diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -132,6 +132,7 @@
 * Added support for the Cortex-X3 CPU.
 * Added support for the Neoverse V2 CPU.
 * Added support for assembly for RME MEC (Memory Encryption Contexts).
+* Added codegen support for the Armv8.3 Complex Number extension.
 
 Changes to the AMDGPU Backend
 -----------------------------
@@ -142,6 +143,7 @@
 * Support for targeting armv2, armv2A, armv3 and armv3M has been removed.
   LLVM did not, and was not ever likely to generate correct code for those
   architecture versions so their presence was misleading.
+* Added codegen support for the complex arithmetic instructions in MVE.
 
 Changes to the AVR Backend
 --------------------------