
+        public void OrArray() {
+            for (int i = 0; i < Iterations; i++) {
+                OrArrayInner(i, i+1);
+            }
+        }
+
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void OrArrayInner(int op1, int op2) {
+            if (inputs[op1] % 2 == 0 || inputs[op2] % 2 == 0) {
+                op1 = 5;
+            }
+            Consume(op1, op2, 0, 0);
+        }
+    }
+}