[llvm] 5639c0b - [llvm][docs] Add release note for LLDB AArch64 Linux SME only support (#189367)

[via llvm-commits]

Author: David Spickett
Date: 2026-04-01T13:36:55+01:00
New Revision: 5639c0bb3f721fea802b03aacd531d2a3ac71ac0

URL: https://github.com/llvm/llvm-project/commit/5639c0bb3f721fea802b03aacd531d2a3ac71ac0
DIFF: https://github.com/llvm/llvm-project/commit/5639c0bb3f721fea802b03aacd531d2a3ac71ac0.diff

LOG: [llvm][docs] Add release note for LLDB AArch64 Linux SME only support (#189367)

And highlights that some earlier versions have a critical issue on such
systems. This is not something we are able to fix (because the branches
are closed), but users and packagers have some options which are listed
in the issue.

Relates to #138717.

Added: 
    

Modified: 
    llvm/docs/ReleaseNotes.md

Removed: 
    


################################################################################
diff  --git a/llvm/docs/ReleaseNotes.md b/llvm/docs/ReleaseNotes.md
index 17e65e629f297..450b65a80c5cd 100644
--- a/llvm/docs/ReleaseNotes.md
+++ b/llvm/docs/ReleaseNotes.md
@@ -274,6 +274,15 @@ Changes to LLDB
 
 * On Arm Linux, the tpidruro register can now be read. Writing to this register is not supported.
 * Thread local variables are now supported on Arm Linux if the program being debugged is using glibc.
+* LLDB now supports AArch64 Linux systems that only have SME (as opposed to
+  SVE and SME). Prior to this version of LLDB, there was a bug that caused LLDB
+  to crash on startup on these systems
+  ([#138717](https://github.com/llvm/llvm-project/issues/138717)).
+  This affected LLDB versions from 18 up to and including 22. 17 and below are not affected.
+  If you are using such a system and cannot change LLDB version, or want to package
+  an affected version in a way that is compatible with these systems, the issue
+  contains details of backports that could be done to fix the affected versions.
+
 
 Changes to BOLT
 ---------------