[clang][docs] Release notes for C/C++ SVE Operators

Author: DavidTruby

clang/docs/LanguageExtensions.rst

@@ -532,6 +532,8 @@ number of literals can be specified.  For example:
   vector int vi5 = (vector int)(1, 2, 3, 4);
   float4 vf = (float4)((float2)(1.0f, 2.0f), (float2)(3.0f, 4.0f));
 
+.. _Vector Operations:
+
 Vector Operations
 -----------------
 

clang/docs/ReleaseNotes.rst

@@ -655,6 +655,10 @@ Arm and AArch64 Support in Clang
 - clang now supports the Cortex-M85 CPU, which can be chosen with
   `-mcpu=cortex-m85`. By default, this has PACBTI turned on, but it can be
   disabled with `-mcpu=cortex-m85+nopacbti`.
+- clang now supports using C/C++ operators on sizeless SVE vectors such as
+  `svint32_t`. The set of supported operators is shown in the table Vector
+  Operations found in the :ref:`Clang Language Extensions <Vector Operations>`
+  document.
 
 Floating Point Support in Clang
 -------------------------------