Enable Sve.CreateBreakPropagateMask() to take both operands as zero

src/coreclr/jit/hwintrinsiccodegenarm64.cpp

@@ -729,9 +729,11 @@ void CodeGen::genHWIntrinsic(GenTreeHWIntrinsic* node)
                         switch (intrinEmbMask.id)
                         {
                             case NI_Sve_CreateBreakPropagateMask:
-                                assert(targetReg != embMaskOp1Reg);
-                                GetEmitter()->emitIns_Mov(INS_sve_mov, emitSize, targetReg, embMaskOp2Reg,
-                                                          /* canSkip */ true);
+                                if (targetReg != embMaskOp1Reg)
+                                {
+                                    GetEmitter()->emitIns_Mov(INS_sve_mov, emitSize, targetReg, embMaskOp2Reg,
+                                                              /* canSkip */ true);
+                                }
                                 emitInsHelper(targetReg, maskReg, embMaskOp1Reg);
                                 break;
 

src/tests/JIT/Regression/JitBlue/Runtime_106124/Runtime_106124.cs

@@ -0,0 +1,30 @@
+// 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.Numerics;
+using System.Runtime.CompilerServices;
+using System.Runtime.Intrinsics;
+using System.Runtime.Intrinsics.Arm;
+using Xunit;
+
+public class Runtime_106124
+{
+    [Fact]
+    public static void TestEntryPoint()
+    {
+         if (Sve.IsSupported)
+        {
+            var vr19 = Vector128.CreateScalar(0L).AsVector();
+            var vr25 = Sve.CreateBreakPropagateMask(vr19, vr19);
+            Consume(vr25);
+        }
+    }
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    private static void Consume(Vector<long> v)
+    {
+        ;
+    }
+
+}

src/tests/JIT/Regression/JitBlue/Runtime_106124/Runtime_106124.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <Optimize>True</Optimize>
+    <NoWarn>$(NoWarn),SYSLIB5003</NoWarn>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildProjectName).cs" />
+  </ItemGroup>
+</Project>