From b6e67793a6b6843e4e9f59383a4d5f7696e686a7 Mon Sep 17 00:00:00 2001
From: MoFtZ <MoFtZ@users.noreply.github.com>
Date: Sat, 2 Dec 2023 02:01:54 +1100
Subject: [PATCH] Fixed marshalling ArrayView.Empty as kernel parameter.
 (#1131)

---
 Src/ILGPU.Tests/MemoryBufferOperations.tt    | 21 ++++++++++++++++++++
 Src/ILGPU/Backends/PointerViews/Utilities.cs |  2 +-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/Src/ILGPU.Tests/MemoryBufferOperations.tt b/Src/ILGPU.Tests/MemoryBufferOperations.tt
index da355499e..a01634a19 100644
--- a/Src/ILGPU.Tests/MemoryBufferOperations.tt
+++ b/Src/ILGPU.Tests/MemoryBufferOperations.tt
@@ -109,6 +109,27 @@ namespace ILGPU.Tests
         {
             output[index] = input[index];
         }
+        
+        internal static void EmptyView_Kernel<T>(
+            Index1D index,
+            ArrayView1D<T, Stride1D.Dense> output)
+            where T : unmanaged
+        {
+            if (index < output.Length)
+                output[index] = default(T);
+        }
+
+<#  foreach (var type in copyTypes) { #>
+        [Fact]
+        [KernelMethod(nameof(EmptyView_Kernel))]
+        public void EmptyView_<#= type.Name #>()
+        {
+            Execute<Index1D, <#= type.Type #>>(
+                42,
+                ArrayView1D<<#= type.Type #>, Stride1D.Dense>.Empty);
+        }
+
+<#  } #>
 
         internal static void ZeroLength_Kernel<T>(
             Index1D index,
diff --git a/Src/ILGPU/Backends/PointerViews/Utilities.cs b/Src/ILGPU/Backends/PointerViews/Utilities.cs
index 370fae61a..79eb0957e 100644
--- a/Src/ILGPU/Backends/PointerViews/Utilities.cs
+++ b/Src/ILGPU/Backends/PointerViews/Utilities.cs
@@ -92,7 +92,7 @@ public static FieldInfo GetLengthField(Type implType) =>
         /// <returns>The underlying native pointer.</returns>
         private static IntPtr GetNativePtr<T>(in ArrayView<T> view)
             where T : unmanaged =>
-            view.Buffer.NativePtr;
+            view.Buffer?.NativePtr ?? IntPtr.Zero;
 
         /// <summary>
         /// Gets the native-pointer method for the given element type.