Revert "misc: chore: Remove redundant code"

This reverts commit 05a88ccc94.

src/Ryujinx.Cpu/LightningJit/Cache/CacheEntry.cs

@@ -14,7 +14,7 @@ namespace Ryujinx.Cpu.LightningJit.Cache
             Size = size;
         }
 
-        public int CompareTo(CacheEntry other)
+        public int CompareTo([AllowNull] CacheEntry other)
         {
             return Offset.CompareTo(other.Offset);
         }

src/Ryujinx.Cpu/LightningJit/Cache/CacheMemoryAllocator.cs

@@ -18,7 +18,7 @@ namespace Ryujinx.Cpu.LightningJit.Cache
                 Size = size;
             }
 
-            public int CompareTo(MemoryBlock other)
+            public int CompareTo([AllowNull] MemoryBlock other)
             {
                 return Offset.CompareTo(other.Offset);
             }

src/Ryujinx.Cpu/LightningJit/Cache/JitCache.cs

@@ -28,7 +28,7 @@ namespace Ryujinx.Cpu.LightningJit.Cache
         private static readonly Lock _lock = new();
         private static bool _initialized;
         private static readonly List<ReservedRegion> _jitRegions = [];
-        private static int _activeRegionIndex;
+        private static int _activeRegionIndex = 0;
 
         [SupportedOSPlatform("windows")]
         [LibraryImport("kernel32.dll", SetLastError = true)]
@@ -75,9 +75,12 @@ namespace Ryujinx.Cpu.LightningJit.Cache
 
                 if (OperatingSystem.IsMacOS() && RuntimeInformation.ProcessArchitecture == Architecture.Arm64)
                 {
-                    fixed (byte* codePtr = code)
+                    unsafe
                     {
-                        JitSupportDarwin.Copy(funcPtr, (IntPtr)codePtr, (ulong)code.Length);
+                        fixed (byte* codePtr = code)
+                        {
+                            JitSupportDarwin.Copy(funcPtr, (IntPtr)codePtr, (ulong)code.Length);
+                        }
                     }
                 }
                 else

src/Ryujinx.Cpu/LightningJit/Cache/PageAlignedRangeList.cs

@@ -20,7 +20,7 @@ namespace Ryujinx.Cpu.LightningJit.Cache
                 Size = size;
             }
 
-            public int CompareTo(Range other)
+            public int CompareTo([AllowNull] Range other)
             {
                 return Offset.CompareTo(other.Offset);
             }