Remove a few uint casts in CoreLib (#119973)

Author: xtqqczze

src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/MemoryMarshal.cs

@@ -472,7 +472,7 @@ public static unsafe T Read<T>(ReadOnlySpan<byte> source)
             {
                 ThrowHelper.ThrowArgument_TypeContainsReferences(typeof(T));
             }
-            if (sizeof(T) > source.Length)
+            if (source.Length < sizeof(T))
             {
                 ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.length);
             }
@@ -491,7 +491,7 @@ public static unsafe bool TryRead<T>(ReadOnlySpan<byte> source, out T value)
             {
                 ThrowHelper.ThrowArgument_TypeContainsReferences(typeof(T));
             }
-            if (sizeof(T) > (uint)source.Length)
+            if (source.Length < sizeof(T))
             {
                 value = default;
                 return false;
@@ -511,7 +511,7 @@ public static unsafe void Write<T>(Span<byte> destination, in T value)
             {
                 ThrowHelper.ThrowArgument_TypeContainsReferences(typeof(T));
             }
-            if ((uint)sizeof(T) > (uint)destination.Length)
+            if (destination.Length < sizeof(T))
             {
                 ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.length);
             }
@@ -530,7 +530,7 @@ public static unsafe bool TryWrite<T>(Span<byte> destination, in T value)
             {
                 ThrowHelper.ThrowArgument_TypeContainsReferences(typeof(T));
             }
-            if (sizeof(T) > (uint)destination.Length)
+            if (destination.Length < sizeof(T))
             {
                 return false;
             }
@@ -553,7 +553,7 @@ public static unsafe ref T AsRef<T>(Span<byte> span)
             {
                 ThrowHelper.ThrowArgument_TypeContainsReferences(typeof(T));
             }
-            if (sizeof(T) > (uint)span.Length)
+            if (span.Length < sizeof(T))
             {
                 ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.length);
             }
@@ -575,7 +575,7 @@ public static unsafe ref readonly T AsRef<T>(ReadOnlySpan<byte> span)
             {
                 ThrowHelper.ThrowArgument_TypeContainsReferences(typeof(T));
             }
-            if (sizeof(T) > (uint)span.Length)
+            if (span.Length < sizeof(T))
             {
                 ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.length);
             }

src/libraries/System.Private.CoreLib/src/System/Runtime/Intrinsics/Vector512.cs

@@ -715,7 +715,7 @@ public static void CopyTo<T>(this Vector512<T> vector, T[] destination, int star
         /// <exception cref="NotSupportedException">The type of <paramref name="vector" /> and <paramref name="destination" /> (<typeparamref name="T" />) is not supported.</exception>
         public static void CopyTo<T>(this Vector512<T> vector, Span<T> destination)
         {
-            if ((uint)destination.Length < (uint)Vector512<T>.Count)
+            if (destination.Length < Vector512<T>.Count)
             {
                 ThrowHelper.ThrowArgumentException_DestinationTooShort();
             }
@@ -4045,7 +4045,7 @@ internal static Vector512<T> Truncate<T>(Vector512<T> vector)
         /// <exception cref="NotSupportedException">The type of <paramref name="vector" /> and <paramref name="destination" /> (<typeparamref name="T" />) is not supported.</exception>
         public static bool TryCopyTo<T>(this Vector512<T> vector, Span<T> destination)
         {
-            if ((uint)destination.Length < (uint)Vector512<T>.Count)
+            if (destination.Length < Vector512<T>.Count)
             {
                 return false;
             }