Ensure we throw NotSupportedException for any Vector<T> method taking or returning an unsupported T

src/coreclr/src/jit/simd.cpp

@@ -1822,7 +1822,9 @@ GenTree* Compiler::impSIMDIntrinsic(OPCODE                opcode,
     unsigned                 argCount = 0;
     const SIMDIntrinsicInfo* intrinsicInfo =
         getSIMDIntrinsicInfo(&clsHnd, methodHnd, sig, (opcode == CEE_NEWOBJ), &argCount, &baseType, &size);
-    if (intrinsicInfo == nullptr || intrinsicInfo->id == SIMDIntrinsicInvalid)
+
+    // Exit early if the intrinsic is invalid or unrecognized
+    if ((intrinsicInfo == nullptr) || (intrinsicInfo->id == SIMDIntrinsicInvalid))
     {
         return nullptr;
     }

src/coreclr/src/jit/simdashwintrinsic.cpp

@@ -207,6 +207,13 @@ GenTree* Compiler::impSimdAsHWIntrinsic(NamedIntrinsic        intrinsic,
     // if it isn't the basis for anything carried on the node.
     baseType = getBaseTypeAndSizeOfSIMDType(clsHnd, &simdSize);
 
+    if ((clsHnd != m_simdHandleCache->SIMDVectorHandle) && !varTypeIsArithmetic(baseType))
+    {
+        // We want to exit early if the clsHnd should have a base type and it isn't one
+        // of the supported types. This handles cases like op_Explicit which take a Vector<T>
+        return nullptr;
+    }
+
     if (retType == TYP_STRUCT)
     {
         baseType = getBaseTypeAndSizeOfSIMDType(sig->retTypeSigClass, &simdSize);

