Expose MethodImplOptions.AggressiveOptimization and MethodImplAttribu…

…tes.AggressiveOptimization (#32322)

* Expose MethodImplOptions.AggressiveOptimization

Part of fix for https://github.com/dotnet/corefx/issues/32235
Depends on dotnet/coreclr#20009
API review: https://github.com/dotnet/corefx/issues/32235

* Include new test

* Expose MethodImplAttributes.AggressiveOptimization and fix test

API review: https://github.com/dotnet/corefx/issues/32628

src/System.Runtime/ref/System.Runtime.cs

@@ -5896,6 +5896,7 @@ protected MethodBody() { }
     public enum MethodImplAttributes
     {
         AggressiveInlining = 256,
+        AggressiveOptimization = 512,
         CodeTypeMask = 3,
         ForwardRef = 16,
         IL = 0,
@@ -6661,6 +6662,7 @@ public MethodImplAttribute(System.Runtime.CompilerServices.MethodImplOptions met
     public enum MethodImplOptions
     {
         AggressiveInlining = 256,
+        AggressiveOptimization = 512,
         ForwardRef = 16,
         InternalCall = 4096,
         NoInlining = 8,

src/System.Runtime/tests/System.Runtime.Tests.csproj

@@ -249,6 +249,7 @@
     <Compile Include="System\Reflection\TypeDelegatorTests.netcoreapp.cs" />
     <Compile Include="System\Runtime\CompilerServices\CallerArgumentExpressionAttributeTests.cs" />
     <Compile Include="System\Runtime\CompilerServices\ConditionalWeakTableTests.netcoreapp.cs" />
+    <Compile Include="System\Runtime\CompilerServices\MethodImplAttributeTests.netcoreapp.cs" />
     <Compile Include="System\Runtime\CompilerServices\RuntimeHelpersTests.netcoreapp.cs" />
     <Compile Include="System\Runtime\CompilerServices\RuntimeFeatureTests.netcoreapp.cs" />
     <Compile Include="System\Runtime\CompilerServices\RuntimeWrappedExceptionTests.cs" />

src/System.Runtime/tests/System/Runtime/CompilerServices/MethodImplAttributeTests.netcoreapp.cs

@@ -0,0 +1,21 @@
+// 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.Reflection;
+using Xunit;
+
+namespace System.Runtime.CompilerServices.Tests
+{
+    public static class MethodImplAttributeTests
+    {
+        [Fact]
+        [MethodImpl(MethodImplOptions.AggressiveOptimization)]
+        public static void AggressiveOptimizationTest()
+        {
+            MethodImplAttributes implAttributes = MethodBase.GetCurrentMethod().MethodImplementationFlags;
+            Assert.Equal(MethodImplAttributes.AggressiveOptimization, implAttributes);
+            Assert.Equal(MethodImplOptions.AggressiveOptimization, (MethodImplOptions)implAttributes);
+        }
+    }
+}