Add test case

src/tests/JIT/Regression/JitBlue/Runtime_74117/Runtime_74117.cs

@@ -0,0 +1,27 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Runtime.CompilerServices;
+
+unsafe class Runtime_74117
+{
+    public unsafe static int Main(string[] args)
+    {
+        byte a = 5;
+        Problem(ref a, 5);
+        return 100;
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    static byte GetByte() => 1;
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    private static void Problem(ref byte x, int a)
+    {
+        JitUse(&a);
+        Unsafe.Add(ref x, a) = GetByte();
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    public static void JitUse<T>(T* arg) where T : unmanaged { }
+}

src/tests/JIT/Regression/JitBlue/Runtime_74117/Runtime_74117.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <Optimize>True</Optimize>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildProjectName).cs" />
+  </ItemGroup>
+</Project>