src/libraries/System.Numerics.Vectors/tests/GenericVectorUnsupportedTests.cs

@@ -0,0 +1,349 @@
+// 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.Globalization;
+using System.Runtime.InteropServices;
+using Xunit;
+
+namespace System.Numerics.Tests
+{
+    public class GenericVectorUnsupportedTests
+    {
+        [Fact]
+        public void CountTest()
+        {
+            Assert.Throws<NotSupportedException>(() => Vector<bool>.Count);
+        }
+
+        [Fact]
+        public void ZeroTest()
+        {
+            Assert.Throws<NotSupportedException>(() => Vector<bool>.Zero);
+        }
+
+        [Fact]
+        public void OneTest()
+        {
+            Assert.Throws<NotSupportedException>(() => Vector<bool>.One);
+        }
+
+        [Fact]
+        public void ConstructorValueTest()
+        {
+            Assert.Throws<NotSupportedException>(() => new Vector<bool>(false));
+        }
+
+        [Fact]
+        public void ConstructorArrayTest()
+        {
+            bool[] values = new bool[32];
+            Assert.Throws<NotSupportedException>(() => new Vector<bool>(values));
+        }
+
+        [Fact]
+        public void ConstructorArrayIndexTest()
+        {
+            bool[] values = new bool[32];
+            Assert.Throws<NotSupportedException>(() => new Vector<bool>(values, 1));
+        }
+
+        [Fact]
+        public void ConstructorReadOnlySpanByteTest()
+        {
+            Assert.Throws<NotSupportedException>(() => {
+                ReadOnlySpan<byte> values = stackalloc byte[32];
+                _ = new Vector<bool>(values);
+            });
+        }
+
+        [Fact]
+        public void ConstructorReadOnlySpanTTest()
+        {
+            Assert.Throws<NotSupportedException>(() => {
+                ReadOnlySpan<bool> values = stackalloc bool[32];
+                _ = new Vector<bool>(values);
+            });
+        }
+
+        [Fact]
+        public void ConstructorSpanTTest()
+        {
+            Assert.Throws<NotSupportedException>(() => {
+                Span<bool> values = stackalloc bool[32];
+                _ = new Vector<bool>(values);
+            });
+        }
+
+        [Fact]
+        public void CopyToSpanByteTest()
+        {
+            Assert.Throws<NotSupportedException>(() => {
+                Vector<bool> vector = default;
+                Span<byte> destination = stackalloc byte[32];
+                vector.CopyTo(destination);
+            });
+        }
+
+        [Fact]
+        public void CopyToSpanTTest()
+        {
+            Assert.Throws<NotSupportedException>(() => {
+                Vector<bool> vector = default;
+                Span<bool> destination = stackalloc bool[32];
+                vector.CopyTo(destination);
+            });
+        }
+
+        [Fact]
+        public void CopyToArrayTest()
+        {
+            Vector<bool> vector = default;
+            bool[] destination = new bool[32];
+            Assert.Throws<NotSupportedException>(() => vector.CopyTo(destination));
+        }
+
+        [Fact]
+        public void CopyToArrayIndexTest()
+        {
+            Vector<bool> vector = default;
+            bool[] destination = new bool[32];
+            Assert.Throws<NotSupportedException>(() => vector.CopyTo(destination, 1));
+        }
+
+        [Fact]
+        public void IndexerTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => vector[0]);
+        }
+
+        [Fact]
+        public void EqualsObjectTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1.Equals((object)vector2));
+        }
+
+        [Fact]
+        public void EqualsVectorTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1.Equals(vector2));
+        }
+
+        [Fact]
+        public void GetHashCodeTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => vector.GetHashCode());
+        }
+
+        [Fact]
+        public void ToStringTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => vector.ToString());
+        }
+
+        [Fact]
+        public void ToStringFormatTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => vector.ToString("G"));
+        }
+
+        [Fact]
+        public void ToStringFormatFormatProviderTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => vector.ToString("G", CultureInfo.InvariantCulture));
+        }
+
+        [Fact]
+        public void TryCopyToSpanByteTest()
+        {
+            Assert.Throws<NotSupportedException>(() => {
+                Vector<bool> vector = default;
+                Span<byte> destination = stackalloc byte[32];
+                vector.TryCopyTo(destination);
+            });
+        }
+
+        [Fact]
+        public void TryCopyToSpanTTest()
+        {
+            Assert.Throws<NotSupportedException>(() => {
+                Vector<bool> vector = default;
+                Span<bool> destination = stackalloc bool[32];
+                vector.TryCopyTo(destination);
+            });
+        }
+
+        [Fact]
+        public void OpAdditionTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1 + vector2);
+        }
+
+        [Fact]
+        public void OpSubtractionTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1 - vector2);
+        }
+
+        [Fact]
+        public void OpMultiplicationTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1 * vector2);
+        }
+
+        [Fact]
+        public void OpMultiplicationByScalarTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => vector * false);
+            Assert.Throws<NotSupportedException>(() => false * vector);
+        }
+
+        [Fact]
+        public void OpDivideTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1 / vector2);
+        }
+
+        [Fact]
+        public void OpNegateTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => -vector);
+        }
+
+        [Fact]
+        public void OpBitwiseAndTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1 & vector2);
+        }
+
+        [Fact]
+        public void OpBitwiseOrTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1 | vector2);
+        }
+
+        [Fact]
+        public void OpBitwiseXorTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1 ^ vector2);
+        }
+
+        [Fact]
+        public void OpOnesComplementTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => ~vector);
+        }
+
+        [Fact]
+        public void OpEqualsTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1 == vector2);
+        }
+
+        [Fact]
+        public void OpNotEqualsTest()
+        {
+            Vector<bool> vector1 = default;
+            Vector<bool> vector2 = default;
+            Assert.Throws<NotSupportedException>(() => vector1 != vector2);
+        }
+
+        [Fact]
+        public void ToVectorByteTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => (Vector<byte>)vector);
+        }
+
+        [Fact]
+        public void ToVectorSByteTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => (Vector<sbyte>)vector);
+        }
+
+        [Fact]
+        public void ToVectorInt16Test()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => (Vector<short>)vector);
+        }
+
+        [Fact]
+        public void ToVectorUInt16Test()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => (Vector<ushort>)vector);
+        }
+
+        [Fact]
+        public void ToVectorInt32Test()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => (Vector<int>)vector);
+        }
+
+        [Fact]
+        public void ToVectorUInt32Test()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => (Vector<uint>)vector);
+        }
+
+        [Fact]
+        public void ToVectorInt64Test()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => (Vector<long>)vector);
+        }
+
+        [Fact]
+        public void ToVectorUInt64Test()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => (Vector<ulong>)vector);
+        }
+
+        [Fact]
+        public void ToVectorSingleTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => (Vector<float>)vector);
+        }
+
+        [Fact]
+        public void ToVectorDoubleTest()
+        {
+            Vector<bool> vector = default;
+            Assert.Throws<NotSupportedException>(() => (Vector<double>)vector);
+        }
+    }
+}

src/libraries/System.Numerics.Vectors/tests/System.Numerics.Vectors.Tests.csproj

@@ -15,6 +15,7 @@
       <DesignTime>True</DesignTime>
       <DependentUpon>GenericVectorTests.tt</DependentUpon>
     </Compile>
+    <Compile Include="GenericVectorUnsupportedTests.cs" />
     <Compile Include="Util.cs" />
     <Compile Include="Vector2Tests.cs" />
     <Compile Include="Vector3Tests.cs" />