Fix the VN for xor operation (#92372)

Co-authored-by: Kunal Pathak <Kunal.Pathak@microsoft.com>

src/coreclr/jit/valuenum.cpp

@@ -7891,7 +7891,7 @@ ValueNum ValueNumStore::EvalHWIntrinsicFunBinary(var_types type,
 #endif
  {
  // Handle `x ^ x == 0`
- return arg0VN;
+ return VNZeroForType(type);
  }
 
  default:

src/tests/JIT/Regression/JitBlue/Runtime_91252/Runtime_91252.cs

@@ -0,0 +1,37 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+//
+// This test verifies if we correctly value number the operation of 
+// x ^ x to zero.
+//
+// Found by Antigen
+
+using System.Runtime.CompilerServices;
+using System.Runtime.Intrinsics;
+using Xunit;
+
+public class Issue_91252
+{
+ static Vector64<int> s_v64_int_22 = Vector64.Create(-5);
+ Vector64<int> v64_int_72 = Vector64.Create(-1);
+
+ [MethodImpl(MethodImplOptions.NoInlining)]
+ public int Repro()
+ {
+ s_v64_int_22 = v64_int_72;
+ return Check(v64_int_72 ^ v64_int_72);
+ }
+
+ [MethodImpl(MethodImplOptions.NoInlining)]
+ public int Check(Vector64<int> a)
+ {
+ return (a == Vector64<int>.Zero) ? 100 : 101;
+ }
+
+ [Fact]
+ public static int EntryPoint()
+ {
+ var obj = new Issue_91252();
+ return obj.Repro();
+ }
+}

src/tests/JIT/Regression/JitBlue/Runtime_91252/Runtime_91252.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+ <PropertyGroup>
+ <Optimize>True</Optimize>
+ </PropertyGroup>
+ <ItemGroup>
+ <Compile Include="$(MSBuildProjectName).cs" />
+ </ItemGroup>
+</Project>