Make LambdaCompiler prefer interpretation to compilation on iOS

src/libraries/System.Linq.Expressions/src/System.Linq.Expressions.csproj

@@ -1,9 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <FeatureInterpret>true</FeatureInterpret>
-    <TargetFrameworks>$(NetCoreAppCurrent)</TargetFrameworks>
+    <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppCurrent)-iOS;$(NetCoreAppCurrent)-tvOS;$(NetCoreAppCurrent)-MacCatalyst</TargetFrameworks>
     <Nullable>enable</Nullable>
     <IsInterpreting>false</IsInterpreting>
+    <IsInterpreting Condition="'$(TargetsiOS)' == 'true' or '$(TargetstvOS)' == 'true' or '$(TargetsMacCatalyst)' == 'true'">true</IsInterpreting>
     <DefineConstants> $(DefineConstants);FEATURE_DLG_INVOKE;FEATURE_FAST_CREATE</DefineConstants>
     <DefineConstants Condition=" '$(IsInterpreting)' != 'true' ">$(DefineConstants);FEATURE_COMPILE</DefineConstants>
     <DefineConstants Condition=" '$(FeatureInterpret)' == 'true' ">$(DefineConstants);FEATURE_INTERPRET</DefineConstants>

src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/LambdaExpression.cs

@@ -327,7 +327,7 @@ internal static Expression<TDelegate> Create(Expression body, string? name, bool
 
 #if !FEATURE_COMPILE
     // Separate expression creation class to hide the CreateExpressionFunc function from users reflecting on Expression<T>
-    public class ExpressionCreator<TDelegate>
+    internal static class ExpressionCreator<TDelegate>
     {
         public static Expression<TDelegate> CreateExpressionFunc(Expression body, string? name, bool tailCall, ReadOnlyCollection<ParameterExpression> parameters)
         {

src/libraries/System.Linq.Expressions/tests/Dynamic/InvokeMemberBindingTests.cs

@@ -54,6 +54,7 @@ public static IEnumerable<object[]> ObjectArguments()
             yield return new[] {new object()};
         }
 
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/55070", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst)]
         [Theory, MemberData(nameof(ObjectArguments))]
         public void InvokeVirtualMethod(object value)
         {
@@ -411,6 +412,7 @@ public Func<TResult> Delegate
             public OutAction OutDelegate;
         }
 
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/55071", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst)]
         [Fact]
         public void InvokeFuncMember()
         {

src/libraries/System.Linq.Expressions/tests/System.Linq.Expressions.Tests.csproj

@@ -2,9 +2,10 @@
   <PropertyGroup>
     <FeatureInterpret>true</FeatureInterpret>
     <IsInterpreting>false</IsInterpreting>
+    <IsInterpreting Condition="'$(TargetsiOS)' == 'true' or '$(TargetstvOS)' == 'true' or '$(TargetsMacCatalyst)' == 'true'">true</IsInterpreting>
     <DefineConstants Condition=" '$(IsInterpreting)' != 'true' ">$(DefineConstants);FEATURE_COMPILE</DefineConstants>
     <DefineConstants Condition=" '$(FeatureInterpret)' == 'true' ">$(DefineConstants);FEATURE_INTERPRET</DefineConstants>
-    <TargetFrameworks>$(NetCoreAppCurrent)</TargetFrameworks>
+    <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppCurrent)-iOS;$(NetCoreAppCurrent)-tvOS;$(NetCoreAppCurrent)-MacCatalyst</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <AssembliesBeingTested Include="Microsoft.CSharp" />

src/tests/FunctionalTests/iOS/Simulator/AOT/Program.cs

@@ -2,9 +2,9 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
+using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
-using System.Runtime.InteropServices;
 
 public static class Program
 {
@@ -14,6 +14,7 @@ public static class Program
     public static async Task<int> Main(string[] args)
     {
         mono_ios_set_summary($"Starting functional test");
+
         Console.WriteLine("Done!");
         await Task.Delay(5000);
 

src/tests/FunctionalTests/iOS/Simulator/LambdaCompilerAOT/Program.cs

@@ -0,0 +1,28 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Threading;
+using System.Threading.Tasks;
+
+public static class Program
+{
+    [DllImport("__Internal")]
+    public static extern void mono_ios_set_summary (string value);
+
+    public static async Task<int> Main(string[] args)
+    {
+        mono_ios_set_summary($"Starting functional test");
+
+        // https://github.com/dotnet/runtime/issues/47112
+        var foos = new string [] { "hi", "bye" };
+        string f = foos.AsQueryable ().First ();
+
+        Console.WriteLine("Done!");
+        await Task.Delay(5000);
+
+        return 42;
+    }
+}

src/tests/FunctionalTests/iOS/Simulator/LambdaCompilerAOT/iOS.Simulator.LambdaCompilerAot.Test.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk" TreatAsLocalProperty="MonoForceInterpreter">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <MonoForceInterpreter>false</MonoForceInterpreter>
+    <RunAOTCompilation>true</RunAOTCompilation>
+    <TestRuntime>true</TestRuntime>
+    <TargetFrameworks>$(NetCoreAppCurrent)</TargetFrameworks>
+    <TargetOS Condition="'$(TargetOS)' == ''">iOSSimulator</TargetOS>
+    <MainLibraryFileName>iOS.Simulator.LambdaCompilerAot.Test.dll</MainLibraryFileName>
+    <IncludesTestRunner>false</IncludesTestRunner>
+    <ExpectedExitCode>42</ExpectedExitCode>
+    <EnableAggressiveTrimming>true</EnableAggressiveTrimming>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Include="Program.cs" />
+  </ItemGroup>
+</Project>