[Swift interop] Add inline array struct lowering tests

src/tests/Interop/CMakeLists.txt

@@ -110,4 +110,5 @@ if(CLR_CMAKE_TARGET_APPLE)
     add_subdirectory(Swift/SwiftInvalidCallConv)
     add_subdirectory(Swift/SwiftRetAbiStress)
     add_subdirectory(Swift/SwiftSelfContext)
+    add_subdirectory(Swift/SwiftStructLowering)
 endif()

src/tests/Interop/Swift/SwiftStructLowering/CMakeLists.txt

@@ -0,0 +1,24 @@
+project(SwiftStructLowering)
+include ("${CLR_INTEROP_TEST_ROOT}/Interop.cmake")
+
+set(SOURCE SwiftStructLowering)
+
+if (NOT SWIFT_COMPILER_TARGET AND CLR_CMAKE_TARGET_APPLE)
+    set(SWIFT_PLATFORM "macosx")
+    set(SWIFT_PLATFORM_SUFFIX "")
+    if (NOT CMAKE_OSX_DEPLOYMENT_TARGET)
+        set(CMAKE_OSX_DEPLOYMENT_TARGET "12.0")
+    endif()
+    set(SWIFT_DEPLOYMENT_TARGET ${CMAKE_OSX_DEPLOYMENT_TARGET})
+    set(SWIFT_COMPILER_TARGET "${CMAKE_OSX_ARCHITECTURES}-apple-${SWIFT_PLATFORM}${SWIFT_DEPLOYMENT_TARGET}${SWIFT_PLATFORM_SUFFIX}")
+endif()
+
+add_custom_target(${SOURCE} ALL
+    COMMAND xcrun swiftc -target ${SWIFT_COMPILER_TARGET} -emit-library ${CMAKE_CURRENT_SOURCE_DIR}/${SOURCE}.swift -o ${CMAKE_CURRENT_BINARY_DIR}/lib${SOURCE}.dylib
+    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${SOURCE}.swift
+    COMMENT "Generating ${SOURCE} library"
+)
+
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/lib${SOURCE}.dylib
+    DESTINATION bin
+)

