[AArch64] Add some release notes items

[momchil-velikov]

No description provided.

[llvmbot]

@llvm/pr-subscribers-clang

Author: Momchil Velikov (momchil-velikov)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/79983.diff

2 Files Affected:

• (modified) clang/docs/ReleaseNotes.rst (+5)
• (modified) llvm/docs/ReleaseNotes.rst (+8)

diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 060bc7669b72..ab5fb5aee61a 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -1164,6 +1164,11 @@ Arm and AArch64 Support
   * Cortex-A720 (cortex-a720).
   * Cortex-X4 (cortex-x4).
 
+- Alpha support has been added for SVE2.1 intrinsics.
+
+- Support has been added for `-fstack-clash-protection` and `-mstack-probe-size`
+  command line options.
+
 Android Support
 ^^^^^^^^^^^^^^^
 
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index 7b6a3f10d637..990f5a5f73e8 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -105,6 +105,14 @@ Changes to the AArch64 Backend
   Armv9.0a has the same features enabled as Armv8.5a, with the exception
   of crypto.
 
+* Assembler/disassembler support has been added for 2023 architecture
+  extensions.
+
+* Support has been added for Stack Clash Protection. During function frame
+  creation and dynamic stack allocations, the compiler will issue memory
+  accesses at reguilar intervals so that a guard area at the top of the stack
+  can't be skipped over.
+
 Changes to the AMDGPU Backend
 -----------------------------