[doc][LoongArch] Add missed release note about ual feature addition

I meant to fold this into 4760181 but failed to do so. Reviewed By: MaskRay Differential Revision: https://reviews.llvm.org/D152671
llvm · Jun 26, 2023 · d0a32b0 · d0a32b0
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diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
@@ -682,6 +682,8 @@ LoongArch Support
 
 - Patchable function entry (``-fpatchable-function-entry``) is now supported
   on LoongArch.
+- Unaligned memory accesses can be toggled by ``-m[no-]unaligned-access`` or the
+  aliases ``-m[no-]strict-align``.
 
 RISC-V Support
 ^^^^^^^^^^^^^^

diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
@@ -173,6 +173,8 @@ Changes to the LoongArch Backend
 --------------------------------
 
 * The ``lp64s`` ABI is supported now and has been tested on Rust bare-matal target.
+* A target feature ``ual`` is introduced to allow unaligned memory accesses and
+  this feature is enabled by default for generic 64-bit processors.
 
 Changes to the MIPS Backend
 ---------------------------