src/tests/Interop/Swift/SwiftStructLowering/SwiftStructLowering.cs

@@ -0,0 +1,153 @@
+// 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.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Runtime.InteropServices.Swift;
+using Xunit;
+
+public class SwiftStructLowering
+{
+    private const string SwiftLib = "libSwiftStructLowering.dylib";
+
+    [InlineArray(32)]
+    struct F0
+    {
+        private byte _element0;
+    }
+
+    [UnmanagedCallConv(CallConvs = new Type[] { typeof(CallConvSwift) })]
+    [DllImport(SwiftLib, EntryPoint = "$s19SwiftStructLowering10swiftFunc02a0SiAA2F0V_tF")]
+    private static extern nint SwiftFunc0(F0 a0);
+
+    [Fact]
+    public static unsafe void TestFuncWithByteInlineArray()
+    {
+        F0 a0 = default;
+        byte* ptr = (byte*)&a0;
+
+        ptr[0] = (byte)122;
+        ptr[1] = (byte)223;
+        ptr[2] = (byte)66;
+        ptr[3] = (byte)1;
+        ptr[4] = (byte)135;
+        ptr[5] = (byte)209;
+        ptr[6] = (byte)54;
+        ptr[7] = (byte)221;
+        ptr[8] = (byte)24;
+        ptr[9] = (byte)104;
+        ptr[10] = (byte)21;
+        ptr[11] = (byte)222;
+        ptr[12] = (byte)156;
+        ptr[13] = (byte)241;
+        ptr[14] = (byte)97;
+        ptr[15] = (byte)141;
+        ptr[16] = (byte)239;
+        ptr[17] = (byte)184;
+        ptr[18] = (byte)69;
+        ptr[19] = (byte)247;
+        ptr[20] = (byte)134;
+        ptr[21] = (byte)121;
+        ptr[22] = (byte)204;
+        ptr[23] = (byte)45;
+        ptr[24] = (byte)112;
+        ptr[25] = (byte)166;
+        ptr[26] = (byte)220;
+        ptr[27] = (byte)221;
+        ptr[28] = (byte)86;
+        ptr[29] = (byte)197;
+        ptr[30] = (byte)178;
+        ptr[31] = (byte)29;
+
+
+        long result = SwiftFunc0(a0);
+        Assert.Equal(8091295595945034296, result);
+        Console.WriteLine("OK");
+    }
+
+
+    [InlineArray(8)]
+    struct F1
+    {
+        private int _element0;
+    }
+
+    [UnmanagedCallConv(CallConvs = new Type[] { typeof(CallConvSwift) })]
+    [DllImport(SwiftLib, EntryPoint = "$s19SwiftStructLowering10swiftFunc12a0SiAA2F1V_tF")]
+    private static extern nint SwiftFunc1(F1 a0);
+
+    [Fact]
+    public static unsafe void TestFuncWithIntInlineArray()
+    {
+        F1 a0 = default;
+        int* ptr = (int*)&a0;
+
+        ptr[0] = (int)-1172606642;
+        ptr[1] = (int)2004011304;
+        ptr[2] = (int)-1751053775;
+        ptr[3] = (int)-1361536584;
+        ptr[4] = (int)1578364919;
+        ptr[5] = (int)1205365715;
+        ptr[6] = (int)-883274792;
+        ptr[7] = (int)-550660826;
+
+
+        long result = SwiftFunc1(a0);
+        Assert.Equal(8444261314257660732, result);
+        Console.WriteLine("OK");
+    }
+
+    [InlineArray(6)]
+    struct F2
+    {
+        private ulong _element0;
+    }
+
+    [UnmanagedCallConv(CallConvs = new Type[] { typeof(CallConvSwift) })]
+    [DllImport(SwiftLib, EntryPoint = "$s19SwiftStructLowering10swiftFunc22a0SiAA2F2V_tF")]
+    private static extern nint SwiftFunc2(F2 a0);
+
+    [Fact]
+    public static unsafe void TestFuncWithLargeInlineArray()
+    {
+        F2 a0 = default;
+        ulong* ptr = (ulong*)&a0;
+
+        ptr[0] = (ulong)163054281557578879;
+        ptr[1] = (ulong)3715665182263428629;
+        ptr[2] = (ulong)15352099497683712058;
+        ptr[3] = (ulong)9456667702469177637;
+        ptr[4] = (ulong)5768234261922277852;
+        ptr[5] = (ulong)17154681812528174574;
+
+
+        long result = SwiftFunc2(a0);
+        Assert.Equal(-627554439188077294, result);
+        Console.WriteLine("OK");
+    }
+
+    [InlineArray(1)]
+    struct F3
+    {
+        private byte _element0;
+    }
+
+    [UnmanagedCallConv(CallConvs = new Type[] { typeof(CallConvSwift) })]
+    [DllImport(SwiftLib, EntryPoint = "$s19SwiftStructLowering10swiftFunc32a0SiAA2F3V_tF")]
+    private static extern nint SwiftFunc3(F3 a0);
+
+    [Fact]
+    public static unsafe void TestFuncWithSingleElementInlineArray()
+    {
+        F3 a0 = default;
+        byte* ptr = (byte*)&a0;
+
+        ptr[0] = (byte)177;
+
+
+        long result = SwiftFunc3(a0);
+        Assert.Equal(-5808468912223652740, result);
+        Console.WriteLine("OK");
+    }
+}

src/tests/Interop/Swift/SwiftStructLowering/SwiftStructLowering.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <!-- Needed for CLRTestTargetUnsupported, CMakeProjectReference -->
+    <RequiresProcessIsolation>true</RequiresProcessIsolation>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <!-- Swift interop is supported on Apple platforms only -->
+    <CLRTestTargetUnsupported Condition="'$(TargetsOSX)' != 'true' and '$(TargetsAppleMobile)' != 'true'">true</CLRTestTargetUnsupported>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildProjectName).cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="$(TestLibraryProjectPath)" />
+    <CMakeProjectReference Include="CMakeLists.txt" />
+  </ItemGroup>
+</Project>

src/tests/Interop/Swift/SwiftStructLowering/SwiftStructLowering.swift

@@ -0,0 +1,102 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+struct HasherFNV1a {
+
+    private var hash: UInt = 14_695_981_039_346_656_037
+    private let prime: UInt = 1_099_511_628_211
+
+    mutating func combine<T>(_ val: T) {
+        for byte in withUnsafeBytes(of: val, Array.init) {
+            hash ^= UInt(byte)
+            hash = hash &* prime
+        }
+    }
+
+    func finalize() -> Int {
+        Int(truncatingIfNeeded: hash)
+    }
+}
+
+@frozen public struct F0 {
+    public var elements: (UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8, UInt8)
+}
+
+public func swiftFunc0(a0: F0) -> Int {
+    var hasher = HasherFNV1a()
+    hasher.combine(a0.elements.0);
+    hasher.combine(a0.elements.1);
+    hasher.combine(a0.elements.2);
+    hasher.combine(a0.elements.3);
+    hasher.combine(a0.elements.4);
+    hasher.combine(a0.elements.5);
+    hasher.combine(a0.elements.6);
+    hasher.combine(a0.elements.7);
+    hasher.combine(a0.elements.8);
+    hasher.combine(a0.elements.9);
+    hasher.combine(a0.elements.10);
+    hasher.combine(a0.elements.11);
+    hasher.combine(a0.elements.12);
+    hasher.combine(a0.elements.13);
+    hasher.combine(a0.elements.14);
+    hasher.combine(a0.elements.15);
+    hasher.combine(a0.elements.16);
+    hasher.combine(a0.elements.17);
+    hasher.combine(a0.elements.18);
+    hasher.combine(a0.elements.19);
+    hasher.combine(a0.elements.20);
+    hasher.combine(a0.elements.21);
+    hasher.combine(a0.elements.22);
+    hasher.combine(a0.elements.23);
+    hasher.combine(a0.elements.24);
+    hasher.combine(a0.elements.25);
+    hasher.combine(a0.elements.26);
+    hasher.combine(a0.elements.27);
+    hasher.combine(a0.elements.28);
+    hasher.combine(a0.elements.29);
+    hasher.combine(a0.elements.30);
+    hasher.combine(a0.elements.31);
+    return hasher.finalize()
+}
+
+@frozen public struct F1 {
+    public var elements: (Int32, Int32, Int32, Int32, Int32, Int32, Int32, Int32)
+}
+
+public func swiftFunc1(a0: F1) -> Int {
+    var hasher = HasherFNV1a()
+    hasher.combine(a0.elements.0);
+    hasher.combine(a0.elements.1);
+    hasher.combine(a0.elements.2);
+    hasher.combine(a0.elements.3);
+    hasher.combine(a0.elements.4);
+    hasher.combine(a0.elements.5);
+    hasher.combine(a0.elements.6);
+    hasher.combine(a0.elements.7);
+    return hasher.finalize()
+}
+
+@frozen public struct F2 {
+    public var elements: (UInt64, UInt64, UInt64, UInt64, UInt64, UInt64)
+}
+
+public func swiftFunc2(a0: F2) -> Int {
+    var hasher = HasherFNV1a()
+    hasher.combine(a0.elements.0);
+    hasher.combine(a0.elements.1);
+    hasher.combine(a0.elements.2);
+    hasher.combine(a0.elements.3);
+    hasher.combine(a0.elements.4);
+    hasher.combine(a0.elements.5);
+    return hasher.finalize()
+}
+
+@frozen public struct F3 {
+    public var element:  UInt8
+}
+
+public func swiftFunc3(a0: F3) -> Int {
+    var hasher = HasherFNV1a()
+    hasher.combine(a0.element);
+    return hasher.finalize()
+}